文献类型：期刊文献

英文题名：Atmospheric deposition of microplastics in the megalopolis (Shanghai) during rainy season: Characteristics, influence factors, and source

作者：Jia, Qilong[1,2,3];Duan, Yusen[4];Han, Xiaolin[1,2,3];Sun, Xiaodong[1,2,3];Munyaneza, Janvier[1,2,3];Ma, Jianli[5];Xiu, Guangli[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai Environm Protect Key Lab Environm Stand, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[3]Australia China Ctr Air Qual Sci & Management, Shanghai, Peoples R China;[4]Shanghai Environm Monitoring Ctr, Shanghai 200235, Peoples R China;[5]Baoshan Environm Monitoring Stn, Shanghai 201901, Peoples R China

年份：2022

卷号：847

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20223212552369);WOS:【SCI-EXPANDED(收录号:WOS:000926442800010)】；

基金：This work was supported by Shanghai Municipal Science and Technology Commission (19DZ1205001 and 20DZ1204006) and Shanghai Municipal Bureau of Ecology and Environment [2021]-46.

语种：英文

外文关键词：Microplastics; Atmospheric deposition; Megapolis; Factors; Source

摘要：Urban areas are the hardest hit by microplastic pollution, and deposition is an important part of microplastic migration and transport in the atmosphere, therefore, the study of microplastics in an urban atmospheric deposition is of great significance. This study aims to investigate the deposition characteristics of atmospheric microplastics in megapolis, to clarify the influence of meteorological and anthropogenic factors, and to analyze the sources of atmospheric microplastics. Six sampling sites in Shanghai were selected to collect atmospheric deposition samples during the rainy season. The mean deposition flux of microplastics was 3261.22 +/- 2847.99 P.m(-2).d(-1) (median: 2559.70 P.m(-2).d(-1)), and the types were mainly polyamide (PA, 27.79%), polyethylene terephthalate (PET, 27.29%), polypropylene (PP, 16.95 %), and polyvinyl fluoride (PVF, 12.88 %). The microplastic with the particle size of <1000 mu m accounted for 88.23 %, and the shape was mainly fiber (73.55%). The results of correlation analysis and variance analysis of microplastic characteristics with meteorological and anthropogenic factors (land-use, atmospheric pollutants, and urban indicators) showed that wind and precipitation had effects on deposition flux, size and shape, and were more significant at small scales (individual cities), while at large scales, the population was the main influence of microplastics. Atmospheric microplastics in Shanghai may be dominated by exogenous sources, through a combination of microplastic characteristics, wind and backward trajectories. This study further reveals the fate of urban atmospheric microplastics, which has implications for the study of global microplastic pollution.