An integrated method of health risk assessment based on spatial interpolation and source apportionment
An integrated method of health risk assessment based on spatial interpolation and source apportionment
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基于空间插值和源解析的健康风险综合评估方法
DOI：
10.1016/j.jclepro.2020.123218
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发表时间：
2020-12-10
影响因子：
11.1
通讯作者：
Lin, Qianguo
中科院分区：
文献类型：
--
作者：
Duan, Yaxiao;Zhang, Yimei;Lin, Qianguo
土壤重金属对环境的污染已引起我国的高度关注。本文提出了一种基于空间插值和源解析相结合的健康风险评价方法，用于评价地下水对人体健康的潜在危害。优化的空间插值为源解析提供了全局质量保证，并将量化的源贡献引入健康风险评价。对苏州市西南部某炼油厂土壤中Zn、Pb、Cd、Cr、As和Ni 6种重金属进行了研究。结果表明：（1）R = 2、斜率（预测值/观测值）接近1的普通克立格法（OK）比反距离加权法（IDW）更适合于SHMs的空间分布。(2)正矩阵分解（PMF）比主成分分析-多元线性回归（PCA-MLR）表现出更好的性能（R-2更接近1和合适的源数）。PMF提取的积累SHMs的交通，自然，农业，大气沉积和工业来源。(3)砷和铬的致癌风险均超过1.0E-04，对人体健康具有潜在的危害。此外，较高的总危害指数（THI）/致癌风险（TCR）的源贡献是农业/工业，分别占3.5E-01/2.6E-04。农业和工业污染源的控制可以减少对居民的危害。介绍了SSRA的集成方法，该方法可以量化空间相关源贡献的健康风险，为类似污染区域提出有竞争力的环境风险策略。(C)2020爱思唯尔有限公司保留所有权利。
Soil heavy metals (SHMs) could cause environmental pollution, which had attracted great concern in China. In this study, a method was developed by integrating health risk assessment based on spatial interpolation and source apportionment (SSRA) to evaluate potential hazards of SHMs for human health. The optimized spatial interpolation provided global quality assurance for source apportionment, and quantified source contribution was introduced into health risk assessment. The six heavy metals of soil (Zn, Pb, Cd, Cr, As and Ni) from the electroplate factory in the southwest of Suzhou were investigated. The results of SSRA method were summarized as follows: (1) Ordinary kriging (OK) with R-2 and the slope (predicted value/observed value) closing 1 was more suitable for the spatial distribution of SHMs than inverse distance weighting (IDW). (2) Positive matrix factorization (PMF) showed better performance (R-2 closer to 1 and the suitable number of sources) than principal component analysis-multiple linear regressions (PCA-MLR). PMF extracted the accumulation of SHMs as traffic, natural, agricultural, atmosphere deposition and industrial sources. (3) The carcinogenic risks of As and Cr exceeded 1.0E-04, indicated that it would pose a potential risk to the human health. Moreover, higher total hazard index (THI)/carcinogenic risks (TCR) of source contribution was agriculture/industry, which accounted for 3.5E-01/2.6E-04, respectively. Control of agricultural and industrial sources could reduce hazard for residents. The integrated method of SSRA was reported, which could quantify the health risk of spatial related sources contribution and put forward competent environmental risk strategies for similar polluted area. (C) 2020 Elsevier Ltd. All rights reserved.