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Guijin Su
Key Laboratory of Environmental Nanotechnology and Health Effects, and State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China

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Journal article
Published: 02 June 2021 in Applied Catalysis B: Environmental
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The high-efficiency photocatalytic debromination of hexabromocyclododecane (HBCD) as new POPs and discovery of involved mechanisms remain a challenge. Herein, challenging Pd-anchored hollow-rod-like-g-C3N4 (Pd/HR-g-C3N4) was constructed as visible-light-driven photocatalyst. Complete destruction of (±)-α, (±)-β and (±)-γ-HBCD with 92.6% bromine-removal was achieved at 60 min in optimal system of anaerobic methanol-water (70:30) mixture with 0.5% Pd/HR-g-C3N4, being superior to most studied HBCD catalytic systems. The higher photocatalytic reduction performance is contributed to enhanced photoexcited-carriers separation and more negative conduction band arising from distinctive 1D-cavity of HR-g-C3N4, and surface-atomically dispersed Pd. A never-reported degradation pathway in which hydrodebromination and addition ring-opening synergistically occur is proposed according to identified products of ten saturated chain alkanes, C12H19Br5 and C12H19Br7. Ulteriorly, hydride-transfer resulted in rapid hydrodebromination of HBCD over Pd/HR-g-C3N4, where H chiefly derives from methanol instead of water although they synergistically promoted e- utilization. This provided a valuable sight into the cost-effective pollution-removal of HBCD.

ACS Style

Mingge Wu; Qianqian Li; Cheng Chen; Guijin Su; Maoyong Song; Bohua Sun; Jing Meng; Bin Shi. Constructed palladium-anchored hollow-rod-like graphitic carbon nitride created rapid visible-light-driven debromination of hexabromocyclododecane. Applied Catalysis B: Environmental 2021, 297, 120409 .

AMA Style

Mingge Wu, Qianqian Li, Cheng Chen, Guijin Su, Maoyong Song, Bohua Sun, Jing Meng, Bin Shi. Constructed palladium-anchored hollow-rod-like graphitic carbon nitride created rapid visible-light-driven debromination of hexabromocyclododecane. Applied Catalysis B: Environmental. 2021; 297 ():120409.

Chicago/Turabian Style

Mingge Wu; Qianqian Li; Cheng Chen; Guijin Su; Maoyong Song; Bohua Sun; Jing Meng; Bin Shi. 2021. "Constructed palladium-anchored hollow-rod-like graphitic carbon nitride created rapid visible-light-driven debromination of hexabromocyclododecane." Applied Catalysis B: Environmental 297, no. : 120409.

Journal article
Published: 01 February 2021 in Sustainability
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With the steady advancement of the United Nations Sustainable Development Goals (SDGs), how to build a sustainable environment for human settlements has become a hot topic of research for scholars from various countries. Rational space utilization and resource allocation are the keys to enhancing human well-being and achieving sustainable human settlements. A comprehensive human settlement environment evaluation system, which includes 14 indicators from the natural environment, infrastructure, and public services, was established in this study. The results showed that the habitat suitability area only accounted for 1.61% (2.05% after removing the nature reserve) and all centered on cities and radiated to the surrounding areas. A belt-like suitability distribution pattern of “Yi Jiang Liang He” (i.e., Brahmaputra, Lhasa, and Nianchu Rivers) is formed, and a point-like suitability distribution pattern of the Chamdo Karub District, Nagqu Seni District, and Ngari Shiquanhe Town are formed. The results of the driving factor analysis indicate that the level of public health development in infrastructure and various indicators in public services are the main factors influencing human settlement. There is not much difference in the natural environment in the populated regions, so the suitability of the natural environment is not a significant driving factor. In addition, the reliability of the assessment results was verified by a questionnaire survey of residents in the three regions, and the subjective satisfaction of the residents agreed with the ranking results of the objective evaluation. The evaluation results of this study provide theoretical and directional guidance for the improvement of human settlements on the Qinghai–Tibet Plateau. It will be a useful tool for evaluating human settlements in the region and has a reference significance for the formulation of macro-policy in high-altitude regions.

ACS Style

Yanpeng Ding; Bin Shi; Guijin Su; Qianqian Li; Jing Meng; Yongjian Jiang; Yi Qin; Lingwen Dai; Shuai Song. Assessing Suitability of Human Settlements in High-Altitude Area Using a Comprehensive Index Method: A Case Study of Tibet, China. Sustainability 2021, 13, 1485 .

AMA Style

Yanpeng Ding, Bin Shi, Guijin Su, Qianqian Li, Jing Meng, Yongjian Jiang, Yi Qin, Lingwen Dai, Shuai Song. Assessing Suitability of Human Settlements in High-Altitude Area Using a Comprehensive Index Method: A Case Study of Tibet, China. Sustainability. 2021; 13 (3):1485.

Chicago/Turabian Style

Yanpeng Ding; Bin Shi; Guijin Su; Qianqian Li; Jing Meng; Yongjian Jiang; Yi Qin; Lingwen Dai; Shuai Song. 2021. "Assessing Suitability of Human Settlements in High-Altitude Area Using a Comprehensive Index Method: A Case Study of Tibet, China." Sustainability 13, no. 3: 1485.

Review
Published: 07 June 2020 in Environmental Pollution
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Persistent organic pollutants (POPs) have gained heightened attentions in recent years owing to their persistent property and hazard influence on wild life and human beings. Removal of POPs using varieties of multifunctional materials have shown a promising prospect compared with conventional treatments. Herein, three main categories, including thermal degradation, electrochemical remediation, as well as photocatalytic degradation with the use of diverse catalytic materials, especially the recently developed prominent ones were comprehensively reviewed. Kinetic analysis and underlying mechanism for various POPs degradation processes were addressed in detail. The review also systematically documented how catalytic performance was dramatically affected by the nature of the material itself, the structure of target pollutants, reaction conditions and treatment techniques. Moreover, the future challenges and prospects of POPs degradation by means of multiple multifunctional materials were outlined accordingly. Knowing this is of immense significance to enhance our understanding of POPs remediation procedures and promote the development of novel multifunctional materials.

