电化学方法去除污泥中重金属的研究

3410201410ActaScientiaeCircumstantiaeVol．34No．10Oct．2014“948”No．2013-Z73SupportedbytheMinistryofAgriculture“948”ProjectNo．2013-Z731987—[e-mail]*[e-mail]1987—[e-mail]*[e-mail]10．13671/j．hjkxxb．2014．0676··．2014．J．34102547-2551GuZYAikebaier·YilahongTuerxun·Tuerhongetal．2014．ＲemovalofheavymetalsinsludgebyelectrochemicaltreatmentJ．ActaScientiaeCircumstantiae34102547-2551·*·8300522013-12-062014-03-312014-04-01Pb、Cd、Cu、NiPbO2/Ti、、pH．CdNiGB4284—1984CdNi．35V80mA6hCu、Pb、CdNi57．35%、48．42%、68．63%49．85%．GB4284—1984．0253-2468201410-2547-05X703AＲemovalofheavymetalsinsludgebyelectrochemicaltreatmentGUZhuyuAikebaier·Yilahong*Tuerxun·TuerhongCollegeofPractaculture＆EnvironmentalScienceXinjiangAgriculturalUniversityUrumqi830052Ｒeceived6December2013receivedinrevisedform31March2014accepted1April2014AbstractThispaperanalyzedPbCdCuandNicontentsandtheirdistributionalcharacteristicsinsludgefromHedongSewageTreatmentPlant．ThesludgewastreatedwithPbO2/TianodeandcopperplatecathodetounderstandtheeffectofvoltageandconductiontimeonthepHvalueofsludgeandremovalefficiencytoheavymetals．TheresultshowedthatCdandNicontentsinsludgeexceededtheNationalStandardGB4284—1984butCdandNiwerehigherecologicalavailable．Theremovalefficiencyofheavymetalsinsludgeconductbydifferentvoltageschangedsignificantly．Whenthevoltagewas35Vcurrentwas80mAandthereactiontimewas6hthetreatmentofsludgereachedtheoptimalbalancebetweeneffectandcost．UnderthisconditiontherateofremovalofCuPbCdandNiwas57．35%48．42%68．63%and49．85%respectively．InthiscasethecontentofheavymetalintheanoderegionreducedalotandmettheNationalAgriculturalStandardGB4284—1984．Keywordssludgeheavymetalsremovingefficiencyelectrochemicaltreatment1Introduction．．、、、、2010．、Smith2000．20122005200720072010．、．、、．34Abdelwahabetal．20092009Diagneetal．200720062008．、．、、．PbO2/Ti、、、．2Materialsandmethods2．1515g·L－1．1004℃．2．2．10cm100cm2105cm215cm6cmPbO2/TiJB-3ALWJ-2B．1．1Fig．1Electrolysispretreatmentstructure2．3+HClO40．1mol·L－1、、TessierTessieretal．1979．15g·L－1．2．4DHG-9070pHpHs-3CpHTAS-990．3Ｒesultsanddiscussion3．151．5T1、T2、T3、T4T55T1＞T2＞T3＞T4＞T5T1T2Maizetal．2000T1、T2、T3Adriano2001．．T4．T5T5．15Pb、Cd、CuNi45.00、8．00、95．57158．35mg·kg－1《》GB4284—1984CdNipH＜6.5Cd≤5mg·kg－1、Ni≤100mg·kg－1CdNi355．00%1Table1Heavymetalsindifferentchemicalphasesofsludgemg·kg－1PbCdCuNiT12．100．902．7825．81T26．201．808．6917．49T39．011．701．4730．26T46．891．045．3118．37T520．802．6037．3266．4245．008．0095．57158．3584521046．45%．．．3．210h2．2．．35V．35V80mAPb、Cd、Cu、Ni53．24%、74．38%、63．47%、58．62%．2Table2Ｒemovalrateofheavymetalsinsludgeunderdifferentvoltages/VPbCdCuNi2035．42%62．36%55．38%36．72%2545．36%68．68%58．74%43．39%3050．98%72．37%61．35%52．48%3553．24%74．38%63．47%58．62%4053．65%75．21%64．18%60．37%3．3pH35V80mA0、3．3、6．6、10cmpH．pH2．2pHpH．1hpHpH=5．60．H2O→1/2O2+2H++2e－M2++2e－→MH+pH．pHpHpH．6h3．3cm6．6cmpH．MOH2+2H+→M2++2H2O2H++2e－→H2↑OH－pHH+OH－．10hpH2．80pH11．45．．2pHFig．2VariationsofpHinthesludgeunderelectrochemicaltreatment3．410h3．31CuPb．．3Table3Heavymetalsindifferentchemicalphasesofsludgemg·kg－1PbCdCuNiT13．710．345．628．41T21．530．161．945．74T32．300．141．185．71T41．160．214．6010．25T512．691．1321．5732．6420．851．9834．9162．75．T1T2945234T1、T2、T3．3Pb、Cd、CuNi333．57%、32．32%、25．06%31．65%．．3．53．31h．2h．．4hH+．2～3h．5hpH．pH10．0．．．3Cu2+、Pb2+、Cd2+、Ni2+Fig．3VariationsofCu2+Pb2+Cd2+andNi2+contentsindifferentareas055210．6hCu、Pb、Cd、Ni57．35%、48．42%、68．63%、49．85%．Cu、Pb、Cd、Ni29．42%、28．74%、31．78%、31．39%．．35V80mA6h1m35．6．38．9%1m3．4Conclusions1CdNi、、．．2．3．35V80mA6hCu、Pb、Cd、Ni57．35%、48．42%、68．63%、49．85%．·1963—[e-mail]als1632/3711-716AdrianoDC．2001．TraceelementsinTerrestrialEnvironmentsBiogeochemistryBioavailabilityandＲisksofMetals2ndeditionM．NewYorkSpringer-Verlag．29-167DiagneMOturanNOturanMA．2007．ＲemovalofmethylparathionfromwaterbyelectrochemicallygeneratedFenton'sreagentJ．Chemosphere665841-848．2008．D．．1-46．2007．J．392181-189MaizIArambarriIGarciaＲetal．2000．EvaluationofheavymetalavailabilityinpollutedsoilsbytwosequentialextractionproceduresusingfactoranalysisJ．EnvironmentalPollution11013-9．2010．J．28452-55．2005．J．442111-115SmithSＲ．2000．ArecontrolsonorganiccontaminantsnecessarytoprotecttheenvironmentwhensewagesludgeisusedinagricultureJ．ProgressinEnvironmentalScience22129-146TessierACampbellPGCBissonM．1979．SequentialExtractionprocedureforthespeciationofparticulatetracemetalsJ．AnalyticalChemistry517844-851．2010．J．33596-101．2006．J．291134-36．2007．J．12112-115．2012．D．．1-72．2009．J．256599-6021552