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当前位置:首页 > 商业/管理/HR > 质量控制/管理 > 化学沉降和硅藻土吸附法处理高浓度电镀含锌废水的研究王代芝
,(,435002),,,。,、、,,,,,。、、,,。[1-2]。3,、[3-6]。:,,,Zn2+;Zn2+Freundlich,q=0.3523Ce0.1746,,,1/n0.1~0.5,,。Zn2+GB8978—1996《》,。:;;;:X703.1;X781.1:A:%1009-2455(2011)05-0023-05Treatmentofhighconcentrationzinc-containingelectroplatingwastewaterbychemicaldepositionanddiatomiteadsorptionWANGDai-zhi,ZHOUMo(CollegeofChemistryandEnvironmentalEngineering,HubeiNormalUniversity,Huangshi435002,China)Abstract:Usingchemicaldepositionanddiatomiteadsorptioncombinedprocesstotreathighconcentrationzinc-containingwastewater,withdiatomiteasrawmaterial,sodiumhydroxideasneutralizer,thealkalinesolutiondosagewhenthebesttreatmenteffectwasobtained,andtheinfluencingfactorsandoptimalconditionforZn2+adsorptionbydiatomitewerediscussedrespectively.TheadsorptionofZn2+bydiatomitefittheFreundlichmode,theadsorptionisothermequation:q=0.3523Ce0.1746,whichwasakindofsingle-layeradsorption,andthecharacteristicsalsofittherelationshipbetweenadsorptionquantityandadsorptionheatderivedfromunevensurfaceadsorptiontheory.Thecharacteristicconstant1/nliesbetween0.1-0.5,theadsorptionpropertywasgoodandtheprocesswaseasytocarryout.ThemassconcentrationofZn2+intheeffluentwatermetthespecificationforgrade1inGB8978—1996IntegratedWastewaterDischargeStandard,whichindicatedthatthewastewatertreatmentefficiencywasimproved.Keywords:diatomite;chemicaldeposition;adsorption;highconcentrationzinc-containingelectroplatingwastewater:(T201007):2011-07-15;:2011-08-01INDUSTRIALWATER&WASTEWATERVol.42No.5Oct.,2011·23·INDUSTRIALWATER&WASTEWATERVol.42No.5Oct.,20111pHFig.1EffectofpHvalueonwastewatertreatment8.08.59.09.510.010.5pHρ(Zn2+)/(mg·L-1)86420ρ(SS)/(g·L-1)543210Zn2+SS,。,,pH,,,Zn、Pb、Sn、Al,pH,,pH,。,,,。,,,。(70℃),,,Hg。,,,。Zn2+,Zn(OH)2,ZnO,Zn(NO3)2ZnCl2,。,,,,,,“”,,,。11.1JJ-4。1.2,,pH6.5,Zn2+289mg/L。1.3Zn2+,,,。1.4Zn2+[7]。:pH4.0~5.5,Zn2+,,。-535nm。Zn2+,,Zn2+,y=0.442x+0.0014。22.1pH100mL7250mL,10%NaOH,pH7.0、8.0、8.4、9.0、9.5、10.0、10.4,,,,1。NaOH,Zn2+Zn(OH)2,NaOH,Zn(OH)2ZnO22-,ZnO22-,Zn(OH)2NaOHNa2ZnO2pH。1,pH8.4,Zn2+,SS,Zn2+,Na2ZnO2,pH8.4。NaOHpH8.4,,,,pH8.4,Zn2+6.6mg/L。Zn(OH)2,,Zn2+6.6mg/L,pH7.6,,,。2.2100mL6250mL,0.2g/L,·24·2Fig.2Effectoftimeonadsorptionefficiency010203040506070/minZn2+/%10090807060503Fig.3Effectofdiatomitedosageonadsorptionefficiency00.10.20.30.4/(g·L-1)Zn2+/%10080604020110r/min10、20、30、40、50、60min,,,2。