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| Magnetic Properties of Dustfall and Its Environmental Significance in Xi'an, China |
| Zhang Junhui1, Zhang Jian2,3, Wang Xiaojing4, Wang Jin1, Xia Dunsheng5 |
1. Shaanxi Key Laboratory of Disasters Monitoring & Mechanism Simulation, Baoji University of Arts and Sciences, Baoji 721006, Shaanxi, China;
2. College of Urban and Environment, Northwest University, Xi'an 710127, China;
3. Institute of Silk Road Studies, Northwest University, Xi'an 710069, China;
4. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710120, China;
5. Ministry of Education Key Laboratory of Western China's Environmental Systems, Lanzhou University, Lanzhou 730000, China |
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Abstract Environmental magnetic measurements were carried out on the dustfall samples from Xi'an. These samples were collected in every month from January 2012 to December 2013 at XZ and XCA sites. The magnetic parameters (χlf, χARM, SIRM, FORC diagram and magnetic hysteresis parameters) indicate a relatively high concentration of ferrimagnetic minerals in Xi'an, dominated by multiple domain (MD) and pseudo-single domain (PSD) ferrimagnetic minerals. The concentration of magnetic minerals in XZ site is higher than those in XCA site, suggesting the different pollution sources in different functional district of Xi'an. The concentration of magnetic minerals has significant changes according to the seasons in each year, and the values rise from October to January of next year, and decrease in summer, which mainly not only come from the pollution of coal-burning, but also are influenced by the special topography and meteorological conditions.
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Received: 27 October 2014
Published: 20 May 2015
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2015, Vol. 35 
