Heavy metal speciation and risk assessment in dry land and paddy soils near mining areas at Southern China

Environmental Science and Pollution Research International
Guannan LiuXinhui Liu

Abstract

Heavy metal contamination of soils has been a long-standing environmental problem in many parts of the world, and poses enormous threats to ecosystem and human health. Speciation of heavy metals in soils is crucial to assessing environmental risks from contaminated soils. In this study, total concentrations and speciation of As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn were measured for agricultural soils near mines along the Diaojiang River in Guangxi Zhuang Autonomy Region, China. The sources of heavy metals in soils also were identified to assess their effect on speciation distribution of soil heavy metals. Furthermore, the speciation distribution of Cd and Zn, main soil heavy metal pollutants, in dry land and paddy soils were compared. Results showed that there were two severely polluted regions near mine area reaching alarming pollution level. As, Cd, Pb, and Zn were more affected by mining activities, showing very strong pollution level in soils. The mean percentage of exchangeable and carbonate fraction was highest and up to 46.8 % for Cd, indicating a high environmental risk. Greater bioavailable fractions of As, Cd, Cu, Mn, Pb, and Zn were found in soils heavily polluted by mining activities, whereas Cr and Ni as geogenic elemen...Continue Reading

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Citations

Jan 28, 2017·Environmental Toxicology and Pharmacology·Jiali ChengQifei Huang
Mar 24, 2018·International Journal of Environmental Research and Public Health·Samuel Che Nde, Manny Mathuthu
Jan 25, 2018·Environmental Geochemistry and Health·Maida Sljivic HusejnovicBiljana Antonijevic
Sep 29, 2018·International Journal of Environmental Research and Public Health·Baocui LiangJunhong Bai
Jun 18, 2017·Environmental Science and Pollution Research International·Naghmeh SoltaniMohamad Reza Ahmadi
Jan 27, 2019·Environmental Monitoring and Assessment·Mariana Consiglio KasemodelValéria Guimarães Silvestre Rodrigues
Aug 9, 2019·International Journal of Environmental Research and Public Health·Zhongbin LiaoYongtao Li
Mar 16, 2019·International Journal of Environmental Research and Public Health·Gang LiangXinhui Liu
Apr 17, 2021·Environmental Science and Pollution Research International·Haibo WangYongfeng Jia
Jul 30, 2020·Journal of Environmental Management·Yifan TangJiangang Han

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