Article
Engineering, Environmental
Fobang Liu, Tianchang Xu, Nga Lee Ng, Hang Lu
Summary: This study reveals that oxidative stress may be a mechanism through which ambient fine particulate matter exerts adverse biological effects. It also demonstrates the association between cellular health and ROS levels upon exposure to secondary organic aerosols, emphasizing the role of oxidative stress in the biological effects of SOA exposure.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Wenfei Zhu, Song Guo, Shengrong Lou, Hui Wang, Ying Yu, Weizhao Xu, Yucun Liu, Zhen Cheng, Xiaofeng Huang, Lingyan He, Limin Zeng, Shiyi Chen, Min Hu
Summary: A novel algorithm was proposed to determine the scattering coefficient of OA by evaluating the MSEs for POA and SOA with their mass concentrations at three distinct sites in China. The calculated dry scattering coefficients using the reconstructing algorithm showed good consistency with measured values in Shanghai and Dezhou, indicating the applicability of the algorithms for OA and PM1 in predicting scattering coefficients in China.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Vipul Lalchandani, Varun Kumar, Anna Tobler, Navaneeth M. Thamban, Suneeti Mishra, Jay G. Slowik, Deepika Bhattu, Pragati Rai, Rangu Satish, Dilip Ganguly, Suresh Tiwari, Neeraj Rastogi, Shashi Tiwari, Griga Motnik, Andre S. H. Prevot, Sachchida N. Tripathi
Summary: The study conducted real-time chemical characterization of fine particulate matter in different locations in Delhi, finding that PM2.5 and PM1 particles are mainly composed of organics, followed by chloride, ammonium, nitrate, sulfate, and black carbon. There were significant differences in the absolute OOA concentration between the two urban sites, indicating the influence of local emissions on the oxidized OA formation. The chemical composition, diurnal and temporal variations of PM at the three sites suggest similar sources affecting particulate pollution in Delhi and adjoining cities, but with more local influence than regional.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Weiqi Xu, Wei Zhou, Zhijie Li, Qingqing Wang, Aodong Du, Bo You, Lu Qi, Andre S. H. Prevot, Junji Cao, Zifa Wang, Jiang Zhu, Yele Sun
Summary: The reductions in traffic-related emissions and fossil fuel-related organic aerosols during the 2021 Chinese New Year in Beijing were smaller than previous years, while the concentrations of secondary aerosol species increased due to a severe haze episode. The composition of organic aerosols also changed, with an increase in oxidized primary aerosols and a decrease in aqueous-phase secondary aerosols.
ENVIRONMENTAL POLLUTION
(2022)
Article
Engineering, Environmental
Chun Cai, Xiaodi Duan, Xianjun Xie, Shuping Kang, Chanjuan Liao, Jiaming Dong, Yangfan Liu, Shaofeng Xiang, Dionysios D. Dionysiou
Summary: This study significantly enhanced the degradation and mineralization of CA using CF/O3 process, mainly through the action of ROS on the catalyst surface. The acute toxicity of the treated solution increased initially and then rapidly declined during the reaction process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Yanping Yang, Wenkai Guo, Jian Sun, Qiang Chen, Xianhong Meng, Lina Wang, Huijie Tao, Lili Yang
Summary: The study aims to understand the characteristics of VOCs and SOA pollution in different functional areas of petrochemical industrial cities. Real-time online monitoring instruments were used to determine PM2.5, VOCs, and other factors in Lanzhou, a typical petrochemical industrial city in Northwest China. The results showed significant differences in VOC concentrations, SOA formation potential, and particle compositions between the Xigu and Chengguan districts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Zhijie Li, Weiqi Xu, Wei Zhou, Lu Lei, Jiaxing Sun, Bo You, Zifa Wang, Yele Sun
Summary: This study investigates the chemical differences between submicron aerosol (PM1) species and fine particles (PM2.5) in Beijing, China, using a high-resolution AMS and a time-of-flight ACSM. The results show that aerosol species in PM2.5 are highly correlated with those in PM1, but the PM1/PM2.5 ratios vary greatly for different species. Nitrate is dominant in PM1, while a significant fraction of sulfate is observed in the PM1-2.5 range. PM1 organics show higher fractions in PM2.5 in summer. The study also compares the source apportionment of organic aerosol (OA) between PM1 and PM2.5, revealing substantial differences in primary and secondary OA composition, especially in winter. Additionally, a parameterized relationship between oxygen-to-carbon ratio and CV f44 is developed, which has implications for studying the oxidation and hygroscopicity properties of OA.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Subin Yoon, Stephanie M. Ortiz, Adelaide E. Clark, Tate E. Barrett, Sascha Usenko, Rachelle M. Duvall, Lea Hildebrandt Ruiz, Jeffrey K. Bean, Cameron B. Faxon, James H. Flynn, Barry L. Lefer, Yu Jun Leong, Robert J. Griffin, Rebecca J. Sheesley
