粉煤灰对焦化废水总铬去除的影响何选明

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:,,1954,,,。*(No.50806053)。粉煤灰对焦化废水总铬去除的影响*何选明 周清梅 韩 军(, 430081)   1mg/L,-,。:(1)、、、pH。:150μm,4.00g/L,40min,pH3。,98.82%。(2),90.00%。(3),,、、,。      Removalofchromiumfromcokingwastewaterbyflyash HeXuanming,ZhouQingmei,HanJun.(HubeiKeyLabo-ratoryofCoalConversionandNewMaterials,WuhanUniversityofScienceandTechnology,WuhanHubei430081)Abstract: FlyashwasemployedforremovalofCrfromsimulatedcokingwastewater(1mg/L)todeterminetheeffectofgrainsize,flyashdosage,contactingtimeandpHonCrremovalefficiency.Chromiumcontentincokingwastewaterwasspectrophotometricdeterminedwithpotassiumpermanganateoxidizeddiphenylcarbazide.Baseonthesinglefactorexperimentsandorthogonalexperiment,theoptimumconditionswereobtainedasfollow:grainsizewas150μm,flyashwas4.00g/L,contactingtimewas40minandpHwas3.Withtheoptimumconditions,98.82%ofCrinsimulatedcokingwastewaterwasremoved.Theoptimumconditionsalsohadperfectperformanceforactualco-kingwastewatertreatment,andtheCrremovalratecouldreach90.00%.Keywords: flyash;cokingwastewater;chromium;removal  、、、,(Ⅲ)(Ⅵ),,(Ⅵ)。,。,17;,200771(Ⅵ);,、(Ⅵ)1.5、0.5mg/L。  、,,。,。,、[1],(、、)。,[2]、[3]、[4,5]。、、、。  ,,50%。,,,、、[6-8]。,,。1 1.1 原料和仪器  ,,,105℃12h,75、96、150、180、250μm,。10mL0.1g/L1000mL·13· DOI:10.15985/j.cnki.1001-3865.2009.07.022,,1mg/L。,pH2。  :PHILIPSXL30TMP(EDAXPHOENIX,PHILIPS)、722、AL204、DB-3D120-2F。1.2 实验方法  200mL,,,、,《》(GB7466-87)—。(1)。Y=c0-cc0×100%(1):Y,%;c0、c、,mg/L。2 2.1 粉煤灰的吸附机制  。13,SiO2、Al2O3、CaO、Fe2O3、FeO,。[9],3183~3980cm2/g。1 Fig.1 EDXspectraofflyash  ,、-3[10]。,3,(pH、),。2.2 单因素实验2.2.1   2.50g/L、40min、pH7、,,4。4,。。96μm,,。4 Fig.4 EffectofgrainsizeonCrremoval·14·  31 7 20097,,,,。96~150μm,,80.31%;150μm,,。,,。,150μm。2.2.2   150μm、40min、pH7、,0.25、0.50、1.00、1.50、2.00、2.50、3.00、3.50、4.00、4.50、5.00、5.50g/L,5。5,,;4.00g/L,,;4.00g/L,95.40%,。,4.00g/L。5 Fig.5 EffectofflyashdosageonCrremoval2.2.3   150μm、4.00g/L、pH7、,,6。6,10~40min,;40~70min,。,3,;,;,,,。,40min。2.2.4 pH  150μm、4.00g/L、40min、,pH6 Fig.6 EffectofcontactingtimeonCrremoval,7。7,pH1~3,98.40%,;pH3,,98.82%;pH3~7,pH,;pH7~11,pH,,pH,(Ⅵ)。,,pH3。7 pHFig.7 EffectofpHonCrremoval2.3 正交实验  ,,(A)、(B)、(C)、pH(D),。、、12。1 Table1 FactorsandlevelsoforthogonaltestA/μmB/(g·L-1)C/minD1752.0020321503.0040732504.006011  2,,:pH·15· 2 1)Table2 ResultsoftheorthogonalexperimentalABCD/%1111171.562122275.113133369.104212369.605223183.966231279.917313269.708321368.619332186.79K1215.77210.86220.08242.31K2233.47227.68231.50224.72K3225.10235.80222.76207.31k171.9270.2973.3680.77k277.8275.8977.1774.91k375.0378.6074.2569.10R5.908.313.8111.67  :1)K1~K3,%;k1~k3,%;R。。pH。,A3B3C2D1;,A2B3C2D1。,A2B3C2D1,150μm、4.00g/L、40min、pH3。2.4 实际焦化废水处理  ,,90.00%。,。3    (1)、、、pH。:150μm,4.00g/L,40min,pH3。,98.82%。  (2),90.00%。  (3),,、、,。:[1] ,.[J].,2007,20(2):36-38.[2] ,,.(Ⅵ)[J].,2007,36(1):22-25.[3] ZOUBOULISAL,KYDRSKA,MATLSKA.Removalofhexavalentchromiumanionsfromsolutionsbypyritefines[J].Wat.Res.,1995,29(7):1755-1757.[4] SHARMADC,FORSTERCF.Removalofhexavalentchro-miumusingsphagnummosspeat[J].Wat.Res.,1993,27(7):1201-1203.[5] ,,,.(Ⅵ)[J].,2002,22(9):19-21.[7] ,,,.[J].,2006,32(3):30-32.[8] ,,,.[J].,2003,4(12):36-39.[8] .[J].,2006,3(5):47-49.[9] ,.[J].,2008,23(23):13-14.[10] ,,.[J].,2006,20(2):54-56.编辑:黄 苇 (:2009-02-26)(上接第12页):[1] .[J].,1999,15(3):30-31.[2] .[J].,2001,27(8):39-41.[3] ,,,.[J].,2003,29(3):9-12.[4] ,,,.[J].,2005,31(11):10-14.[5] ,,,.[J].,2007,33(3):20-21.[6] ,,,./[J].,2008,24(12):16-21.[7] ,,,.()[M].4.:,2004:62-63.[8] ,.[J].,1991,23(4):404-410.[9] ,,,.[J].,1987,3(4):4-8.[10] ,,,.()———[J].,1986,47(3):1-19.[11] ,.()———[J].,1987,50(2):1-11.编辑:贺锋萍 (:2008-12-25)·16·  31 7 20097

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