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Magnetic Responses of Heavy Metals in Urban Topsoil of Typical Steel Industrial City, Northwest China

Wang Bo1, Xia Dunsheng1,2, Jia Jia1, Yu Ye2, Xu Shujing1   

  1. 1.Key Laboratory of Western China’s Environmental System,Ministry of Education/Lanzhou University, Lanzhou730000,China;
    2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Science, lanzhou730000,China
  • Received:2012-07-31 Online:2013-05-26 Published:2013-05-26

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Abstract:

Magnetic methods provide a fast tool for delineation of industrial pollution. 58 soil samples were collected for magnetic properties and heavy metal (Cd，Cr，Cu，Mn，Pb，V，Zn，Fe) mass fraction analysis in Jiayuguan City, Northwest of China. The results revealed that the magnetic properties of soil samples are predominated by low-coercivity magnetite, pseudo single domain (PSD)-multi domain (MD) in size, and characterized by high content of ferrimagnetic fraction and coarse particle size. Additional, as the distance increasing to steal manufactory, concentration of ferrimagnetic fraction is decreasing and the particle size is smaller. The high positive consistency is shown between heavy metal materials (Cd，Cr，Cu，Mn，Pb，V，Zn，Fe) and ferrimagnetic fraction, and low negative with magnetic particle size due to presenting nearly same particle size in magnetic fraction between pollution material and soil. So, the magnetic parameters which are related to content of magnetic fraction, just as  χlf, ARM, and SIRM, which can be used as an indicator of heavy metal pollution.

Key words: environmental magnetism, heavy metal, steel plant, Jiayuguan, pollution load index

CLC Number: 

  • X53
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