Assessment of In Situ Immobilization of Lead (Pb) and Arsenic (As) in Contaminated Soils with Phosphate and Iron: Solubility and Bioaccessibility

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 土壤环境科学实验室

	Assessment of In Situ Immobilization of Lead (Pb) and Arsenic (As) in Contaminated Soils with Phosphate and Iron: Solubility and Bioaccessibility
	Du, Xin; Weng, Liping; Van Riemsdijk, Willem H.; Cui, Yanshan
刊名	WATER AIR AND SOIL POLLUTION
	2010-11
卷号	213 期号:3 页码:95-104
关键词	Immobilization Lead Arsenic Solubility Bioaccessibility
英文摘要	The effect of in situ immobilization of lead (Pb) and arsenic (As) in soil with respectively phosphate and iron is well recognized. However, studies on combined Pb and As-contaminated soil are fewer, and assessment of the effectiveness of the immobilization on mobility and bioaccessibility is also necessary. In this study, a Pb and As-contaminated soil was collected from an abandoned lead/zinc mine in Shaoxing, Zhejiang province of China, which has been treated with three phosphates, i.e., calcium magnesium phosphate (CMP), phosphate rock, and single super-phosphate (SSP) for 6 months in a field study. The ferrous sulfate (FeSO(4)) at 20 g kg(-1) was then amended to the soil samples and incubated for 8 weeks in a greenhouse. The solubility and bioaccessibility tests were used to assess the effectiveness of the in situ immobilization. The result showed that phosphates addition decreased the concentrations of CaCl(2)-extractable Pb; however, the concentrations of water-soluble As increased upon CMP and SSP addition. With the iron addition, the water-soluble As concentrations decreased significantly, but CaCl(2)-extractable Pb concentrations increased. The bioaccessibility of As and Pb measured in artificial gastric and small intestinal solutions decreased with phosphate and iron application except for the bioaccessibility of As in the gastric phase with SSP addition. Combined application of phosphates and iron can be an effective approach to lower bioaccessibility of As and Pb, but has opposing effects on mobility of As and Pb in contaminated soils.
WOS记录号	WOS:000283115200009
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21321]
专题	生态环境研究中心_土壤环境科学实验室
推荐引用方式 GB/T 7714	Du, Xin,Weng, Liping,Van Riemsdijk, Willem H.,et al. Assessment of In Situ Immobilization of Lead (Pb) and Arsenic (As) in Contaminated Soils with Phosphate and Iron: Solubility and Bioaccessibility[J]. WATER AIR AND SOIL POLLUTION,2010,213(3):95-104.
APA	Du, Xin,Weng, Liping,Van Riemsdijk, Willem H.,&Cui, Yanshan.(2010).Assessment of In Situ Immobilization of Lead (Pb) and Arsenic (As) in Contaminated Soils with Phosphate and Iron: Solubility and Bioaccessibility.WATER AIR AND SOIL POLLUTION,213(3),95-104.
MLA	Du, Xin,et al."Assessment of In Situ Immobilization of Lead (Pb) and Arsenic (As) in Contaminated Soils with Phosphate and Iron: Solubility and Bioaccessibility".WATER AIR AND SOIL POLLUTION 213.3(2010):95-104.