ACS Style

Bohua Sun; Qianqian Li; Minghui Zheng; Guijin Su; Shijing Lin; Mingge Wu; Chuanqi Li; Qingliang Wang; Yuming Tao; Lingwen Dai; Yi Qin; Bowen Meng. Recent advances in the removal of persistent organic pollutants (POPs) using multifunctional materials:a review. Environmental Pollution 2020, 265, 114908 .

AMA Style

Bohua Sun, Qianqian Li, Minghui Zheng, Guijin Su, Shijing Lin, Mingge Wu, Chuanqi Li, Qingliang Wang, Yuming Tao, Lingwen Dai, Yi Qin, Bowen Meng. Recent advances in the removal of persistent organic pollutants (POPs) using multifunctional materials:a review. Environmental Pollution. 2020; 265 ():114908.

Chicago/Turabian Style

Bohua Sun; Qianqian Li; Minghui Zheng; Guijin Su; Shijing Lin; Mingge Wu; Chuanqi Li; Qingliang Wang; Yuming Tao; Lingwen Dai; Yi Qin; Bowen Meng. 2020. "Recent advances in the removal of persistent organic pollutants (POPs) using multifunctional materials:a review." Environmental Pollution 265, no. : 114908.

Journal article
Published: 05 March 2020 in Science of The Total Environment
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Understanding the photochemical reaction process between VOCs and co-pollutants in the troposphere is crucial for controlling the haze. The photochemical reactions of 1,3-butadiene (1,3-BD) with NO were carried out at 308 K for up to 96 h in clean air with various relative humidity (RH) values, and actual haze atmosphere. In the haze, the representative pseudo-first-order kinetic rate constants of the 1,3-BD-NO system was 1.53 time higher than those in dry clean air. The effect of the RH (0%-80%) on the conversion behavior of the 1,3-BD-NO system in clean air was studied, revealing that increasing RH promoted the photochemical reaction in the low range of 0%-40% but retarded it in the high range of 40%-80%. Interestingly, OH radicals were directly detected under different RH values, and the strongest OH signal was obtained at an RH of 40%. Multiple macromolecular products with carbon numbers of 10-36 were identified. Unexpectedly, richer products and extended unsaturation range were detected at an RH of 40% than 0%. The photochemical products were also analyzed using ion chromatography. A reaction mechanism was proposed from the detected NO2, O3, OH, HNO2, HNO3, organic acids and macromolecular products.

ACS Style

Qingliang Wang; Qianqian Li; Da Wei; Guijin Su; Mingge Wu; Chuanqi Li; Bohua Sun; Lingwen Dai. Photochemical reactions of 1,3-butadiene with nitrogen oxide in different matrices: Kinetic behavior, humidity effect, product and mechanisms. Science of The Total Environment 2020, 721, 137747 .

AMA Style

Qingliang Wang, Qianqian Li, Da Wei, Guijin Su, Mingge Wu, Chuanqi Li, Bohua Sun, Lingwen Dai. Photochemical reactions of 1,3-butadiene with nitrogen oxide in different matrices: Kinetic behavior, humidity effect, product and mechanisms. Science of The Total Environment. 2020; 721 ():137747.

Chicago/Turabian Style

Qingliang Wang; Qianqian Li; Da Wei; Guijin Su; Mingge Wu; Chuanqi Li; Bohua Sun; Lingwen Dai. 2020. "Photochemical reactions of 1,3-butadiene with nitrogen oxide in different matrices: Kinetic behavior, humidity effect, product and mechanisms." Science of The Total Environment 721, no. : 137747.

Journal article
Published: 24 February 2020 in Science of The Total Environment
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In recent years, PM2.5 and O3 pollutions are prevalent in the atmosphere in Beijing. The study on pollution characteristics of VOC, which are important precursors of O3 and secondary organic aerosols (SOA) contributing PM2.5, is of great significance for providing a reference to guide its reduction policy formulation. Herein, the seasonal variation of atmospheric VOCs and meteorological conditions at the sampling frequency of 1 time per hour were continuously measured from March 2016 to January 2017 in Beijing. Using the collected data combined with multiple models, the role of VOCs in SOA and O3 production was investigated. Alkanes were the most abundant species, contributing 54.1–64.7% of the total VOC concentration for four seasons, followed by aromatics, alkenes and acetylene. The SOA potential (SOAP) was highest in winter at 2885.1 μg m−3, followed by autumn, spring and summer. Aromatics were the main contributors to SOAP, accounting for ~98.2% of the total SOAP during the entire observation period. The empirical kinetic modeling approach results showed that O3 production featured the VOC-limited regime in Beijing. Alkenes and aromatics were major contributors to O3 formation potential (OFP), accounting for 33.1–45.6% and 27.2–45.2%, respectively, particularly ethylene and m,p-xylene. Positive matrix factorization results indicated that motor vehicle exhaust was still the largest local source of VOCs, but its proportion was considerably reduced. The potential source contribution function results revealed that regional transport sources of VOC pollution in Beijing mainly came from the northwest and southern areas. Thus, to control PM2.5 and O3 pollution in Beijing, the restriction of alkenes and aromatics emission, accompanied by regional cooperation combined with local control, is essential.

ACS Style

Qianqian Li; Guijin Su; Chuanqi Li; Pengfei Liu; Xiaoxi Zhao; Chenglong Zhang; Xu Sun; Yujing Mu; Mingge Wu; Qingliang Wang; Bohua Sun. An investigation into the role of VOCs in SOA and ozone production in Beijing, China. Science of The Total Environment 2020, 720, 137536 .

AMA Style

Qianqian Li, Guijin Su, Chuanqi Li, Pengfei Liu, Xiaoxi Zhao, Chenglong Zhang, Xu Sun, Yujing Mu, Mingge Wu, Qingliang Wang, Bohua Sun. An investigation into the role of VOCs in SOA and ozone production in Beijing, China. Science of The Total Environment. 2020; 720 ():137536.

Chicago/Turabian Style

Qianqian Li; Guijin Su; Chuanqi Li; Pengfei Liu; Xiaoxi Zhao; Chenglong Zhang; Xu Sun; Yujing Mu; Mingge Wu; Qingliang Wang; Bohua Sun. 2020. "An investigation into the role of VOCs in SOA and ozone production in Beijing, China." Science of The Total Environment 720, no. : 137536.

