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Contamination assessment and source apportionment of heavy metals in agricultural soil through the synthesis of PMF and GeogDetector models

文献类型： 外文期刊

作者： Fei, Xufeng 1 ; Lou, Zhaohan 1 ; Xiao, Rui 3 ; Ren, Zhouqiao 1 ; Lv, Xiaonan 1 ;

作者机构： 1.Zhejiang Acad Agr Sci, Hangzhou, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Informat Traceabil Agr Prod, Beijing, Peoples R China

3.Wuhan Univ, Sch Remote Sensing & Informat Engn, Wuhan, Peoples R China

关键词： Heavy metal; Positive matrix factorization; GeogDetector models; Spatial analysis; Source apportionment

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 747 卷

页码：

收录情况： SCI

摘要： Heavy metal pollution in soils has attracted great attention worldwide in recent decades. Selecting Hangzhou as a case study location, this research proposed the synthesis application of positive matrix factorization (PMF) and GeogDetector models for quantitative analysis of pollution sources, which is the basis for subsequent soil pollution prevention and remediation. In total, 2150 surface soil samples were collected across the study area. Although the mean concentrations of As, Cd, Cr, Hg, and Pb in the soils were lower than the National Environmental Quality Standards for Soils in China, the mean contents of As and Cd were higher than their corresponding local background values by approximately 1.31 and 1.59 times, respectively, indicating that heavy metals have been enriched in topsoil. Agricultural activities, industrial activities, and soil parent materials were the main sources of heavy metal pollution in the soils, accounting for 63.4%, 19.8%, and 16.8% of the total heavy metal accumulation, respectively. Cr was derived mainly from soil parent materials (80.72%). Cd was closely associated with agricultural activities (73.68%), such as sewage irrigation and application of fertilizer. Mercury was mainly attributed to industrial activities (92.38%), such as coal mining and smelting. As was related to agricultural (57.83%) and natural (35.56%) sources, and Pb was associated with industrial (42.42%) and natural (41.83%) sources. The new synthesis models are useful for estimating the source apportionment of heavy metals in soils. (C) 2020 Elsevier B.V. All rights reserved.

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