Article
Environmental Sciences
Haichao Wang, Keding Lu, Shiyi Chen, Xin Li, Limin Zeng, Min Hu, Yuanhang Zhang
Summary: The study found significant changes in the NO3 budget in Beijing between 2013 and 2019, impacting secondary aerosol formation in different seasons. Winter saw enhanced formation of NO3 and N2O5, leading to persistent particulate nitrate pollution, while summer policies helped to moderate secondary aerosol formation caused by NO3 and N2O5 chemistry.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Haichao Wang, Bin Yuan, E. Zheng, Xiaoxiao Zhang, Jie Wang, Keding Lu, Chenshuo Ye, Lei Yang, Shan Huang, Weiwei Hu, Suxia Yang, Yuwen Peng, Jipeng Qi, Sihang Wang, Xianjun He, Yubin Chen, Tiange Li, Wenjie Wang, Yibo Huangfu, Xiaobing Li, Mingfu Cai, Xuemei Wang, Min Shao
Summary: Field measurements in the Pearl River Delta showed higher concentrations of ClNO2 and N2O5 in urban areas compared to background marine regions. Nighttime ClNO2 formation was limited by N2O5 uptake, and particulate chloride was mainly attributed to anthropogenic emissions rather than sea salt particles. Model simulations indicated that ClNO2 chemistry had a minor impact on atmospheric oxidation, with relatively higher contributions observed in urban air masses.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Multidisciplinary Sciences
Haichao Wang, Xuefei Ma, Zhaofeng Tan, Hongli Wang, Xiaorui Chen, Shiyi Chen, Yaqin Gao, Ying Liu, Yuhan Liu, Xinping Yang, Bin Yuan, Limin Zeng, Cheng Huang, Keding Lu, Yuanhang Zhang
Summary: This study reveals the previously overlooked anthropogenic monoterpene emissions effectively worsen ozone pollution in eastern China, accounting for 6-16% of the total ozone production. Monoterpene oxidations from biomass burning significantly enhance ozone formation, highlighting the importance of considering anthropogenic monoterpenes in coordinated mitigation of O-3 and particulate matter pollution.
NATIONAL SCIENCE REVIEW
(2022)
Article
Environmental Sciences
Dan Wang, Pinhua Xie, Renzhi Hu, Zhiyan Li, Hao Chen, Huawei Jin
Summary: This study measured NO3, NO2, O3, and relevant parameters in a rural site on the North China Plain. The results showed that the NOx chemistry was active in the rural site during summer, with the heterogeneous reaction of N2O5 dominating the nocturnal NOx loss.
Article
Engineering, Environmental
Raphael Mayorga, Yu Xia, Zixu Zhao, Bo Long, Haofei Zhang
Summary: This study investigates the nighttime oxidation and secondary organic aerosol (SOA) formation mechanisms of limonene. The results show that limonene can be oxidized rapidly by ozone and nitrate radicals, leading to the formation of highly oxidized organic nitrates and nitrooxy peroxy radicals. Quantum chemical calculations and kinetic simulations reveal the main oxidation pathways, which explain the observed highly oxidized organic nitrates. The study also demonstrates the relevance of these mechanisms in the formation of organic aerosols in the nighttime atmosphere.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Fangbing Li, Dan Dan Huang, Wei Nie, Yee Jun Tham, Shengrong Lou, Yuanyuan Li, Linhui Tian, Yuliang Liu, Min Zhou, Haichao Wang, Liping Qiao, Hongli Wang, Zhe Wang, Cheng Huang, Yong Jie Li
Summary: This study measures the concentrations and diurnal variations of Cl-2, ClNO2, and N2O5 in the atmosphere of Shanghai and Changzhou using HR-ToF-CIMS. The results show differences in the levels and temporal patterns of these species between the two cities, indicating different N2O5 uptake and Cl activation efficiency. Heterogeneous uptake of ClNO2 and photolysis of O-3 are believed to contribute to efficient Cl-2 formation at night and day, respectively.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Menglei Yuan, Junwu Chen, Yong Xu, Rongji Liu, Tongkun Zhao, Jingxian Zhang, Zhongyu Ren, Zhanjun Liu, Carsten Streb, Hongyan He, Chao Yang, Suojiang Zhang, Guangjin Zhang