Journal article
Published: 09 December 2019 in Journal of Environmental Sciences
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Volatile organic compounds (VOCs) are major contributors to air pollution. Based on the emission characteristics of 99 VOCs that daily measured at 10 am in winter from 15 December 2015 to 17 January 2016 and in summer from 21 July to 25 August 2016 in Beijing, the environmental impact and health risk of VOC were assessed. In the winter polluted days, the secondary organic aerosol formation potential (SOAP) of VOC (199.70 ± 15.05 μg/m3) was significantly higher than that on other days. And aromatics were the primary contributor (98.03%) to the SOAP during the observation period. Additionally, the result of the ozone formation potential (OFP) showed that ethylene contributed the most to OFP in winter (26.00% and 27.64% on the normal and polluted days). In summer, however, acetaldehyde was the primary contributor to OFP (22.00% and 21.61% on the normal and polluted days). Simultaneously, study showed that hazard ratios and lifetime cancer risk values of acrolein, chloroform, benzene, 1,2-dichloroethane, acetaldehyde and 1,3-butadiene exceeded the thresholds established by USEPA, thereby presenting a health risk to the residents. Besides, the ratio of toluene-to-benzene indicated that vehicle exhausts were the main source of VOC pollution in Beijing. The ratio of m-/p-xylene-to-ethylbenzene demonstrated that there were more prominent atmospheric photochemical reactions in summer than that in winter. Finally, according to the potential source contribution function (PSCF) results, compared with local pollution sources, the spread of pollution from long-distance VOCs had a greater impact on Beijing.

ACS Style

Chuanqi Li; Qianqian Li; Dongge Tong; Qingliang Wang; Mingge Wu; Bohua Sun; Guijin Su; Li Tan. Environmental impact and health risk assessment of volatile organic compound emissions during different seasons in Beijing. Journal of Environmental Sciences 2019, 93, 1 -12.

AMA Style

Chuanqi Li, Qianqian Li, Dongge Tong, Qingliang Wang, Mingge Wu, Bohua Sun, Guijin Su, Li Tan. Environmental impact and health risk assessment of volatile organic compound emissions during different seasons in Beijing. Journal of Environmental Sciences. 2019; 93 ():1-12.

Chicago/Turabian Style

Chuanqi Li; Qianqian Li; Dongge Tong; Qingliang Wang; Mingge Wu; Bohua Sun; Guijin Su; Li Tan. 2019. "Environmental impact and health risk assessment of volatile organic compound emissions during different seasons in Beijing." Journal of Environmental Sciences 93, no. : 1-12.

Journal article
Published: 03 May 2019 in Journal of Hazardous Materials
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The emission characteristics of VOCs in the rubber footwear industry (RFI) and its effect on human health are poorly understood to date. Herein, up to 68 VOCs, sorted into seven classes including alkanes, alkenes, acetylene, aromatics, halocarbons, carbon disulfide, and oxygenated VOCs, were monitored. VOCs emitted from three main processing stages of RFI, including shaping, painting and vulcanizing, were 383, 1507 and 1026 mg/m3, respectively. The top 10 VOCs contributing to the concentration and ozone formation potential were identified. Generally, alkanes were the major component emitted from three stages, contributing 48.58%–63.07% of the total VOCs. Alkenes contributed most to the OFP, accounting for 37.2%–69.1%. Based on the risk assessment, a definite cancer risk for workers in shaping workshop should be noticed. Several VOCs with a life carcinogenic risk higher than 10−4, especially benzene, bromodichloromethane, ethylbenzene and 1,1,2-trichloroethane, should be focused on. Therefore, more attention should be taken for the extended-ranges of VOCs in subordinate RFI, except for the publicly concerned aromatics in rubber industry. A VOCs emission inventory from the production process of Chinese RFI in 2000–2016 was compiled. It is estimated that Chinese RFIs have emitted a total of 319 × 104 t VOCs in those past 17 years.

ACS Style

Qianqian Li; Guijin Su; Chuanqi Li; Mengjing Wang; Li Tan; Lirong Gao; Wu Mingge; Qingliang Wang. Emission profiles, ozone formation potential and health-risk assessment of volatile organic compounds in rubber footwear industries in China. Journal of Hazardous Materials 2019, 375, 52 -60.

AMA Style

Qianqian Li, Guijin Su, Chuanqi Li, Mengjing Wang, Li Tan, Lirong Gao, Wu Mingge, Qingliang Wang. Emission profiles, ozone formation potential and health-risk assessment of volatile organic compounds in rubber footwear industries in China. Journal of Hazardous Materials. 2019; 375 ():52-60.

Chicago/Turabian Style

Qianqian Li; Guijin Su; Chuanqi Li; Mengjing Wang; Li Tan; Lirong Gao; Wu Mingge; Qingliang Wang. 2019. "Emission profiles, ozone formation potential and health-risk assessment of volatile organic compounds in rubber footwear industries in China." Journal of Hazardous Materials 375, no. : 52-60.

Journal article
Published: 07 March 2019 in Science of The Total Environment
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The new persistent organic pollutant (POP), 1,2,5,6,9,10-hexabromocyclododecane (HBCD), has been widely detected in various environmental media and proved to be biotoxic. However, the research on catalytic degradation of HBCD is in its infancy. Herein, we examined the degradation of α-HBCD, β-HBCD and γ-HBCD, over Fe3O4 micro/nanomaterial at 200 °C. The pseudo-first-order kinetic rate constants were in the range of 0.04–0.15 min−1, with half-life values of 5–19 min. γ-HBCD is slightly less stable than β-HBCD, but both of them readily convert into α-HBCD, as consistent with the Gibbs free energies of isomers themselves. The four products containing pentabromocyclododecene, two isomers of tetrabromocyclododecene and 1,5,9-cyclododecatriene were detected by conventional GC–MS. Interestingly, a high-throughput non-target product detection were performed by ESI-FT-ICR-MS, where up to 59 types of intermediate products were determined. It is tentatively proposed that different types of bromine-removed products (C12H17Br5, C12H18Br4, C12H18, C12H19Br5, C12H24 and C12H19Br5O) and cyclododecane ring-opened products (C12H19Br7, C12H20Br6O and C12H20Br6) form via elimination reaction, nucleophilic substitution, hydrodebromination and addition reaction. Besides, most of the products that were detected contained oxygen. The average carbon oxidation state (OSc¯) of the products indicate that the oxidation reaction is the dominant reaction type. Deep oxidation products, such as small molecular organic acids (formic, acetic, propionic, and butyric acids) and gas-phase oxidation products (CO2 and CO) were further detected by ion chromatography and GC-FID, respectively. This study might provide an alternative technique for the low-cost treatment of HBCD waste.

