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时间:2019-03-08
《电动修复对cd污染土壤肥力的影响》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、维普资讯http://www.cqvip.com农业环境科学学报2006,25(2):340—344JournalofAgro-EnvironmentScience电动修复对Cd污染土壤肥力的影响句炳新,申哲民,吴旦,陈学军,王文华(上海交通大学环境科学与]_=程学院,上海200240)摘要:以上海潮土为对象,研究了电动力学(1V·em一1)对土壤肥力的影响。修复前后测量的指标有土壤有机质(SOM)、pH、电导率(EC)、氧化还原电位(ORP)、有效N、速效P、速效K。结果表明,cd浓度约为100mg-kg的模拟污染土壤经电动力学处理60h后,cd的平均去除效率为68%。土壤中
2、有效N、速效P和速效K分别平均提高为原来的1.45、4.25和3.29倍,同时Toe增加了3.96%。总之,电动力学修复后,土壤的肥力有了明显提升,表明电动力学在有效去除土壤中cd的同时还能提升土壤的肥力,是一种可行的土壤修复技术。关键词:cd污染;电动力学修复;土壤肥力;有效氮;速效磷;速效钾;有机质中图分类号:X53文献标识码:A文章编号:1672—2043(2006)02—0340—05EnhancementofSoilFertilitybyElectrokineticRemediationofCalcareousSoilSpikedwithCadmiumJUBing-x
3、in,SHENZhe.min,WUDan,CHENXue-jun,WANGWen.hua(SchoolofEnvironmentalScienceandEngineering,ShanghaiJiaotongUniversity,Shanghai200240,China)Abstract:Thereisgrowinginterestinthepotentialofapplyinganelectricfieldtosoilinordertomoveandstimulatethedegradationofcon—taminants,butthereiSlittleknowledge
4、concerningimpactsofthemethodonsoilfertility.Theeffeetsofeleetrokinetiesf1V·cm1onsoilfer—tilitywasstudied.Soilorganicmatter(SOM),pH,electricalconductivity(EC),oxidationreductionpotential(ORP),availablenitrogen(N)。availablephosphorusfP),availablepotassium(K)weremonitoredbeforeandafterremediati
5、on.After60hofeleetrokineticremediation,pHandECinereasedgraduallyfromanodetocathode,butORPdecreasedgraduallyfromanodetocathode.Meanwhile,cadmiumfCd)eoneen—trationinCd—spikedsoilwasabout100mg·kg~,indicatingthattIlemeanremovalof68%.AvailableN.PandKvaluesinthesolHnereasedto1.45,4.25,and3.29times
6、ofinitialinaverage。respectively,andTOCalSOinereasedby3.96percent.Overal1.therewaganobservedin—creaseinsoilfertilityanerEKremediation.TheresuItsofthisstudyprovidedevidencethattheapplicationofelectrokinetiesCallremovethecadmiuminCd-spikedsoileficiently,andinthemeantime,enhancetIlefertilityofth
7、esoil,thusendorsingitsvalidityasaviablesoilreme—diationtechnology.Keywords:cadmiumpollution;electrokineticremediation;soilfertility;availablenitrogen;phosphorus;potassium;organicmatter20世纪9O年代初,我国污灌农田已扩大到1.4×性,降低土壤中生化过程的速度,明显抑制土壤有机10hm,其中cd污染耕地1.3x
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