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Dr. Xinming Wang
Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou

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0 Ozone
0 volatile organic compounds
0 Aerosols
0 Organic Pollutants
0 Land-air exchange

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Journal article
Published: 11 August 2021 in Atmosphere
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In order to evaluate the toxicity of PM2.5 in the Dushanzi area, PM2.5 samples were collected from December 2015 to July 2016, and a plasmid DNA damage assessment method was used to analyze the variation in the oxidative damage ability and its relationship with sampling conditions and toxic components (polycyclic aromatic hydrocarbons, and heavy metals) loaded on the surface of PM2.5. The results showed that the TD30 values (toxic dosage of PM2.5 causing 30% of plasmid DNA damage) of both the whole samples and the water-soluble fractions were lower during the heating period (369 μg/mL and 536 μg/mL, respectively), but higher in the dust period and non-heating period (681 μg/mL and 498 μg/mL, respectively; and 804 μg/mL and 847 μg/mL, respectively). Studies on the effect of meteorological parameters showed an increasing trend in TD30 values for the whole samples and the water-soluble fractions as relative humidity, temperature and wind speed decrease. TD30 values for the whole samples and the water-soluble fractions were negatively correlated with Flu (r = −0.690,r = −0.668; p< 0.05), Flt (r =−0.671, r = −0.760; p< 0.05), BaP (r = −0.672, r = −0.725; p< 0.05), IcdP (r = −0.694, r = −0.740; p< 0.05), Pyr (r = −0.727, r = −0.768; p< 0.01) and BghiP (r = −0.874, r = −0.845; p< 0.01) during the heating period, while As (r = 0.792, r = 0.749; p< 0.05) and Sr (r = 0.776, r = 0.754; p< 0.05) during the dust period showed significant positive correlation. In addition, the TD30 values of PM2.5 collected during sand blowing weather was the highest (1458 μg/mL and 1750 μg/mL), while the average TD30 value of PM2.5 collected on hazy days were the lowest (419.8 μg/mL and 488.6 μg/mL). Particles collected on the first day after snowfall showed a lower oxidizing capacity (676 μg/mL and 1330 μg/mL). The characteristic TD30 values combined with back trajectory analysis indicated that hazy days were heavily influenced by air masses originating from the southern continent and local emissions, whereas the sand blowing weather came from the north of the Taklimakan Desert.

ACS Style

Juqin An; Dilnurt Talifu; Xiang Ding; Longyi Shao; Xinming Wang; Abulikemu Abulizi; Yalkunjan Tursun; Huibin Liu; Yuanyu Zhang; Turhun Aierken. Variation of Particle-Induced Oxidative Potential of PM2.5 in Xinjiang, NW-China. Atmosphere 2021, 12, 1028 .

AMA Style

Juqin An, Dilnurt Talifu, Xiang Ding, Longyi Shao, Xinming Wang, Abulikemu Abulizi, Yalkunjan Tursun, Huibin Liu, Yuanyu Zhang, Turhun Aierken. Variation of Particle-Induced Oxidative Potential of PM2.5 in Xinjiang, NW-China. Atmosphere. 2021; 12 (8):1028.

Chicago/Turabian Style

Juqin An; Dilnurt Talifu; Xiang Ding; Longyi Shao; Xinming Wang; Abulikemu Abulizi; Yalkunjan Tursun; Huibin Liu; Yuanyu Zhang; Turhun Aierken. 2021. "Variation of Particle-Induced Oxidative Potential of PM2.5 in Xinjiang, NW-China." Atmosphere 12, no. 8: 1028.

Research article
Published: 08 July 2021 in Atmospheric Chemistry and Physics
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China is confronting increasing ozone (O3) pollution that worsens air quality and public health. Extreme O3 pollution occurs more frequently under special events and unfavorable meteorological conditions. Here we observed significantly elevated maximum daily 8 h average (MDA8) O3 (up to 98 ppb) during the Chinese National Day holiday (CNDH) in 2018 throughout China, with a prominent rise by up to 120 % compared to the previous week. The air quality model shows that increased precursor emissions and regional transport are major contributors to the elevation. In the Pearl River Delta region, the regional transport contributed up to 30 ppb O3 during the CNDH. Simultaneously, aggravated health risk occurs due to high O3, inducing 33 % additional deaths throughout China. Moreover, in tourist cities such as Sanya, daily mortality even increases significantly from 0.4 to 1.6. This is the first comprehensive study to investigate O3 pollution during the CNDH at the national level, aiming to arouse more focus on the O3 holiday impact of the public.

ACS Style

Peng Wang; Juanyong Shen; Men Xia; Shida Sun; Yanli Zhang; Hongliang Zhang; Xinming Wang. Unexpected enhancement of ozone exposure and health risks during National Day in China. Atmospheric Chemistry and Physics 2021, 21, 10347 -10356.

AMA Style

Peng Wang, Juanyong Shen, Men Xia, Shida Sun, Yanli Zhang, Hongliang Zhang, Xinming Wang. Unexpected enhancement of ozone exposure and health risks during National Day in China. Atmospheric Chemistry and Physics. 2021; 21 (13):10347-10356.

Chicago/Turabian Style

Peng Wang; Juanyong Shen; Men Xia; Shida Sun; Yanli Zhang; Hongliang Zhang; Xinming Wang. 2021. "Unexpected enhancement of ozone exposure and health risks during National Day in China." Atmospheric Chemistry and Physics 21, no. 13: 10347-10356.

Research article
Published: 06 July 2021 in Atmospheric Chemistry and Physics
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Intermediate-volatility organic compounds (IVOCs) emitted from vehicles are important precursors to secondary organic aerosols (SOAs) in urban areas, yet vehicular emission of IVOCs, particularly from on-road fleets, is poorly understood. Here we initiated a field campaign to collect IVOCs with sorption tubes at both the inlet and the outlet in a busy urban tunnel (>30 000 vehicles per day) in south China for characterizing emissions of IVOCs from on-road vehicles. The average emission factor of IVOCs (EFIVOCs) was measured to be 16.77±0.89 mg km−1 (average ±95 % CI, confidence interval) for diesel and gasoline vehicles in the fleets, and based on linear regression, the average EFIVOCs was derived to be 62.79±18.37 mg km−1 for diesel vehicles and 13.95±1.13 mg km−1 for gasoline vehicles. The EFIVOCs for diesel vehicles from this study was comparable to that reported previously for non-road engines without after-treatment facilities, while the EFIVOCs for gasoline vehicles from this study was much higher than that recently tested for a China V gasoline vehicle. IVOCs from the on-road fleets did not show significant correlation with the primary organic aerosol (POA) or total non-methane hydrocarbons (NMHCs) as results from previous chassis dynamometer tests. Estimated SOA production from the vehicular IVOCs and VOCs surpassed the POA by a factor of ∼2.4, and IVOCs dominated over VOCs in estimated SOA production by a factor of ∼7, suggesting that controlling IVOCs is of greater importance to modulate traffic-related organic aerosol (OA) in urban areas. The results demonstrated that although on-road gasoline vehicles have much lower EFIVOCs, they contribute more IVOCs than on-road diesel vehicles due to its dominance in the on-road fleets. However, due to greater diesel than gasoline fuel consumption in China, emission of IVOCs from diesel engines would be much larger than that from gasoline engines, signaling the overwhelming contribution of IVOC emissions by non-road diesel engines in China.

