High cadmium concentration in soil in the Three Gorges region: Geogenic source and potential bioavailability

	High cadmium concentration in soil in the Three Gorges region: Geogenic source and potential bioavailability
	Yizhang Liu; Tangfu Xiao; Zengping Ning; Huajun Li; Jiang Tang; Guangzhu Zhou
通讯作者	Tangfu Xiao
	2013
发表期刊	Applied Geochemistry
卷号	37 期号:1 页码:149-156
摘要	study investigated the distribution and sources of Cd in soils from a Cd-rich area in the Three Gorges region, China. The results showed that in the study area arable soils contain 0.42-42 mg kg(-1) Cd with 0.12-8.5 mg kg(-1) in the natural soils, corresponding to high amounts of Cd (0.22-42 mg kg(-1)) in outcropping sedimentary rocks in the area. Both lognormal distribution and enrichment factor (EF) plots were applied in an attempt to distinguish between geogenic and anthropogenic origins of Cd in the local soils. The lognormal distribution plots illustrated that geogenic sources dominated in soils with low and moderate Cd concentrations (<8.5 mg kg(-1)), whereas anthropogenic sources (agricultural activities, coal mining) significantly elevated Cd contents in some arable soils (>8.5 mg kg(-1)). The enrichment factor plots illustrated that the majority of the soil samples had EF values of <5, pointing to a geogenic origin of Cd in the soils, whereas some arable soils had EF values >5, pointing to an additional anthropogenic input of Cd to the soils. Sequential extraction results showed that Cd soluble in water and weak acid (water-soluble, exchangeable and carbonate fraction of the soil) accounts for an average of 31% of the total soil Cd, which indicates high potential for Cd mobility and bioavailability. The findings point to a potential health risk from Cd in areas with high geogenic background concentrations of this metal.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5038
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
通讯作者	Tangfu Xiao
推荐引用方式 GB/T 7714	Yizhang Liu,Tangfu Xiao,Zengping Ning,et al. High cadmium concentration in soil in the Three Gorges region: Geogenic source and potential bioavailability[J]. Applied Geochemistry,2013,37(1):149-156.
APA	Yizhang Liu,Tangfu Xiao,Zengping Ning,Huajun Li,Jiang Tang,&Guangzhu Zhou.(2013).High cadmium concentration in soil in the Three Gorges region: Geogenic source and potential bioavailability.Applied Geochemistry,37(1),149-156.
MLA	Yizhang Liu,et al."High cadmium concentration in soil in the Three Gorges region: Geogenic source and potential bioavailability".Applied Geochemistry 37.1(2013):149-156.

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