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EDDS应用于Cu/Zn污染土壤电动处理的基础研究

Keywords: ,,EDDS,电动处理,污染土壤

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Abstract:

重金属污染土壤的修复是当前的热点研究课题。通过研究可降解有机络合剂EDDS对铜矿区Cu/Zn污染土壤中Cu和Zn最适的浸提时间和浸提液的pH范围,并在此基础上初步研究了将EDDS应用于该污染土壤的电动处理过程。结果表明,24h浸提时间和pH5~8的EDDS浸提液可对污染土壤Cu和Zn的浸提率分别达到25%和10%以上;电动处理过程中用EDDS预先饱和土壤有利于Cu和Zn的溶解,但由于电渗流方向与EDDS及其络合物的迁移方向相反从而不利于EDDS络合物从土柱中的移出;同时较低用量的EDDS对土壤Cu和Zn的电动去除效果不明显。可见,诸多因素影响着EDDS在Cu/Zn污染土壤电动修复中的应用。

References

[1]  郑喜坤,鲁安怀,等.土壤中重金属污染现状与防治方法[J].土壤与环境,2002,11(1):79-84.
[2]  Acar Y B,Alshawabkeh A N.Principles of electrokinetic remediation[J].Environ Sci Techrol,1993,27(13):2638-2647.
[3]  Probstein R F,Hicks R E.Removal of contaminants from soils by electric fields[J].Science,1993,260:498-503.
[4]  Alshawabkeh A N,Yeung A T,Bricka M R.Practical aspects of In-situ electrokinetic extraction[J].J Environ Eng,1999,125(1):27-35.
[5]  Virkutyte J,Sillanpaa M,Latostenmaa P.Electrokinetic soil remediation-critical overview[J].The Science of Total Environment,2002,289(1-3):97-121.
[6]  Bostjan K,Domen L.Chelator induced phytoextraction and in situ soil washing of Cu[J].Environ Pollu,2004,132:333-339.
[7]  Finzgar N,Kos B,Lestan.Washing of Pb contaminated soil using[S,S]ethylenediamine disuccinate and horizontal permeable barriers[J].Chemosphere,2004,57:655-661.
[8]  Susan T,Karin B,Roland M,et al.Extraction of heavy metal from soil using biodegradable chelating agents[J].Environ Sci Technol,2004,38(3):937-944.
[9]  Lukas H,Susan T,Rainer S,et al.Column extraction of heavy metals from soils using biodegradable chelating agent EDDS[J].Environ Sci Technol,2005,39(17):6819-6824.
[10]  Luo C L,Shen Z G,Li X M.Enhanced phytoextraction of Cu,Pb,Zn and Cd with EDTA and EDDS[J].Chemosphere,2005,59:1-11.
[11]  仓龙,周东美,陈海峰,等.一种土壤溶液原位连续采集装置[P].专利,CN1881996A.
[12]  Zhou D M,Deng C F,Cang L,et al.Electrokinetic remediation of a Cu-Zn contaminated red soil by controlling the voltage and conditioning catholyte pH[J].Chemosphere,2005,26:519-527.
[13]  鲁如坤.土壤农业化学分析方法[M].北京:中国农业科技出版社,2002.
[14]  Zhang S Z,Shan X Q.Speciation of rare earth elements in soil and accumulation by wheat with rare earth fertilizer application[J].Environ Pollu,2001,(112):395-405.
[15]  陈海峰,周东美,仓龙,等.垂直电场对EDTA络合诱导铜锌植物吸收及其迁移风险的影响[J].土壤学报,2007,待刊.
[16]  Reed B E,Berg M T,Thompson J C,et al.Chemical conditioning of electrode reservoirs during electrokinetic soil flushing of Pb-contaminated silt loam[J].J Environ Eng,1995,121(11):805-815.
[17]  Reddy K R,Danda S,Saichek R E.Complicating factor of using ethylenediamine tetraacetic acid to enhance electrokinetic remediation of multiple heavy metals in clayey soils[J].J Environ Eng,2004,130(11):1357-1366.

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