ACS Style

Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel. Atmospheric Chemistry and Physics 2021, 21, 10005 -10013.

AMA Style

Hua Fang, Xiaoqing Huang, Yanli Zhang, Chenglei Pei, Zuzhao Huang, Yujun Wang, Yanning Chen, Jianhong Yan, Jianqiang Zeng, Shaoxuan Xiao, Shilu Luo, Sheng Li, Jun Wang, Ming Zhu, Xuewei Fu, Zhenfeng Wu, Runqi Zhang, Wei Song, Guohua Zhang, Weiwei Hu, Mingjin Tang, Xiang Ding, Xinhui Bi, Xinming Wang. Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel. Atmospheric Chemistry and Physics. 2021; 21 (13):10005-10013.

Chicago/Turabian Style

Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. 2021. "Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel." Atmospheric Chemistry and Physics 21, no. 13: 10005-10013.

Preprint content
Published: 22 June 2021
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ACS Style

Juanjuan Qin; Jihua Tan; Xueming Zhou; Yanrong Yang; Yuanyuan Qin; Xiaobo Wang; Shaoxuan Shi; Kang Xiao; Xinming Wang. Supplementary material to "Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC". 2021, 1 .

AMA Style

Juanjuan Qin, Jihua Tan, Xueming Zhou, Yanrong Yang, Yuanyuan Qin, Xiaobo Wang, Shaoxuan Shi, Kang Xiao, Xinming Wang. Supplementary material to "Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC". . 2021; ():1.

Chicago/Turabian Style

Juanjuan Qin; Jihua Tan; Xueming Zhou; Yanrong Yang; Yuanyuan Qin; Xiaobo Wang; Shaoxuan Shi; Kang Xiao; Xinming Wang. 2021. "Supplementary material to "Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC"." , no. : 1.

Preprint content
Published: 22 June 2021
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Water-soluble organic compounds (WSOC) are essential in atmospheric particle formation, migration, and transformation processes. Size-segregated atmospheric particles were collected in a rural area of Beijing. Excitation-emission matrix (EEM) fluorescence spectroscopy was used to investigate the sources and optical properties of WSOC. Sophisticated data analysis on EEM data was performed to characteristically estimate the underlying connections among aerosol particles in different sizes. The WSOC concentrations and average fluorescence intensity (AFI) showed monomodal distribution in winter and bimodal distribution in summer, with dominant mode between 0.26 to 0.44 µm for both seasons. The EEM spectra of size-segregated WSOC were different among variant particle sizes, which could be the results of changing sources and/or chemical transformation of organics. Size distributions of fluorescence regional intensity (region Ⅲ and Ⅴ) and HIX indicate that humification degree or aromaticity of WSOC was highest between 0.26 to 0.44 µm. The Stokes shift (SS) and the harmonic mean of the excitation and emission wavelengths (WH) reflected that π-conjugated systems were high between 0.26 to 0.44 µm as well. The parallel factor analysis (PARAFAC) results showed that humic-like substances were abundant in fine particles (< 1 µm) and peaked at 0.26–0.44 µm. All evidence supported that the humification degree of WSOC increased in submicron mode (< 0.44 µm) and decreased gradually. Thus, it was conjectured that condensation of organics still goes on in submicron mode, resulting in the highest humification degree exhibit in particle size between 0.26 to 0.44 µm rather than < 0.26 µm. Synthetically analyzing 3-dimensional fluorescence data could efficiently present the secondary transformation processes of WSOC.

ACS Style

Juanjuan Qin; Jihua Tan; Xueming Zhou; Yanrong Yang; Yuanyuan Qin; Xiaobo Wang; Shaoxuan Shi; Kang Xiao; Xinming Wang. Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC. 2021, 2021, 1 -24.

AMA Style

Juanjuan Qin, Jihua Tan, Xueming Zhou, Yanrong Yang, Yuanyuan Qin, Xiaobo Wang, Shaoxuan Shi, Kang Xiao, Xinming Wang. Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC. . 2021; 2021 ():1-24.

Chicago/Turabian Style

Juanjuan Qin; Jihua Tan; Xueming Zhou; Yanrong Yang; Yuanyuan Qin; Xiaobo Wang; Shaoxuan Shi; Kang Xiao; Xinming Wang. 2021. "Particle size-dependent fluorescence properties of water-soluble organic compounds (WSOC) and their atmospheric implications on the aging of WSOC." 2021, no. : 1-24.

Journal article
Published: 16 June 2021 in Journal of Geophysical Research: Atmospheres
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Heterogeneous reaction of NO2 with CaCO3, an abundant and reactive component in mineral dust aerosol, was investigated in this work at different relative humidifies (RH, up to 80%), using a fixed-bed reactor. Ion chromatograph and a vapor sorption analyzer were employed to measure changes in particulate nitrate and water with reaction time (up to 24 h). When NO2 concentration was ∼10 ppmv (∼2.5 × 1014 molecule cm−3), CaCO3 showed very low reactivity toward NO2 at <1% RH, and γ(NO2) was estimated to be <2 × 10−8; consequently, no significant change in hygroscopicity of CaCO3 particles was observed after reaction with NO2 for 24 h at <1% RH, as the amount of nitrate formed was very limited. Heterogeneous reactivity was significantly enhanced at elevated RH (20%–80%), and during the reaction CaCO3 was covered with a deliquesced layer resulting from water uptake by formed nitrate; in addition, the average γ(NO2) was determined to be (1.21 ± 0.45) × 10−7, independent of RH (20%–80%) and reaction time (3–24 h). After reaction with 10 ppmv NO2 for 24 h at elevated RH (20%–80%), the mass of particulate water associated with reacted CaCO3 at 90% RH was equal to ∼45% of the mass of unreacted CaCO3, suggesting that heterogeneous reaction of CaCO3 with NO2 at 20%–80% RH could substantially increase its hygroscopicity. Overall, our laboratory study suggested that heterogeneous reaction with NO2 may significantly impact composition and hygroscopicity of CaCO3 particles.