Summary: Understanding the sources and composition of organic carbon in the Houston metropolitan area and the relationship with O-3 and PM concentrations was investigated using chemical mass balance modeling and radiocarbon analysis. Results showed a consistent urban background of contemporary carbon and motor vehicle exhaust, with fossil SOC having a stronger correlation with daily maximum 8 h average O-3 during high PM and O-3 events. Impacts of point source emissions processed by onand off-shore wind cycles likely contribute to peak events for both PM and O-3 in the greater Houston metropolitan area.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Shijie Liu, Yiqian Wang, Xinbei Xu, Gehui Wang
Summary: This study provides new insight into the effect of NO2 on SOA formation through the change in o-xylene photooxidation under different RH conditions, and the complex effect of multiple environmental factors on SOA formation was also important and should not be ignored.
Article
Engineering, Environmental
Kechao Lu, Tengfei Ren, Ni Yan, Xia Huang, Xiaoyuan Zhang
Summary: This study revealed that the trade-off between reaction inhibition and mass transfer enhancement induced by salinity can affect the degradation pattern of pollutants during continuous aeration. This provides a new theoretical perspective on the role of salinity in heterogeneous catalytic ozonation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Liyuan Zhou, Tengyu Liu, Dawen Yao, Hai Guo, Chunlei Cheng, Chak K. Chan
Summary: Cooking is a significant source of organic aerosols in urban areas, with animal fats emitting both POA and NMOGs that can form OOA after atmospheric oxidation. Laboratory studies found that some POA emitted during cooking can transform into OOA after aging.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Mackenzie B. Humes, Mingyi Wang, Sunhye Kim, Jo E. Machesky, Drew R. Gentner, Allen L. Robinson, Neil M. Donahue, Albert A. Presto
Summary: The study finds that aromatic compounds are the main contributors to secondary organic aerosol (SOA) formation from volatile chemical products (VCPs), while ether and ester functional groups hinder the autoxidation process. Therefore, reducing the use of oxygenated aromatic compounds in VCPs may help decrease the generation of SOA in urban areas.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yu Wang, Aristeidis Voliotis, Dawei Hu, Yunqi Shao, Mao Du, Ying Chen, Judith Kleinheins, Claudia Marcolli, M. Rami Alfarra, Gordon McFiggans
Summary: To understand the chemical controls of sub- and super-saturated aerosol water uptake, chamber experiments were conducted to investigate the physicochemical properties of secondary organic aerosol (SOA) during photo-oxidation of different volatile organic compounds (VOCs) in the presence of ammonium sulfate seeds. The results showed that the water uptake ability of aerosols was mainly controlled by the SOA mass fraction, and the discrepancy in water uptake at high SOA mass fraction could be attributed to non-ideality and evaporation of semi-volatile organics. The composition-dependency of the kappa-Kohler approach on cloud droplet prediction could introduce uncertainty in models.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Meteorology & Atmospheric Sciences
V Lalchandani, D. Srivastava, J. Dave, S. Mishra, N. Tripathi, A. K. Shukla, R. Sahu, N. M. Thamban, S. Gaddamidi, K. Dixit, D. Ganguly, S. Tiwari, A. K. Srivastava, L. Sahu, N. Rastogi, P. Gargava, S. N. Tripathi
Summary: Delhi metropolitan area experiences severe haze during the post-monsoon and winter season, mainly composed of organic and secondary inorganic particles. Burning of biomass is the major contributor to haze events, with both long-range transport and local burning as sources. Nighttime oxidation facilitates the rapid formation of organic and inorganic particles.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Jixing Liu, Shuping Zhu, Teng Guo, Bin Jia, Li Xu, Jun Chen, Ping Cheng
