Nitro and oxy-PAHs bounded in PM2.5 and PM1.0 under different weather conditions at Mount Tai in Eastern China: Sources, long-distance transport, and cancer risk assessment
Nitro and oxy-PAHs bounded in PM2.5 and PM1.0 under different weather conditions at Mount Tai in Eastern China: Sources, long-distance transport, and cancer risk assessment
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中国东部泰山不同天气条件下 PM2.5 和 PM1.0 中的硝基和氧基多环芳烃：来源、长途运输和癌症风险评估
DOI：
10.1016/j.scitotenv.2017.11.200
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发表时间：
2018-05-01
影响因子：
9.8
通讯作者：
Wang, Wenxing
中科院分区：
文献类型：
--
作者：
Gao, Ying;Yang, Lingxiao;Wang, Wenxing
采用GC-MS/MS法分析了泰山大气PM2.5和PM1.0中的14种硝基多环芳烃和5种氧代多环芳烃。85%的硝基多环芳烃和65%的氧化多环芳烃在PM1.0中被发现。PM2.5中硝基多环芳烃的组合浓度在与生物质燃烧相关的空气质量中最高（270.50 pg/m3），与重污染日（93.21 pg/m3）和清洁日（81.22 pg/m3）的测量值相比。PM1.0的测量也反映了类似的趋势。9-FO、9，10-ANQ和1-NALD是泰山PM2.5和PM1.0中含量最高的氧化型多环芳烃。2 + 3 N-FLA浓度在重污染日和生物质燃烧日显著高于其他物种，9 N-ANT浓度在生物质燃烧日显著高于其他物种。二次生成的硝基多环芳烃也更活跃的生物质燃烧期间。硝基多环芳烃的主要生成途径是与OH自由基反应，但NO3自由基在夜间也起重要作用。终身癌症风险增量（ILCR）在生物质燃烧期间最高，表明生物质燃烧对人类健康有重大影响。通过分析不同气象条件下的后向轨迹聚类结果，确定华北平原大面积秸秆焚烧是本次监测期间泰山地区硝基和氧代多环芳烃的主要来源。(c)2017爱思唯尔B. V.保留所有权利。
Fourteen nitro-PAHs and five oxy-PAHs associated with PM2.5 and PM1.0 were analyzed by GC-MS/MS at Mount Tai, China. 85% of the nitro-PAHs and 65% of oxy-PAHs were found in PM1.0. The combined concentration of nitro-PAHs in PM2.5 was highest in air masses associated with biomass burning (270.50 pg/m(3)) compared with measurements from heavily polluted days (93.21 pg/m(3)) and clean days (81.22 pg/m(3)). A similar trend was also reflected in measurements of PM1.0. 9-FO, 9,10-ANQ, and 1-NALD were the most abundant oxy-PAHs in both PM2.5 and PM1.0 at Mount Tai. The concentration of 2 + 3 N-FLA was markedly increased compared with other species on heavily polluted days and biomass burning days, and 9 N-ANT was more concentrated in measurements from days with biomass burning emissions. Secondary generation of nitro-PAHs was also more active during periods with biomass burning. The main formation pathway of nitro-PAHs during the sampling campaign was through reactions with OH radicals, but NO3 radicals also played a significant role at night. The incremental lifetime cancer risk (ILCR) was highest during periods with biomass burning, indicating that biomass burning has a significant impact on human health. By analyzing the results of back trajectory clustering under different meteorological conditions, we determined that a large area of straw burning in the North China Plain (NCP) was the dominant source of nitro and oxy-PAHs at Mount Tai during the measurement campaign. (c) 2017 Elsevier B.V. All rights reserved.