Summary: The study achieved efficient conversion of CO2 and N-2 into urea by precisely designing unique frustrated Lewis pairs in flower-like nickel borate crystals. Through the synergistic action of Lewis acidic and basic sites, inert gases were captured and activated, ultimately achieving high urea yield rates.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Annalena Gaertner, Uhut S. Karaca, Maximilian Rang, Myron Heinz, Philipp D. Engel, Ivo Krummenacher, Merle Arrowsmith, Alexander Hermann, Alexander Matler, Anna Rempel, Robert Witte, Holger Braunschweig, Max C. Holthausen, Marc-Andre Legare
Summary: We present a comprehensive study on the fixation and reductive coupling of dinitrogen with low-valent boron compounds, combining computational and experimental approaches. The results demonstrate that the selectivity of nitrogen fixation or coupling can be controlled by steric bulk or reaction conditions, enabling the synthesis of nitrogen chains as needed. Furthermore, we elucidate the electronic structure and magnetic properties of intermediates and products of the reaction using high-level computational methods.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Zhao Zhang, Song Zhou, Hongyuan Xi, Majed Shreka
Summary: This study proposed a novel marine NOx absorption technology using a composite Na2SO3/(NH2)(2)CO absorption system that efficiently absorbed NOx from ships. Through experiments, key parameters such as Na2SO3 concentration, (NH2)(2)CO concentration, SO2 concentration, oxygen concentration, NOx oxidation degree, initial NOx concentration, initial pH, and temperature were investigated to achieve a NOx absorption efficiency of 92.3% and low nitrate content under optimal conditions. The Na2SO3/(NH2)(2)CO absorption system showed great application prospects in fulfilling regulations on NOx removal efficiency and nitrate concentration in scrubber water on ships.
Article
Environmental Sciences
Sayed Mukit Hossain, Heeju Park, Hui-Ju Kang, Jong Seok Mun, Leonard Tijing, Inkyu Rhee, Jong-Ho Kim, Young-Si Jun, Ho Kyong Shon
Summary: The study utilized sludges generated from dye wastewater treatment to retrieve photoactive titania, which was heterojunctioned with graphitic carbon nitride for enhanced photocatalytic activity in removing nitrogen oxides from the atmosphere. Advanced sample characterization confirmed successful heterojunction with improved morphological and optical attributes, leading to enhanced photoactivity in removing NOx under both UV and visible light irradiance.
Article
Meteorology & Atmospheric Sciences
Ying-Bo Niu, Bo Zhu, Ling-Yan He, Zhe Wang, Xiao-Yu Lin, Meng-Xue Tang, Xiao-Feng Huang
Summary: Nitryl chloride (ClNO2) is an important chlorine reservoir in the atmosphere that affects the oxidation capacity. Observations at a background site in the Pearl River Delta in southern China showed elevated ClNO2 accumulation at night and active N2O5 heterogeneous chemistry during the day. The high nocturnal ClNO2 production and its daytime photochemistry have significant implications for regional air quality modeling.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2022)
Article
Environmental Sciences
Chuan Lin, Renzhi Hu, Pinhua Xie, Shengrong Lou, Guoxian Zhang, Jinzhao Tong, Jianguo Liu, Wenqing Liu
Summary: Comprehensive observations of the nocturnal atmospheric oxidation of NO3 and N2O5 were conducted, highlighting the dominant role of NO3 and N2O5 in nitrate formation and NOx removal. The study found high concentrations of NO3 precursors and a relatively low concentration of nighttime NO3 and N2O5, indicating rapid loss. The reactions between NO3 and VOCs and N2O5 uptake were found to play important roles in the loss of NO3 and N2O5.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Article
Thermodynamics
Mieko Kumasaki, Yuta Inose, Kazuki Inoue, Yoshihiko Sato, Yosuke Nishiwaki
Summary: This study investigated the impact of NOx exposure on the reactivity of guanidium nitrate (GN) in a humid environment. The highest conversion rate was observed at an exposure temperature of 15 degrees C, while higher temperatures hindered contact between GN and NOx. The reaction coincided with increased heat generation, and the temperature at which pressure was released from degraded GN was lower than that of the GN itself. These findings have significant implications for the performance of GN-based pyrotechnics.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Environmental Sciences
