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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.
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 StyleJuqin 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 StyleJuqin 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.
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.
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 StyleHua 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 StyleHua 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.
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.
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 StyleChao 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 StyleChao 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.
The isotope tracer technique plays a key role in identifying the sources and atmospheric processes affecting pollution. The sources of brown carbon (BrC) at Guangzhou during 2017–2018 were characterized by positive matrix factorization with radiocarbon isotope constraints and multiple linear regression analysis. The primary emission factors of fossil fuel combustion (FF) and biomass burning (BB) accounted for 34% and 27% of dissolved BrC absorption at λ = 365 nm (Abs365), respectively. The total mean light absorption contributed by secondary sources was 39%. The FF‐origin Abs365 changed insignificantly throughout the year and was dominant in the summer monsoon period, whereas the Abs365 from BB and secondary nitrate formation increased and contributed larger fractions during the winter monsoon period. Transported BrC was estimated using an index of 7Be/(7Be + n210Pb). Higher values were generally accompanied by lower Abs365, whereas lower values were associated with higher Abs365, indicating that BrC absorption of aerosols transported from the upper‐atmosphere is lower than that of aerosols transported near the surface. Based on the positive correlations between 210Pb and Abs365 and non‐fossil dissolved organic carbon in the winter monsoon period, we estimated that the contribution of invasive BrC (include ground and upper‐atmosphere level) to total absorption during the period of elevated BrC was ∼50%. The transported BrC was likely related to BB organic aerosols and secondary nitrate formation processes. This study supports radionuclides as a novel method for characterizing the sources and transport of BrC that can be applied in future atmospheric research.
Hongxing Jiang; Jun Li; Rong Sun; Guoqing Liu; Chongguo Tian; Jiao Tang; Zhineng Cheng; SanYuan Zhu; Guangcai Zhong; Xiang Ding; Gan Zhang. Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling. Journal of Geophysical Research: Atmospheres 2021, 126, 1 .
AMA StyleHongxing Jiang, Jun Li, Rong Sun, Guoqing Liu, Chongguo Tian, Jiao Tang, Zhineng Cheng, SanYuan Zhu, Guangcai Zhong, Xiang Ding, Gan Zhang. Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling. Journal of Geophysical Research: Atmospheres. 2021; 126 (9):1.
Chicago/Turabian StyleHongxing Jiang; Jun Li; Rong Sun; Guoqing Liu; Chongguo Tian; Jiao Tang; Zhineng Cheng; SanYuan Zhu; Guangcai Zhong; Xiang Ding; Gan Zhang. 2021. "Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling." Journal of Geophysical Research: Atmospheres 126, no. 9: 1.
Difference and uncertainty of the aerosol radiative effects were quantified using the Santa Barbara DISORT Atmospheric Radiative Transfer (SBDART) model and multiple aerosol observation datasets from urban‐forest transition region. The secondary transformed carbonaceous aerosol components and biogenic secondary organic aerosol (BSOA) tracers have dominated over all other components (with a higher concentration in wet season) in terms of its impact on the ARF. The averaged organic carbon (OC) and BSOA tracers increased from 13.3±4.99 μg/m3, 29.5±10.7 ng·m‐3 to 17.3±4.47 μg/m3, 78.7±43.7 ng·m‐3 in the dry and wet seasons, respectively. The corresponding RMSE of single scattering albedo (SSA) and radiative forcing at the top of the atmosphere (TOA) have increased by 8.4% and 16.9%. From the dry season to the wet season, the drastically aerosol composition and types variations caused the aerosol radiation effect reverse from cooling to heating. The increase in carbonaceous aerosols and BSOA transformed by forests in the wet season weakened the cooling effects. Driven by multiple factors, such as meteorological conditions, emission sources, and the mixed state of particulate matters, the transport patterns of air masses exhibit completely opposite effects to the ARF. Affected by the source location, wet deposition rate and components residence time, the uncertainty of ARF caused by long‐distance transport of aerosols is 68% higher than that of local aerosol situations under the condition of similar aerosol composition distributions. At similar transport distances, stronger aerosol secondary transformation increases the uncertainty of ARF by 20%.
