含铬电镀废水的资源化处理李岩

61121*1./4300742.435005。pH、、。pH1.660%4.0g/L170r/mint=90min533.1mg/LCr530.0mg/L[Cr]42.9mg/L0.01mg/L。Cr2O329.5%。CrFZ。TCr0.94mg/L。X703A1003-6504(2009)06-0145-04ResourceRecoveryofChromiumfromElectroplatingWastewaterLIYan1LIYa-lin1ZHENGBo2DUDong-yun1*1.InstituteofEnvironmentEngineeringandScienceSchoolofChemistryandMaterialScienceHubeikeyLaboratoryforCatalysisandMaterialScienceCentralSouthUniversityforNationalitiesWuhan430074China2.PowerPlantDayeNonferrousMetalsCo.LtdHuangshi435005ChinaAbstractSodiumsulfide-reductionprecipitationprocesswasstudiedfortherecoveryofchromiumfromwastewaterproducedinelectroplatingplants.TheaffectingfactorssuchaspHdosagereactiontimeandstirringrateofchromiumrecoverywerediscussed.ResultsshowedthatundertheoptimalconditionsaspHvalue1.6dosageofsodiumsulfide60%forindustrialuse4.0g/Lofwastewaterreactiontime90minandstirringrate170r/mintheinitialconcentrationsofCrandCrcanbedecreasedfrom533.1mg/Land530.0mg/Lto42.9mg/Land0.01mg/Lrespectively.ThecontentofCr2O3inchromiumslagwas29.5%satisfactorytothereuserequirement.ForremovingresidualCrfurtherwithheavymetalchelatingagentFZorthogonaldesignwasdiscussedandtheoptimalremovalconditionswereobtained.Theconcentrationoftotalchromiumineffluentwas0.94mg/Lattheend.Keywordselectroplatingwastewaterheavymetalschelatingagentresourcerecoverychromiumslag、、、、[1]。[Cr]Cr[2]。[Cr]CrO42-、Cr2O72-HCrO4-pH[Cr][3]。[Cr]。、、。[4-6]。Cr5.0mg/L[7]。[8]1、、、2345。、、、[9]。、40m3。50%[10]。、[e-mail]*[e-mail]。EnvironmentalScience&Technology32620096Vol.32No.6Jun.200932[11]。。。。。11.1、、、、、、、、、。、、、99.9%。FZ10%。1.2722E10mm、、、SartoriuspHPB-10、DHG-9030、SHZ—DIII、AA—6300、、、。1.3[Cr]TCr、、、。SartoriuspHPB-10pH。1。22.1pH200mLpH1.0、1.2、1.4、1.5、1.6。60%0.4g。200r/min2h。[Cr]1。1pH1.6[Cr]0.01mg/L。pH1.6pH。2.2200mL60%0.6g0.8g1.0g1.2g1.4g12345。200r/min2h。。。2。1Table1DetectingresultsofrawwaterpHTCr(mg/L)Cr(mg/L)Cr()(mg/L)Zn(mg/L)Ni(mg/L)Cu(mg/L)1.571063.1530.0533.11300.26.573.662Table2TheinfluenceofdosageonchromiumslaggradepHTCr(mg/L)Zn(mg/L)Ni(mg/L)Cu(mg/L)(g)(%)13.93382.6539.50.81716.759.081.36015.624.0258.238.21.00720.035.2613.80.441.15018.246.320.371.27316.720.8g29.2%。COD。pH。、。2.3200mL0.8g200r/min30min45min60min90min120min14662。290min。0.8g90min42.9mg/L96.0%29.5%A。2.4。0.8g100r/min120r/min150r/min170r/min200r/min90min。3。23170r/min200r/min170r/min。29.5%。2.5—CrFZC≈100mg/L。C=98.4mg/L。pH。200mL。L9343。3pH5.5200mL3mLFZ10%200r/min40min。pH。。C=1.2mg/L98.8%。2.6FZ。A200mLCr3+、Zn2+FZ10%2.3mL2.4mL2.5mL2.6mL2.7mL。200r/min40min。4。4FZ10%2.6mL、0.94mg/L0.05mg/L。3pH。29%。3L934Table3OrthogonalexperimentsheetCr()(mg/L)(r/min)FZ(10%)(mL)(min)13.510036051.823.515025072.733.520014061.444.510024049.854.515016072.864.520035032.675.510015069.085.51503407.295.520026024.8K1185.9170.691.5149.5K2155.2152.6147.3174.2K384.9118.9203.2118.4k162.056.930.549.8k251.750.949.158.1k328.339.667.739.5R33.72037.218.6pH14732131。RL、SP、1BT1、BT2E100、20、20、02.5。A2。2A。2A(n=3)Table2ContentsofbisphenolAinpoolsofGuangzhouDatianShanlandfillleachatetreatmentplantn=3RLSPBT1BT2Eμg/L9840.08±102.6984.23±14.1774.49±12.86.12±2.685.35±8.3[][1]KangJHAsaiDKatayamaY.BisphenolAintheaquaticenvironmentanditsendocrine-disruptiveeffectsonaquaticorganisms[J].CritRevToxicol2007377607-25.[2]PengXWangZMaiBetal.TemporaltrendsofnonylphenolandbisphenolAcontaminationinthePearlRiverEstuaryandtheadjacentSouthChinaSearecordedbydatedsedimentarycores[J].SciTotalEnviron20073841-3393-400.[3]ZafraAdelOlmoMSuárezBetal.Gaschromato－graphic-massspectrometricmethodforthedeterminationofbisphenolAanditschlorinatedderivativesinurbanwastew－ater[J].WaterRes2003374735-742.[4]GatidouCThomaidisNSStasinakisASetal.Simulta－neousdeterminationoftheendocrinedisruptingcompoundsnonylphenolnonylphenolethoxylatestriclosanandbisphenolAinwastewaterandsewagesludgebygaschro－matography-massspectrometry[J].JChromatogrA200711381-232-41.[5]ZhangJHJiangMZouLetal.Selectivesolid-phaseextractionofbisphenolAusingmolecularlyimprintedpoly－mersanditsapplicationtobiologicalandenvironmentalsamples[J].AnalBioanalChem20063854780-786.CrpH=5.513mLFZ10%200r/min40min98.8%FZ。FZ。96.0%。[][1]XiaoFengZuchengWuXuefenChen.RemovalofmetalionsfromelectroplatingeffluentbyEDIprocessandrecycleofpurifiedwater[J].SeparationandPurificationTechnology2007572257-263.[2]YCSharma.Crremovalfromindustrialeffluentsbyad－sorptiononanindigenouslow-costmaterial[J].ColloidsandSurfacesAPhysicochem.Eng.Aspects20032151-3155-162.[3]SBabelTAKurniawan.Crremovalfromsyntheticwastewaterusingcoconutshellcharcoalandcommercialac－tivatedcarbonmodifiedwithoxidizingagentsand/orchi－tosan[J].Chemosphere2004547951-967.[4]DavidJPorterLawrenceWRaymond,GeraldineDAnas－tasio.Chromiumfriendorfoe[J].ArchivesofFamilyMedicine199985386-390.[5]SgoswamiUCghosh.StudiesonadsorptionbehavioronCrontosynthetichydrousstannicoxide[J].WaterSA2005314597-602.[6]MKobya.RemovalofCrfromaqueoussolutionsbyadsorptionontohazelnutshellactivatedcarbonkineticandequilibriumstudies[J].BioresourceTechnology2004913317-321.[7]BJAllowayDCAyres.ChemicalPrinciplesofEnviron－me