粉煤灰对苯酚废水的吸附研究王峰

　　　201129粉煤灰对苯酚废水的吸附研究＊王　峰1　夏　汀1　林子增2　沈　巍1　王　郑2(1.,　210008;2.,　210037)　:在静态条件下研究了粉煤灰对苯酚的吸附性能,结果表明:平均粒径29.06μm,孔隙率64.0686%,在吸附时间50min,粉煤灰用量120g/L,pH=7.45条件下,对75mL浓度为30mg/L的苯酚模拟废水,吸附效果最好,可达82.4%。粉煤灰吸附苯酚机理复杂,偏向于单分子层吸附的Langmuir吸附等温线模式:q=0.042Ce/(1+0.095Ce),吸附反应为一级反应,速率方程为lnC=-0.0096t+3.3097(C0=30mg/L)。:粉煤灰;吸附;苯酚;机理;孔径分布STUDYONADSORPTIONOFWASTEWATERCONTAININGPHENOLWITHFLYASHWangFeng1　XiaTing1　LinZizeng2　ShenWei1　WangZheng2(1.NanjingMunicipalDesignandResearchInstituteCo.,Ltd,Nanjing210008,China;2.CollegeofCivilEngineering,NanjingForestryUniversity,Nanjing210037,China)Abstract:Mechanismandpropertiesofphenoladsorptiononflyashhavebeenstudiedinstaticcondition.Theresultsshowedthephenolremovalratecanreach82.4%intheconditionofadsorptiontime50min,120g/Ldosage,pH7.45usingflyashoftheaverageparticlesize29.06μmandporosity64.0686%for75mLtestedphenolwater.TheadsorptionofphenolwithflyashisconsistentwithanadsorptionisothermoftheLangmuirtypeequation,whoseq=0.042Ce/(1+0.095Ce);adsorptionrateequationbelongstofirst-orderreaction,whoserateformulaislnC=-0.0096t+3.3097(C0=30mg/L).Keywords:flyash;adsorption;phenol;Mechanism;porediameterdistribution＊2009。　　,,。、、、、,,,,,。、,、[1]。(1984)1.0μg/L,EPA,GB5749-2006《》0.002mg/L[2]。,、,,,,,。,,Zn2+[3],Cd2+[4],Pb2+[5],Cu2+[6],Ni2+[7],Cr3+[8],Cr6+[9],Hg2+[9],As5+[10];,[11],[12],[13];,[14],[15]。S3500AutoPoreⅣ9510,29.06μm,64.0686%,,,。1　1.1　实验原料,,;。1.2　实验方法:250mL,75mL30mg/L。,180r/min,,,,:82DOI:10.13205/j.hjgc.2011.s1.056　　　201129q=V(CO-Ce)W,η=CO-CeCO×100%:q,g/g;C0,mg/L;Ce,mg/L;V,L;η,%;W,g。1.3　分析方法:S3500,AutoPoreⅣ9510,QUANTA200INCA。:4-,510nm,,,。2　2.1　粉煤灰性质分析(SEM),1。-(SEM-EDS),1。1　1　%NaAlSiCKCaFe4.329.0415.142.513.8315.3010.0139.87　　,,。,,SiAl,Ca。2。2　2,3～209μm;:18.5μm,7.88%;29.06μm,Rosin-Ramonlar,Gauss。3。3　,,。3,64.0686%,29.06μm,58.8219%,91.81%,5.2467%,8.19%,。2.2　最佳吸附条件的确定C0=30mg/L,W、pHt。η:W,pH,t,η,。,50min,120g/L,pH7.45,82.4%。120g/L,50min,pH7.45。2.3　等温吸附方程确定5,10,20,40,60,80,100mg/L,Ce,q,Freundlichq=kCe1/nlnqlnCe,Langmuirq-1=(ab)-1Ce-1+b-1q-1Ce-1,4、5,。4　Freundlich4k=0.048、n-1=0.5658,83　　　201129。lnqlnCe,R2=0.993,Freundlich,q=0.048Ce0.5658。5b=0.517,a=0.079,q-1Ce-1,R2=0.994,Langmuir,q=0.042Ce/(1+0.095Ce)。Langmuir[16],Freundlich。,,Freundlich,Langmuir,Langmuir,[17],,。5　Langmuir2.4　粉煤灰吸附苯酚的动力学研究,,,-dC/dt=kCn。:ln(-dC/dt)=nlnC+lnkln(-dC/dt)lnC,。dC0/dt、C0,ln(-dC0/dt)-lnC06。6　ln(-dC0/dt)lnC0,R2=09878。,:-dC/dt=kClnC=-kt+lnC0,。lnC-t。k。30mg/L,,7。7,k=9.6×10-3,7　lnC=-0.0096t+3.3097。