ACS Style

Mingge Wu; Yanhui Zhao; Qianqian Li; Guijin Su; Wenbin Liu; Qingliang Wang; Chuanqi Li. Thermal catalytic degradation of α-HBCD, β-HBCD and γ-HBCD over Fe3O4 micro/nanomaterial: Kinetic behavior, product analysis and mechanism hypothesis. Science of The Total Environment 2019, 668, 1200 -1212.

AMA Style

Mingge Wu, Yanhui Zhao, Qianqian Li, Guijin Su, Wenbin Liu, Qingliang Wang, Chuanqi Li. Thermal catalytic degradation of α-HBCD, β-HBCD and γ-HBCD over Fe3O4 micro/nanomaterial: Kinetic behavior, product analysis and mechanism hypothesis. Science of The Total Environment. 2019; 668 ():1200-1212.

Chicago/Turabian Style

Mingge Wu; Yanhui Zhao; Qianqian Li; Guijin Su; Wenbin Liu; Qingliang Wang; Chuanqi Li. 2019. "Thermal catalytic degradation of α-HBCD, β-HBCD and γ-HBCD over Fe3O4 micro/nanomaterial: Kinetic behavior, product analysis and mechanism hypothesis." Science of The Total Environment 668, no. : 1200-1212.

Journal article
Published: 29 November 2018 in Ecotoxicology and Environmental Safety
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In recent years, the haze incidents have occurred frequently in China. Therefore, more attention should be taken in comprehensively determination and analysis of the extended-ranges of volatile organic compounds (VOCs). Here, up to 99 non-methane VOCs (NMVOCs), including not frequently reported partial halocarbons and oxygenated VOC (OVOC) species, were monitored in atmosphere of Beijing. The mean concentration of total NMVOC (TNMVOC) decreased in the order of winter polluted days (216.05 μg m−3) > summer polluted days (127.01 μg m−3) > summer normal days (95.63 μg m−3) > winter normal days (50.25 μg m−3). The ethane to n-butane, ethylene to 1-butene, BTEX, acetaldehyde, acetone, n-hexanal, dichloromethane, chloroform and 1,2-dichloroethane, were determined to be the main composition in their respective alkane, alkene, aromatic, OVOC and halocarbon classes. The minor propylbenzene, diethylbenzene, ethyltoluene, and trimethylbenzene isomer ratios were within the narrow range of 1.3–3.21. Generally, the most abundant NMVOCs were alkanes in winter but OVOCs in summer. TNMVOC significantly positively correlated with PM10, PM2.5, CO, RH, SO2 (winter), NO2 (winter), but negatively with windspeed, SSD and PRS (winter). The opposite correlation was observed between TNMVOC and O3 in winter and summer. There was no meaningful correlation between TNMVOC and T, PRS (summer), SO2 (summer) and NO2 (summer). 3D surface graphs, built by MATLAB, were drawn to investigate the relationship between PM2.5 and NMVOC taking air quality parameters into account. The PM2.5 concentration increased non-linearly as TNMVOC concentration increased, with various surface graphs. Unlike other air quality parameters, O3 affected the relationship differently between winter and summer. The findings presented herein may provide a new train of thought for occurrence of haze.

ACS Style

Yangyang Gu; Qianqian Li; Da Wei; Lirong Gao; Li Tan; Guijin Su; Guorui Liu; Wenbin Liu; Chuanqi Li; Qingliang Wang. Emission characteristics of 99 NMVOCs in different seasonal days and the relationship with air quality parameters in Beijing, China. Ecotoxicology and Environmental Safety 2018, 169, 797 -806.

AMA Style

Yangyang Gu, Qianqian Li, Da Wei, Lirong Gao, Li Tan, Guijin Su, Guorui Liu, Wenbin Liu, Chuanqi Li, Qingliang Wang. Emission characteristics of 99 NMVOCs in different seasonal days and the relationship with air quality parameters in Beijing, China. Ecotoxicology and Environmental Safety. 2018; 169 ():797-806.

Chicago/Turabian Style

Yangyang Gu; Qianqian Li; Da Wei; Lirong Gao; Li Tan; Guijin Su; Guorui Liu; Wenbin Liu; Chuanqi Li; Qingliang Wang. 2018. "Emission characteristics of 99 NMVOCs in different seasonal days and the relationship with air quality parameters in Beijing, China." Ecotoxicology and Environmental Safety 169, no. : 797-806.

Research article
Published: 29 October 2018 in Environmental Science & Technology
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The role of regular/persistent free radicals on the catalytic activity of K+-tuned MnO2 tunnel structures is poorly understood to date. Herein, three MnO2 polymorphs (α-, β-, and δ-MnO2) were synthesized and examined toward the degradation of 1,2,4-trichlorobenzene (1,2,4-TrCBz) at 300 °C. δ-MnO2, with a two-dimensional-layered tunnel structure tuned by K+, exhibited the highest activity among the three MnO2 polymorphs. The electron spin resonance spectroscopy results confirmed that δ-MnO2 featured the most abundant reactive oxygen species (ROS: O2−•, •OH, and 1O2), followed by α-MnO2 (O2−• and 1O2), and β-MnO2 (O2−•), being supported by the calculated energy barrier. It was intriguingly noted that persistent organic free radicals, newly recognized as emerging surface-stabilized compound, were remarkably detected in α- and β-MnO2/1,2,4-TrCBz systems but not in more reactive δ-MnO2/1,2,4-TrCBz system. These might contribute to discrepant oxidative degradation process. During the oxidative process, intermediates, including benzoic acid and glycerol, formed via attack by ROS. Upon further attack, these intermediates fragmented into smaller molecules such as formic, acetic, propionic, and butyric acids. The present findings give deeper insights into the role of free radicals on the catalytic degradation of chlorinated aromatics.

