Article
Environmental Sciences
Phatsarakorn Chaisongkaew, Racha Dejchanchaiwong, Muanfun Inerb, Napawan Mahasakpan, Nobchonnee Nim, Hisam Samae, Panich Intra, John Morris, Thammasin Ingviya, Thanathip Limna, Perapong Tekasakul
Summary: This study evaluated the impact of PM2.5 transport from peatland fires in Indonesia on air quality in Thailand. PM2.5 samples were collected at four sites in the lower southern part of Thailand during 2019-2020. The analysis showed that during the haze period, PM2.5 concentrations and certain chemical components such as organic carbon and polycyclic aromatic hydrocarbons increased significantly compared to the normal period. Backward trajectories confirmed that the main source of PM during the haze period was peatland fires in Sumatra, Indonesia.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Woranuch Deelaman, Chomsri Choochuay, Siwatt Pongpiachan
Summary: This study analyzed the concentration, sources, and health risks of polycyclic aromatic hydrocarbons (PAHs) in paddy grain in Thailand and Laos. The main source of PAHs was found to be incomplete combustion of petroleum products, such as industrial fuels and vehicle exhausts. Agricultural waste burning and transportation emissions were identified as the main sources of PAHs. The study also indicated that the cancer risk levels from ingestion and dermal exposure were within acceptable limits in both countries.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Ye Huang, Jinze Wang, Nan Fu, Shanshan Zhang, Wei Du, YuanChen Chen, Zhenglu Wang, Meng Qi, Wei Wang, Qirui Zhong, Yonghong Duan, Guofeng Shen, Shu Tao
Summary: Indoor biomass burning produces large amounts of small particles and hazardous contaminants, leading to severe air pollution and potentially high health risks associated with inhalation exposure. Personal samplers provide more accurate estimates of inhalation exposure. The study found that high molecular weight PAHs enriched in smaller particles resulting in much higher risks associated with PAHs inhalation exposure.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Environmental Sciences
Khushboo Sharma, Pramod Kumar, Jayant Sharma, Satkar Deep Thapa, Aparna Gupta, Rajeev Rajak, Bidyutjyoti Baruah, Amit Prakash, Rakesh Kumar Ranjan
Summary: The present study aims to measure PM2.5 and polycyclic aromatic hydrocarbons (PAHs) in the ambient atmosphere of the Sikkim Himalaya to understand the influence of natural and anthropogenic activities on aerosol loading and their chemical characteristics. The study found that the seasonal mean concentrations of PM2.5 and PAHs were high during autumn and low during summer season. The high concentrations of PAHs were mainly attributed to heavy traffic activities, with other possible sources being fossil fuel combustion and biomass burning.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Weiqian Wang, Qingyue Wang, Daisuke Nakajima, Senlin Lu, Kai Xiao, Tanzin Chowdhury, Miho Suzuki, Fenwu Liu
Summary: The study in the Baoshan area of Shanghai focused on examining the chemical characteristics, sources, and health risks associated with fine particle-bound Polycyclic Aromatic Hydrocarbons (PAHs). The results revealed that PAHs, mainly originating from petroleum combustion and diesel emissions, were more concentrated in PM1.1 particles, especially during late summer. The study also identified stationary and diesel emissions as the main PAH sources, with air masses mainly derived from marine sources across the local industry area in late summer.
Article
Environmental Sciences
Hao Zeng, Lei Zhang, Feize Sun, Jiajia Liu, Bo Fang, Wenqi Yang, Chunyan Meng, Manman Wang, Qian Wang, Yulan Hao
Summary: The study identified four potential sources of PM2.5-bound PAH(18) as industrial emissions (44%), petroleum volatilization (30%), vehicle emissions (15%), and coal combustion (11%). The average inhalation bioaccessibility of PAHs ranged from 17.8% (dibenzo [a,h] anthracene) to 67.9% (fluorene). The ILCR values indicated that children and teenagers had lower cancer risks from inhalation of PAHs during all seasons, while adults exceeded the acceptable threshold in winter. Source identification and bioaccessibility evaluations are crucial for accurately assessing the health risks of PM2.5-bound PAHs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
J. A. Casquero-Vera, H. Lyamani, G. Titos, M. C. Minguillon, L. Dada, A. Alastuey, X. Querol, T. Petaja, F. J. Olmo, L. Alados-Arboledas
Summary: A new method was proposed to determine the contributions of primary vehicle exhaust and biomass burning particles to aerosol number concentrations, showing differences in particle contributions between urban and suburban sites. Urban sites have higher aerosol number concentrations compared to suburban sites, while biomass burning particles contribute more to black carbon levels in suburban areas. The traditional method used in the study leads to an overestimation of primary vehicle exhaust particles concentrations in both urban and suburban sites.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Baile Xu, Fei Liu, David Alfaro, Zhou Jin, Yingying Liu, Yuan Liu, Zhiyong Zhou, Jiamei Zhang
Summary: Coal combustion and vehicular exhaust were identified as the major sources of polycyclic aromatic hydrocarbons (PAHs) in road dust samples in a typical coal-utilization city. The study found significant variations in PAH concentrations among different zones, with children around the power plant facing the highest cancer risk. Further scientific investigations are needed to assess the carcinogenic risks posed by PAHs in road dust and other environmental matrices.
