Magnetic response to atmospheric heavy metal pollution recorded by dust-loaded leaves in Shougang industrial area,western Beijing |
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Authors: | ShouYun Hu XueMei Duan MingJie Shen U Blaha W Roesler HaiTao Yan E Appel V Hoffmann |
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Institution: | (1) State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China;(2) Graduate University of Chinese Academy of Sciences, Beijing, 100049, China;(3) Department of Geography, East China Normal University, Shanghai, 200062, China;(4) Institute for Geosciences, University of Tübingen, 72076 Tübingen, Germany;(5) Department of Geography, Shanghai Normal University, Shanghai, 200234, China |
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Abstract: | Fifty-five evergreen tree’s leaves growing less than one year were collected from Shougang industrial area in western suburb
of Beijing, including steel plants and its ambient residential areas, recreational parks and farmlands. Rock magnetic properties
and heavy metal contents were studied. The results show that the magnetic properties of leaf samples are predominated by low-coercivity
magnetite, and both the concentration and grain size of magnetite particles gradually decreased with the distance from the
main pollution source increases. Moreover, there is a significant linear relationship between magnetic parameters (the low-field
magnetic susceptibility, saturation isothermal remanent magnetization and anhysteretic remanent magnetization) and heavy metals
contents (Fe, Pb, V, Cr and Zn) (0.73⩽R⩽0.88). Hence, the magnetic parameters of leaves can serve as a proxy for quick detecting of the recent atmospheric metallic
pollution.
Supported by the National Natural Science Foundation of China (Grant Nos. 40374021, 40674033, 40172102) and DFG project (AP
34/21) |
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Keywords: | Shougang industrial area tree leaves magnetic parameters heavy metal contents |
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