Spatial pollution characteristics and magnetic response of surface soil heavy metals in Jinchuan mining area
WANG Guan1, XIN Qian1, MA Li-juan2, WANG Yang-yang1, YAO Wen1, ZHU Xin-yu1, REN Fei-fan3
1. School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. School of Resources, Environment and Engineering, East China University of Science and Technology, Shanghai 200237, China; 3. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
Abstract：26surface soil samples were collected from the Jinchuan mine area. Environmental magnetism and heavy metal element (Cu, Ni, Cr, Fe, Sr, Ti, Pb and Mn) content analysis were related analysis on the samples, and carried out by using single factor pollution index and Nemero pollution index evaluation methods to evaluate the heavy metal pollution degree. The magnetic characteristics of the surface soil and the content of heavy metal elements showed obvious spatial distribution differences:mine area> outer processing area> high traffic section> gate area> other areas. The samples were contaminated up to100% by Cu and Ni, showing the high levels of pollution. While metal pollution of Cr, Pb, Ti, and Sr was between the warning line and moderate pollution. Then, the values of χl、SIRM、χARM and HIRM were relatively high, indicating that the content of magnetic mineral particles was extremely high, and the magnetic particles were dominated by ferrimagnetic mineral types. The magnetic grain size characteristics of the surface soil samples were dominated by coarser pseudo-monodomain (PSD) and multi-domain (MD) particles. Correlation analysis results were shown that there was an excellent correlation between Cu、Ni、Cr、Fe、Pb and Mn, especially, the correlation of Cu、Ni was excellent (R=0.91) among them. χlf, SIRM, and χARM had an excellent correlation with various metals(0.52≤R≤0.78), it showed that the heavy metal pollution of urban surface soil was effectively monitored by magnetic parameters, quickly delineating the area and scope of heavy metal pollution, and providing rapid and effective data support for urban surface soil pollution monitoring.
王冠, 辛倩, 马丽娟, 王阳阳, 姚文, 朱鑫钰, 任非凡. 金川矿区表土金属空间污染特征及磁学响应[J]. 中国环境科学, 2021, 41(9): 4211-4220.
WANG Guan, XIN Qian, MA Li-juan, WANG Yang-yang, YAO Wen, ZHU Xin-yu, REN Fei-fan. Spatial pollution characteristics and magnetic response of surface soil heavy metals in Jinchuan mining area. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(9): 4211-4220.
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