Yining Ma; Jinyuan Xin; Wenyu Zhang; Chongshui Gong; Tianxue Wen; Xiaoyan Wu; Yuesi Wang; Lili Wang; Fangkun Wu; Xiang Ding. Uncertainties of Simulated Aerosol Direct Radiative Effect Induced by Aerosol Chemical Components: A Measurement‐Based Perspective From Urban‐Forest Transition Region in East China. Journal of Geophysical Research: Atmospheres 2021, 126, 1 .
AMA StyleYining Ma, Jinyuan Xin, Wenyu Zhang, Chongshui Gong, Tianxue Wen, Xiaoyan Wu, Yuesi Wang, Lili Wang, Fangkun Wu, Xiang Ding. Uncertainties of Simulated Aerosol Direct Radiative Effect Induced by Aerosol Chemical Components: A Measurement‐Based Perspective From Urban‐Forest Transition Region in East China. Journal of Geophysical Research: Atmospheres. 2021; 126 (8):1.
Chicago/Turabian StyleYining Ma; Jinyuan Xin; Wenyu Zhang; Chongshui Gong; Tianxue Wen; Xiaoyan Wu; Yuesi Wang; Lili Wang; Fangkun Wu; Xiang Ding. 2021. "Uncertainties of Simulated Aerosol Direct Radiative Effect Induced by Aerosol Chemical Components: A Measurement‐Based Perspective From Urban‐Forest Transition Region in East China." Journal of Geophysical Research: Atmospheres 126, no. 8: 1.
Secondary atmospheric pollutants are an important component of the particles found in Urumqi city, China, Further, secondary inorganic aerosols, in particular, increase significantly during the winter heating period. In this study, samples collected from October 2017 to August 2018 from Urumqi were analyzed. Results showed that the average concentration of water-soluble inorganic ions (WSIs) in the heating period (86.9 ± 31.1 μg·m−3) was significantly higher than that in the non-heating period (14.1 ± 8.67 μg·m−3). SNA (SO42−, NO3−, NH4+) accounted for 90.7% of the total WSIs (TWSIs) in the heating period. Simulations revealed that the in situ pH (3.1) was higher in the heating period than that in non-heating period (0.66) when they were calculated by the aerosol thermodynamic model. The particles were found to be acidity during the entire period. The liquid water content of the particulates (LWC) was found to higher in the heating period (55.5 ± 51.8 μg·m−3) than the non-heating period (21.3 ± 40.3 μg·m−3). The average nitrogen oxidation rate (NOR) and sulfur oxidation rate (SOR) were 0.16 and 0.36, respectively, indicating a significant secondary formation of nitrate and sulfate in the atmosphere of Urumqi. Further analysis indicated that sulfate was significantly affected by the LWC and acidity of the particulates; nitrate was produced under ammonia-rich conditions in Urumqi, and the LWC facilitated the production of nitrate. This study provides information about the formation of secondary sulfate and nitrate aerosols during different periods in suburban Urumqi.
Huibin Liu; Dilinuer Talifu; Xiang Ding; Xinming Wang; Abulikemu Abulizi; Yalkunjan Tursun; Juqin An; Wei Wang; Xiaoxiao Zhang; Yuanyu Zhang. Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China. Atmospheric Research 2021, 260, 105622 .
AMA StyleHuibin Liu, Dilinuer Talifu, Xiang Ding, Xinming Wang, Abulikemu Abulizi, Yalkunjan Tursun, Juqin An, Wei Wang, Xiaoxiao Zhang, Yuanyu Zhang. Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China. Atmospheric Research. 2021; 260 ():105622.
Chicago/Turabian StyleHuibin Liu; Dilinuer Talifu; Xiang Ding; Xinming Wang; Abulikemu Abulizi; Yalkunjan Tursun; Juqin An; Wei Wang; Xiaoxiao Zhang; Yuanyu Zhang. 2021. "Particles liquid water and acidity determine formation of secondary inorganic ions in Urumqi, NW China." Atmospheric Research 260, no. : 105622.