Sarah Albertin, Joel Savarino, Slimane Bekki, Albane Barbero, Nicolas Caillon
Summary: This passage discusses the study of nitrogen and oxygen isotopes in nitrogen dioxide, focusing on their potential to provide information about nitrogen oxides chemistry in the atmosphere. The researchers developed a method to trap atmospheric NO2 and measured its multi-isotopic composition for the first time, revealing diurnal and daytime variability in Delta O-17 values. The findings suggest the potential use of Delta O-17 and delta N-15 of NO2 as tracers for NOx sources and fate.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Review
Engineering, Environmental
Yangxian Liu, Lei Liu, Yan Wang
Summary: The sulfate radical-based advanced oxidation technologies show promise in removing gaseous pollutants, but face challenges like unreliable technology and high costs. Combining multiple activation technologies can help overcome these drawbacks, while improving free radical yield and pollutant removal capacity, and conducting research to reduce costs are critical for further advancement.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Xinyuan Liu, Chaoyi Guo, Yazhen Wu, Chen Huang, Keding Lu, Yuanhang Zhang, Lei Duan, Miaomiao Cheng, Fahe Chai, Fengqiao Mei, Hancheng Dai
Summary: China has made significant efforts to control air pollution and has recently committed to ambitious climate targets. This study conducted a bibliometric review of over 100 published studies to examine the cost and benefit analysis of air pollution control in China. The findings highlight the need for long-term policy simulation and collaboration across regions and sectors to ensure sustainable development and improve air quality. The paper provides decision-makers with important information and knowledge gaps in air pollution control strategies in China.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Environmental Sciences
Yue Gao, Keding Lu, Yuanhang Zhang
Summary: Peroxy radicals (RO2) formed during the oxidation of volatile organic compounds have a significant impact on atmospheric oxidation reactions. The measurement of RO2, especially distinct species, is crucial for understanding atmospheric chemistry mechanisms. Various spectroscopy and mass spectrometry methods have been developed to study RO2 in detail. This review article discusses the technologies for speciated detection of RO2 radicals, their applications, comparison of techniques, and proposes future research directions.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Review
Environmental Sciences
Yanhui Liu, Jiayin Li, Yufang Ma, Ming Zhou, Zhaofeng Tan, Limin Zeng, Keding Lu, Yuanhang Zhang
Summary: The atmospheric chemical mechanism plays a crucial role in airshed models for studying chemical behaviors and impacts. Various mechanisms, such as MCM, CBM, SAPRC, and RACM, have been developed for different research purposes. This article summarizes the development and applications of these mechanisms, compares their compositions and methods, and examines how they treat radicals in box model simulations. CBM can effectively reproduce urban pollution events at a lower cost compared to SAPRC and RACM, while RACM provides a detailed description of radicals and ozone production. SAPRC07 has lower photolysis rates for some oxygenated compounds, leading to an underestimation of radical levels. MCM is an explicit chemical mechanism that describes primary pollutants and oxidation products in detail but is rarely used in regional model simulations due to its large size. Results from box model case studies show that all mechanisms accurately describe the behavior of radicals and the production of ozone. However, CBM and SAPRC tend to underestimate radical levels, resulting in lower ozone production values. MCM and RACM are commonly used in box model studies, while CBM and SAPRC are preferred in regional simulations.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Haichao Wang, Keding Lu, Zhaofeng Tan, Xiaorui Chen, Yuhan Liu, Yuanhang Zhang