ACS Style

Qianqian Li; Xinchen Huang; Guijin Su; Minghui Zheng; Chun-Hua Huang; Mengjing Wang; Chunyan Ma; Da Wei. The Regular/Persistent Free Radicals and Associated Reaction Mechanism for the Degradation of 1,2,4-Trichlorobenzene over Different MnO2 Polymorphs. Environmental Science & Technology 2018, 52, 13351 -13360.

AMA Style

Qianqian Li, Xinchen Huang, Guijin Su, Minghui Zheng, Chun-Hua Huang, Mengjing Wang, Chunyan Ma, Da Wei. The Regular/Persistent Free Radicals and Associated Reaction Mechanism for the Degradation of 1,2,4-Trichlorobenzene over Different MnO2 Polymorphs. Environmental Science & Technology. 2018; 52 (22):13351-13360.

Chicago/Turabian Style

Qianqian Li; Xinchen Huang; Guijin Su; Minghui Zheng; Chun-Hua Huang; Mengjing Wang; Chunyan Ma; Da Wei. 2018. "The Regular/Persistent Free Radicals and Associated Reaction Mechanism for the Degradation of 1,2,4-Trichlorobenzene over Different MnO2 Polymorphs." Environmental Science & Technology 52, no. 22: 13351-13360.

Journal article
Published: 23 August 2018 in Science of The Total Environment
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The lack of kinetic parameters of VOC photochemical conversion especially in the presence of NO and O3, and product information, will result in the incomplete understanding for the occurrence of haze. In the present study, the photochemical conversion of toluene, one of most significant hydrocarbons of VOCs, in toluene, toluene/NO, toluene/O3 and reaction systems was assessed for up to 4 days in a smog chamber at 278 K and 308 K. The results indicated that the addition of NO and O3 promoted the conversion of toluene. The first-order kinetic rate constants of toluene assessed in the toluene reaction system at 278 K and 308 K were 0.12 and 0.19 day−1, respectively. The second-order kinetic rate constants of toluene assessed in the toluene/NO were 0.1 × 10−13 cm3 molecule−1 day−1 (at 278 K) and 0.9 × 10−13 cm3 molecule−1 day−1 (at 308 K), and those in the toluene/O3 reaction systems were 0.06 × 10−12 cm3 molecule−1 day−1 (at 278 K) and 0.11 × 10−12 cm3 molecule−1 day−1 (at 308 K). The small difference of second-order kinetic rate constants between 278 K and 308 K obtained for the toluene/O3 system when compared with the toluene/NO system indicated the reduced reaction sensitivity of O3 to the temperature. Several dozens of large molecule products containing up to O6 heteroatoms were identified by positive ion atmospheric pressure photoionization (+APPI) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), with double bond equivalents up to 18, and carbon numbers ranging within 12–38, respectively. The findings presented herein may provide a new train of thought for the photochemical reaction process of toluene and its conversion in ambient air.

ACS Style

Yalu Liu; Qianqian Li; Guijin Su; Da Wei; Minghui Zheng; Lirong Gao; Wenbin Liu; Guorui Liu. Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by +APPI FT-ICR MS. Science of The Total Environment 2018, 649, 111 -119.

AMA Style

Yalu Liu, Qianqian Li, Guijin Su, Da Wei, Minghui Zheng, Lirong Gao, Wenbin Liu, Guorui Liu. Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by +APPI FT-ICR MS. Science of The Total Environment. 2018; 649 ():111-119.

Chicago/Turabian Style

Yalu Liu; Qianqian Li; Guijin Su; Da Wei; Minghui Zheng; Lirong Gao; Wenbin Liu; Guorui Liu. 2018. "Photochemical conversion of toluene in simulated atmospheric matrix and characterization of large molecular weight products by +APPI FT-ICR MS." Science of The Total Environment 649, no. : 111-119.

Journal article
Published: 01 February 2018 in Science of The Total Environment
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Short-chain chlorinated paraffins (SCCPs) are classed as persistent organic pollutants and were included in the Stockholm Convention in May 2017. Large amounts of chlorinated paraffins (CPs) are produced in China than in any other countries. CPs can be released into the environment while being produced and used, and can bioaccumulate in aquatic biota and be ingested by humans. Dietary intake is the main route through which humans are exposed to CPs. It has previously been found that persistent organic pollutant concentrations are usually higher in aquatic foods than in other foods. The risk of human exposure to SCCPs in aquatic foods should therefore be of concerns. However, SCCP concentrations in aquatic foods have not been systematically studied. A total of 1620 aquatic food samples were collected, and 18 pooled samples were analyzed by two-dimensional gas chromatography coupled with electron-capture negative-ionization time-of-flight mass spectrometry. The mean SCCP and MCCP concentrations were 1472 and 80.5ng/gwet weight, respectively. The dominant SCCP and MCCP congener groups were CCl and CCl, respectively. The concentrations were much higher than those have been found in aquatic foods in other countries. The CP concentrations in the samples consumed by local people from eastern and southern China were higher than the concentrations in samples from central and western China. Risk assessment results indicated that SCCPs and MCCPs in aquatic foods do not pose significant risks to residents of China.

ACS Style

Runhua Wang; Lirong Gao; Minghui Zheng; Yiling Tian; Jingguang Li; Lei Zhang; Yongning Wu; Huiting Huang; Lin Qiao; Wenbin Liu; Guijin Su; Guorui Liu; Ying Liu. Short- and medium-chain chlorinated paraffins in aquatic foods from 18 Chinese provinces: Occurrence, spatial distributions, and risk assessment. Science of The Total Environment 2018, 615, 1199 -1206.

AMA Style

Runhua Wang, Lirong Gao, Minghui Zheng, Yiling Tian, Jingguang Li, Lei Zhang, Yongning Wu, Huiting Huang, Lin Qiao, Wenbin Liu, Guijin Su, Guorui Liu, Ying Liu. Short- and medium-chain chlorinated paraffins in aquatic foods from 18 Chinese provinces: Occurrence, spatial distributions, and risk assessment. Science of The Total Environment. 2018; 615 ():1199-1206.