Summary: This study investigates the gas- and particle-phase naphthalene (Nap) ozonolysis and its role as a precursor for secondary organic aerosols (SOAs). It is found that Nap reacts to form gas-phase products as well as SOAs via homogeneous and heterogeneous reactions. The formation of Nap-SOAs is attributed to the creation of new particles and the uptake of oxidation products on gas-phase or particle surfaces. This study provides insights into the migration and transformation of PAHs in the atmosphere.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Jinxi Hua, Yuanxun Zhang, Benjamin de Foy, Xiaodong Mei, Jing Shang, Chuan Feng
Summary: The study analyzed the impact of holidays on air pollution in Beijing during the heating season from 2014 to 2018. It found significant variations in PM2.5 and NO2 concentrations, with a stronger holiday effect compared to weekends and clear geographical patterns in the strength of the effect.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Jinxi Hua, Yuanxun Zhang, Benjamin de Foy, Xiaodong Mei, Jing Shang, Yang Zhang, Ishaq Dimeji Sulaymon, Dandan Zhou
Summary: This study evaluated the performance of linear and GAM calibration models for LCS PM2.5 measurements under different relative humidity levels. The results showed that the linear model performed well in dry conditions, while the GAM model performed better in humid conditions.
AEROSOL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Hailin Wang, Run Hao, Lei Nie, Xin Zhang, Yuanxun Zhang
Summary: This study investigated the characteristics of air multi-pollutants emitted during typical electronic waste dismantling processes and assessed their risks to the environment and human health. The study found that emission control measures can decrease the concentrations of pollutants and reduce the ozone formation potential and non-cancer risk. The emissions from e-waste recycling processes should be considered as an important source of air pollution, and more efficient control measures should be taken in the future.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Jing Shang, Yuanxun Zhang, James J. Schauer, Sumin Chen, Shujian Yang, Tingting Han, Dong Zhang, Jinjian Zhang, Jianxiong An
Summary: This study investigated the ability to predict the inherent oxidation potential (OP) of particulate matter (PM) in Beijing based on the chemical composition, pollutants, and sources. The results showed that the calculated metrics of excess lifetime cancer risk (ELCR) and hazard index (HI) could predict the OP of PM, and the prediction models based on pollution sources performed better than those based on pollutants. Additionally, the relationships developed in Europe and North America were found to have good predictive ability in Beijing, suggesting their applicability to other regions.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Michael R. Olson, Wang Yuqin, Benjamin de Foy, Zhengqiang Li, Michael H. Bergin, Yuanxun Zhang, James Jay Schauer
Summary: The study focused on estimating atmospheric light absorption related to emission sources by collecting BC and BrC data using an Aethalometer in Beijing. Mobile sources were found to be the major contributor to near-UV light absorption, with air mass origin not impacting absorption reconstruction. The approach allows for a more robust method of assigning light absorption to source categories and expanding BrC apportionment to multiple sources.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yuxiong Chen, Siqin Feng, Zhen'ge Chang, Yakun Zhao, Jia Fu, Yijie Liu, Siqi Tang, Yitao Han, Yanbo Liu, Yuanxun Zhang, Shuyang Zhang, Zhongjie Fan
Summary: The use of household solid fuel for cooking and heating is positively associated with diabetes and fasting blood glucose levels. These findings suggest that reducing household solid fuel use may contribute to a decrease in diabetes development in China.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Bi'an Zhou, Tianyi Zhao, Jian Ma, Yuanxun Zhang, Lijia Zhang, Peng Huo, Yang Zhang
Summary: The study found that VOC pollution in the suburbs of Beijing after the coal to electricity project was mainly caused by local emissions. The contribution of coal combustion to VOCs increased significantly, but the TVOCs concentration was lower than before heating. Most of the selected VOC species had carcinogenic risks above the acceptable level.
