干旱区生态环境知识资源中心(Arid): Geochemical Characteristics and Trace Metal Speciation of Soils in Major Source Area of Asian Dust

Arid

DOI	10.9719/EEG.2012.45.1.009
	Geochemical Characteristics and Trace Metal Speciation of Soils in Major Source Area of Asian Dust
	Lee, Pyeong-Koo; Youm, Seung-Jun; An, Gi-O
通讯作者	Lee, PK
来源期刊	ECONOMIC AND ENVIRONMENTAL GEOLOGY
ISSN	1225-7281
EISSN	2288-7962
出版年	2012
卷号	45 期号:1 页码:9-21
英文摘要	In this study, we investigated the chemical characteristics of soils collected from the several deserts and loess in China known as the typical source areas of Asian dust (the Taklamakan desert, the Alashan desert, the Ordos desert and the Loess Plateau). Based on our analysis, we examined the possibility of adverse effects on environments and human health. In each desert and loess, major elemental compositions of soils did not show large variations, implying that the long-periodic mixing of soils in each area made their chemical compositions homogeneous. Minor elements of soils in each desert and loess showed more complicated patterns with strong correlations each other (e. g., Cr, Cu, As, Co, Ni, V, Y, Sc, Sn, Pb, Zn, Cd, Cs, Li, Th, U). These results thus enable us to discriminate the soil of the Loess Plateau from those of the other deserts in China. The results of sequential extraction experiments for soils showed that the chemical speciation of Fe was dominant in residual fraction (> 85%) in all deserts and loess, but the fractions of Mn and Ca chemical speciations were very different in each area. In the case of Mn, the fraction of amorphous Fe-Mn hydroxides (55.4%) in the Central Loess Plateau and the carbonate fraction (33.8%) in Taklamakan desert were higher as much as 2 to 5 times than other deserts. The chemical speciations of Ca are dominant in carbonate fraction in Taklamakan (75.9%) and Alashan (50.5%) deserts, but carbonate fractions of Ca in the Loess Plateau and Ordos deserts were low (6.6% and 2.1%, respectively). According to the mobility of trace elements inferred from the results of sequential extraction procedure, we could classify them into five groups, and the mobility of Cd, Pb and Cu are more than 87%, 33% and 30%, respectively. Therefore, Cd, Pb and Cu in soils of deserts and loess could be easily dissolved when interacted with surface water. As such, they could give adverse effects on surficial environments and human health.
英文关键词	Asian dust source areas soils of desert & loess geochemical characteristics
类型	Article
语种	其他
开放获取类型	Bronze
收录类别	ESCI
WOS记录号	WOS:000439560000002
WOS类目	Geology
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/330199
作者单位	[Lee, Pyeong-Koo; Youm, Seung-Jun; An, Gi-O] Korea Inst Geosci & Mineral Resources, Geol Environm Div, Daejeon, South Korea
推荐引用方式 GB/T 7714	Lee, Pyeong-Koo,Youm, Seung-Jun,An, Gi-O. Geochemical Characteristics and Trace Metal Speciation of Soils in Major Source Area of Asian Dust[J],2012,45(1):9-21.
APA	Lee, Pyeong-Koo,Youm, Seung-Jun,&An, Gi-O.(2012).Geochemical Characteristics and Trace Metal Speciation of Soils in Major Source Area of Asian Dust.ECONOMIC AND ENVIRONMENTAL GEOLOGY,45(1),9-21.
MLA	Lee, Pyeong-Koo,et al."Geochemical Characteristics and Trace Metal Speciation of Soils in Major Source Area of Asian Dust".ECONOMIC AND ENVIRONMENTAL GEOLOGY 45.1(2012):9-21.