ACS Style

Xiaohong Jia; Wenjun Gu; Chao Peng; Rui Li; Lanxiadi Chen; Hongli Wang; Haichao Wang; Xinming Wang; Mingjin Tang. Heterogeneous Reaction of CaCO 3 With NO 2 at Different Relative Humidities: Kinetics, Mechanisms, and Impacts on Aerosol Hygroscopicity. Journal of Geophysical Research: Atmospheres 2021, 126, 1 .

AMA Style

Xiaohong Jia, Wenjun Gu, Chao Peng, Rui Li, Lanxiadi Chen, Hongli Wang, Haichao Wang, Xinming Wang, Mingjin Tang. Heterogeneous Reaction of CaCO 3 With NO 2 at Different Relative Humidities: Kinetics, Mechanisms, and Impacts on Aerosol Hygroscopicity. Journal of Geophysical Research: Atmospheres. 2021; 126 (11):1.

Chicago/Turabian Style

Xiaohong Jia; Wenjun Gu; Chao Peng; Rui Li; Lanxiadi Chen; Hongli Wang; Haichao Wang; Xinming Wang; Mingjin Tang. 2021. "Heterogeneous Reaction of CaCO 3 With NO 2 at Different Relative Humidities: Kinetics, Mechanisms, and Impacts on Aerosol Hygroscopicity." Journal of Geophysical Research: Atmospheres 126, no. 11: 1.

Journal article
Published: 13 June 2021 in ACS Applied Nano Materials
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Suzuki–Miyaura cross-coupling (SMC) reaction by palladium (Pd) catalysis is widely used in cross-coupling chemistry synthesis for C—C bond formation, yet the biaryl products are generally lacking halo substituents due to highly active palladium species. Suitable catalysts according to this property for the region-selective SMC synthesis of biaryl derivatives with halo substituents did not receive due and sufficient attention. Here, we report the facile synthesis of a covalent organic frameworks (COFs)-supported nanoparticles Pd catalyst that can region-selectively catalyze the SMC reaction of aryl boronic acids and aryl halides, especially with halogenated aryl boronic acids. The methodology exhibits mild operating conditions, broad functional group tolerance, and environmental friendliness and can be strategically applied for cross-coupling scenarios governed by sequential transition metal catalysts to build with or without a halo-substituted moiety. The Pd/COF-SMC nanoparticles catalysts are stable and reusable and succeed in synthesizing halo-substituted biaryl products in excellent yield, which avoids the homocoupling of halogenated aryl boronic acid. The most outstanding advantage is the precise regulation of nanoparticles Pd activity with the well-designed COF ligand.

ACS Style

Jianguo Liu; Hao Zhan; Nan Wang; Yanpei Song; Chenguang Wang; Xinming Wang; Longlong Ma; Lungang Chen. Palladium Nanoparticles on Covalent Organic Framework Supports as Catalysts for Suzuki–Miyaura Cross-Coupling Reactions. ACS Applied Nano Materials 2021, 1 .

AMA Style

Jianguo Liu, Hao Zhan, Nan Wang, Yanpei Song, Chenguang Wang, Xinming Wang, Longlong Ma, Lungang Chen. Palladium Nanoparticles on Covalent Organic Framework Supports as Catalysts for Suzuki–Miyaura Cross-Coupling Reactions. ACS Applied Nano Materials. 2021; ():1.

Chicago/Turabian Style

Jianguo Liu; Hao Zhan; Nan Wang; Yanpei Song; Chenguang Wang; Xinming Wang; Longlong Ma; Lungang Chen. 2021. "Palladium Nanoparticles on Covalent Organic Framework Supports as Catalysts for Suzuki–Miyaura Cross-Coupling Reactions." ACS Applied Nano Materials , no. : 1.

Journal article
Published: 04 June 2021 in Atmospheric Chemistry and Physics
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The oxidation of biogenic and anthropogenic compounds leads to the formation of secondary organic aerosol mass (SOA). The present study aims to investigate α-pinene, limonene, and m-cresol with regards to their SOA formation potential dependent on relative humidity (RH) under night- (NO3 radicals) and daytime conditions (OH radicals) and the resulting chemical composition. It was found that SOA formation potential of limonene with NO3 under dry conditions significantly exceeds that of the OH-radical reaction, with SOA yields of 15–30 % and 10–21 %, respectively. Additionally, the nocturnal SOA yield was found to be very sensitive towards RH, yielding more SOA under dry conditions. In contrast, the SOA formation potential of α-pinene with NO3 slightly exceeds that of the OH-radical reaction, independent from RH. On average, α-pinene yielded SOA with about 6–7 % from NO3 radicals and 3–4 % from OH-radical reaction. Surprisingly, unexpectedly high SOA yields were found for m-cresol oxidation with OH radicals (3–9 %), with the highest yield under elevated RH (9 %), which is most likely attributable to a higher fraction of 3-methyl-6-nitro-catechol (MNC). While α-pinene and m-cresol SOA was found to be mainly composed of water-soluble compounds, 50–68 % of nocturnal SOA and 22–39 % of daytime limonene SOA are water-insoluble. The fraction of SOA-bound peroxides which originated from α-pinene varied between 2 and 80 % as a function of RH. Furthermore, SOA from α-pinene revealed pinonic acid as the most important particle-phase constituent under day- and nighttime conditions with a fraction of 1–4 %. Other compounds detected are norpinonic acid (0.05–1.1 % mass fraction), terpenylic acid (0.1–1.1 % mass fraction), pinic acid (0.1–1.8 % mass fraction), and 3-methyl-1,2,3-tricarboxylic acid (0.05–0.5 % mass fraction). All marker compounds showed higher fractions under dry conditions when formed during daytime and showed almost no RH effect when formed during night.

ACS Style

Anke Mutzel; Yanli Zhang; Olaf Böge; Maria Rodigast; Agata Kolodziejczyk; Xinming Wang; Hartmut Herrmann. Importance of secondary organic aerosol formation of α-pinene, limonene, and m-cresol comparing day- and nighttime radical chemistry. Atmospheric Chemistry and Physics 2021, 21, 8479 -8498.

AMA Style

Anke Mutzel, Yanli Zhang, Olaf Böge, Maria Rodigast, Agata Kolodziejczyk, Xinming Wang, Hartmut Herrmann. Importance of secondary organic aerosol formation of α-pinene, limonene, and m-cresol comparing day- and nighttime radical chemistry. Atmospheric Chemistry and Physics. 2021; 21 (11):8479-8498.

