不同碱化度的聚合氯化铝在焦化废水中的混凝效果及残留铝量研究张卫飞

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,(,310002)[](B)(PAC),、。:、pH、PAC;1.5,,;COD,,。[];;;;[]X703[]B[]1005-829X(2011)06-0058-04StudyonthecoagulationeffectivenessofpolyaluminumincokewastewaterhavingdifferentbasicitiesandresidualaluminumcontentsZhangWeifei,ChenChangjun(ZhejiangDesignInstituteofWaterConservancy&Hydro-ElectricPower,Hangzhou310002,China)Abstract:Polyaluminum(PAC)coagulanthavingdifferentbasicities(B)hasbeensynthesizedbymicroalkalinedroppingmethod.Thecoagulationcapacity,residualaluminumcontentandinfluentialfactorsarestudied.Theresultsshowthatthedosage,pHandbasicityhaveeffectsonthecoagulationcapacity.Whenthebasicityis1.5,thecoagulationcapacityisthebest,theresidualaluminumcontentisthelowest.WiththedecreaseofCOD,theresidualaluminumcontentdecreases,aswell.ItmeansthattheresidualaluminumdecreaseisconsistentwiththedecreaseofCOD.Keywords:polyaluminum;coagulant;basicity;residualaluminum;cokewastewater(PAC),pH。PAC,,、pH。,,,,〔1-2〕,,pH。11.1:JB90-D,,DJB-623,pHS-9V,721-,UV-2401PC,AlCl3·6H2O(AR),HCl(AR),NaOH(AR)。1.2PACPAC,AlCl3·6H2O0.05mol/LHCl,0.5mol/LAlCl3,,NaOH(B0.5、1.0、1.5、2.0、2.5),20mL/h,48h。PAC1。1Al-FerronBAla/%Alb/%Alc/%0.584.2416.3901.069.7020.49.91.551.6021.9626.442.026.1931.4742.242.57.446.2946.31IndustrialWaterTreatmentVol.31No.6Jun.,201131620116IndustrialWaterTreatmentVol.31No.6Jun.,2011581.3A/O,。,:CODCr245mg/L,74,pH7.82。1.4。1000mL,(160r/min),1min,(40r/min)10min,30min1cm,CODCr、。pHNaOHHCl。1.5〔3〕,CODK2Cr2O7,,S。Al-Ferron〔4〕。22.1PAC(B=0.5、1.0、1.5、2.0、2.5)PAC(Al)COD1、2。1PACCOD1,,PACCOD,,COD,,。B=0.5、1.0、1.5、2.5PAC:(1),,,COD,50%;2PAC(2),,2.0mmol/LCOD;(3),,COD。B=2.0PAC,CODPAC。PAC,1.5mmol/L,COD,2.0mmol/L,,,,PACCOD。2,,COD。B=0.5、1.0、1.5、2.5PAC,1.5~2.0mmol/L,。B=2.0PAC,。PACCODPAC。,。B<1.5PACAl,Al,,ζ,。,,。B=2.5PAC,Alb,Al13、Al24(OH)60(H2O)2412+〔5〕,,,。B=2.0PAC,Alb,PAC,。,PACAlc2011-06,31(6),:59,,,,,。2.2pH1.5mmol/L,pH,PAC,3、4。3PACpHCOD4PACpH3,pH6,pH,COD,pH6~8,。pH,,B=0.5、1.0、1.5PACCOD,B=2.0、2.5PAC,COD。4,pHCOD,,pH,,pH6~8,。。pHPACAl,pH,Al,pH,Ala,Alb〔4〕,,COD。,PACAl(OH)3(am)-,。PAC,Alb,Alb,,。,PACpH。2.3pH5PAC1.5mmol/L,PACpH。5pHPAC5,pH。pH6,PACpH;pH,PACAl(OH)3,,,〔6〕。pH,,,pH。35,,pHCODpH。,,Al,Al。,pH,,,。2.4B6PAC1.5mmol/L,PACCOD。6,,B=0.5、1.0,,PACCOD。B=1.5,,2011-06,31(6)60!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!6COD,B=2.0,,B=2.5,。BCOD,B,B=1.5,,,。,B,PAC,,,B,,,,,,B=1.5,。B2.0,B=1.5PAC,。B=2.5,Al,,,。。3(1)PAC,、pH,1.5~2.5mmol/L,pH6~8。1.5PAC。(2),。,1.5,。(3)COD,COD,,。[][1].[J].,1992,12(2):91-92.[2]HarrisWR,SheldonJ.Equilibriumconstantforbindingofalu-minumtohumanserumtransferring[J].InorganicChemistry,1990,29(1):119-124.[3].[M].3.:,1989:30-50.[4],,.():Al-Ferron[J].,1999,20(5):1-5.[5].[J].:,1999.[6]MillerRG,KopllerFC.Theoccurrenceofaluminumindrinkingwater[J].J.AWWA,1981,84:84-91.[](1978—),2003,,。:0571-86827218,13588029039,E-mail:zhangwf29039@163.com。[]2011-03-23(),()。,,0.23t,100。,,,,。,,、、、、、,,,。(《》,2011-06-07,6)··2011-06,31(6),:61

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