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《重金属-有机复合污染土壤的电动强化修复研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、农业环境科学学报2010,29(6):1098-1104JournalofAgro—EnvironmentScience重金属一有机复合污染土壤的电动强化修复研究樊广萍1,一,仓龙z,徐慧2,一,周东美2,周立祥1(1.南京农业大学资源与环境学院,南京210095;2.土壤与农业可持续发展国家重点实验室,中国科学院南京土壤研究所,南京210008;3.山东师范大学人口·资源与环境学院,济南250014)摘要:许多污染场地都呈现重金属和有机污染物叠加的趋势,给修复带来了困难和挑战。以红壤为供试土壤,以铜和芘为代表性污染物,研究了添加表面活性剂羟丙基一B一环糊精
2、(HPCD)和氧化剂H20:对电动修复该复合污染土壤的影响,其目的是实现重金属和有机污染物的同时去除。结果表明,在所有的处理中。芘和铜都有向阴极迁移的趋势;当提高土柱的pH时降低了芘的氧化和降解,同时也阻碍了土壤中铜的迁移和去除;阳极加10%HPCD,阴极控制酸性条件pH3.5有助于土壤中污染物的解吸和迁移,芘和铜的去除率分别可达到51.3%和80.5%;由于H:0:的不稳定性,添加6%H:0:并未明显提高芘和铜的去除率。关键词:电动修复;表面活性剂;复合污染;重金属;多环芳烃;红壤中图分类号:X53文献标志码:A文章编号:1672—2043(2010)06
3、—1098--07EnhancedElectrokineticRemediationofHeavyMetals—.organicPollutantsCompoundContaminatedRedSoilsFANGuang-pin910CANGbn92,XUHui∞,ZHOUDong-mei2,ZHOULi-xian91(LCollegeofResourcesandEnvironmentalScience,NanjingAgriculturalUniversity,Naming210095,China;2.StateKeyLaboratoryofSoiland
4、SustainableAgriculture,InstituteofSoilScience,ChineseAcademyofSciences,Naming210008,China;3.CollegeofPopulation,Re一$onreeandEnvironment,ShandongNormalUniversity,Ji’nan250014,China)Abstract:Thousandsofsitesarecontaminatedwithbothheavymetalsandorganiccompounds,whichbroughtthedifficul
5、tiesandchallengestosoilremediation.Previousstudieshadshownthatelectrokinetic(EK)remediationtechnologyhaspotentialtoremoveheavymetalsandor-garliccompoundssimultaneously.Inthispaper.redsoilwasselectedasatestsoilanditWasspikedwithpyreneandcopperataconcentrationof500mg·kg~tosimulatetyp
6、icalcompoundpollutants.Theimpactofthebiosurfactanthydroxypropyl-lB-cyclodextrin(HPCD)andoxidantH202ontheEKremediationofcompoundpollutedsoilwithpHcontrolwasstudied.Avoltagegradientof1V·em一1wasappliedforallthetestsof15daysduration.Inallthetests,bothpyreneandcopperhadthetrendofmigrati
7、ngtowardsthecathode.Theresultsshowedthatin—creasingsoilpHreducedtheoxidationanddegradationofpyreneandhinderedtheremovalofcopper.Thetreatmentof10%HPCDandcon—trollingcatholytepHat3.5wasefficientforthedesorptionandmigrationofcontaminants,andtheremovalrateofpyreneandcopperreached51.3%a
8、nd80.5%,respectively.Theus
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