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常州春季PM2.5的氧化潜势及其来源解析

吴一昊,  崔尧嘉,  臧鑫芝,  王文强,  叶招莲

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文章导航 > 环境工程  > 2024 >  42(5): 53-61
吴一昊, 崔尧嘉, 臧鑫芝, 王文强, 叶招莲. 常州春季PM2.5的氧化潜势及其来源解析[J]. 环境工程, 2024, 42(5): 53-61. doi: 10.13205/j.hjgc.202405007
引用本文: 吴一昊, 崔尧嘉, 臧鑫芝, 王文强, 叶招莲. 常州春季PM2.5的氧化潜势及其来源解析[J]. 环境工程, 2024, 42(5): 53-61. doi: 10.13205/j.hjgc.202405007
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WU Yihao, CUI Yaojia, ZANG Xinzhi, WANG Wenqiang, YE Zhaolian. OXIDATIVE POTENTIAL AND SOURCE APPORTIONMENT OF PM2.5 DURING SPRING IN CHANGZHOU[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(5): 53-61. doi: 10.13205/j.hjgc.202405007
Citation: WU Yihao, CUI Yaojia, ZANG Xinzhi, WANG Wenqiang, YE Zhaolian. OXIDATIVE POTENTIAL AND SOURCE APPORTIONMENT OF PM2.5 DURING SPRING IN CHANGZHOU[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(5): 53-61. doi: 10.13205/j.hjgc.202405007
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常州春季PM2.5的氧化潜势及其来源解析

doi: 10.13205/j.hjgc.202405007

  • 江苏理工学院 资源与环境工程学院, 江苏 常州 213001

基金项目: 

常州重点实验室项目(CM20223017)

江苏省自然科学基金项目(BK20221405)

江苏理工学院研究生实践创新计划(XSJCX23_82)

江苏省研究生实践创新计划(SJCX21_1332)

详细信息
    作者简介:

    吴一昊(2000-),男,硕士,主要研究方向为环境污染控制。1048025322@qq.com

    通讯作者:

    叶招莲(1978-),女,教授,主要研究方向为大气中颗粒物组分分析及源解析、大气液相氧化机制研究以及工业VOCs气体治理新材料与新技术开发。bess_ye@jsut.edu.cn

OXIDATIVE POTENTIAL AND SOURCE APPORTIONMENT OF PM2.5 DURING SPRING IN CHANGZHOU

  • School of Resources and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, China

    摘要
  • 摘要: 为探究细颗粒物(PM2.5)的健康风险及其来源,采用二硫苏糖醇(DTT)法测定了常州春季PM2.5的氧化潜势(OP),用DTTv(体积归一化的DTT)和DTTm(质量归一化的DTT)表征。采用正定矩阵因子分解法(PMF)、主成分分析(PCA)联合多元线性回归(MLR)2种方法解析了DTTv的来源。结果表明:采样期间大气PM2.5的DTTv和DTTm日平均值分别为(0.83±0.09)nmol/(min·m3)和(12.52±4.22)pmol/(min·μg),处于国内相对较低的暴露水平。有机碳、二次离子(SO42-、NO3-和NH4+)和交通源特征元素(Cu、Zn等)与DTTv呈中度相关,说明二次源、交通源等对健康相关的PM暴露产生一定影响。PMF对DTTv的源解析结果也表明,交通源(40.1%)和二次源(35.6%)对DTTv的贡献高于扬尘源(18.6%)和燃烧源(5.8%),MLR-PCA解析结果进一步证实了交通源和二次源对DTTv的重要贡献。该成果可为大气污染精准防控和健康影响分析提供参考。
    Abstract: To explore health risks and sources of fine particles (PM2.5), we detected the oxidative potential (OP) of PM2.5 in spring in Changzhou using the dithiothreitol (DTT) method, and characterized it by DTTv (volume-normalized DTT consumption) and DTTm (mass-normalized DTT consumption). Two source apportionment methods including positive matrix factorization (PMF) and principal component analysis (PCA) combined with multiple linear regression (MLR), were used to resolve emission sources of DTTv. The results showed that the average daily DTTv and DTTm in PM2.5 were (0.83±0.09) nmol/(min·m3) and (12.52±4.22) pmol/(min·μg) during the sampling period, respectively, which were in the relatively lower exposure levels in China. Organic carbon, secondary ions (SO42-, NO3-, and NH4+), as well as characteristic elements of the traffic sources (Cu, Zn, etc.), correlated moderately with DTTv, suggesting both the secondary sources and traffic sources had some impact on PM exposure related to health. Source apportionment results from PMF showed that vehicle emission (40.1%) and secondary sources (35.6%) were more important contributors to DTTv in PM2.5 than dust sources (18.6%) and combustion sources (5.8%), and MLR-PCA source apportionment method further confirmed significant contribution to DTTv from vehicle emission and secondary sources. The results could provide theoretical and scientific guidance for precise prevention and control of air pollution and health effects.
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  • 收稿日期:  2023-05-06
  • 网络出版日期:  2024-07-11

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