Chicago/Turabian Style

Anke Mutzel; Yanli Zhang; Olaf Böge; Maria Rodigast; Agata Kolodziejczyk; Xinming Wang; Hartmut Herrmann. 2021. "Importance of secondary organic aerosol formation of α-pinene, limonene, and m-cresol comparing day- and nighttime radical chemistry." Atmospheric Chemistry and Physics 21, no. 11: 8479-8498.

Research article
Published: 04 June 2021 in Environmental Science & Technology
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Fatty acids are ubiquitous constituents of grime on urban and indoor surfaces and they represent important surfactants on organic aerosol particles in the atmosphere. Here, we assess the heterogeneous processing of NO2 on films consisting of pure oleic acid (OA) or a mixture of OA and representative salts for urban grime and aerosol particles, namely Na2SO4 and NaNO3. The uptake coefficients of NO2 on OA under light irradiation (300 nm < λ < 400 nm) decreased with increasing relative humidity (RH), from (1.4 ± 0.1) × 10–6 at 0% RH to (7.1 ± 1.6) × 10–7 at 90% RH. The uptake process of NO2 on OA gives HONO as a reaction product, and the highest HONO production was observed upon the heterogeneous reaction of NO2 with OA in the presence of nitrate (NO3–) ions. The formation of gaseous nitroaromatic compounds was also enhanced in the presence of NO3– ions upon light-induced heterogeneous processing of NO2 with OA, as revealed by membrane inlet single-photon ionization time-of-flight mass spectrometry (MI-SPI-TOFMS). These results suggest that inorganic salts can affect the heterogeneous conversion of gaseous NO2 on fatty acids and enhance the formation of HONO and other N-containing organic compounds in the atmosphere.

ACS Style

Huifan Deng; Jiangping Liu; Yiqun Wang; Wei Song; Xinming Wang; Xue Li; Davide Vione; Sasho Gligorovski. Effect of Inorganic Salts on N-Containing Organic Compounds Formed by Heterogeneous Reaction of NO2 with Oleic Acid. Environmental Science & Technology 2021, 55, 7831 -7840.

AMA Style

Huifan Deng, Jiangping Liu, Yiqun Wang, Wei Song, Xinming Wang, Xue Li, Davide Vione, Sasho Gligorovski. Effect of Inorganic Salts on N-Containing Organic Compounds Formed by Heterogeneous Reaction of NO2 with Oleic Acid. Environmental Science & Technology. 2021; 55 (12):7831-7840.

Chicago/Turabian Style

Huifan Deng; Jiangping Liu; Yiqun Wang; Wei Song; Xinming Wang; Xue Li; Davide Vione; Sasho Gligorovski. 2021. "Effect of Inorganic Salts on N-Containing Organic Compounds Formed by Heterogeneous Reaction of NO2 with Oleic Acid." Environmental Science & Technology 55, no. 12: 7831-7840.

Research article
Published: 03 June 2021 in Atmospheric Chemistry and Physics
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The atmospheric processes under polluted environments involving interactions of anthropogenic pollutants and natural emissions lead to the formation of various and complex secondary products. Therefore, the characterization of oxygenated organic compounds in urban areas remains a pivotal issue in our understanding of the evolution of organic carbon. Here, we describe measurements of an iodide chemical ionization time-of-flight mass spectrometer installed with a Filter Inlet for Gases and AEROsols (FIGAERO-I-CIMS) in both the gas phase and the particle phase at an urban site in Guangzhou, a typical megacity in southern China, during the autumn of 2018. Abundant oxygenated organic compounds containing two to five oxygen atoms were observed, including organic acids, multi-functional organic compounds typically emitted from biomass burning, oxidation products of biogenic hydrocarbons and aromatics. Photochemistry played dominant roles in the formation of gaseous organic acids and isoprene-derived organic nitrates, while nighttime chemistry contributed significantly to the formation of monoterpene-derived organic nitrates and inorganics. Nitrogen-containing organic compounds occupied a significant fraction of the total signal in both the gas and particle phases, with elevated fractions at higher molecular weights. Measurements of organic compounds in the particle phase by FIGAERO-I-CIMS explained 24 ± 0.8 % of the total organic aerosol mass measured by aerosol mass spectrometer (AMS), and the fraction increased for more aged organic aerosol. The systematical interpretation of mass spectra of the FIGAERO-I-CIMS in the urban area of Guangzhou provides a holistic view of numerous oxygenated organic compounds in the urban atmosphere, which can serve as a reference for the future field measurements by FIGAERO-I-CIMS in polluted urban regions.

ACS Style

Chenshuo Ye; Bin Yuan; Yi Lin; Zelong Wang; Weiwei Hu; Tiange Li; Wei Chen; Caihong Wu; Chaomin Wang; Shan Huang; Jipeng Qi; Baolin Wang; Chen Wang; Wei Song; Xinming Wang; E Zheng; Jordan E. Krechmer; Penglin Ye; Zhanyi Zhang; Xuemei Wang; Douglas R. Worsnop; Min Shao. Chemical characterization of oxygenated organic compounds in the gas phase and particle phase using iodide CIMS with FIGAERO in urban air. Atmospheric Chemistry and Physics 2021, 21, 8455 -8478.

AMA Style

Chenshuo Ye, Bin Yuan, Yi Lin, Zelong Wang, Weiwei Hu, Tiange Li, Wei Chen, Caihong Wu, Chaomin Wang, Shan Huang, Jipeng Qi, Baolin Wang, Chen Wang, Wei Song, Xinming Wang, E Zheng, Jordan E. Krechmer, Penglin Ye, Zhanyi Zhang, Xuemei Wang, Douglas R. Worsnop, Min Shao. Chemical characterization of oxygenated organic compounds in the gas phase and particle phase using iodide CIMS with FIGAERO in urban air. Atmospheric Chemistry and Physics. 2021; 21 (11):8455-8478.

Chicago/Turabian Style

Chenshuo Ye; Bin Yuan; Yi Lin; Zelong Wang; Weiwei Hu; Tiange Li; Wei Chen; Caihong Wu; Chaomin Wang; Shan Huang; Jipeng Qi; Baolin Wang; Chen Wang; Wei Song; Xinming Wang; E Zheng; Jordan E. Krechmer; Penglin Ye; Zhanyi Zhang; Xuemei Wang; Douglas R. Worsnop; Min Shao. 2021. "Chemical characterization of oxygenated organic compounds in the gas phase and particle phase using iodide CIMS with FIGAERO in urban air." Atmospheric Chemistry and Physics 21, no. 11: 8455-8478.

