Spatiotemporal characteristics and Monte Carlo simulation-based human health risk of heavy metals in soils from a typical coal-mining city in eastern China

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Xiangyue Pan, Xinrui Weng, Lingyu Zhang, Fang Chen, Hui Li, Yunhua Zhang
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Abstract

Mining activities typically discharge considerable amounts of heavy metals into the environment, raising concerns about soil metal pollution, environmental security, and human well-being. Therefore, a systematic regional-scale investigation of soil heavy metal pollution in mining areas is necessary for soil management. In this study, 5817 soil samples from the Huainan coal mining area collected for studies conducted from 2000 to 2021 were compiled to quantify the pollution level and spatiotemporal variation of heavy metals (Cu, Pb, Zn, Cr, Cd, As, Hg, Ni, and Mn). The associated ecological health risk of heavy metals in soil was assessed using the Hakanson ecological hazard index, Monte Carlo simulation in conjunction with the total hazard quotient, and the hazard index. Cd was the top contaminant, followed by Hg. In terms of spatial distribution, heavy metal contamination was more severe in the eastern area of Fengtai and Datong districts, because these districts of Anhui Province are significant industrial regions. In addition, the results of the Monte Carlo evaluation of human health risks showed that the total noncarcinogenic risk of heavy metals in soil is below the acceptable level, while the carcinogenic risk was 5.97% for adults and 15.53% for children. As accounted for 57.4% of noncarcinogenic risk, Cr contributed 36.1% of carcinogenic risk. Compared with adults, children are more vulnerable to the carcinogenic and noncarcinogenic risks posed by heavy metals, with oral consumption being the primary exposure route. This research can provide useful details for protecting the environment and managing soil in a coal mining area.

Abstract Image

中国东部典型煤矿城市土壤中重金属的时空特征和基于蒙特卡罗模拟的人体健康风险
采矿活动通常会向环境中排放大量重金属,引起人们对土壤金属污染、环境安全和人类福祉的关注。因此,有必要对矿区土壤重金属污染进行区域范围的系统调查,以利于土壤管理。本研究收集了 2000 年至 2021 年淮南煤矿开采区的 5817 份土壤样本,对重金属(铜、铅、锌、铬、镉、砷、汞、镍和锰)的污染水平和时空变化进行了定量分析。采用哈坎森生态危害指数、蒙特卡罗模拟与总危害商数和危害指数对土壤中重金属的相关生态健康风险进行了评估。镉是最大的污染物,其次是汞。从空间分布来看,安徽省丰台区和大通区东部地区的重金属污染较为严重,因为这两个地区是重要的工业区。此外,蒙特卡洛人体健康风险评估结果表明,土壤中重金属的总非致癌风险低于可接受水平,成人致癌风险为 5.97%,儿童致癌风险为 15.53%。砷占非致癌风险的 57.4%,铬占致癌风险的 36.1%。与成人相比,儿童更容易受到重金属致癌和非致癌风险的影响,而口服是儿童接触重金属的主要途径。这项研究可为煤矿开采区的环境保护和土壤管理提供有用的细节。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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