磁种凝聚磁分离技术处理含Ni2电镀废水的研究孙水裕

　　　　　　　　＊“”(200015)。,NH3-N,。(2)NH3-N、CODCrNH3-N、CODCr,。(3)、NH3-N9.8%3.3%,2。:非常感谢攀钢(集团)杨云中、张初永、杨天旺、杨凌云先生对中试的大力支持。参加试验工作的还有潘永亮、吴洪英、林齐枢、唐学凯、袁志贵等同志。1　,..,2001.21(3):149～153.2　WenYibo,ZhangMin,QianYi.BiologicaltreatmentofCoke-plantwastewaterforCODandNH3-Nremoval.WaterSciTech,1991.23:1883～1892.3　,,,..,1998.16(1):13～16.4　,,..,2000.20(4):178～181.5　ZhangMin,JooHwaYay,YiQian,etal.CokeplantwastewatertreatmentbyfixedbiofilmsystemforCODandNH3-Nremoval.WaterRes,1998.32(2):519～527.6　VandeGraafAA,BruijinP,JettenMSM,etal.Autotrophicgrowthofanaerobicammonium-oxidizaingmicro-organismsinafluidizedbedreactor.Microbiology,1996.142:2187～2196.　,,19645,,。、,30。2001-11-07-Ni2+＊孙水裕　张俊浩　刘炳基　罗少凡(,510090)　应用磁种凝聚-磁分离技术处理Ni2+电镀废水。首先进行了磁种凝聚的试验,研究了pH、磁种、聚丙烯酰胺对Ni(OH)2沉淀物与磁种凝聚成“磁性矾花”过程的影响。其次进行了从废水中脱除磁性矾花的磁分离试验,考查了磁分离器的磁场强度对磁分离过程的影响。试验结果表明,经这种方法处理后,废水中Ni2+的去除率达到99%以上,出水中Ni2+浓度为0.42mgL,而且Ni2+可以回收,磁种经酸泡后可以循环再用。　磁种凝聚　磁分离　含Ni2+　电镀废水　净化处理1　Ni2+[1～2],[3～4][5～6]。,。1969,--。70,,,80。-Ni2+,,,,,、-、。2　2.1　试验流程。,17　　　20028204DOI:10.13205/j.hjgc.2002.04.004,。,、、3,,。,-。:※※NaOHpHNi2+Ni(OH)2※(PAM)Ni(OH)2※※Ni2+,HCl,,Ni2+。,1。1　Ni2+SO2-4Cl-Na+Ca2+K+pHmg·L-1501001006.87007.0　　(Fe3O4),10μm,,99.5%。,,,。2.2　试验仪器与装置Ni2+。,,,。-。　-1—;2—;3—;4—;5—。3　Ni2+pH、、(PAM),,。:Fm=x·V·H·gradH　Fm———;x———,;V———;H———;gradH———。,:。3.1　Ni2+有效沉淀pH范围的确定Ni2+,,,,。Ni2+Ni(OH)2,PAM,,。pHNi2+,2hNi2+。,pH9.510.0,Ni2+1.75mgL0.5mgL,。Ni2+pH10.0～10.5。3.2　磁种加入对Ni(OH)2沉降性能的影响Ni(OH)2,,。,Ni(OH)2,Ni(OH)2,Ni(OH)2,Ni(OH)2,2。,。200mgL。2　Ni(OH)2pHmg·L-1cm0min1min2min4min10min30min00　0　0.20.31.14.1920002.88.124.227.128.140003.29.025.628.128.5000.10.40.93.28.31020005.112.226.228.428.940005.612.426.628.629.0　　3200mgLNi2+,,,1h,Ni2+,2h。,,Ni2+。18　　　200282043　Ni2+(pH=10)mg·L-1Ni2+mg·L-10min10min20min30min1h2h0　5012.97.023.431.100.50200503.51.701.00.360.363.3　PAM加入对Ni(OH)2沉淀物———磁种絮状物沉降性能的影响PAMNi(OH)2,,,Ni(OH)2。45PAMNi2+,0.2～0.5mgLPAM,,,60min5min,Ni2+0.50mgL0.15mgL。4　PAMNi(OH)2(pH=10,200mgL)PAMmg·L-1cm10s30s1min5min30min0　0.31.45.126.928.90.25.214.122.229.129.30.58.317.825.529.229.45　pH10PAMNi2+mg·L-1PAMmg·L-1Ni2+mg·L-10s10s30s1min5min30min60min0　0　5029.1019.6010.305.701.000.502000.2506.103.301.000.500.160.152000.5505.702.900.970.450.150.143.4　磁场强度对磁性矾花絮体脱除效果的影响6Ni2+,:Ni2+=50mgL,pH=10,=200mgL,PAM=0.5mgL,8.97mLs。,,,,,,Ni2+。1000Gs2000Gs,Ni2+2.04mgL0.42mgL,。3000Gs,Ni2+。2000Gs。6　Ni2+Gs0300600100020003000Ni2+mg·L-1509.92.122.040.420.40Ni2+%080.295.9896.099.299.13.5　磁种再生和Ni2+的回收,,,Ni(OH)2,Ni2+。,Ni2+=856mgL,Ni2+(50mgL)18,NiSO4,Ni2+98.40%。99%,。4　(1)Ni(OH)2,,-Ni2+、、。