,Zn2+,Zn2+,,Si-AlNa+Ca2+Zn2+[8]。,。,30min,30min,Na+Ca2+,,,。30min。2.3100mL6250mL,0.05、0.10、0.15、0.20、0.25、0.30g/L,110r/min30min,,,3。Zn2+[9]:Zn2++(Diat)n-葑(Zn-Diat)2-n(1)K=[(Zn-Diat)2-n]/([Zn2+][(Diat)n-](2):K———;[Zn2+]———Zn2+,mg/L;[(Diat)n-]———,mg/L;[(Zn-Diat)2-n]———Zn2+,mg/L。,Zn2+,,Zn2+。,,K,,Zn2+,。0.2g/L,,,0.2g/L。2.4pH100mL6250mL,10%NaOH10%HClpH,6.5、7.5、8.4、9.5、10.5、11.5,0.2g/L,110r/min30min,,,4。4,pH。pH,。NaOH,pH8.4,Zn(OH)2,HClpH6.5、7.5,Zn2+,H+,H+Zn2+,,Zn2+4pHFig.4EffectofpHvalueonadsorptionefficiency6789101112pHZn2+/%1009080706050,:·25·INDUSTRIALWATER&WASTEWATERVol.42No.5Oct.,20115Fig.5Effectoftemperatureonadsorptionefficiency152025303540/℃Zn2+/%10090807060506Zn2+Fig.6EffectofinitialconcentrationofZn2+onadsorptionefficiency05101520Zn2+/(mg·L-1)Zn2+/%10090807060507FreundlichFig.7Freundlichadsorptionisotherm024681012/(mg·L-1)/(mg·g-1)0.60.50.40.30.20.1y=0.3523x0.1746。pH,,Zn(OH)2,,,,,,、。4,pH9.5,pH6~9,pH9.5,,pH8.4。2.5100mL6250mL,0.2g/L,15、20、25、30、35、40℃110r/min30min,,,5。5,Zn2+。,[9-11],,,Zn2+,。,Zn2+。,,,。2.6Zn2+Zn2+3.81、6.35、9.53、12.70、15.24、19.05mg/L,100mL6250mL,0.2g/L,30min,,,6。6,Zn2+Zn2+。(3.81mg/L),Zn2+,100%,(19.05mg/L),Zn2+46.7%。,Zn2+,,Zn2+,Zn2+,Zn2+,,,Zn2+,Zn2+,。Zn2+289mg/L、pH6.5,pH8.4,Zn2+6.97mg/L。100mL(pH8.4)250mL,0.2g/L,110r/min30min,,,Zn2+0.39mg/L,Zn2+94.4%,GB8978—1996《》。2.7Freundlich[q=kCe1/n]2.6,7。·26·7,Zn2+Freundlich,,,1/n0.1~0.5,,[12]。3(1)pH,,pHZn2+,,。pH6~9,pH8.4。(2)Zn2+Freundlich,,,,。(3),GB8978—1996,。:[1],.[M].:,2000.[2],,.[J].(),2004,24(4):438-443.[3],.[J].,1997,27(01):35-37.[4],,,.Zn2+[J].,2008,39(4):69-72.[5],,,.[J].,2004,35(5):1-5.[6].[J].,2001,29(2):301-307.[7]《》.()[M].:,2002.[8]RidhaA,AderdourH,ZineddineH,etal.Aqueoussilver()adsorptiononalowdensityMoroccansilicate[J].AnnChimSciMat,1998,23(1):161-164.[9],,,.[J].,1998,14(1):47-52.[10]ChangTW,WangMK.Adsorptionofcopperinthedifferentsorbent/waterrationsofsoilsstems[J].WaterAirandSoilPollution,2002,138(1/4):199-209.[11],,,.[J].,1996,12(4):356-360.[12],,.()[M].:,2007.:(1970-),,,,,,()wdz5446@163.com。,:···············································《》11《》2011111。《》970,、、、、、、,。《》“、、”3,“、、”3,“、、”3。《》,。,,“、、”;,、;,,《》,;,。·27·
本文标题:化学沉降和硅藻土吸附法处理高浓度电镀含锌废水的研究王代芝
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