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.
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 StyleHua 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 StyleHua 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.
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 StyleHua 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 StyleHua 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.
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. Supplementary material to "Interactions of organosulfates with water vapor under sub- and supersaturated conditions". 2021, 1 .
AMA StyleChao 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. Supplementary material to "Interactions of organosulfates with water vapor under sub- and supersaturated conditions". . 2021; ():1.
Chicago/Turabian StyleChao 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. "Supplementary material to "Interactions of organosulfates with water vapor under sub- and supersaturated conditions"." , no. : 1.
Organosulfates (OS) 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 OS with water vapor under sub- and supersaturated conditions. A vapor sorption analyzer was used to measure mass changes of OS samples with 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 3.652 ± 0.064, 3.575 ± 0.024, 1.591 ± 0.004 and 2.202 ± 0.031. 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), whereas κccn was found to be significantly larger than κgf for octyl-OS, likely due to both solubility limit and surface tension reduction.
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. 2021, 2021, 1 -31.
AMA StyleChao 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. . 2021; 2021 ():1-31.
Chicago/Turabian StyleChao 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." 2021, no. : 1-31.
Polycyclic aromatic hydrocarbons (PAHs) are toxic compounds in the atmosphere and have adverse effects on public health, especially through the inhalation of particulate matter (PM). At present, there is limited understanding of the size distribution of particulate-bound PAHs and their health risks on a continental scale. In this study, we carried out a PM campaign from October 2012 to September 2013 at 12 sampling sites simultaneously, including urban, suburban and remote sites in different regions of China. Size-segregated PAHs and typical tracers of coal combustion (picene), biomass burning (levoglucosan) and vehicle exhaust (hopanes) were measured. The annual averages of the 24 total measured PAHs (∑24PAHs) and benzo[a]pyrene (BaP) carcinogenic equivalent concentration (BaPeq) ranged from 7.56 to 205 ng/m3 with a mean of 53.5 ng/m3 and from 0.21 to 22.2 ng/m3 with a mean of 5.02 ng/m3, respectively. At all the sites, ∑24PAHs and BaPeq were dominant in the ultrafine particles with aerodynamic diameter < 1.1 µm, followed by those in the size ranges of 1.1–3.3 µm and > 3.3 µm. Compared with southern China, northern China witnessed much higher ∑24PAHs (87.36 vs. 17.56 ng/m3), BaPeq (8.48 vs. 1.34 ng/m3) and PAHs' inhalation cancer risk (7.4 × 10−4 vs. 1.2 × 10−4). Nationwide increases in both PAH levels and inhalation cancer risk occurred in winter. The unfavorable meteorological conditions and enhanced emissions of coal combustion and biomass burning together led to severe PAHs' pollution and high cancer risk in the atmosphere of northern China, especially during winter. Coal combustion is the major source of BaPeq in all size particles at most sampling sites. Our results suggested that the reduction of coal and biofuel consumption in the residential sector could be crucial and effective in lowering PAH concentrations and their inhalation cancer risk in China.
Qingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping'an Peng; Xinming Wang. Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements. Atmospheric Chemistry and Physics 2020, 20, 14581 -14595.
AMA StyleQingqing Yu, Xiang Ding, Quanfu He, Weiqiang Yang, Ming Zhu, Sheng Li, Runqi Zhang, Ruqin Shen, Yanli Zhang, Xinhui Bi, Yuesi Wang, Ping'an Peng, Xinming Wang. Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements. Atmospheric Chemistry and Physics. 2020; 20 (23):14581-14595.
Chicago/Turabian StyleQingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping'an Peng; Xinming Wang. 2020. "Nationwide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China revealed by size-segregated measurements." Atmospheric Chemistry and Physics 20, no. 23: 14581-14595.
Qingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping’An Peng; Xinming Wang. Supplementary material to "Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China". 2020, 1 .
AMA StyleQingqing Yu, Xiang Ding, Quanfu He, Weiqiang Yang, Ming Zhu, Sheng Li, Runqi Zhang, Ruqin Shen, Yanli Zhang, Xinhui Bi, Yuesi Wang, Ping’An Peng, Xinming Wang. Supplementary material to "Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China". . 2020; ():1.
