反萃预分散支撑液膜技术回收电镀废水中铬离子的研究顾瑾

。。、、[1-3]。LiquidmembraneLM“”。SLMELM。SLM。SLM、。ELM、ELM、、ELM。、“”HLM“”[4]HFSLM-SD。。HFSLM-SD、[5-6]-。-2-D2EHPA---、、、、。112221.2141222.3100272-D2EHPA---PPHFSLM-SD。、、、。1.0mol·L-10.053MPa4.0L·h-13.0L·h-15h96%。。HFSLM-SDD2EHPATQ028.8A1000-3770(2009)09-064-0[e-mail]35920099TECHNOLOGYOFWATERTREATMENTVol.35No.9Sep.,200964DOI:10.16796/j.cnki.1000-3770.2009.09.02011.178HW-3pHPh/ISE868ORIONJMX120/0.6PL203-Spectrumlab54。、、、、-2-D2EHPA、TBP、、、62.3mg·L-1。PP470μm75μm143.7nm0.45。1.2[7]。1q=C0-CtC0×100%1qC0Ctt-。1.3PPPP。。PP。。1。。1.4HFSLM-SD。2Cr6+(aq)+3(RH)2(org)→CrR6(org)+6H+(aq)23CrR6(org)+6H+(aq)→Cr6+(aq)+3(RH)2(org)3。aqorgRH2D2EHPA。22.1。pH1～13、。PP。1h62.3mg·L-162.1mg·L-11%PPPP。2.2。D2EHPATBP。。pH
 1HFSLM-SDFig.1Experimentalsetup65。30%、50%、70%、100%D2EHPATBP2。2D2EHPATBP。D2EHPAD2EHPATBP。D2EHPA30%、50%、70%、100%3。370%100%D2EHPA-70%。2.3。。pHpH。pH。、、4。430%15%。、、。2.45。3[H+]。[H+]。5。1.0mol·L-190%1.0mol·L-1[H+]1.0mol·L-1。2.5。。203040506070809010011050556065707580859095100
 3Fig.3Effectofdifferentdiluentsonextraction012345102030405060708090

h4Fig.4Effectofdifferentstripsonextraction01234530405060708090
h5Fig.5Effectofconcentrationofstriponextraction2Fig.2Effectofdifferentextractantsonextraction20304050607080901001100102030405060708090100
 35966Δp≥0.04MPa。。PPpcLaplace-Young4pc=2γcosθr4pcγθr。pc0.06MPa。6Δp0.053MPa0.053MPaΔp0.067MPa0.067MPaΔppc[8]。2.6。7、82.5～4.0L·h-14.0L·h-13.0L·h-1。、。Re2000。。[9-10]。4L·h-13L·h-1。2.7。。5。P=nA1A2×100%5PnA1A2。8.3%、16.67%、33.14%、49.70%4。16.67%。16.67%。01234530405060708090
h6Fig.6Effectofpressureonextraction01234565707580859095
h7Fig.7Effectoffeedvolumeflowonextraction0123456065707580859095100
h8Fig.8Effectofstrippingvolumeflowonextraction67RECOVERYOFCHROMIUMLONIONUSINGHYBRIDLIQUIDMEMBRANETECHNOLOGYFROMPLATINGWASTEWATERGuJin1,WangFangfang1,ZhangLin2,ZhouZhijun2,ChenHuanlin2（1.SchoolofChemicalandMaterialsEngineering,JiangnanUniversity,Wuxi214122,China;2.DepartmentofChemicalandBiologicalEngineering,ZhejiangUniversity,Hangzhou310027,China）Abstract:RecoveryofCr6+fromitsaqueoussolutionthroughahollowfibersupportedliquidmembrane/stripdispersionsystem(HFSLM-SD)containingdi(2-ethylhexyl)phosphoricacid(D2EHPA)carrierdissolvedinkerosenehadbeenstudied.Theeffectofstrippingconcentration,pressure,feedandstrippingvolumeflows,packingratioontheperformanceofHFSLM-SDhadbeeninvestigated.UndertheconditionofHClconcentrationof1.0mol·L-1instripphase,pressureof0.053MPa,feedvolumeflowof4.0L·h-1,strippingvolumeflowof3.0L·h-1,therecoveryofCr6+wasupto96%,whentheoperationcontinues5hours.Thestabilityoftheliquidmembranehadalsobeenevaluated.Itwasobservedthatorganicphasewasstillmaintainedinthesupportmembranepore,andtherecoveryofCr6+wasstable.Keywords：HFSLM-SD;D2EHPA;complexextraction;Cr6+2.8。59。9D2EHPAPP。3PP-2-D2EHPA、HFSLM-SD、、HFSLM-SD。HFSLM-SD-2-、7/31.0mol·L-10.053MPa4.0L·h-13.0L·h-1HFSLM-SD62.3mg·L-196%5D2EHPA。[1],,.[J].,2005(3):107-111.[2],.[J].,2004(2):69-71.[3].[J].,2007(21):322.[4]WSWHo.Combinedsupportedliquidmembrane/stripdispersionprocessfortheremovalandrecoveryofmetals:US,6350419[P].2002-02-26.[5]DHe,XLuo,CYang,etal.StudyoftransportandseparationofZn(II)byacombinedsupportedliquidmembrane/stripdispersionprocesscontainingD2EHPAinkeroseneasthecarrier[J].Desalination,2006(194):40-51.[6]SGu,YYu,DHe,etal.ComparisonoftransportandseparationofCd(II)betweenstripdispersionhybridliquidmembrane(SDHLM)andsupportedliquidmembrane(SLM)usingtri-n-octylamineascarrier[J].SeparationandPurificationTechnology,2006(51):277-284.[7]《》.[M].4.:,2002.[8]FZha,AFane,CFell,etal.Criticaldisplacementpressureofasupportedliquidmembrane[J].JournalofMembraneScience,1992(1):69-80.[9]FZha,AFane,CFell,etal.Instabilitymembranesofsupportedliquidmembranesinphenoltransportmodel[J].JournalofMembraneScience,1995,10(7):59-74.[10]WSHo,BWang.Strontiumremovalbynewalkylphenyl-phosphonicacidsinsupportedliquidmembraneswithstripdispersion[J].IndustrialandEngineeringChemistryResearch,2002(3):381-388.9Fig.9Studythestabilityofliquidmembrane051015202565707580859095100
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