Source apportionment and health risk assessment of heavy metals in soil for a township in Jiangsu Province, China
Source apportionment and health risk assessment of heavy metals in soil for a township in Jiangsu Province, China
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DOI：
10.1016/j.chemosphere.2016.11.088
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发表时间：
2017-02-01
期刊：
影响因子：
8.8
通讯作者：
Cao, Hongbin
中科院分区：
文献类型：
--
作者：
Jiang, Yanxue;Chao, Sihong;Cao, Hongbin
人类活动对土壤重金属污染有很大影响。从中国江苏南部一个典型的农村工业城镇采集的 105 个土壤样品中检测到 15 种金属元素。其中，铅、铜、锌、砷、铬、镉、镍7种重金属被纳入居民通过土壤吸入、皮肤接触和/或直接/间接摄入的健康风险评估。利用所有金属元素数据集，结合地统计分析、土地利用调查和产业成分分析，通过正矩阵分解的方法定量分配其潜在来源。此外，首次评估了土壤中重金属来源造成的健康风险。结果表明，土壤中Cr、Cu、Cd、Pb、Ni、Co富集，污染程度为轻度。成人和儿童的总危险指数分别为3.62和6.11，总癌症风险分别为9.78×10(-4)和4.03×10(-4)。也就是说，土壤金属造成的非致癌和致癌风险都高于可接受的水平。 Cr 和 As 需要特别注意，因为 Cr 和 As 的健康风险均超出了可接受的水平。摄入本土农产品是造成高风险的主要原因。潜在来源分为：a）垃圾焚烧和纺织/印染行业（28.3%），b）自然资源（45.4%），c）交通排放（5.3%），d）电镀行业和畜禽养殖（21.0%）。四种来源的健康风险分别占总风险的23.5%、32.7%、7.4%和36.4%。 (C) 2016 年由爱思唯尔有限公司出版。
Human activities contribute greatly to heavy metal pollution in soils. Concentrations of 15 metal elements were detected in 105 soil samples collected from a typical rural-industrial town in southern Jiangsu, China. Among them, 7 heavy metals lead, copper, zinc, arsenic, chromium, cadmium, and nickel were considered in the health risk assessment for residents via soil inhalation, dermal contact, and/or direct/indirect ingestion. Their potential sources were quantitatively apportioned by positive matrix factorization using the data set of all metal elements, in combination with geostatistical analysis, land use investigation, and industrial composition analysis. Furthermore, the health risks imposed by sources of heavy metal in soil were estimated for the first time. The results indicated that Cr, Cu, Cd, Pb, Ni, and Co accumulated in the soil, attaining a mild pollution level. The total hazard index values were 3.62 and 6.11, and the total cancer risks were 9.78 x 10(-4) and 4.03 x 10(-4) for adults and children, respectively. That is, both non-carcinogenic and carcinogenic risks posed by soil metals were above acceptable levels. Cr and As require special attention because the health risks of Cr and As individually exceeded the acceptable levels. The ingestion of homegrown produce was predominantly responsible for the high risks. The potential sources were apportioned as: a) waste incineration and textile/dyeing industries (28.3%), b) natural sources (45.4%), c) traffic emissions (5.3%), and d) electroplating industries and livestock/poultry breeding (21.0%). Health risks of four sources accounted for 23.5%, 32.7%, 7.4%, and 36.4% of the total risk, respectively. (C) 2016 Published by Elsevier Ltd.