Chicago/Turabian StyleQingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping’An Peng; Xinming Wang. 2020. "Supplementary material to "Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China"." , no. : 1.
Polycyclic aromatic hydrocarbons (PAHs) are toxic compounds in the atmosphere and have adverse effects on public health, especially through the inhalation of particulate matter (PM). At present, there are limited understandings in size distribution of particulate-bound PAHs and its health risk on a continental scale. In this study, we carried out a one-year PM campaign and simultaneously measured size-segregated PAHs at 12 sites across six regions of China. The annual averages of total 24 PAHs (∑24PAHs) and benzo[a]pyrene (BaP) carcinogenic equivalent concentration (BaPeq) ranged from 7.56 to 205 ng m−3 with a mean of 53.5 ng m−3 and 0.21 to 22.2 ng m−3 with a mean of 5.02 ng m−3, respectively. At all the sites, ∑24PAHs and BaPeq were dominated in the ultrafine particles with aerodynamic diameter 3.3 µm. Compared with the southern China, the northern China witnessed much higher ∑24PAHs (87.36 ng m−3 vs. 17.56 ng m−3), BaPeq (8.48 ng m−3 vs. 1.34 ng m−3) and PAHs inhalation cancer risk (7.4 × 10−4 vs. 1.2 × 10−4). Nationwide increases in both PAH levels and inhalation cancer risk occurred in winter. The unfavorable meteorological conditions and enhanced emissions of coal combustion and biomass burning together led to severe PAHs pollution and high cancer risk in the atmosphere of the northern China, especially during winter. Our results suggested that the reduction of coal and biofuel consumption in the residential sector could be crucial and effective to lower PAH concentrations and its inhalation cancer risk in China.
Qingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping’An Peng; Xinming Wang. Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China. 2020, 2020, 1 -43.
AMA StyleQingqing Yu, Xiang Ding, Quanfu He, Weiqiang Yang, Ming Zhu, Sheng Li, Runqi Zhang, Ruqin Shen, Yanli Zhang, Xinhui Bi, Yuesi Wang, Ping’An Peng, Xinming Wang. Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China. . 2020; 2020 ():1-43.
Chicago/Turabian StyleQingqing Yu; Xiang Ding; Quanfu He; Weiqiang Yang; Ming Zhu; Sheng Li; Runqi Zhang; Ruqin Shen; Yanli Zhang; Xinhui Bi; Yuesi Wang; Ping’An Peng; Xinming Wang. 2020. "Nation wide increase of polycyclic aromatic hydrocarbons in ultrafine particles during winter over China." 2020, no. : 1-43.
Research has focused on the impacts of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere due to their potential carcinogenicity. In this study, we investigated the seasonal variation, sources, incremental lifetime cancer risks (ILCRS), and vitro DNA oxidative damage of PAHs in Urumqi in NW China. A total of 72 atmospheric samples from Urumqi were collected over a year (September 2017–September 2018) and were analyzed for 16 PAHs that are specifically prioritized by the U.S Environmental Protection Agency (U·S EPA). The highest PAHs concentrations were in winter (1032.66 ng m−3) and lowest in spring (146.00 ng m−3). Middle molecular weight PAHs with four rings were the most abundant species (45.28–61.19% of the total). The results of the diagnostic ratio and positive matrix factorization inferred that the major sources of atmospheric PAHs in Urumqi were biomass burning, coking, and petrogenic sources (52.9%), traffic (30.1%), coal combustion (8.9%), and the plastics recycling industry (8.1%). ILCRS assessment and Monte Carlo simulations suggested that for all age groups PAHs cancer risks were mainly associated with ingestion and dermal contact and inhalation was negligible. The plasmid scission assay results showed a positive dose-response relationship between PAHs concentrations and DNA damage rates, demonstrating that toxic PAHs was the primary cause for PM2.5-induced DNA damage in the air of Urumqi.