Article
Engineering, Environmental
Xiaoying Li, Jill Baumgartner, Christopher Barrington-Leigh, Sam Harper, Brian Robinson, Guofeng Shen, Talia Sternbach, Shu Tao, Xiang Zhang, Yuanxun Zhang, Ellison Carter
Summary: The Chinese government implemented a household energy transition program in northern China, which replaced coal heating stoves with electricity-powered heat pumps. This study investigated personal air pollution exposures within and between villages, as well as the impact of sociodemographic factors. The results showed that variability in pollution exposures was greater within villages, and participants using traditional stoves had the highest levels of pollution. Wealthier households tended to burn more coal, while less wealthy households used more biomass.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yu Yan, Tianyi Zhao, Wei Huang, Dongqing Fang, Xin Zhang, Lijia Zhang, Peng Huo, Kang Xiao, Yuanxun Zhang, Yang Zhang
Summary: The complexation between transition metals (TMs) and water-soluble organic compounds (WSOCs) in atmospheric particles plays a role in the generation of reactive oxygen species (ROS). This study found that the complexation between WSOC and Cu or Mn has a synergistic effect on ROS generation, while the complexation with Fe has a negative effect. The hydrophobic fraction of WSOC and the rate of ROS generation decrease during the complexation process. Cu-WSOC exhibits the most significant synergistic effect on ROS generation, suggesting that aromatic and polar substituents in WSOC dominate the complexation process.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Construction & Building Technology
Xiaoying Li, Jill Baumgartner, Sam Harper, Xiang Zhang, Talia Sternbach, Christopher Barrington-Leigh, Collin Brehmer, Brian Robinson, Guofeng Shen, Yuanxun Zhang, Shu Tao, Ellison Carter
Summary: The COVID-19 lockdown in China reduced community air pollution, but had minimal impact on indoor air quality. Household energy choice and indoor smoking had a greater influence on indoor air quality than the lockdown.
Article
Multidisciplinary Sciences
Jue Zhao, Ling Jin, Dong Wu, Jia-wen Xie, Jun Li, Xue-wu Fu, Zhi-yuan Cong, Ping-qing Fu, Yang Zhang, Xiao-san Luo, Xin-bin Feng, Gan Zhang, James M. Tiedje, Xiang-dong Li
Summary: This study analyzed the bacterial communities in airborne particulate samples from around the world and found that they have a biogeographic pattern and interact with surface environments. While the total abundance of airborne bacteria is lower than other habitats, the number of bacterial taxa is comparable to the hydrosphere and is highest in midlatitude regions. The structure of the airborne bacterial community is easily perturbed and influenced by surface microbiomes and atmospheric conditions, particularly in urban areas. These findings provide valuable insights for predicting microbial responses and health impacts in different environments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Tianyi Zhao, Yu Yan, Bian Zhou, Xuezhen Zhong, Xiaoyu Hu, Lijia Zhang, Peng Huo, Kang Xiao, Yuanxun Zhang, Yang Zhang
Summary: This study investigated the interaction between Water-Soluble Organic Compounds (WSOCs) and Transition Metals (TMs) and its impact on Reactive Oxygen Species (ROS) generation. The results showed that the interaction between WSOCs and TMs significantly affected ROS generation, with the organic compound SRFA exhibiting a stronger ability to complex with TMs and facilitate ROS generation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Analytical
Shiyu Cheng, Zitao Yan, Lixin Shan, Jingyun Huang, Zhangqi Yu, Zhiyang Wei, Haijie Wang, Zhen Li, Bo Yang, Jinian Shu
Summary: A novel high-flux EUV light source is developed using a microchannel plate (MCP) window in this study, which has many application prospects in scientific research, especially in mass spectrometry.
ANALYTICAL CHEMISTRY
(2023)