Chicago/Turabian Style

Runhua Wang; Lirong Gao; Minghui Zheng; Yiling Tian; Jingguang Li; Lei Zhang; Yongning Wu; Huiting Huang; Lin Qiao; Wenbin Liu; Guijin Su; Guorui Liu; Ying Liu. 2018. "Short- and medium-chain chlorinated paraffins in aquatic foods from 18 Chinese provinces: Occurrence, spatial distributions, and risk assessment." Science of The Total Environment 615, no. : 1199-1206.

Journal article
Published: 01 February 2018 in Journal of Hazardous Materials
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NixCo1-xFe2Oz composite oxide nanosphere was successfully prepared, to degrade 2-monochlorobiphenly (CB-1) in continuous-flow fixed-bed microreactor at GHSV of 20000h(-1). The five cycles of temperature-dependent run experiments between 150 and 350°C showed its superior activity with a CB-1 conversion of more than 95% above 300°C over Ni0.5Co0.5Fe2Oz. Importantly, the sustainable higher reactivity could be observed over prolonged 600min reaction times after the 5th run test. The degradation products detected as biphenyl and monochlorobenzene with yield ratio of 129, account for 0.24% and 0.0011% of initial CB-1 respectively. This indicated the weak occurrence of hydrodechlorination and breakage of CC bridge bond during the degradation of CB-1. The possibly dominant occurrence of oxidative degradation probably follows Mars-van Krevelen mechanism, resulting in the generation of the formic, acetic, propanoic and butyric acids and so on. Due to the high oxygen mobility over Ni0.5Co0.5Fe2Oz nanosphere, the consumed oxygen species could be compensated rapidly by the gas phase oxygen via O2→O2(-) → 2O(-) → 2O(2-). The interaction among different elements in Ni0.5Co0.5Fe2Oz nanosphere confirmed by the derivation of the electron cloud, enhanced the mobility of the reactive oxygen species, which would be beneficial for the oxidation of chlorinated biphenyls.

ACS Style

Linyan Huang; Qianqian Li; Guijin Su; Minghui Zheng; Yalu Liu; Yangyang Gu; Lirong Gao; Guorui Liu; Wenbin Liu. Sustainable superior function of the synthesized NixCo1-xFe2Oz nanosphere on the destruction of chlorinated biphenyls in the effluent. Journal of Hazardous Materials 2018, 344, 64 -72.

AMA Style

Linyan Huang, Qianqian Li, Guijin Su, Minghui Zheng, Yalu Liu, Yangyang Gu, Lirong Gao, Guorui Liu, Wenbin Liu. Sustainable superior function of the synthesized NixCo1-xFe2Oz nanosphere on the destruction of chlorinated biphenyls in the effluent. Journal of Hazardous Materials. 2018; 344 ():64-72.

Chicago/Turabian Style

Linyan Huang; Qianqian Li; Guijin Su; Minghui Zheng; Yalu Liu; Yangyang Gu; Lirong Gao; Guorui Liu; Wenbin Liu. 2018. "Sustainable superior function of the synthesized NixCo1-xFe2Oz nanosphere on the destruction of chlorinated biphenyls in the effluent." Journal of Hazardous Materials 344, no. : 64-72.

Journal article
Published: 01 February 2018 in Environmental Pollution
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Food intake is one of the main pathways of human exposure to chlorinated paraffins (CPs). This study assessed the dietary exposure for the general Chinese population to short-chain chlorinated paraffin (SCCPs) and medium-chain chlorinated paraffins (MCCPs) through meat and meat products. Twenty samples of meat and meat products from 20 Chinese provinces were collected in 2011. As the sampling sites covered about two-thirds of the Chinese population, the meat samples were considered to be representative of the true characteristics of CPs contamination in Chinese meat products. The concentrations of SCCPs and MCCPs in the meat samples were measured using the comprehensive two-dimensional gas chromatography electron capture negative ionization high-resolution time-of-flight mass spectrometry method. Forty-eight SCCP and MCCP homolog groups were detected in the meat samples. The mean SCCP and MCCP concentrations in all meat samples were 129 ± 4.1 ng g(-1) wet weight and 5.7 ± 0.59 ng g(-1) wet weight, respectively. The concentrations of SCCPs and MCCPs varied in samples from different provinces. The geographical distribution of CP concentrations was similar to the distribution of CPs manufacturing plants in China. The most abundant groups of SCCPs in all samples were C10-11 Cl6-7, and the most abundant groups of MCCPs in most samples were C14 Cl7-8. The possible sources of SCCPs and MCCPs in meat and meat products might be CP-42 and CP-52. The 50th percentile estimated daily intakes of SCCPs and MCCPs through meat consumption for a "standard" Chinese adult male were 0.13 and 0.0047 μg kg(-1) bw d(-1), respectively, both much lower than the tolerable daily intakes (TDIs) for SCCPs and MCCPs. This preliminary risk assessment has indicated that the indirect exposure of SCCPs and MCCPs through meat consumption does not pose significant risk to human health in China.

ACS Style

Huiting Huang; Lirong Gao; Minghui Zheng; Jingguang Li; Lei Zhang; Yongning Wu; Runhua Wang; Dan Xia; Lin Qiao; Lili Cui; Guijin Su; Wenbin Liu; Guorui Liu. Dietary exposure to short- and medium-chain chlorinated paraffins in meat and meat products from 20 provinces of China. Environmental Pollution 2018, 233, 439 -445.

AMA Style

Huiting Huang, Lirong Gao, Minghui Zheng, Jingguang Li, Lei Zhang, Yongning Wu, Runhua Wang, Dan Xia, Lin Qiao, Lili Cui, Guijin Su, Wenbin Liu, Guorui Liu. Dietary exposure to short- and medium-chain chlorinated paraffins in meat and meat products from 20 provinces of China. Environmental Pollution. 2018; 233 ():439-445.

Chicago/Turabian Style

Huiting Huang; Lirong Gao; Minghui Zheng; Jingguang Li; Lei Zhang; Yongning Wu; Runhua Wang; Dan Xia; Lin Qiao; Lili Cui; Guijin Su; Wenbin Liu; Guorui Liu. 2018. "Dietary exposure to short- and medium-chain chlorinated paraffins in meat and meat products from 20 provinces of China." Environmental Pollution 233, no. : 439-445.