Wei Wang; Xiang Ding; Yusan Turap; Yalkunjan Tursun; Abulikemu Abulizi; Xingming Wang; Longyi Shao; Dilinuer Talifu; Juqin An; Xiaoxiao Zhang; Yuanyu Zhang; Huibin Liu. Distribution, sources, risks, and vitro DNA oxidative damage of PM2.5-bound atmospheric polycyclic aromatic hydrocarbons in Urumqi, NW China. Science of The Total Environment 2020, 739, 139518 .
AMA StyleWei Wang, Xiang Ding, Yusan Turap, Yalkunjan Tursun, Abulikemu Abulizi, Xingming Wang, Longyi Shao, Dilinuer Talifu, Juqin An, Xiaoxiao Zhang, Yuanyu Zhang, Huibin Liu. Distribution, sources, risks, and vitro DNA oxidative damage of PM2.5-bound atmospheric polycyclic aromatic hydrocarbons in Urumqi, NW China. Science of The Total Environment. 2020; 739 ():139518.
Chicago/Turabian StyleWei Wang; Xiang Ding; Yusan Turap; Yalkunjan Tursun; Abulikemu Abulizi; Xingming Wang; Longyi Shao; Dilinuer Talifu; Juqin An; Xiaoxiao Zhang; Yuanyu Zhang; Huibin Liu. 2020. "Distribution, sources, risks, and vitro DNA oxidative damage of PM2.5-bound atmospheric polycyclic aromatic hydrocarbons in Urumqi, NW China." Science of The Total Environment 739, no. : 139518.
Volatile organic compounds (VOCs) play a crucial role in modulating air pollution by ozone and fine particles, particularly in urban areas. While in recent years short-term intervention actions for better air quality during big events in China did present good opportunities to examine the effectiveness of control measures in reducing anthropogenic VOCs emission, it is highly challenging to interpret the real effect of a specific control measure based on field monitoring data when a cocktail of control measures were adopted. Here we took the air quality intervention actions during the 16th Asian Games (AG) in Guangzhou as a case study to explore the impact of short-term multiple measures on VOCs reduction. The average mass concentrations of VOCs decreased by 52–68% during the AG. These percentages could not reflect emission reduction rates as the concentration might be also heavily impacted by dispersion conditions. Diagnostic ratios, such as methyl tert-butyl ether to carbon monoxide (MTBE/CO) and i-pentane/CO, decreased by over 60% during the AG, suggesting a substantial reduction in gasoline related emissions. A method linking emission reduction rates of two sources with their contribution percentages before and during the AG by using a receptor model was further formulated. With the available reduction rate of 34% for vehicular exhaust obtained during the traffic restriction drill in our previous study, VOCs emissions from gasoline evaporation and solvent use reduced by 45.7% and 13.6% during the AG, respectively. Total VOCs emissions decreased by 25.3% on average during the AG, and the emission control of vehicular exhaust, oil evaporation, and solvent use accounted for 17.0%, 6.3% and 2.0% of total VOCs emission reduction, respectively. This study presented an observed-based method with diagnostic/quantitative approaches to single out the effectiveness of each control measures in reducing VOCs emissions.
Xinyu Huang; Yanli Zhang; Yujun Wang; Yubo Ou; Duohong Chen; Chenglei Pei; Zuzhao Huang; Zhou Zhang; Tengyu Liu; Shilu Luo; Xiaoqing Huang; Wei Song; Xiang Ding; Min Shao; Shichun Zou; Xinming Wang. Evaluating the effectiveness of multiple emission control measures on reducing volatile organic compounds in ambient air based on observational data: A case study during the 2010 Guangzhou Asian Games. Science of The Total Environment 2020, 723, 138171 .
AMA StyleXinyu Huang, Yanli Zhang, Yujun Wang, Yubo Ou, Duohong Chen, Chenglei Pei, Zuzhao Huang, Zhou Zhang, Tengyu Liu, Shilu Luo, Xiaoqing Huang, Wei Song, Xiang Ding, Min Shao, Shichun Zou, Xinming Wang. Evaluating the effectiveness of multiple emission control measures on reducing volatile organic compounds in ambient air based on observational data: A case study during the 2010 Guangzhou Asian Games. Science of The Total Environment. 2020; 723 ():138171.
