中国东部特大城市南京环境PM2.5氧化电位特征及来源解析

IF 3.6 4区环境科学与生态学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Environmental Pollutants and Bioavailability Pub Date : 2023-02-15 DOI:10.1080/26395940.2023.2175728

Lu Zhang, Xin Hu, Si-si Chen, Yijun Chen, Hongzhi Lian

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Characterization and source apportionment of oxidative potential of ambient PM2.5 in Nanjing, a megacity of Eastern China

ABSTRACT Oxidative potential (OP) reflects integratedtoxicity of PM2.5. Therefore, OP of PM2.5 samples collected from traditional central and suburban areas (Gulou and Xianlin) in Nanjing, a megacity of China, from Jan. 2020 to Jun. 2021 was analyzed by using two abiotic assays, DTT and AA assays (OPDTT and OPAA). Values of OPDTTv and OPAAv were 0.82 ~ 3.82 and 0.15 ~ 2.22 nmol/min/m3, respectively. The OP values of PM2.5 samples collected from the Xianlin were higher than those from the Gulou by using both the DTT assay and the AA assay in this study, suggesting the seasonal and spatial variation. Moreover, OP values analyzed by using DTT assay were higher than those by using AA assay. Based on Positive Matrix Factorization (PMF), the major pollution source of the OP of PM2.5 in Nanjing was combustion source. This study may be helpful for evaluating adverse health risks of PM2.5 in a megacity.

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来源期刊

Environmental Pollutants and Bioavailability Chemical Engineering-Chemical Health and Safety

CiteScore

4.30

自引率

3.00%

发文量

审稿时长

13 weeks

期刊介绍： Environmental Pollutants & Bioavailability is a peer-reviewed open access forum for insights on the chemical aspects of pollutants in the environment and biota, and their impacts on the uptake of the substances by living organisms. Topics include the occurrence, distribution, transport, transformation, transfer, fate, and effects of environmental pollutants, as well as their impact on living organisms. Substances of interests include heavy metals, persistent organic pollutants, and emerging contaminants, such as engineered nanomaterials, as well as pharmaceuticals and personal-care products as pollutants.