Journal article
Published: 26 May 2021 in Atmospheric Environment
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Carbonyls play a vital role in atmospheric photochemistry. Vehicle emission is among most important primary emission sources of carbonyls in urban areas, yet knowledge is quite scarce about real-world emissions of carbonyls with the changing on-road vehicle fleets. In this study, emissions of carbonyls were characterized based on tests in a busy urban tunnel in south China. Emission factor (EF) of carbonyls was measured to be 9.89 ± 0.65 mg km−1 on average, in which formaldehyde alone shared 53.1% with an EF of 5.25 ± 0.35 mg km−1, followed by acetaldehyde with an EF of 1.47 ± 0.13 mg km−1. Glyoxal and methylglyoxal showed identical EFs of 0.18 ± 0.02 mg km−1. Multiple linear regression retrieved total carbonyl EFs of 5.68, 47.71 and 35.09 mg km−1 and ozone formation potentials (OFPs) of 38.4, 329.3, and 242.4 mg km−1 for gasoline, diesel and liquefied petroleum gas vehicles (LPGVs), respectively. The unexpectedly high carbonyl emissions from LPGVs were largely attributed to the lack of after-treatment systems or the inefficiency of the after-treatment systems. Among vehicle-emitted non-methane hydrocarbons and carbonyls, carbonyls could contribute ~20% of the total OFPs while they only accounted for 7.1% of the total mass.

ACS Style

Zhenfeng Wu; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Xiaoqing Huang; Shaoxuan Xiao; Shilu Luo; Jianqiang Zeng; Jun Wang; Hua Fang; Runqi Zhang; Sheng Li; Xuewei Fu; Wei Song; Xinming Wang. Real-world emissions of carbonyls from vehicles in an urban tunnel in south China. Atmospheric Environment 2021, 258, 118491 .

AMA Style

Zhenfeng Wu, Yanli Zhang, Chenglei Pei, Zuzhao Huang, Yujun Wang, Yanning Chen, Jianhong Yan, Xiaoqing Huang, Shaoxuan Xiao, Shilu Luo, Jianqiang Zeng, Jun Wang, Hua Fang, Runqi Zhang, Sheng Li, Xuewei Fu, Wei Song, Xinming Wang. Real-world emissions of carbonyls from vehicles in an urban tunnel in south China. Atmospheric Environment. 2021; 258 ():118491.

Chicago/Turabian Style

Zhenfeng Wu; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Xiaoqing Huang; Shaoxuan Xiao; Shilu Luo; Jianqiang Zeng; Jun Wang; Hua Fang; Runqi Zhang; Sheng Li; Xuewei Fu; Wei Song; Xinming Wang. 2021. "Real-world emissions of carbonyls from vehicles in an urban tunnel in south China." Atmospheric Environment 258, no. : 118491.

Research article
Published: 17 May 2021 in Environmental Science & Technology
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Both decabromodiphenyl ether (BDE 209) and decabromodiphenyl ethane (DBDPE) are still produced in large quantities in China, especially in the Shandong Province closed to the Bohai Sea (BS). This study conducted a comprehensive investigation of the distribution and budget of brominated flame retardants (BFRs) in the BS. BDE 209 was the predominant BFR in most of the investigated rivers flowing into the BS, although DBDPE exceeded BDE 209 in certain rivers as a result of the replacement of BDE 209 with DBDPE in North China. The spatial distributions of BFRs in the rivers were controlled by the proximity of the BFR manufacturing base and the extent of urbanization. BFRs’ spatial distribution in the BS was influenced by a combination of land-based pollution sources, environmental parameters (e.g., suspended particulate matter, particulate organic carbon, and particulate black carbon), and hydrodynamic conditions. The spatial variation trend of BDE 209/DBDPE ratios in various environmental media provided useful information. Vertically, the BDE 209/DBDPE ratio decreased from the seawater surface layer to the sediment, indicating their differential transport in the BS. A multi-box mass balance model and analysis of BDE 209 showed that degradation was the primary sink of BFRs in seawater (∼68%) and surface sediment (∼72%) in the BS.

ACS Style

Xiaomei Zhen; Yanfang Li; Jianhui Tang; Xinming Wang; Lin Liu; Mingyu Zhong; Chongguo Tian. Decabromodiphenyl Ether versus Decabromodiphenyl Ethane: Source, Fate, and Influencing Factors in a Coastal Sea Nearing Source Region. Environmental Science & Technology 2021, 1 .

AMA Style

Xiaomei Zhen, Yanfang Li, Jianhui Tang, Xinming Wang, Lin Liu, Mingyu Zhong, Chongguo Tian. Decabromodiphenyl Ether versus Decabromodiphenyl Ethane: Source, Fate, and Influencing Factors in a Coastal Sea Nearing Source Region. Environmental Science & Technology. 2021; ():1.

Chicago/Turabian Style

Xiaomei Zhen; Yanfang Li; Jianhui Tang; Xinming Wang; Lin Liu; Mingyu Zhong; Chongguo Tian. 2021. "Decabromodiphenyl Ether versus Decabromodiphenyl Ethane: Source, Fate, and Influencing Factors in a Coastal Sea Nearing Source Region." Environmental Science & Technology , no. : 1.

Journal article
Published: 10 May 2021 in Atmospheric Chemistry and Physics
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Organosulfates (OSs) are important constituents of secondary organic aerosols, but their hygroscopic properties and cloud condensation nucleation (CCN) activities have not been well understood. In this work we employed three complementary techniques to characterize interactions of several OSs with water vapor under sub- and supersaturated conditions. A vapor sorption analyzer was used to measure mass changes in OS samples with relative humidity (RH, 0 %–90 %); among the 11 organosulfates examined, only sodium methyl sulfate (methyl-OS), sodium ethyl sulfate (ethyl-OS), sodium octyl sulfate (octyl-OS) and potassium hydroxyacetone sulfate were found to deliquesce as RH increased, and their mass growth factors at 90 % RH were determined to be 3.65 ± 0.06, 3.58 ± 0.02, 1.59 ± 0.01 and 2.20 ± 0.03. Hygroscopic growth of methyl-, ethyl- and octyl-OS aerosols was also studied using a humidity tandem differential mobility analyzer (H-TDMA); continuous hygroscopic growth was observed, and their growth factors at 90 % RH were determined to be 1.83 ± 0.03, 1.79 ± 0.02 and 1.21 ± 0.02. We further investigated CCN activities of methyl-, ethyl- and octyl-OS aerosols, and their single hygroscopicity parameters (κccn) were determined to be 0.459 ± 0.021, 0.397 ± 0.010 and 0.206 ± 0.008. For methyl- and ethyl-OS aerosols, κccn values agree reasonably well with those derived from H-TDMA measurements (κgf) with relative differences being < 25 %, whereas κccn was found to be ∼ 2.4 times larger than κgf for octyl-OS, likely due to both the solubility limit and surface tension reduction.