Research article
Published: 24 August 2017 in Environmental Science & Technology
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Flowerlike LiαTiOx micro/nanostructures were successfully synthesized to degrade 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47) at 250–350 °C. The pseudo-first-order kinetics rate constant of the reaction at 300 °C was in the range of 0.034–0.055 min–1. The activation energy was as low as 39.9–48.1 kJ/mol. The excellent performance attained over LiαTiOx was attributed to Li dopant having the electron-donating effect, which enhanced the oxygen species mobility. The oxidative reaction was believed to be the dominant degradation pathway following the Mars–van Krevelen mechanism, being accompanied by the weak hydrodebromination occurrence generating the trace mono- to tri-BDEs. More than 70 types of oxidation products containing diphenyl ether backbone, single-benzene rings, and ring-opened products were detected by GC-MS with derivatization, ESI-FT-ICR-MS, and ion chromatography. An increase in the number of ring-cracked oxidative products under prolonged reaction was observed by ESI-FT-ICR-MS analysis according to the van Krevelen diagram. In the oxidative reaction, a series of oxidative products, such as OH-tri-BDEs and OH-tetra-BDEs, first formed via the nucleophilic O2– attack and subsequently transformed into dibromophenol, tribromophenol, and benzenedicarboxylic and benzoic acids, etc. They could be further attacked by electrophilic O2– and O– and completely cracked to small molecules such as formic, acetic, propionic, and butyric acids.

ACS Style

Qianqian Li; Guijin Su; Minghui Zheng; Mengjing Wang; Yalu Liu; Fang Luo; Yangyang Gu; Rong Jin. Thermal Oxidation Degradation of 2,2′,4,4′-Tetrabromodiphenyl Ether over LiαTiOx Micro/Nanostructures with Dozens of Oxidative Product Analyses and Reaction Mechanisms. Environmental Science & Technology 2017, 51, 10059 -10071.

AMA Style

Qianqian Li, Guijin Su, Minghui Zheng, Mengjing Wang, Yalu Liu, Fang Luo, Yangyang Gu, Rong Jin. Thermal Oxidation Degradation of 2,2′,4,4′-Tetrabromodiphenyl Ether over LiαTiOx Micro/Nanostructures with Dozens of Oxidative Product Analyses and Reaction Mechanisms. Environmental Science & Technology. 2017; 51 (17):10059-10071.

Chicago/Turabian Style

Qianqian Li; Guijin Su; Minghui Zheng; Mengjing Wang; Yalu Liu; Fang Luo; Yangyang Gu; Rong Jin. 2017. "Thermal Oxidation Degradation of 2,2′,4,4′-Tetrabromodiphenyl Ether over LiαTiOx Micro/Nanostructures with Dozens of Oxidative Product Analyses and Reaction Mechanisms." Environmental Science & Technology 51, no. 17: 10059-10071.

Journal article
Published: 01 June 2017 in Environment International
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Chlorinated paraffins (CPs) are complex mixtures of synthetic chemicals found widely in environmental matrices. Short-chain CPs (SCCPs) are candidate persistent organic pollutants under the Stockholm Convention. There should be great concern about human exposure to SCCPs. Data on CP concentrations in human breast milk is scarce. This is the first study in which background SCCP and medium-chain CP (MCCP) body burdens in the general rural population of China have been estimated and health risks posed to nursing infants by CPs in breast milk assessed. The concentrations of 48 SCCP and MCCP formula congeners were determined in 24 pooled human milk samples produced from 1412 individual samples from eight provinces in 2007 and 16 provinces in 2011. The samples were analyzed by comprehensive two-dimensional gas chromatography electron capture negative ionization high-resolution time-of-flight mass spectrometry. The median SCCP and MCCP concentrations were 303 and 35.7ngg lipid weight, respectively, for the 2007 samples and 360 and 45.4ngg lipid weight, respectively, for the 2011 samples. The C and C homologs were the dominant CP carbon-chain-length groups, contributing 51% and 82% of the total SCCP and MCCP concentrations, respectively. There are probably multiple CP sources to the general Chinese population and numerous exposure pathways. The median estimated daily SCCP and MCCP intakes for nursing infants were 1310 and 152ngkgd, respectively, in 2007 and 1520 and 212ngkgd, respectively, in 2011. SCCPs do not currently pose significant risks to infants in China. However, it is necessary to continuously monitor CP concentrations and health risks because CP concentrations in Chinese human breast milk are increasing.

ACS Style

Dan Xia; Li-Rong Gao; Ming-Hui Zheng; Jing-Guang Li; Lei Zhang; Yong-Ning Wu; Lin Qiao; Qi-Chang Tian; Hui-Ting Huang; Wen-Bin Liu; Gui-Jin Su; Guo-Rui Liu. Health risks posed to infants in rural China by exposure to short- and medium-chain chlorinated paraffins in breast milk. Environment International 2017, 103, 1 -7.

AMA Style

Dan Xia, Li-Rong Gao, Ming-Hui Zheng, Jing-Guang Li, Lei Zhang, Yong-Ning Wu, Lin Qiao, Qi-Chang Tian, Hui-Ting Huang, Wen-Bin Liu, Gui-Jin Su, Guo-Rui Liu. Health risks posed to infants in rural China by exposure to short- and medium-chain chlorinated paraffins in breast milk. Environment International. 2017; 103 ():1-7.

Chicago/Turabian Style

Dan Xia; Li-Rong Gao; Ming-Hui Zheng; Jing-Guang Li; Lei Zhang; Yong-Ning Wu; Lin Qiao; Qi-Chang Tian; Hui-Ting Huang; Wen-Bin Liu; Gui-Jin Su; Guo-Rui Liu. 2017. "Health risks posed to infants in rural China by exposure to short- and medium-chain chlorinated paraffins in breast milk." Environment International 103, no. : 1-7.