Chicago/Turabian StyleXinyu Huang; Yanli Zhang; Yujun Wang; Yubo Ou; Duohong Chen; Chenglei Pei; Zuzhao Huang; Zhou Zhang; Tengyu Liu; Shilu Luo; Xiaoqing Huang; Wei Song; Xiang Ding; Min Shao; Shichun Zou; Xinming Wang. 2020. "Evaluating the effectiveness of multiple emission control measures on reducing volatile organic compounds in ambient air based on observational data: A case study during the 2010 Guangzhou Asian Games." Science of The Total Environment 723, no. : 138171.
Driving conditions are among the important factors determining gasoline vehicle emissions, yet their relation with exhaust-derived secondary pollutants is poorly understood. Here, we introduced exhaust from a gasoline vehicle under hot idling and cruising conditions into an indoor smog chamber by using a chassis dynamometer and investigated the formation of secondary organic aerosols (SOA) during photochemical ageing under light after characterizing the primary emission of non-methane hydrocarbons (NMHCs), nitrogen oxide (NOx) and primary organic aerosol (POA) in the dark. When compared to emission factors (EFs) at idling, during cruising at 20 km h−1 or 40 km h−1, the EFs of NMHCs decreased by more than an order of magnitude, while the EFs of NOx were more than doubled, resulting in a large drop in the NMHC-to-NOx ratios. The percentages of reactive alkenes and aromatic hydrocarbons also decreased from idling to cruising at 20 km h−1 to that at 40 km h−1. The emission factor of benzene, a carcinogenic compound, decreased more than 10 times from ~0.35 g kg-fuel−1 at idling to ~0.03 g kg-fuel−1 during cruising. During photochemical ageing of exhaust, substantial SOA was formed, and the SOA/POA ratios decreased from 52 to 92 at idling to 4–14 during cruising. Traditional aromatics could explain 30–64% of the measured SOA at idling but less than 15% of the measured SOA during cruising. Our results highlight that traffic congestion would greatly promote the emission of reactive volatile organic compounds and carcinogenic benzene from gasoline vehicles and also show that NMHCs as a target in gasoline vehicle emission tests cannot effectively represent the SOA and ozone formation potentials of the partially oxidized hydrocarbons from poorly functioning converters.
Yanli Zhang; Wei Deng; Qihou Hu; Zhenfeng Wu; Weiqiang Yang; Huina Zhang; Zhaoyi Wang; Zheng Fang; Ming Zhu; Sheng Li; Wei Song; Xiang Ding; Xinming Wang. Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing. Science of The Total Environment 2020, 722, 137934 .
AMA StyleYanli Zhang, Wei Deng, Qihou Hu, Zhenfeng Wu, Weiqiang Yang, Huina Zhang, Zhaoyi Wang, Zheng Fang, Ming Zhu, Sheng Li, Wei Song, Xiang Ding, Xinming Wang. Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing. Science of The Total Environment. 2020; 722 ():137934.
Chicago/Turabian StyleYanli Zhang; Wei Deng; Qihou Hu; Zhenfeng Wu; Weiqiang Yang; Huina Zhang; Zhaoyi Wang; Zheng Fang; Ming Zhu; Sheng Li; Wei Song; Xiang Ding; Xinming Wang. 2020. "Comparison between idling and cruising gasoline vehicles in primary emissions and secondary organic aerosol formation during photochemical ageing." Science of The Total Environment 722, no. : 137934.