Summary: In China, over the past decade, fine particulate matter (PM) pollution has been significantly reduced due to strict emission control measures, but particulate nitrate (pNO(3)(-)) continues to increase. This review summarizes the progress in characterizing pNO(3)(-) pollution, understanding nitrate formation mechanisms, and proposing control strategies in China. The spatial and temporal distributions of pNO(3)(-) are summarized, and the importance of atmospheric oxidation capacity and ammonia in pNO(3)(-) formation is discussed. The challenges and unresolved questions in pNO(3)(-) pollution control in China are outlined.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Environmental Sciences
Chunmeng Li, Haichao Wang, Xiaorui Chen, Tianyu Zhai, Xuefei Ma, Xinping Yang, Shiyi Chen, Xin Li, Limin Zeng, Keding Lu
Summary: In this study, the measurements of two types of organic nitrates (ONs), peroxy nitrates (PNs) and alkyl nitrates (ANs), in Chengdu, China, during summer 2019, were reported. The average concentrations of PNs and ANs were found to be in the middle and upper end of the reported levels in China. The study showed higher concentrations of PNs and ANs during photochemical pollution period. The box model simulation was able to reproduce PNs during the pollution episodes, but showed overestimation in other periods.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Weijun Pan, Sunling Gong, Keding Lu, Lei Zhang, Shaodong Xie, Yuhan Liu, Huabing Ke, Xiaoling Zhang, Yuanhang Zhang
Summary: A multiscale analysis was conducted to investigate the impacts of large-scale circulation types and local-scale key weather elements on complex air pollutants in China. An emission-driven Observation-based Box Model (e-OBM) was developed to study the impact mechanisms and assess the effects of emission control in four cities. The results showed that meteorology was the dominant driver for the trend of ozone (O-3) and the current emission reductions were not enough to mitigate O-3 pollution.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yanting Qiu, Zhijun Wu, Ruiqi Man, Taomou Zong, Yuechen Liu, Xiangxinyue Meng, Jingchuan Chen, Shiyi Chen, Suxia Yang, Bin Yuan, Mijung Song, Changhyuk Kim, Junyoung Ahn, Limin Zeng, Jiyi Lee, Min Hu
Summary: This study aimed to understand haze formation in East Asia during winter by measuring the aerosol composition in Beijing and Seoul. The results showed similar pollution situations, with nitrate dominating the inorganic components in both cities. The study emphasized the importance of local secondary aerosol formation for atmospheric PM pollution in East Asian megacities.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Environmental Sciences
Fangbing Li, Dan Dan Huang, Wei Nie, Yee Jun Tham, Shengrong Lou, Yuanyuan Li, Linhui Tian, Yuliang Liu, Min Zhou, Haichao Wang, Liping Qiao, Hongli Wang, Zhe Wang, Cheng Huang, Yong Jie Li
Summary: This study measures the concentrations and diurnal variations of Cl-2, ClNO2, and N2O5 in the atmosphere of Shanghai and Changzhou using HR-ToF-CIMS. The results show differences in the levels and temporal patterns of these species between the two cities, indicating different N2O5 uptake and Cl activation efficiency. Heterogeneous uptake of ClNO2 and photolysis of O-3 are believed to contribute to efficient Cl-2 formation at night and day, respectively.
ATMOSPHERIC ENVIRONMENT
(2023)
Article
Meteorology & Atmospheric Sciences
Youlang Zhang, Haichao Wang, Xiao Lu, Lei Li, Yuanping He, Haolin Wang, Guowen He, Cheng He, Jie Wang, Shaojia Fan
Summary: By using the Empirical Orthogonal Functions method, this study identifies two dominant patterns of ozone pollution in China. It reveals a close relationship between widespread pollution processes in China and high-pressure and low-pressure anomalies in North China and the western Pacific, respectively. The first pattern is associated with a high-pressure anomaly in North China, leading to high-temperature and low-humidity anomalies that enhance photochemical reactions and elevate ozone levels. The second pattern is related to the low-pressure anomaly in the western Pacific, resulting in uniformly high ozone pollution in the south, especially in the Yangtze River Delta, the middle reaches of the Yangtze River, and the Pearl River Delta.