Article
Environmental Sciences
Can Ye, Chaoyang Xue, Pengfei Liu, Chenglong Zhang, Zhuobiao Ma, Yuanyuan Zhang, Chengtang Liu, Junfeng Liu, Keding Lu, Yujing Mu
Summary: This study observed high concentrations of H2O2 in a polluted rural site in the North China Plain and identified biomass burning, fertilization, and ambient particles as significant contributors to H2O2 production. These special factors were found to affect the regional atmospheric oxidizing capacity and the global sulfate aerosol formation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Yan Chen, Yanhua Wang, Kangkang Yu, Zihan Zhao, Xiulu Lang
Summary: This study investigated the occurrence and temporal variations in the fluxes and compositions of n-alkanes and polycyclic aromatic hydrocarbon (PAHs) in sediment cores from a small catchment in western Dianchi lake, China. The results showed the ongoing organic contamination from inputs to outputs, highlighting the influence of agricultural and industrial economy on the catchment outlets.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Wei Song, Xue-Yan Liu
Summary: By measuring the concentrations and δ18O values of NO3- from the burning of five biomass materials in China, it was found that biomass combustion emissions are a potential source of atmospheric NO3- pollution and have different oxygen sources and formation mechanisms compared to secondary NO3-. Isotope mass balance modeling revealed that atmospheric O2 and biomass O contribute to the oxygen in bb-NO3-, while aqueous vapor plays a smaller role. Additionally, the oxygen source contributions of bb-NO3- were found to be influenced by the carbon, nitrogen, and oxygen contents of the biomass.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Praphatsorn Punsompong, Shantanu Kumar Pani, Sheng-Hsiang Wang, Thao Thi Bich Pham
Summary: According to the study, different regions in Thailand are affected by different types of BB, leading to varying levels of PM2.5 pollution, with forest fires being the main source of pollution. Analysis of PM2.5 exposure shows that around 79% of the population in Thailand is affected by very unhealthy and hazardous PM2.5-AQI levels.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Adewale Adeyemi, Peter Molnar, Johan Boman, Janine Wichmann
Summary: The study in Pretoria South Africa identified fossil fuel combustion and secondary sulfur as the main sources of PM2.5, with North Limpopo and Eastern Inland being the key potential source regions. Implementing effective control strategies to reduce emissions from coal burning and fossil fuel combustion could help mitigate ambient PM2.5 pollution in Pretoria.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Environmental Sciences
Yuechen Liu, Xiangxinyue Meng, Zhijun Wu, Dandan Huang, Hongli Wang, Jie Chen, Jingchuan Chen, Taomou Zong, Xin Fang, Tianyi Tan, Gang Zhao, Shiyi Chen, Liwu Zeng, Song Guo, Xiaofeng Huang, Lingyan He, Limin Zeng, Min Hu
Summary: Through experiments and observations, it was found that under dry conditions, biomass burning aerosols (BBA) are in a non-solid state, differing from secondary organic aerosols (SOA). This suggests that under dry conditions, the diffusion coefficient of gaseous molecules in BBA may be much higher than in SOA.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Bhupendra P. Singh, Krishan Kumar, Vinod Kumar Jain
Summary: Polycyclic aromatic hydrocarbons (PAHs) are commonly found in nature and are suspected to have carcinogenic and mutagenic properties. In Delhi, the concentration of both particulate- and gaseous-phase TPAHs varied among different sites, with fossil fuel and wood burnings identified as major contributors to total PAHs. The health risk values for children and adults also showed variations across different residential sites in Delhi.
AIR QUALITY ATMOSPHERE AND HEALTH
(2021)
Article
Environmental Sciences
Jianwu Shi, Yinchuan Feng, Liang Ren, Xiuqing Lu, Yaoqian Zhong, Xinyu Han, Ping Ning
Summary: The study investigated the chemical characteristics and sources of PM2.5 in Wenshan, revealing that secondary inorganic aerosols are the major contributors to PM2.5, and elements from anthropogenic sources have a high proportion in PM2.5. The research provides effective support for local governments in formulating air pollution control policies.
Article
Environmental Sciences
Jianwu Shi, Chenyang Zhao, Zhijun Wang, Xiaochen Pang, Yaoqian Zhong, Xinyu Han, Ping Ning
Summary: This study investigated the chemical characteristics and seasonal variations of PM2.5 in plateau cities on the southwest border of China. The findings revealed that during the wet season, most air masses originated from the Indian Ocean and Myanmar, while during the dry season, they mainly came from the China-Myanmar border area. The major sources of PM2.5 were identified as secondary inorganic aerosols, dust, industrial emissions, biomass burning, motor vehicle emissions, and copper smelting emissions.
Article
Environmental Sciences
Jianwu Shi, Xiaochen Pang, Yuzhai Bao, Xinyu Han, Yaoqian Zhong, Jianmin Wang, Pingwei Zhao, Feng Xiang, Shuai Li, Ping Ning
Summary: This research investigated the content of potentially toxic elements and emission characteristics of PM2.5 in soil fugitive dust in six cities in Yunnan. The study found variations in the content of potentially toxic elements in PM2.5 among different cities, which were mainly affected by metal smelting and coal burning activities. The study also highlighted the health risks posed by particle-bound potentially toxic elements for children and adults.
Article
Meteorology & Atmospheric Sciences
Yaoqian Zhong, Ping Ning, Si Yan, Chaoneng Zhang, Jia Xing, Jianwu Shi, Jiming Hao
Summary: This study uses a machine-learning method to identify and assess persistent and intensive wildland dense-fires (DFs) from the perspective of spatiotemporally integrated processes. The study reveals fixed patterns of fire occurrence and distribution, and shows the significant impact of these fires on the environment. The study also suggests a positive anthropogenic influence on the occurrence of high-density fires.
ATMOSPHERIC RESEARCH
(2022)