Journal article
Published: 01 June 2017 in Environmental Pollution
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Persistent organic pollutants (POPs) were listed in the Stockholm Convention, because of their adverse health effects, persistence, bioaccumulation and ubiquitous presence in the environment. Short chain chlorinated paraffins (SCCPs), chlorinated derivatives of n-alkanes, have been listed as candidate POPs under Stockholm Convention. Inhalation uptake was an important exposure pathway for non-occupational adult human and the pollution of particle matter has caused great concern. There are some studies focused on POPs such as polychlorinated biphenyls, polychlorinated dibenzo-p-dioxins and dibenzofurans and polybrominated diphenyl ethers in different size particles. However, there were no studies that discussed CP concentrations in particulate matter (PM) with different sizes. In this study, a total of 30 PM samples were collected both outdoors and indoors at a sampling site in Beijing. These samples were used to investigate the concentrations and distributions of SCCPs and medium chain chlorinated paraffins (MCCPs) in PM fractions of different sizes, and to evaluate inhalation exposure risks. The results showed that the average SCCPs and MCCPs in the outdoor PM were 23.9 and 3.6 ng m, while the mean values in indoor were 61.1 and 6.9 ng m, respectively. The levels of SCCPs and MCCPs in indoor and outdoor were relatively high. SCCP and MCCP concentrations in the indoor PM/PM/PM samples were higher than the corresponding values in the outdoor, because of the using of some products containing CPs in the indoors, like paints and coatings, leather and rubber products. In both outdoor and indoor air, CPs are mainly associated with particles ≤2.5 μm in diameter. The main homolog groups for both SCCPs and MCCPs were CCl. It is assumed that SCCPs in the outdoor and indoor PM samples may mainly derive from the production and use of CP-42 and CP-52.

ACS Style

Huiting Huang; Lirong Gao; Dan Xia; Lin Qiao; Runhua Wang; Guijin Su; Wenbin Liu; Guorui Liu; Minghui Zheng. Characterization of short- and medium-chain chlorinated paraffins in outdoor/indoor PM 10 /PM 2.5 /PM 1.0 in Beijing, China. Environmental Pollution 2017, 225, 674 -680.

AMA Style

Huiting Huang, Lirong Gao, Dan Xia, Lin Qiao, Runhua Wang, Guijin Su, Wenbin Liu, Guorui Liu, Minghui Zheng. Characterization of short- and medium-chain chlorinated paraffins in outdoor/indoor PM 10 /PM 2.5 /PM 1.0 in Beijing, China. Environmental Pollution. 2017; 225 ():674-680.

Chicago/Turabian Style

Huiting Huang; Lirong Gao; Dan Xia; Lin Qiao; Runhua Wang; Guijin Su; Wenbin Liu; Guorui Liu; Minghui Zheng. 2017. "Characterization of short- and medium-chain chlorinated paraffins in outdoor/indoor PM 10 /PM 2.5 /PM 1.0 in Beijing, China." Environmental Pollution 225, no. : 674-680.

Journal article
Published: 01 May 2017 in Journal of Environmental Sciences
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ACS Style

Yanhui Zhao; Qianqian Li; Xue Miao; Xinchen Huang; Binke Li; Guijin Su; Minghui Zheng. Determination of hexabromocyclododecanes in sediments from the Haihe River in China by an optimized HPLC–MS–MS method. Journal of Environmental Sciences 2017, 55, 174 -183.

AMA Style

Yanhui Zhao, Qianqian Li, Xue Miao, Xinchen Huang, Binke Li, Guijin Su, Minghui Zheng. Determination of hexabromocyclododecanes in sediments from the Haihe River in China by an optimized HPLC–MS–MS method. Journal of Environmental Sciences. 2017; 55 ():174-183.

Chicago/Turabian Style

Yanhui Zhao; Qianqian Li; Xue Miao; Xinchen Huang; Binke Li; Guijin Su; Minghui Zheng. 2017. "Determination of hexabromocyclododecanes in sediments from the Haihe River in China by an optimized HPLC–MS–MS method." Journal of Environmental Sciences 55, no. : 174-183.

Journal article
Published: 20 March 2017 in RSC Advances
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Generated PeCNs to MoCNs congeners during the degradation of CN-27 over Fe–Al mixed composite oxides suggest the occurrence of successive hydrodechlorination and side chlorination pathways.

ACS Style

Yalu Liu; Huijie Lu; Wenxiao Pan; Qianqian Li; Guijin Su; Minghui Zheng; Lirong Gao; Guorui Liu; Wenbin Liu. Degradation of one-side fully-chlorinated 1,2,3,4-tetrachloronaphthalene over Fe–Al composite oxides and its hypothesized reaction mechanism. RSC Advances 2017, 7, 17577 -17585.

AMA Style

Yalu Liu, Huijie Lu, Wenxiao Pan, Qianqian Li, Guijin Su, Minghui Zheng, Lirong Gao, Guorui Liu, Wenbin Liu. Degradation of one-side fully-chlorinated 1,2,3,4-tetrachloronaphthalene over Fe–Al composite oxides and its hypothesized reaction mechanism. RSC Advances. 2017; 7 (29):17577-17585.

Chicago/Turabian Style

Yalu Liu; Huijie Lu; Wenxiao Pan; Qianqian Li; Guijin Su; Minghui Zheng; Lirong Gao; Guorui Liu; Wenbin Liu. 2017. "Degradation of one-side fully-chlorinated 1,2,3,4-tetrachloronaphthalene over Fe–Al composite oxides and its hypothesized reaction mechanism." RSC Advances 7, no. 29: 17577-17585.

Journals
Published: 27 February 2017 in Environmental Science: Nano
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The effect of different crystalline forms of Al2O3 on the degradation of CN-1 is shown where γ-Al2O3 displays superior oxidation activity.

ACS Style

Huijie Lu; Qianqian Li; Guijin Su; Minghui Zheng; Yuyang Zhao; Xue Miao; Yalu Liu; Xinchen Huang; Yanhui Zhao. Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene. Environmental Science: Nano 2017, 4, 994 -1004.

AMA Style

Huijie Lu, Qianqian Li, Guijin Su, Minghui Zheng, Yuyang Zhao, Xue Miao, Yalu Liu, Xinchen Huang, Yanhui Zhao. Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene. Environmental Science: Nano. 2017; 4 (5):994-1004.

Chicago/Turabian Style

Huijie Lu; Qianqian Li; Guijin Su; Minghui Zheng; Yuyang Zhao; Xue Miao; Yalu Liu; Xinchen Huang; Yanhui Zhao. 2017. "Synthesis of three crystalline forms of Al2O3 featuring rod-like fibers and their effect on the gaseous degradation of 1-chloronaphthalene." Environmental Science: Nano 4, no. 5: 994-1004.