Spatial and temporal variation in magnetic properties of street dust in Lanzhou City, China |
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| Authors: | Guan Wang DunSheng Xia XiuMing Liu FaHu Chen Ye Yu LiPing Yang JianHui Chen AiFeng Zhou |
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| Institution: | (1) Key Laboratory of the West Environmental System, Lanzhou University, Lanzhou, 730000, China;(2) Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, 730000, China |
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| Abstract: | Urban environmental problems are of increasing concern. Lanzhou is a large industrial city in Northwest China. Street dust
samples representing different temporal and spatial scales were collected for magnetic properties study. Magnetic measurements
indicate a high concentration of magnetic minerals in Lanzhou street dust, dominated by pseudo-single domain (PSD) magnetite.
The concentration of magnetic materials is distinctly high in winter and spring, low in autumn. Similarly, higher concentrations
associated with heavy industry, concentrated residential development, and vehicular traffic suggest mixed contributions of
magnetic material from both anthropogenic and natural sources. x
If and SOFT% are effective magnetic parameters that denote seasonal differences among magnetic properties in street dust, convenient
and economical methods for monitoring street dust pollution.
Supported by the National Natural Science Foundation of China (Grant Nos. 40571147 and 40401064) |
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| Keywords: | environmental magnetism urban pollution street dust Lanzhou |
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