中文关键词宁东能源化工基地多环芳烃(PAHs)污染特征源解析风险评估 英文关键词Ningdong energy and chemical industry basepolycyclic aromatic hydrocarbons(PAHs)pollution characteristicssource apportionmentrisk assessment

作者	单位	E-mail
杨帆	宁夏大学生态环境学院, 银川 750021	hustamao@nxu.edu.cn
罗红雪	宁夏大学生态环境学院, 银川 750021
钟艳霞	宁夏大学生态环境学院, 银川 750021 宁夏大学西北土地退化与生态恢复省部共建国家重点实验室培育基地, 银川 750021 宁夏大学西北退化生态系统恢复与重建教育部重点实验室, 银川 750021	zhongyx_w@163.com
王幼奇	宁夏大学生态环境学院, 银川 750021
白一茹	宁夏大学生态环境学院, 银川 750021

中文摘要 为了解宁东能源化工基地核心区表层土壤多环芳烃的污染现状，按网格布点法在宁东能源化工基地核心区采集了146个代表性表层土壤样品，分析了16种优控多环芳烃（PAHs）的含量.结果表明，16种优控PAHs均检出，表层土壤中ΣPAHs含量介于ND~123.12mg·kg^-1之间，平均值为10.19mg·kg^-1；空间上存在3个PAHs高含量区，为研究区的西北部、西南部以及东部，且不同PAHs区域分异性显著；源解析表明宁东基地PAHs污染为混合源，石油污染、燃煤、交通污染及汽油源对ΣPAHs的贡献分别为39.4%、33.3%、19.2%和8.1%；质量基准与质量标准法生态风险评价表明，该区域PAHs产生的生态影响较小，出现负面生态效应的可能性较低；健康风险评价结果表明，该区域土壤PAHs对于不同年龄段的人群不存在潜在的致癌风险，主要的暴露途径是皮肤接触 > 误食 > 呼吸吸入. 英文摘要 In order to evaluate the pollution of polycyclic aromatic hydrocarbons (PAHs) in the topsoil of the core area of the Ningdong Energy and Chemical Industry Base, 146 representative topsoil samples were collected using the grid method and the contents of 16 priority PAHs were analyzed. The results showed that the content of ΣPAHs in topsoil ranged from ND to 123.12 mg·kg^-1 with an average of 10.19 mg·kg^-1. There were three high PAHs distribution areas in the northwest, southwest, and east of the core area. The source apportionment showed that the sources of PAHs in the Ningdong base were complex, and the main pollution sources were petroleum, coal combustion, traffic, and gasoline, which contributed 39.4%, 33.3%, 19.2%, and 8.1% to the total PAHs sources, respectively. The ecological risk assessment of the quality basis and quality standard method showed that the ecological impact of PAHs in the core area was slight and the possibility of negative ecological effects was low. The results of the health risk assessment showed that the order of exposure of the topsoil PAHs was skin contact > swallowing > respiratory inhalation, and the topsoil PAHs in the core area of the Ningdong base posed no potential carcinogenic risk to people of different ages.

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