Near-source measurements of smoke emissions from household stove combustion in a rural area of South China were conducted with 7 typical biomass fuels. Particulate matter samples (both PM10 and PM2.5) were analyzed for their carbonaceous components, including organic and elemental carbon (OC, EC) as well as levoglucosan (molecular tracer of biomass burning), employing thermal-optical and GC-MS analysis. The OC and EC content in PM2.5 and PM10 smoke particles derived from the various types of vegetation showed different patterns with the smallest values observed for straw type fuels. The OC/EC ratios in PM2.5 and PM10 showed an order of straw > hardwood > bamboo > softwood. Mass concentrations of particulate matter emitted from rice straw burning were highest with 12.23 ± 0.87 mg/m3 (PM10) and 9.31 ± 0.81 mg/m3 (PM2.5), while the mass ratios (LG/PM and OC/PM) were lowest among the 7 fuels, indicating that particle emissions from straw burning were higher than those from woody fuels, using similar burning conditions. The levoglucosan emission ratios were rather high and this single most abundant organic species was mainly present in the fine particle mode. Linear correlation analysis showed a strong relationship between levoglucosan and EC emissions.
Xuefang Sang-Arlt; Haoxiang Fu; Yinan Zhang; Xiang Ding; Xinming Wang; Yanan Zhou; Lilin Zou; Georg F. Zellmer; Guenter Engling. Carbonaceous Aerosol Emitted from Biofuel Household Stove Combustion in South China. Atmosphere 2020, 11, 112 .
AMA StyleXuefang Sang-Arlt, Haoxiang Fu, Yinan Zhang, Xiang Ding, Xinming Wang, Yanan Zhou, Lilin Zou, Georg F. Zellmer, Guenter Engling. Carbonaceous Aerosol Emitted from Biofuel Household Stove Combustion in South China. Atmosphere. 2020; 11 (1):112.
Chicago/Turabian StyleXuefang Sang-Arlt; Haoxiang Fu; Yinan Zhang; Xiang Ding; Xinming Wang; Yanan Zhou; Lilin Zou; Georg F. Zellmer; Guenter Engling. 2020. "Carbonaceous Aerosol Emitted from Biofuel Household Stove Combustion in South China." Atmosphere 11, no. 1: 112.
Secondary organic aerosol (SOA) formation from biogenic precursors is affected by anthropogenic emissions, which are not well understood in polluted areas. In this study, we accomplished a year-round campaign at nine sites in polluted areas located in the Pearl River Delta (PRD) region during 2015. We measured typical biogenic SOA (BSOA) tracers from isoprene, monoterpenes, and β-caryophyllene, as well as major gaseous and particulate pollutants and investigated the impact of anthropogenic pollutants on BSOA formation. The concentrations of BSOA tracers were in the range of 45.4 to 109 ng m−3 with the majority composed of products from monoterpenes (SOAM, 47.2±9.29 ng m−3), isoprene (SOAI, 23.1±10.8 ng m−3), and β-caryophyllene (SOAC, 3.85±1.75 ng m−3). We found that atmospheric oxidants, Ox (O3 plus NO2), and sulfate correlated well with later-generation SOAM tracers, but this was not the case for first-generation SOAM products. This suggested that high Ox and sulfate levels could promote the formation of later-generation SOAM products, which probably led to the relatively aged SOAM that we observed in the PRD. For the SOAI tracers, both 2-methylglyceric acid (NO/NO2-channel product) and the ratio of 2-methylglyceric acid to 2-methyltetrols (HO2-channel products) exhibit NOx dependence, indicating the significant impact of NOx on SOAI formation pathways. The SOAC tracer was elevated in winter at all sites and was positively correlated with levoglucosan, Ox, and sulfate. Thus, the unexpected increase in SOAC in wintertime might be highly associated with the enhancement of biomass burning, O3 chemistry, and the sulfate component in the PRD. The BSOAs that were estimated using the SOA tracer approach showed the highest concentration in fall and the lowest concentration in spring with an annual average concentration of 1.68±0.40 µg m−3. SOAM dominated the BSOA mass all year round. We also found that BSOA correlated well with sulfate and Ox. This implied a significant effect from anthropogenic pollutants on BSOA formation and highlighted that we could reduce BSOA by controlling the anthropogenic emissions of sulfate and Ox precursors in polluted regions.