3　　1)29.06μm,64.0686%,50min,120g/L,pH7.45,75mL,30mg/L,,82.4%。2),Langmuir:q=0.042C/(1+0.095Ce),,lnC=-0.0096t+3.3097(C0=30mg/L)。[1]ClaytonGD,ClaytonFA.Patty'sindustrialhygieneandtoxicology[M].USA:Wiley-IntersciencePublication,1981.[2]GB5749-2006　[S].[3]BanerjeeSS,JayaramRV,JoshiMV.Removalofnickelandzincfromwastewaterusingflyashandimpregnatedflyash[J].Sepa-rationScienceandTechnology,2003,38(5):1015-1032.[4]ApakR,TutemE,HugulM,etal.Heavymetalcationretentionbyunconventionalsorbents(redmudsandflyashes)[J].WaterRe-search,1998,32(2):430-440.[5]RicouP,LecuyerI,LeCloirecP.RemovalofCu2+,Zn2+andPb2+byadsorptionontoflyashandflyash/limemixing[J].WaterScienceandTechnology,1999,39(10-11):239-247.[6]PandayKK,PrasadG,SinghVN.Copperremovalfromaqueoussolutionsbyflyash[J].WaterResearch,1985,19(7):869-873.[7]RaoM,ParwateAV,BholeAG.RemovalofCr6+andNi2+froma-queoussolutionusingbagasseandflyash[J].WasteManagement,2002,22(7):821-830.[8]KelleherBP,O'CallaghanMN,LeahyMJ,etal.Theuseofflyashfromthecombustionofpoultrylitterfortheadsorptionofchromium(III)fromaqueoussolution[J].JournalofChemicalTechnology&Biotechnology,2002,77(11):1212-1218.[9]BanerjeeSS,JoshiMV,JayaramRV.RemovalofCrandHgfromaqueoussolutionsusingflyashandimpregnatedflyash[J].SeparationScienceandTechnology,2004,39(7):1611-1629.[10]DiamadopoulosE,LoannidisS,SakellaropoulosGP.Asremovalfromaqueoussolutionsbyflyash[J].WaterResearch,1993,27(12):1773-1777.[11]KuziemskaI.Applicationofwaterextractofbrowncoalflyashtophosphateprecipitationfrompollutedwaters[J].WaterResearch,1980,14(9):1289-1293.(110)84　　　2011291):,pH7.5,COD,;2)COD、pH、,;3),COD,(,),,。4　4.1　厌氧产沼气利用UASBEGSB,1kgCOD0.42～0.5m3。:1),(H2OCO2),;2),,。,,,、。4.2　中水回用,COD、pH、SS。,。,,,、、、、。,。4.3　污泥脱水及锅炉除尘冲灰排水流程改进,20～30m3/h,,COD,,,CASS,CASS,、。,,。,,,CASS,。5　1)“-”。2)“-”:,COD,COD,。3)、、,,。　　541002　29()　[phone]E-mail　[e-mail]2011-06-24(84)[12]ReardonEJ,WangYX.Alimestonereactorforfluorideremovalfromwastewaters[J].EnvironmentScienceTechnology,2000,34(15):3247-3253.[13]HollisJF,KerenR,GalM.BoronreleaseandsorptionbyflyashasaffectedbypHandparticlesize[J].JournalofEnvironmentalQuality,1988,17:181-184.[14]KhannaSK,MalhotraP.Kineticsandmechanismofphenolad-sorptiononflyash[J].IndinaJournalofEnvironmentHealth,1977,19:224-237[15]GuptaVK,AliI.RemovalofDDDandDDEfromwastewateru-singbagasseflyash,asugarindustrywaste[J].WaterResearch,2001,35(1):33-40.[16],.[M].:,2000.[17]./[J].,2001,21(1):29-33.　　210037　159E-mail　[e-mail]2011-04-11110