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首页> 外文期刊>Science of the total environment >Polycyclic aromatic compounds (PAHs, oxygenated PAHs, nitrated PAHs, and azaarenes) in air from four climate zones of China: Occurrence, gas/ particle partitioning, and health risks
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Polycyclic aromatic compounds (PAHs, oxygenated PAHs, nitrated PAHs, and azaarenes) in air from four climate zones of China: Occurrence, gas/ particle partitioning, and health risks

机译：来自中国四大气候区的空气中的多环芳族化合物（PAHS，含氧PAHS，硝化PAHS）：发生，气体/粒子分区和健康风险

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摘要

Polycyclic aromatic compounds (PACs) such as polycyclic aromatic hydrocarbons (PAHs) and their derivatives [oxygenated PAHs (OPAHs), nitrated PAHs (NPAHs), and azaarenes (AZAs)] are toxic and ubiquitous air pollutants. In this study, the concentrations of these PACs were determined in air obtained in spring and autumn of 2012 from urban and rural areas of the Tibetan Plateau, temperate, subtropical, and tropical climate zones in China. Average concentrations (gaseous + particulate) of ∑29PAHs, ∑l50PAHs, ∑11NPAHs, and ∑4AZAs were 928 ± 658,54 ± 45,53 ± 4.4,14 ± 11 ng m~(-3) and 995 ± 635,67 ± 38,8.4 ± 6.1,24 ± 16 ng m~(-3) in spring and autumn, respectively. Various C fractions and latitude correlated significantly with the concentrations and ratios of PACs. The slopes of the regression of gas-particle partition coefficients (K_p) of PACs on their sub-cooled liquid vapor pressures (P_L~O), indicated both adsorption and absorption to total suspended particles (TSP) for PAHs, OPAHs, and NPAHs in the four studied climatic zones. This result was further supported by comparing the fractions of PACs in TSP calculated from field data with those predicted by the Junge-Pankow adsorption and K_(OA) absorption models. The concentration ratios of most OPAHs or NPAHs to their parent PAHs and of benzo|e] pyrene/benzo[a]pyrene were higher in autumn than in spring and increased with remoteness from point sources. This suggests enhanced secondary formation of PAH derivatives due to the elevated photochemical activity in autumn and longer ageing of air and associated transformation of PACs during their long-distance transport from source regions (urban sites) to rural sites. Lifetime lung cancer risk estimated from PACs ranged from 0.8 ± 0.6 to 3.1 ± 1.0 (×10~(-3)), exceeding the value (10~(-5)) recommended by the WHO. Gaseous PACs contributed substantially to the estimated cancer risks and their contributions increased with decreasing latitude in China.
机译：多环芳族化合物（PACS）如多环芳烃（PAH）及其衍生物[含氧PAHS（OPAHS），硝化PAHS（NPAH）和Azaarenes（Azas）]是有毒和无处不在的空气污染物。在这项研究中，这些PACS的浓度在2012年春季和秋季的空气中，来自藏高原的城乡，温带，亚热带和热带气候区。 Σ29pahs，σl50pahs，σ11npahs和σ4azas的平均浓度（气态+颗粒）为928±658,54±45,53±4.4,14±11ng m〜（-3）和995±635,67±分别在春季和秋季38.8.4±6.1,24±16 ng m〜（3）。各种C级分和纬度随着PACS的浓度和比率显着相关。 PAC上的气体颗粒分配系数（K_P）对其亚冷液蒸汽压力（P_L〜O）的倾斜表示，对PAHS，OPAH和NPAH的全悬浮颗粒（TSP）的吸附和吸收四个研究的气候区。通过将来自现场数据计算的PACS的分数与由junge-pankow吸附和k_（OA）吸收模型预测的那些进行比较，进一步支持该结果。大多数OPAH或NPAH的浓度比在父母PAHS和苯并|芘/苯并[a]芘在秋季较高，并且随着点来源的偏远而增加。这表明由于在从源区（城市网站）到农村地区的远程运输期间，秋季和较长的空气老化和PACS相关转型的光化学活性升高，因此增强了PAH衍生物的二次形成。寿命肺癌估计的肺癌的风险范围为0.8±0.6至3.1±1.0（×10〜（-3）），超过世卫组织建议的价值（10〜（-5））。气态PACS大大贡献至估计的癌症风险，并随着中国的纬度降低而增加，他们的贡献增加。

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  • 来源
    《Science of the total environment》 |2021年第10期|147234.1-147234.12|共12页
  • 作者

    Chong Wei; Benjamin A. Musa Bandowe; Yongming Han; Junji Cao; John G. Watson; Judith C. Chow; Wolfgang Wilcke;

  • 作者单位

    Key laboratory of Aerosol Chemistry & Physics (KLACP) State Key Laboratory of Loess and Quaternary Geology (SKLLQG) Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Shanghai Carbon Data Research Center (SCDRC) CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China;

    Institute of Geography University of Bern Hallerstrasse 12 3012 Bern Switzerland Multiphase Chemistry Department Max Planck Institute for Chemistry Hahn-Meitner-Weg 1 55128 Mainz Germany;

    Key laboratory of Aerosol Chemistry & Physics (KLACP) State Key Laboratory of Loess and Quaternary Geology (SKLLQG) Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China School of Human Settlements and Civil Engineering Xi'an Jiaotong University Xi'an 710049 China;

    Key laboratory of Aerosol Chemistry & Physics (KLACP) State Key Laboratory of Loess and Quaternary Geology (SKLLQG) Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China;

    Key laboratory of Aerosol Chemistry & Physics (KLACP) State Key Laboratory of Loess and Quaternary Geology (SKLLQG) Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Desert Research Institute 2215 Raggio Parkway Reno NV 89512 USA;

    Key laboratory of Aerosol Chemistry & Physics (KLACP) State Key Laboratory of Loess and Quaternary Geology (SKLLQG) Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China Desert Research Institute 2215 Raggio Parkway Reno NV 89512 USA;

    Institute of Geography and Geoecology Karlsruhe Institute of Technology (KIT) Reinhard-Baumeister-Ptatz 1 76131 Karlsruhe Germany;

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  • 正文语种 eng
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  • 关键词

    OPAHs; NPAHs; Gas-particle partitioning; Sorption mechanism; Cancer risk;

    机译：opahs;npahs;气体颗粒分配;吸附机制;癌症风险;

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