(2)-Ni2+:pH=10,=200mgL,PAM=0.5mgL,=2000Gs,HRT=28.6s,50mgLNi2+,Ni2+99%,Ni2+0.42mgL,。(3),,Ni2+NiSO4。1　,..:,1993.2　..:,1992.3　,..,1998.17(4):367～373.4　,..,1997.18(5):47～50.5　..,1998.(1):37～40.6　..,1997.16(11):24～27.　,,19655,1991,、,。2001-11-2419　　　20028204DEVELOPMENTOFCATALYTICSUPERCRITICALWATEROXIDATIONWASTEWATERTREATMENTTECHNOLOGYWuJinhuaetal(7)………………………………………………………………………Abstract　Thephysicochemicalpropertiesofsupercriticalwater(SCW)asareactionmediumandthecharacteristicsofsupercriticalwateroxidation(SCWO)arereviewed.GeneralprocessofcatalyticSCWOandthefactorsinfluencingtheprocessandtheircorrelationsarealsosummarized.Catalyticmechanism,dynamicsandtheinfluenceofwateronSCWOandthecatalyst'sdevelopmentaresummarized.Theprospectanddevelopingtrendofthistechnologyarealsodiscussed.Keywords　supercriticalwater,supercriticalwateroxidation,catalyticsupercriticalwateroxidationandcatalystCOMPARATIVETESTINGOFPOLYPROPYLENETUBULARMEMBRANEMICROFILTRATIONINROTATINGTANGENTIALFLOWWITHAXIALFLOWWangChengduanetal(11)………………………Abstract　AnewtypeofpolypropylenetubularmembranemoduleinrotatingtangentialflowwasdesignedtoexperimentallystudythepolypropylenePAtubularmembranemicrofiltrationflux.Throughtheexperimentalsystemofrotatingtangentialflowwhichwassetuptoenhancethemicrofiltration,thepolypropylenePAtubularmembranefluxesofrotatingtangentialflowandaxialflowweremeasuredunderdifferentconcentrationsofSiO2suspensionanddifferentfluidpressures.Theexperimentalresultsshowthattherotatingtangentialflowmembranemoduletoenhancemicrofiltrationisnotonlyenergy-savingbutalsosimpleinsystemstructure,andthePAtubularmembranefluxofrotatingtangentialflowis1.6～2.5timesthatoftheaxialflow.Keywords　rotatingtangentialflow,axialflow,microfiltration,polypropyleneandmembranefluxSTUDYONREMOVALOFNH3-NINCOKEPLANTWASTEWATERWITHPILOTBIO-FLUIDIZED-BEDREACTORSYangPingetal(14)………………………………………………………………………Abstract　Inthispaperthetreatmentofcokeplantwastewaterwasconductedinpilotplantusingtheanaerobic-anoxia-aerobicprocess,takingthebiologicalfluidizedbedsastheanaerobic-anoxiareactorsandtheporouspolymercarriersasimmobilizedmicrobialcarriers.Ithasbeenshownbythetestresultsthatincaseofstablerunningofthesystem,whentheaverageconcentrationsofNH3-N,CODCrandphenolintheinfluentwere539.5mgL,1488mgLand247.7mgLrespectively,theaverageconcentrationsofNH3-N,CODCrandphenolintheeffluentwereonly14.3mgL,252.4mgLand0.2mgLrespectively.Anaerobicammoniaoxidationwasdiscoveredintheanaerobic-anoxiafluidizedbedreactors.Inthissystem,NH3-Naverageremovalratesintheanaerobic-anoxiafluid