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	Magnetic properties of the urban soils in Shanghai and their environmental implications
	Hu, Xue-Feng; Su, Yu; Ye, Rong; Li, Xiao-Qing; Zhang, Gan-Lin
刊名	CATENA
	2007-08-01
卷号	70期号:3页码:428-436
关键词	urban topsoils Shanghai magnetic susceptibility (X-lf) heavy metals
ISSN号	0341-8162
DOI	10.1016/j.catena.2006.11.010
通讯作者	Hu, Xue-Feng(xfhu@shu.edu.cn)
英文摘要	To study the feasibility of using magnetic techniques for monitoring soil pollution in Shanghai, magnetic properties and heavy metals in the topsoils in an urban site (Songnan Town) and a less-urbanized agricultural site (Luojing Town) in Baoshan District, Shanghai, were studied. Compared with the background, magnetic signals of the urban topsoils are extremely enhanced with magnetic susceptibility (chi(lf)) from 127.3-1959 x 10(-8) m(3) kg(-1); while those of the agricultural topsoils are only slightly increased. However, both the urban and agricultural topsoils contain few pedogenic SP grains, as indicated by their low chi(fd)% (< 3.6%). Ratios of chi(arm)/SIRM, chi(arm)/chi(lf) and SIRM/chi(lf) indicate that the grain size of magnetic minerals in the urban topsoils is significantly coarser than that in the background and the agricultural topsoils. Furthermore, the urban topsoils show low coercivity and magnetic soft behaviors, as indicated by higher SOFT%, lower HARD%, higher IRM300 mT/SIRM (close to 1) and lower IRM_(200mT)/SIRW (close to -1). It suggests that the urban topsoils have received some coarse ferrimagnetic particles. Heavy metals are highly enriched in the magnetic fractions of the topsoils. Geochemical properties of the magnetic fraction of the urban topsoils are significantly different from those of the agricultural topsoils, farther indicating that the extra magnetic minerals accumulated in the urban topsoils are neither inherited from soil parent materials nor from pedogenic processes, but originate from anthropogenic activities. The significant correlations between heavy metals and chi(lf), chi(arm), SIRM, SOFT and HIRM of the topsoils in the district indicate that the magnetic techniques can be used for monitoring soil pollution in Shanghai. The soils with chi(lf) from 39-50 x 10-8 m(3) kg-1 in the district are tentatively defined as "slightly polluted soils"; those with chi(lf)> 50 x 10(-8) m(3) kg(-1) are defined as "polluted soils". (c) 2006 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	CHINESE LOESS ; SUSCEPTIBILITY MEASUREMENTS ; HEAVY-METALS ; STREET DUST ; POLLUTION ; ORIGIN ; CONTAMINATION ; ASSOCIATION ; PALEOSOLS ; LIVERPOOL
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000248715200016
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558653
专题	南京土壤研究所
通讯作者	Hu, Xue-Feng
作者单位	1.Shanghai Univ, Dept Environm Sci & Engn, Shanghai 200072, Peoples R China 2.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil Sci & Sustainable Agr, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Hu, Xue-Feng,Su, Yu,Ye, Rong,et al. Magnetic properties of the urban soils in Shanghai and their environmental implications[J]. CATENA,2007,70(3):428-436.
APA	Hu, Xue-Feng,Su, Yu,Ye, Rong,Li, Xiao-Qing,&Zhang, Gan-Lin.(2007).Magnetic properties of the urban soils in Shanghai and their environmental implications.CATENA,70(3),428-436.
MLA	Hu, Xue-Feng,et al."Magnetic properties of the urban soils in Shanghai and their environmental implications".CATENA 70.3(2007):428-436.

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