ACS Style

Chao Peng; Patricia N. Razafindrambinina; Kotiba A. Malek; Lanxiadi Chen; Weigang Wang; Ru-Jin Huang; Yuqing Zhang; Xiang Ding; Maofa Ge; Xinming Wang; Akua A. Asa-Awuku; Mingjin Tang. Interactions of organosulfates with water vapor under sub- and supersaturated conditions. Atmospheric Chemistry and Physics 2021, 21, 7135 -7148.

AMA Style

Chao Peng, Patricia N. Razafindrambinina, Kotiba A. Malek, Lanxiadi Chen, Weigang Wang, Ru-Jin Huang, Yuqing Zhang, Xiang Ding, Maofa Ge, Xinming Wang, Akua A. Asa-Awuku, Mingjin Tang. Interactions of organosulfates with water vapor under sub- and supersaturated conditions. Atmospheric Chemistry and Physics. 2021; 21 (9):7135-7148.

Chicago/Turabian Style

Chao Peng; Patricia N. Razafindrambinina; Kotiba A. Malek; Lanxiadi Chen; Weigang Wang; Ru-Jin Huang; Yuqing Zhang; Xiang Ding; Maofa Ge; Xinming Wang; Akua A. Asa-Awuku; Mingjin Tang. 2021. "Interactions of organosulfates with water vapor under sub- and supersaturated conditions." Atmospheric Chemistry and Physics 21, no. 9: 7135-7148.

Preprint content
Published: 03 May 2021
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Yihang Yu; Peng Cheng; Huirong Li; Wenda Yang; Baobin Han; Wei Song; Weiwei Hu; Xinming Wang; Bin Yuan; Min Shao; Zhijiong Huang; Zhen Li; Junyu Zheng; Haichao Wang; Xiaofang Yu. Supplementary material to "Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China". 2021, 1 .

AMA Style

Yihang Yu, Peng Cheng, Huirong Li, Wenda Yang, Baobin Han, Wei Song, Weiwei Hu, Xinming Wang, Bin Yuan, Min Shao, Zhijiong Huang, Zhen Li, Junyu Zheng, Haichao Wang, Xiaofang Yu. Supplementary material to "Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China". . 2021; ():1.

Chicago/Turabian Style

Yihang Yu; Peng Cheng; Huirong Li; Wenda Yang; Baobin Han; Wei Song; Weiwei Hu; Xinming Wang; Bin Yuan; Min Shao; Zhijiong Huang; Zhen Li; Junyu Zheng; Haichao Wang; Xiaofang Yu. 2021. "Supplementary material to "Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China"." , no. : 1.

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Published: 03 May 2021
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Nitrous acid (HONO) can produce hydroxyl radicals (OH) by photolysis and plays an important role in atmospheric photochemistry. Over the years, high concentrations of HONO have been observed in the Pearl River Delta region (PRD) of China, which may be one reason for the elevated atmospheric oxidation capacity. A comprehensive atmospheric observation campaign was conducted at an urban site in Guangzhou from 27 September to 9 November 2018. During the period, HONO was measured from 0.02 to 4.43 ppbv with an average of 0.74 ± 0.70 ppbv. The emission ratios (HONO/NOx) of 0.9 ± 0.4 % were derived from 11 fresh plumes. The primary emission rates of HONO at night were calculated to be between 0.04 ± 0.02 ppbv h−1 and 0.30 ± 0.15 ppbv h−1 based on a high-resolution emission inventory. The HONO formation rate by the homogeneous reaction of OH + NO at night was 0.26 ± 0.08 ppbv h−1, which can be seen as secondary results from primary emission. They were both much higher than the increase rate of HONO (0.02 ppbv h−1) during night. Soil emission rate of HONO at night was calculated to be 0.019 ± 0.001 ppbv h−1. Assuming dry deposition as the dominant removal process of HONO at night, and a deposition velocity of at least ~2.5 cm s−1 is required to balance the direct emissions and OH + NO reaction. Correlation analysis shows that NH3 and relative humidity (RH) may participate in the heterogeneous transformation from NO2 to HONO at night. In the daytime, the average primary emission Pemis was 0.12 ± 0.01 ppbv h−1, and the homogeneous reaction POH + NO was 0.79 ± 0.61 ppbv h−1, larger than the unknown sources PUnknown (0.65 ± 0.46 ppbv h−1). These results suggest primary emissions as a key factor affecting HONO at our site, both during daytime and nighttime. Similar to previous studies, the daytime unknown source of HONO, PUnknown, appeared to be related to the photo-enhanced conversion of NO2. The daytime average OH production rates by photolysis of HONO was 3.7 × 106 cm−3 s−1, lower than that from O1D + H2O at 4.9 × 106 cm−3 s−1. Simulations of OH and O3 with the Master Chemical Mechanism (MCM) box model suggested strong enhancement effect of HONO on OH and O3 by 59 % and 68.8 %, respectively, showing a remarkable contribution of HONO to the atmospheric oxidation in the fall season of Guangzhou.

ACS Style

Yihang Yu; Peng Cheng; Huirong Li; Wenda Yang; Baobin Han; Wei Song; Weiwei Hu; Xinming Wang; Bin Yuan; Min Shao; Zhijiong Huang; Zhen Li; Junyu Zheng; Haichao Wang; Xiaofang Yu. Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China. 2021, 2021, 1 -38.

AMA Style

Yihang Yu, Peng Cheng, Huirong Li, Wenda Yang, Baobin Han, Wei Song, Weiwei Hu, Xinming Wang, Bin Yuan, Min Shao, Zhijiong Huang, Zhen Li, Junyu Zheng, Haichao Wang, Xiaofang Yu. Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China. . 2021; 2021 ():1-38.

Chicago/Turabian Style

Yihang Yu; Peng Cheng; Huirong Li; Wenda Yang; Baobin Han; Wei Song; Weiwei Hu; Xinming Wang; Bin Yuan; Min Shao; Zhijiong Huang; Zhen Li; Junyu Zheng; Haichao Wang; Xiaofang Yu. 2021. "Budget of nitrous acid (HONO) and its impacts on atmospheric oxidation capacity at an urban site in the fall season of Guangzhou, China." 2021, no. : 1-38.

