隧道环境PM_(2.5)载带重金属污染特征与健康风险

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英文篇名：Characteristics and health risk assessment of heavy metal in PM_(2.5) in tunnel environment 作者：张启钧 ; 吴琳 ; 张衍杰 ; 方小珍 ; 毛洪钧 ; 吴丽萍 英文作者：ZHANG Qi-jun;WU Lin;ZHANG Yan-jie;FANG Xiao-zhen;MAO Hong-jun;WU Li-ping;Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University;Urban Transport Emission Control Research Centre, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University; 关键词：隧道测试 ; 颗粒物 ; 重金属元素 ; 健康风险 英文关键词：tunnel test;;particulate matter;;heavy metal elements;;health risks 中文刊名：ZGHJ 英文刊名：China Environmental Science 机构：天津城建大学环境与市政工程学院天津市水质科学与技术重点实验室;南开大学环境科学与工程学院城市交通污染防治研究中心环境污染过程与基准教育部重点实验室; 出版日期：2018-12-20 出版单位：中国环境科学 年：2018 期：v.38 基金：天津市教委科研计划项目(2017KJ053);; 环境污染过程与基准教育部重点实验室开放课题(2017-01);; 天津城建大学博士科研启动基金资助项目 语种：中文; 页：ZGHJ201812045 页数：7 CN：12 ISSN：11-2201/X 分类号：308-314

摘要

在南京富贵山隧道开展机动车排放的颗粒物浓度及其载带重金属元素对人群健康的影响研究,对PM_(2.5)的浓度水平与变化特征、载带重金属元素组分进行分析,并通过美国环保局(US EPA)的健康风险评价模型对重金属的健康风险进行了评价.结果表明,工作日隧道进口和出口处的PM_(2.5)质量浓度为(78.67±24.58)μg/m~3和(164.2±45.13)μg/m~3,非工作日颗粒物浓度略低于工作日.采样期间隧道出口处PM_(2.5)载带的Zn、Cu和Mn元素的浓度质量较高,受机动车污染影响较大.富集因子结果显示,隧道进出口处,Cd、Sb、Sn、Zn、Cu、Mo、Pb和As等元素的EF>10,受人为污染源排放影响,Co、Mn、Cr、Ni、V和Tl等元素EF<10,在隧道中几乎没有富集.健康风险评价结果表明,对于儿童,测试期间隧道进出口处的非致癌风险危险指数(HI)均大于1,具有非致癌风险,对于成人,测试期间隧道进出口处的非致癌风险危险指数(HI)均小于1,非致癌风险在安全范围内.但颗粒物载带的Cr和As元素致癌风险均超过EPA推荐的可接受风险阈值(10~(-6)),具有明显的致癌效应.
        In order to study pollution characteristics health risk of heavy metal elements in particulate matter from vehicle emissions, a tunnel test was conducted the Fu Gui Mountain tunnel in Nanjing, China. The concentration and characteristics of PM_(2.5), and the components of heavy metal elements were studied. The health risk of heavy metal elements in PM_(2.5) was assessed by using the international recognized health risk assessment method(US EPA). The results showed that the concentration of PM_(2.5) in the tunnel entrance and exit at workdays was(78.67±24.58) μg/m~3 and(164.2±45.13) μg/m~3, and the concentration of particulate matter on non-working days was slightly lower than the working day. During the sampling period, the concentration of Zn, Cu, and Mn in PM_(2.5) at tunnel exits was higher quality, which was greatly affected by vehicle. The enrichment factor analysis results show that the EF of the Cd, Sb, Sn, Zn, Cu, Mo, Pb, and As at the entrance and exit of the tunnel were greater than 10, which were affected by the anthropogenic sources emission. The EF of Co, Mn, Cr, Ni, V, and Tl were less than 10, which were almost no enrichment in the tunnel. The health risk assessment results showed that the non-carcinogenic risk index(HI) in the tunnel during the test period was greater than 1 for children, which had non-carcinogenic risk. For adults, the HI was less than 1, which were within safe limits. However, two heavy metal elements were carcinogenic to human body, such as Cr and As which had a significant impact on human health.

引文

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