Magnetic properties of urban topsoils and correlation with heavy metals: a case study from the city of Xuzhou, China |
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Authors: | Xue-Song Wang Yong Qin |
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Affiliation: | (1) Department of Chemical Engineering, Huaihai Institute of Technology, 222005 Lianyungang, Jiangsu, China;(2) College of Mineral Resources and Geo-science, China University of Mining and Technology, 221008 Xuzhou, Jiangsu, China |
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Abstract: | Heavy metals in urban topsoils have been shown to be very useful tracers of environmental pollution. Thus, their detailed studies are of great importance. Apart from expensive and time-consuming chemical methods, several simple, rapid and cheap proxy methods have been developed recently, one of them being based on rock-magnetic parameters. This examines the use of rock-magnetic methods designed to assess the degree of heavy-metal pollution of urban topsoils from the city of Xuzhou (China). The aim was to identify the magnetic properties and to link the “magnetic pollution” to the concentrations of the heavy metals. Since a strong correlation has been found between saturation isothermal remanent magnetization (SIRM) and the heavy metals, namely, Fe, Se, Ti, Sc, Ba, Bi, Pb, Cu, Zn, Cr and Mo, an anthropogenic contamination origin is thought to be the cause. The present study shows that SIRM is a fast, inexpensive and non-destructive method for the detection and mapping of heavy-metal-contaminated urban topsoils. |
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Keywords: | Urban topsoils Heavy metals Environmental magnetism Pollution SIRM Xuzhou China |
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