沉淀法处理含铜废水及其沉淀产物的表征李新颖

ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY20113142011－02－152011－04－05。1987—。[e-mail]。B604。FrancisRuzagilizaInnocent201620CaOH2、Na2CO3Na2S。CaOH2＞Na2CO3＞Na2S60minNa2CO3＞CaOH2＞Na2SCaOH2＞Na2CO3＞Na2S。CaOH2pHζNa2CO3Na2SpHζ。CaOH2CaSO4·2H2OCuONa2CO3Cu4SO4OH6·2H2ONa2SCuSCuSO4·5H2O。CaOH2。ζTQ116．2A1006－1878201104－0298－06TreatmentofCopper-ContainingWastewaterbyPrecipitationandCharacterizationofPrecipitateLiXinyingFrancisRuzagilizaInnocentChenQuanyuanXueGangSchoolofEnvironmentalScienceandEngineeringDonghuaUniversityShanghai201620ChinaAbstractThesimulatedacidiccopper-containingwastewaterwastreatedusingCaOH2Na2CO3andNa2Sasprecipitants．TheexperimentalresultsshowthatTheorderofcopperionremovalratesisCaOH2＞Na2CO3＞Na2SAfterprecipitationfor60mintheorderofsludgesedimentationvolumesisNa2CO3＞CaOH2＞Na2STheorderofthesupernatantturbiditiesisCaOH2＞Na2CO3＞Na2S．WiththeincreasingofthesolutionpHtheabsolutevalueofζpotentialofthesupernatantdecreasesforCaOH2precipitant．butincreasesforNa2CO3andNa2Sprecipitants．WhenCaOH2isusedasprecipitantthemainprecipitatesareCaSO4·2H2OandCuOWhenNa2CO3isusedasprecipitantthemainprecipitateisCu4SO4OH6·2H2OWhenNa2SisusedasprecipitantthemainprecipitatesareCuSandCuSO4·5H2O．TheadvantageofusingCaOH2asprecipitantisevident．Keywordscopper-containingwastewaterprecipitationmethodprecipitantζpotentialturbiditysludge、、、mg/L。1。、、。、、、2－4。、、、5。pH1。、·892·4．6。。。CaOH2、Na2CO3Na2Sζ、3。11．1CuSO4·5H2O、CaOH2、Na2CO3、Na2SHNO3100mm0．45μm。DHG－9123AMax－2550PCXXRDRigakuWRT－2PTGZ－2000GG317－ZetaMeter－3．0MalvernWGZ－1PHS－3CpH。1．2CuSO4·5H2O100mg/L。CaOH2、Na2CO3Na2S3min7minpH。ζ0．45μmHNO3pH2。105℃24h1mm。1．3XRDTGTG－DTG。22．1n∶nn∶n1。1CaOH2100%Na2CO3n∶n2．099．80%CuCO32－2CuCO36Na2Sn∶n2．099．89%CuSHS2－2CuSHS3－370．45μm。3CaOH2＞Na2CO3＞Na2S。2．2n∶npH2。2n∶npHCaOH2pH9．38～11．46Na2CO3pH6．00～9．92Na2SpH5．52～11．33。pH。、·992·ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY201131、57－9pH10－11。34。3pH10．00Ca2+pH10．00～14．00Ca2+pH12．60CaOH+11．50pHCaOH02。CaOH02pH9．38～11．46Ca2+、CaOH+。4Na2SpH10．04～11．33HS－。5。5aCaOH02pH7．30Cu2+CuOH+CuOH02pH7．30～11．59CuOH02CuOH－3CuOH+pH9．10CuOH0290%pH10．68～11．59CuOH02CuOH－3pH11．59CuOH－3CuOH2－4CuOH02。CaOH02pH9．38～11．