Journal article
Published: 27 April 2021 in Atmospheric Chemistry and Physics
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Isoprene is the most important biogenic volatile organic compound in the atmosphere. Its calculated impact on ozone (O3) is critically dependent on the model isoprene oxidation chemical scheme, in particular the way the isoprene-derived organic nitrates (IN) are treated. By combining gas chromatography with mass spectrometry, we have developed a system capable of separating and unambiguously measuring individual IN isomers. In this paper we use measurements from its first field deployment, which took place in Beijing as part of the Atmospheric Pollution and Human Health in a Chinese Megacity programme, to test understanding of the isoprene chemistry as simulated in the Master Chemical Mechanism (MCM) (v.3.3.1). Seven individual isoprene nitrates were identified and quantified during the campaign: two β-hydroxy nitrates (IHN), four δ-carbonyl nitrates (ICN), and propanone nitrate. Our measurements show that in the summertime conditions experienced in Beijing the ratio of (1-OH, 2-ONO2)-IHN to (4-OH, 3-ONO2)-IHN (the numbers indicate the carbon atom in the isoprene chain to which the radical is added) increases at NO mixing ratios below 2 ppb. This provides observational field evidence of the redistribution of the peroxy radicals derived from OH oxidation of isoprene away from the kinetic ratio towards a new thermodynamic equilibrium consistent with box model calculations. The observed amounts of δ-ICN demonstrate the importance of daytime addition of NO3 to isoprene in Beijing but suggest that the predominant source of the δ-ICN in the model (reaction of NO with δ-nitrooxy peroxy radicals) may be too large. Our speciated measurements of the four δ-ICN exhibit a mean C1 : C4 isomer ratio of 1.4 and a mean trans : cis isomer ratio of 7 and provide insight into the isomeric distribution of the δ-nitrooxy peroxy radicals. Together our measurements and model results indicate that propanone nitrate was formed from the OH oxidation of δ-ICN both during the day and night, as well as from NO3 addition to propene at night. This study demonstrates the value of speciated IN measurements in testing understanding of the isoprene degradation chemistry and shows how more extensive measurements would provide greater constraints. It highlights areas of the isoprene chemistry that warrant further study, in particular the impact of NO on the formation of the IHN and the NO3-initiated isoprene degradation chemistry, as well as the need for further laboratory studies on the formation and the losses of IN, in particular via photolysis of δ-ICN and hydrolysis.

ACS Style

Claire E. Reeves; Graham P. Mills; Lisa K. Whalley; W. Joe F. Acton; William J. Bloss; Leigh R. Crilley; Sue Grimmond; Dwayne E. Heard; C. Nicholas Hewitt; James R. Hopkins; Simone Kotthaus; Louisa J. Kramer; Roderic L. Jones; James D. Lee; Yanhui Liu; Bin Ouyang; Eloise Slater; Freya Squires; Xinming Wang; Robert Woodward-Massey; Chunxiang Ye. Observations of speciated isoprene nitrates in Beijing: implications for isoprene chemistry. Atmospheric Chemistry and Physics 2021, 21, 6315 -6330.

AMA Style

Claire E. Reeves, Graham P. Mills, Lisa K. Whalley, W. Joe F. Acton, William J. Bloss, Leigh R. Crilley, Sue Grimmond, Dwayne E. Heard, C. Nicholas Hewitt, James R. Hopkins, Simone Kotthaus, Louisa J. Kramer, Roderic L. Jones, James D. Lee, Yanhui Liu, Bin Ouyang, Eloise Slater, Freya Squires, Xinming Wang, Robert Woodward-Massey, Chunxiang Ye. Observations of speciated isoprene nitrates in Beijing: implications for isoprene chemistry. Atmospheric Chemistry and Physics. 2021; 21 (8):6315-6330.

Chicago/Turabian Style

Claire E. Reeves; Graham P. Mills; Lisa K. Whalley; W. Joe F. Acton; William J. Bloss; Leigh R. Crilley; Sue Grimmond; Dwayne E. Heard; C. Nicholas Hewitt; James R. Hopkins; Simone Kotthaus; Louisa J. Kramer; Roderic L. Jones; James D. Lee; Yanhui Liu; Bin Ouyang; Eloise Slater; Freya Squires; Xinming Wang; Robert Woodward-Massey; Chunxiang Ye. 2021. "Observations of speciated isoprene nitrates in Beijing: implications for isoprene chemistry." Atmospheric Chemistry and Physics 21, no. 8: 6315-6330.

Journal article
Published: 17 April 2021 in Atmosphere
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Ambient carbonyls are critical precursors of ozone (O3) and secondary organic aerosols (SOA). To better understand the pollution characteristics of carbonyls in Taiyuan, field samplings were conducted, and 13 carbonyls were detected in an urban site of Taiyuan for the four seasons. The total concentration of carbonyls in the atmosphere was 19.67 ± 8.56 μg/m3. Formaldehyde (7.70 ± 4.78 μg/m3), acetaldehyde (2.95 ± 1.20 μg/m3) and acetone (5.57 ± 2.41 μg/m3) were the dominant carbonyl compounds, accounting for more than 85% of the total carbonyls. The highest values for formaldehyde and acetone occurred in summer and autumn, respectively, and the lowest occurred in winter. The variations for acetaldehyde were not distinct in the four seasons. Formaldehyde and acetone levels increased obviously in the daytime and decreased at night, while acetaldehyde did not show significant diurnal variations. Higher temperature and stronger sunlight intensity could facilitate the photochemical reaction of volatile organic compounds (VOCs) and enhance the O3 levels in summer. Formaldehyde and acetaldehyde contributed 70–95% of carbonyls’ ozone formation potential (OFP) caused by carbonyls with the highest totals of 268.62 μg/m3 and 38.14 μg/m3, respectively. The highest concentrations of carbonyls from south and southwest winds in summer suggest that the coke industries in the southern Taiyuan Basin should be, firstly, controlled for the alleviation of ozone pollution.

ACS Style

Zeqian Liu; Yang Cui; Qiusheng He; Lili Guo; Xueying Gao; Yanli Feng; Yuhang Wang; Xinming Wang. Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China. Atmosphere 2021, 12, 510 .

AMA Style

Zeqian Liu, Yang Cui, Qiusheng He, Lili Guo, Xueying Gao, Yanli Feng, Yuhang Wang, Xinming Wang. Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China. Atmosphere. 2021; 12 (4):510.