Yu-Qing Zhang; Duo-Hong Chen; Xiang Ding; Jun Li; Tao Zhang; Jun-Qi Wang; Qian Cheng; Hao Jiang; Wei Song; Yu-Bo Ou; Peng-Lin Ye; Gan Zhang; Xin-Ming Wang. Impact of anthropogenic emissions on biogenic secondary organic aerosol: observation in the Pearl River Delta, southern China. Atmospheric Chemistry and Physics 2019, 19, 14403 -14415.
AMA StyleYu-Qing Zhang, Duo-Hong Chen, Xiang Ding, Jun Li, Tao Zhang, Jun-Qi Wang, Qian Cheng, Hao Jiang, Wei Song, Yu-Bo Ou, Peng-Lin Ye, Gan Zhang, Xin-Ming Wang. Impact of anthropogenic emissions on biogenic secondary organic aerosol: observation in the Pearl River Delta, southern China. Atmospheric Chemistry and Physics. 2019; 19 (22):14403-14415.
Chicago/Turabian StyleYu-Qing Zhang; Duo-Hong Chen; Xiang Ding; Jun Li; Tao Zhang; Jun-Qi Wang; Qian Cheng; Hao Jiang; Wei Song; Yu-Bo Ou; Peng-Lin Ye; Gan Zhang; Xin-Ming Wang. 2019. "Impact of anthropogenic emissions on biogenic secondary organic aerosol: observation in the Pearl River Delta, southern China." Atmospheric Chemistry and Physics 19, no. 22: 14403-14415.
We measured volatile organic compounds (VOCs) during the heating, non-heating, and sandstorm periods in the air of the Dushanzi district in NW China and investigated their concentrations, chemical reactivity, and sources. The observed concentrations of total VOCs (TVOCs) were 22.35 ± 17.60, 33.20 ± 34.15, and 17.05 ± 13.61 ppbv in non-heating, heating, and sandstorm periods, respectively. C2-C5 alkanes, C2-C3 alkenes, benzene, and toluene were the most abundant species, contributing more than 60% of the TVOCs. Among these VOCs, alkenes such as propene had the highest chemical reactivity, accounting for more than 60% of total hydroxyl radical loss rate (LOH) and ozone formation potential (OFP). Chemical reactivity was the highest in the heating period. The average reaction rate constant (KOH-avg) and average maximum incremental reactivity coefficient (MIR-avg) of the total observed VOCs were (8.72 ± 1.42) × 10−12 cm3/mol∙s and 2.42 ± 0.16 mol/mol, respectively. The results of the source apportionment via the Positive Matrix Factorization (PMF) model showed that coal combustion (43.08%) and industrial processes (38.86%) were the major sources of VOCs in the air of the Dushanzi district. The contribution of coal combustion to VOCs was the highest in the heating period, while that of industrial solvents and oil volatilization was the lowest.
Xiaoxiao Zhang; Xiang Ding; Xinming Wang; Dilinuer Talifu; Guo Wang; Yanli Zhang; Abulikemu Abulizi. Volatile Organic Compounds in a Petrochemical Region in Arid of NW China: Chemical Reactivity and Source Apportionment. Atmosphere 2019, 10, 641 .
AMA StyleXiaoxiao Zhang, Xiang Ding, Xinming Wang, Dilinuer Talifu, Guo Wang, Yanli Zhang, Abulikemu Abulizi. Volatile Organic Compounds in a Petrochemical Region in Arid of NW China: Chemical Reactivity and Source Apportionment. Atmosphere. 2019; 10 (11):641.
Chicago/Turabian StyleXiaoxiao Zhang; Xiang Ding; Xinming Wang; Dilinuer Talifu; Guo Wang; Yanli Zhang; Abulikemu Abulizi. 2019. "Volatile Organic Compounds in a Petrochemical Region in Arid of NW China: Chemical Reactivity and Source Apportionment." Atmosphere 10, no. 11: 641.
Xiang Ding. Revised Supporting Information with Tracked Changes. 2019, 1 .
AMA StyleXiang Ding. Revised Supporting Information with Tracked Changes. . 2019; ():1.
Chicago/Turabian StyleXiang Ding. 2019. "Revised Supporting Information with Tracked Changes." , no. : 1.