46CuOH02、CuOH－3CuOH2－4CaSO4·2H2O、CuOH02CuO。5bNa2CO3、nNa2CO3∶n=1．0pH5．60～9．10CuCO03pH8．00～14．00CuOH02、CuOH－3CuOH2－4。Na2CO3pH6．00～9．92Cu2+、CuOH+、CuOH02CuCO03Cu4SO4OH6·2H2O、Cu4SO4OH6Cu2OH2CO3。Na2S、nNa2S∶n=1．0pH0～5．00CuHS+100%0CuHS02。Na2SpH5．52～11．335cCuHS02CuSHS2－2CuSHS3－312Na2SCuS。·003·4．2．3pHζpHζ6。6pHζ。CaOH2pHζζ－19．6mV－6．9mVCa2+CaOH+pHζ－6．9mV－8．3mVOH－CuOH2CuOH－3CuOH2－4CuOH2。Na2CO3pHζζ－11．43mV－33．5mV。Na2SpHζζ－13．3mV－29．0mV。pH5．52～11．33HS－CuSHS－CuSHS2－2CuSHS3－3。2．4pHpH7。7CaOH2pH60minpHNa2CO3pH60min20mLNa2SpHpH10．860min3mL。60minNa2CO316～23mLCaOH28～21mLNa2S3～8mL。Na2CO3＞CaOH2＞Na2S。CuCO3＞CuOH2＞CuSCuSCuS。2．58。835min5～60min。CaOH2＞Na2CO3＞Na2S。2．6XRD9。9CaOH2CaSO4·2H2OCuONa2CO3Cu4SO4OH6·2H2ONa2SCuSCuSO4·5H2O。·103·ENVIRONMENTALPROTECTIONOFCHEMICALINDUSTRY201131TG－DTG10。10aCaOH232～148℃148～300℃CaSO4·2H2O720～850℃CuSO4CuO。10bNa2CO334～350℃Cu4SO4OH6·2H2O350～500℃Cu4SO4OH6Cu4SO4O33H2O700～830℃CuSO4CuO。10cNa2S100℃100～350℃CaSO4650～830℃CuSO4CuO。、CaOH2。3aCaOH2、Na2CO3Na2SCaOH2＞Na2CO3＞Na2S60minNa2CO3＞CaOH2＞Na2SCaOH2＞Na2CO3＞Na2S。bCaOH2pHζζ－19．6mV－6．9mVNa2CO3pHζζ－11．43mV－33．5mVNa2SpHζζ－13．3mV－29．0mV。·203·4．cCaOH2CaSO4·2H2OCuONa2CO3Cu4SO4OH6·2H2ONa2SCuSCuSO4·5H2O。d、CaOH2。1．M．200967－151．2．J．2004303153－156．3．J．2010461247－1250．4．CdⅡ、CuⅡ、PbⅡ、ZnⅡJ．20103171566－1574．5．J．2010304327－331．6．J．2008533－37．7DemopoulosGP．Aqueousprecipitationandcrystalliza-tionfortheproductionofparticulatesolidswithdesiredpropertiesJ．Hydrometallurgy200996199－214．8AlisonEL．ReviewofmetalsulphideprecipitationJ．Hydrometallurgy2010104222－234．9StummWMorganJJ．AquaticchemistryChemicalequilibriaandratesinnaturalwaters3rdeditionC．NewYorkJohnWiley＆Sons199616－204．10BratlandDHGrongOShercliffHetal．ModellingofprecipitationreactionsinindustrialprocessJ．ActaMaterialia1997451－22．11．Cu2+－H2OJ．200727637－40．12．M．1988336－337．13LutherWRickardDTThebergeSetal．Determina-tionofbisulfidestabilityconstantsofMn2+Fe2+Co2+Ni2+Cu2+andZn2+byvoltammetricmethodsJ．EnvironSciTechnol199630671－679．櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏櫏··、、2～5mm25～100℃5～20min0．5～1．0MPa。。。/CN102000541A2011－04－06。、、4。、。。。/CN102001766A2011－04－06H2SO4NaOHpH3600～700W、5～15minH2O2pH9．5～10．0H2O2Fe2+60～90∶1。－Fenton。/CN102001780A2011－04－06·303·