好氧颗粒污泥吸附Zn2的研究周佳恒

Zn2+甦310014Zn2+Zn2+Zn2+。。Zn2+。Zn2+X703C1000－4602201121－0080－03StudyonAdsorptionofZn2+byAerobicGranularSludgeZHOUJia-hengLIJunWEISuWANGWen-taoMAXiaoCollegeofCivilEngineeringandArchitectureZhejiangUniversityofTechnologyHangzhou310014ChinaAbstractAerobicgranularsludgewithdifferentparticlesizeswasusedforadsorptionofZn2+inwastewater．TheeffectsofparticlesizeonadsorptionunderdifferentinitialZn2+concentrationsandsludgeconcentrationswereanalyzed．TheadsorptionefficiencyofZn2+byaerobicgranularsludgewascomparedwiththatbyactivatedsludge．Theresultsshowthattheaerobicgranularsludgehasporousstructureanditsadsorptionfollowsthefirstorderkineticmodel．Thesmallergranuleshaveahigherad-sorptioncapabilitythanlargergranules．Alltheaerobicgranularsludgehaslowerdesorptionratethantra-ditionalactivatedsludgeandcanbeusedasabiosorbentfortheremovalofZn2+fromwastewater．KeywordsaerobicgranularsludgeparticlesizebiosorptionZn2+508781952008C23083。、1～3。。、。4～6。。11.1SBR1SBR。0．8～8mm·08·2721201111CHINAWATER＆WASTEWATERVol．27No．21Nov．2011SVI25～38mL/g。3。8、10、18180．88mm、10～180．88～1．7mm、8～101．7～2．36mm、82．36mm。。1Fig．1Configurationofaerobicgranule1.2HYG－ⅡZn2+AA－6300。ZnSO4·7H2O。22.10．22．5g/L250mLZn2+100mg/L60mL150mLZn2+40mg/L。25℃、150r/min1h。0．45μmZn2+2。2Zn2+Fig．2EffectofsludgesizeonZn2+adsorption2560min。0．2g/L1．53。2．5g/L1．5、3。5Q=Qeq1－e－ktQmg/gQeqmg/gtmink。0．2g/LQ=54．0691－e－0．083tR20．943、Q=74．7921－e－0．086tR20．926、Q=53．1071－e－0．084tR20．916、Q=34．8171－e－0．108tR20．960、Q=20．8621－e－0．089tR20．9962．5g/LQ=11．9031－e－0．083tR20．973、Q=12．4461－e－0．084tR20．987、Q=8．3531－e－0．084tR20．937、Q=4．5261－e－0．108tR20．926、Q=4．1821－e－0．089tR20．996。2.2。Zn2+C040mg/L。5Qeq·18·．watergasheat．comZn2+2721。Qeq、、Qeq。Zn2+Zn2+Zn2+Qeq。Qeq。、、Qeq。2.3Zn2+0．2g/L200mg/LZn2+15～75mL150mLZn2+。QeqZn2+。、Zn2+。2.40．2g/L40mg/L150mLZn2+25℃、150r/min4h150mL1h0．45μmZn2+K=Cp－C0/C0×100%KC0Zn2+、CpZn2+。3。3Fig．3Desorptioncurveofsludge38%。Zn2+。3SBRZn2+。。。。。MLSS。1Al-QodahZ．Biosorptionofheavymetalionsfromaque-oussolutionsbyactivatedsludgeJ．Desalination20061961/3164－176．2．—J．2006275960－964．3LiuYLamMCFangHH．AdsorptionofheavymetalsbyEPSofactivatedsludgeJ．WaterSciTechnol200243659－66．4．Pb2+J．200752202434－2438．5ZhengYMZhaoQBYuHQ．Adsorptionofacationicdyeontoaerobicgranules[e-mail]2011－04－16·28·2721．watergasheat．com