英文论文
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文献类型
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Journal article (JA)
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题名
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Changes in source contributions to the oxidative potential of PM2.5 in urban Xiamen, China
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作者
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Li, Jia-Min; Zhao, Si -Min; Miao, Qi-Yu; Wu, Shui-Ping; Zhang, Jie; Schwab, James J.
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作者单位
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[Li, Jia-Min; Zhao, Si -Min; Miao, Qi-Yu; Wu, Shui-Ping] Xiamen Univ, Fujian Prov Key Lab Coastal Ecol & Environm Studie, Xiamen 361102, Peoples R China. [Li, Jia-Min; Zhao, Si -Min; Miao, Qi-Yu; Wu, Shui-Ping] Xiamen Univ, Coll Environm & Ecol, Ctr Marine Environm Chem & Toxicol, Xiamen 361102, Peoples R China. [Zhang, Jie; Schwab, James J.] SUNY Albany, Atmospher Sci Res Ctr, Albany, NY 12226 USA.
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通讯作者地址
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Xiamen Univ, Fujian Prov Key Lab Coastal Ecol & Environm Studie, Xiamen 361102, Peoples R China.; Xiamen Univ, Coll Environm & Ecol, Ctr Marine Environm Chem & Toxicol, Xiamen 361102, Peoples R China.
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Email
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wsp@xmu.edu.cn
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ResearchID
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ORCID
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期刊名称
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Journal of Environmental Sciences (China)
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出版社
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SCIENCE PRESS
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ISSN
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1001-0742
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出版信息
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2025-03, 149 ():342-357.
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JCR
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影响因子
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ISBN
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基金
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Science and Technology Pro- gram of Fujian Province, China [2023R1014002]; Na- tional Natural Science Foundation of China [41471390]
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会议名称
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会议地点
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会议开始日期
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会议结束日期
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关键词
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Coal; Ships
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摘要
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The toxicity of PM2.5 does not necessarily change synchronously with its mass concentration. In this study, the chemical composition (carbonaceous species, water-soluble ions, and metals) and oxidative potential (dithiothreitol assay, DTT) of PM2.5 were investigated in 2017/2018 and 2022 in Xiamen, China. The decrease rate of volume-normalized DTT (DTTv) (38%) was lower than that of PM2.5 (55%) between the two sampling periods. However, the mass-normalized DTT (DTTm) increased by 44%. Clear seasonal patterns with higher levels in winter were found for PM2.5, most chemical constituents and DTTv but not for DTTm. The large decrease in DTT activity (84%-92%) after the addition of EDTA suggested that watersoluble metals were the main contributors to DTT in Xiamen. The increased gap between the reconstructed and measured DTTv and the stronger correlations between the reconstructed/measured DTT ratio and carbonaceous species in 2022 were observed. The decrease rates of the hazard index (32.5%) and lifetime cancer risk (9.1%) differed from those of PM2.5 and DTTv due to their different main contributors. The PMF-MLR model showed that the contributions (nmol/(min center dot m3)) of vehicle emission, coal + biomass burning, ship emission and secondary aerosol to DTTv in 2022 decreased by 63.0%, 65.2%, 66.5%, and 22.2%, respectively, compared to those in 2017/2018, which was consistent with the emission reduction of vehicle exhaust and coal consumption, the adoption of low-sulfur fuel oil used on board ships and the reduced production of WSOC. However, the contributions of dust + sea salt and industrial emission increased. (c) 2024 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
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一级学科
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Environmental Sciences
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WOS入藏号
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WOS:001202526600001
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EI收录号
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20241115721973
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DOI
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10.1016/j.jes.2024.02.003
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ESI
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收录于
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SCIE, EI
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