ATMOSPHERIC RESEARCH
(2023)
Article
Environmental Sciences
Hejun Hu, Haichao Wang, Keding Lu, Jie Wang, Zelong Zheng, Xuezhen Xu, Tianyu Zhai, Xiaorui Chen, Xiao Lu, Wenxing Fu, Xin Li, Limin Zeng, Min Hu, Yuanhang Zhang, Shaojia Fan
Summary: This study investigated the level, composition, and seasonal variation of nitrate radical (NO3) reactivity (kNO(3)) towards volatile organic compounds (VOCs) using 1-year VOC observation data in urban Beijing in 2019. The results showed a wide range of hourly kNO(3) values and significant seasonal differences in NO3 reactivity towards VOCs. Isoprene and styrene were identified as the major contributors, with isoprene dominating in spring, summer, and autumn, and styrene dominating in winter. Monoterpenes were found to potentially account for a large fraction of kNO(3). The study also established parameterization schemes for predicting reactivity and revealed the dominance of NO3 in nocturnal VOC oxidation in Beijing. The findings contribute to our understanding of atmospheric oxidation and pollution.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Chengzhi Xing, Shiqi Xu, Yuhang Song, Cheng Liu, Yuhan Liu, Keding Lu, Wei Tan, Chengxin Zhang, Qihou Hu, Shanshan Wang, Hongyu Wu, Hua Lin
Summary: Ship-based MAX-DOAS measurements were conducted in the marginal seas of China to study the vertical profiles of aerosol, NO2, and HONO. Five hot spots with enhanced NO2 VCDs were observed in different regions. The study explored the impacts of RH, temperature, and aerosol on the heterogeneous reaction of NO2 to form HONO. It also provided insights into the distribution, transformation, and environmental effects of tropospheric HONO.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Lizi Tang, Min Hu, Dongjie Shang, Xin Fang, Jianjiong Mao, Wanyun Xu, Jiacheng Zhou, Weixiong Zhao, Yaru Wang, Chong Zhang, Yingjie Zhang, Jianlin Hu, Limin Zeng, Chunxiang Ye, Song Guo, Zhijun Wu
Summary: This study conducted intensive measurements at Nam Co station on the Tibetan Plateau and found that new particle formation events were frequent during the summer monsoon season, mostly driven by organic involvement in the nucleation process. The occurrence of new particle formation events was limited during the pre-monsoon season compared to the monsoon season. These results emphasize the importance of considering the seasonal effect of new particle formation when simulating aerosol and cloud condensation nuclei quantities in the high-altitude atmosphere.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Meteorology & Atmospheric Sciences
Yan Zheng, Ruqian Miao, Qi Zhang, Yaowei Li, Xi Cheng, Keren Liao, Theodore K. Koenig, Yanli Ge, Lizi Tang, Dongjie Shang, Min Hu, Shiyi Chen, Qi Chen
Summary: The chemical differences between submicron (PM1) and fine particles (PM2.5) contribute to different adverse health effects, emphasizing the need for understanding their size-resolved composition. Extensive online measurements in Beijing across seasons revealed that traffic- and cooking-related organic aerosols (OA) accounted for 20%-30% of PM2.5 OA mass, with insignificant variations throughout the year. Secondary OA factors contributed 59%-73% of PM2.5 OA mass. The mass distributions of particulate components varied greatly between PM1 and PM2.5 and across seasons. Heterogeneous uptake and aqueous processing played important roles in distributing secondary organic aerosols in the supermicron mode in polluted areas.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Environmental Sciences
Tianyu Zhai, Keding Lu, Haichao Wang, Shengrong Lou, Xiaorui Chen, Renzhi Hu, Yuanhang Zhang
Summary: This study focuses on particulate nitrate in China and its impact on human health, air quality, and climate. The research found that heavy nitrate pollution occurs not only in winter but also in summer in eastern China. A strategy targeting both ozone and nitrate pollution was proposed for mitigation during summertime in this region.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Geosciences, Multidisciplinary
Y. C. Liu, Z. J. Wu, Y. T. Qiu, P. Tian, Q. Liu, Y. Chen, M. Song, M. Hu
Summary: This study explores the relationship between the mass fraction of inorganic compounds and the liquid-phase-transition threshold relative humidity (RHthreshold) in urban aerosol particles. The results reveal a negative correlation between RHthreshold and the mass fraction of nitrate, suggesting that higher nitrate content leads to a lower RHthreshold. Furthermore, it is observed that an increased nitrate fraction allows particles to exist in a liquid state at lower RH, potentially playing a significant role in the formation of secondary aerosols through multiphase reactions.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)
