Magnetic properties and heavy metal pollution of soils in the vicinity of a cement plant,Xuzhou (China) |
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| Institution: | 1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;2. Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California, Los Angeles, Los Angeles, CA 90095, United States;3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;1. State Key Laboratory of Earth Surface Processes and Resource Ecology, MOE Engineering Research Center of Desertification and Blown-sand Control, Faculty of Geographical Science, Beijing Normal University, Xinjiekouwai Street 19, Beijing 100875, China;2. Hebei Engineering Research Center of Geographic Information Application, Institute of Geographical Sciences, Hebei Academy of Sciences, Xi Street 94, Shijiazhuang, Hebei Province 050011, China |
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| Abstract: | This study characterized the magnetic property and levels of heavy metals of the topsoils near a cement plant. The concentrations of five selected heavy metals (Pb, Cu, Zn and Cd) were measured on 32 topsoil samples (0–20 cm) collected near a cement plant via inductively coupled plasma/mass spectroscopy (ICP-MS). The orders of enrichment factors (EF), on average, were Cd (7.3) > Cu (3) > Zn (2.9) > Pb (2.1), respectively. A self-organizing map (SOM) was applied to the concentrations of heavy metals for “correlation hunting”. Mineral magnetic concentration parameters, such as the specific magnetic susceptibility (χ), susceptibility of anhysteretic remanent magnetization (χARM), saturation isothermal remanent magnetization (SIRM), together with interparametric ratios (such as IRM? 100mT/SIRM, SIRM/χ, χARM/SIRM) show that ferrimagnetic, superparamagnetic (SP) and multi-domain (MD) minerals dominated the soils. The results of correlation analysis indicate that copper showed a significant correlation with χ, χARM and SIRM but such a relationship with χ, χARM and SIRM was only weakly identified for Zn, Cd and Pb. |
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