Chicago/Turabian Style

Zeqian Liu; Yang Cui; Qiusheng He; Lili Guo; Xueying Gao; Yanli Feng; Yuhang Wang; Xinming Wang. 2021. "Seasonal Variations of Carbonyls and Their Contributions to the Ozone Formation in Urban Atmosphere of Taiyuan, China." Atmosphere 12, no. 4: 510.

Technical note
Published: 12 April 2021 in Atmospheric Chemistry and Physics
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Size and effective density (ρe) are important properties of aerosol particles and are related to their influences on human health and the global climate. The volume equivalent diameter (Dve) is an intrinsic property that is used to evaluate particle size. Three definitions of ρe are generally used to characterize the physical property of a particle as an alternative to particle density, in which only the ρeII, defined as the ratio of particle density (ρp) to a dynamic shape factor (χ), has the characteristic of being independent of particle size. However, it is still challenging to simultaneously characterize the Dve and ρeII of aspherical particles. Here, we present a novel system that classifies particles with their aerodynamic diameter (Da) by aerodynamic aerosol classifier (AAC) and determines their vacuum aerodynamic diameter (Dva) by single-particle aerosol mass spectrometry (SPAMS) to achieve a measurement of Dve and ρeII. The reliability of the AAC-SPAMS system for accurately obtaining Dve and ρeII is verified based on the result that the deviation between the measured and theoretical values is less than 6 % for the size-resolved spherical polystyrene latex (PSL). The AAC-SPAMS system was applied to characterize the Dve and ρeII of (NH4)2SO4 and NaNO3 particles, suggesting that these particles are aspherical and their ρeII is independent of particle size. Finally, the AAC-SPAMS system was deployed in a field measurement, showing that it is a powerful technique to characterize the chemically resolved Dve and ρeII of particles in real time.

ACS Style

Long Peng; Lei Li; Guohua Zhang; Xubing Du; Xinming Wang; Ping'an Peng; Guoying Sheng; Xinhui Bi. Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS. Atmospheric Chemistry and Physics 2021, 21, 5605 -5613.

AMA Style

Long Peng, Lei Li, Guohua Zhang, Xubing Du, Xinming Wang, Ping'an Peng, Guoying Sheng, Xinhui Bi. Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS. Atmospheric Chemistry and Physics. 2021; 21 (7):5605-5613.

Chicago/Turabian Style

Long Peng; Lei Li; Guohua Zhang; Xubing Du; Xinming Wang; Ping'an Peng; Guoying Sheng; Xinhui Bi. 2021. "Technical note: Measurement of chemically resolved volume equivalent diameter and effective density of particles by AAC-SPAMS." Atmospheric Chemistry and Physics 21, no. 7: 5605-5613.

Preprint content
Published: 26 March 2021
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Intermediate-volatility organic compounds (IVOCs) emitted from vehicles are important precursors to secondary organic aerosols (SOA) in urban areas, yet vehicular emission of IVOCs, particularly from on-road fleets, is poorly understood. Here we initiated a field campaign to collect IVOCs with sorption tubes at both the inlet and the outlet in a busy urban tunnel (>30,000 vehicles per day) in south China for characterizing emissions of IVOCs from on-road vehicles. The average emission factor of IVOCs (EFIVOCs) was measured to be 16.77 ± 0.89 mg km-1 (Average ± 95% C.I.) for diesel and gasoline vehicles in the fleets, and based on linear regression the average EFIVOCs was derived to be 62.79 ± 18.37 mg km-1 for diesel vehicles and 13.95 ± 1.13 mg km-1 for gasoline vehicles. The EFIVOCs for diesel vehicles from this study was comparable to that reported previously for non-road engines without after-treatment facilities, while the EFIVOCs for gasoline vehicles from this study was much higher than that recently tested for a China V gasoline vehicle. IVOCs from the on-road fleets did not show significant correlation with the primary organic aerosol (POA) or total non-methane hydrocarbons (NMHCs) as results from previous chassis dynamometer tests. Estimated SOA production from the vehicular IVOCs and VOCs surpassed the POA by a factor of ~ 2.4, and IVOCs dominated over VOCs in estimated SOA production by a factor of ~ 7, suggesting that controlling IVOCs is of greater importance to modulate traffic-related OA in urban areas. The results demonstrated that although on-road gasoline vehicles have much lower EFIVOCs, they contribute more IVOCs than on-road diesel vehicles due to its dominance in the on-road fleets. However, due to greater diesel than gasoline fuel consumption in China, emission of IVOCs from diesel engines would be much larger than that from gasoline engines, signaling the overwhelming contribution of IVOC emissions by non-road diesel engines in China.

ACS Style

Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel. 2021, 2021, 1 -33.

AMA Style

Hua Fang, Xiaoqing Huang, Yanli Zhang, Chenglei Pei, Zuzhao Huang, Yujun Wang, Yanning Chen, Jianhong Yan, Jianqiang Zeng, Shaoxuan Xiao, Shilu Luo, Sheng Li, Jun Wang, Ming Zhu, Xuewei Fu, Zhenfeng Wu, Runqi Zhang, Wei Song, Guohua Zhang, Weiwei Hu, Mingjin Tang, Xiang Ding, Xinhui Bi, Xinming Wang. Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel. . 2021; 2021 ():1-33.

Chicago/Turabian Style

Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. 2021. "Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel." 2021, no. : 1-33.

Preprint content
Published: 26 March 2021
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Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. Supplementary material to "Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel". 2021, 1 .

AMA Style

Hua Fang, Xiaoqing Huang, Yanli Zhang, Chenglei Pei, Zuzhao Huang, Yujun Wang, Yanning Chen, Jianhong Yan, Jianqiang Zeng, Shaoxuan Xiao, Shilu Luo, Sheng Li, Jun Wang, Ming Zhu, Xuewei Fu, Zhenfeng Wu, Runqi Zhang, Wei Song, Guohua Zhang, Weiwei Hu, Mingjin Tang, Xiang Ding, Xinhui Bi, Xinming Wang. Supplementary material to "Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel". . 2021; ():1.

Chicago/Turabian Style

Hua Fang; Xiaoqing Huang; Yanli Zhang; Chenglei Pei; Zuzhao Huang; Yujun Wang; Yanning Chen; Jianhong Yan; Jianqiang Zeng; Shaoxuan Xiao; Shilu Luo; Sheng Li; Jun Wang; Ming Zhu; Xuewei Fu; Zhenfeng Wu; Runqi Zhang; Wei Song; Guohua Zhang; Weiwei Hu; Mingjin Tang; Xiang Ding; Xinhui Bi; Xinming Wang. 2021. "Supplementary material to "Measurement report: Emissions of intermediate-volatility organic compounds from vehicles under real-world driving conditions in an urban tunnel"." , no. : 1.