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	Interactions of heavy metal ions with paddy soils as inferred from wien effect measurements in dilute suspensions
	Jun, Jiang; Li Cheng-Bao; Zhao An-Zhen; Xu Ren-Kou; Wang Yu-Jun; Friedman, S. P.
刊名	PEDOSPHERE
	2006-12-01
卷号	16期号:6页码:718-725
关键词	binding energy electrical conductivity field strength heavy metal ions paddy soils
ISSN号	1002-0160
通讯作者	Li Cheng-Bao(chbli@issas.ac.cn)
英文摘要	Interactions of three heavy metal ions, Cu2+, Cd2+, and Pb2+, and, for comparison, Na+ with electrodialytic clay fractions (less than 2 mu m in diameter) of four paddy soils as well as a yellow-brown soil as a control soil were evaluated based on measurements of the Wien effect in dilute suspensions with a clay concentration of 10 g kg(-1) in four nitrate solutions of 2 x 10(-4)/z mol L-1, where z is the cation valence, and a nitric acid solution of 3 X 10(-5) mol L-1. Field strengths ranging from 15 to 230 kV cm(-1) were applied for measuring the electrical conductivities (ECs) of the suspensions. The mean free binding energies between the various cations and all of the soils determined from exchange equilibrium increased in the order: Na+ < Cd2+ < Cu2+ < Pb2+. In general, the ECs of the suspensions in the sodium nitrate solution were smaller than those of the suspensions in the heavy metal solutions because of the lower electrophoretic mobility of sodium compared to the divalent cations. In terms of relative electrical conductivity-field strength relationships, relative electrical conductivity (REC) of suspensions containing various cations at field strengths larger than about 50 kV cm-1 were in the descending order: Na+ > Cu2+ > Cd2+ > Pb2+ for all tested soils. A characteristic parameter of the REC-field strength curves, Delta REC200, REC at a field strength of 200 kV cm-1 minus that at the local minimum of the concave segment of the REC-field strength curves, characterized the strength of adsorption of the cations stripped off by the applied strong electrical field, and for all soils the values of Delta REC200 were generally in the order: Na+ < Cu2+ < Cd2+ < Pb2+.
收录类别	SCI
WOS关键词	COMPETITIVE SORPTION ; ADSORPTION ; CATIONS ; CU ; SELECTIVITY ; GOETHITE ; CADMIUM ; RATES ; ZN ; CD
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000243943400005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558584
专题	南京土壤研究所
通讯作者	Li Cheng-Bao
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China 2.Agr Res Org, Inst Soil Water & Environm Sci, Volcani Ctr, IL-50250 Bet Dagan, Israel
推荐引用方式 GB/T 7714	Jun, Jiang,Li Cheng-Bao,Zhao An-Zhen,et al. Interactions of heavy metal ions with paddy soils as inferred from wien effect measurements in dilute suspensions[J]. PEDOSPHERE,2006,16(6):718-725.
APA	Jun, Jiang,Li Cheng-Bao,Zhao An-Zhen,Xu Ren-Kou,Wang Yu-Jun,&Friedman, S. P..(2006).Interactions of heavy metal ions with paddy soils as inferred from wien effect measurements in dilute suspensions.PEDOSPHERE,16(6),718-725.
MLA	Jun, Jiang,et al."Interactions of heavy metal ions with paddy soils as inferred from wien effect measurements in dilute suspensions".PEDOSPHERE 16.6(2006):718-725.

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