改性粉煤灰吸附处理铜冶炼工业废水中Zn2的研究王鹤

2014－04－081986—。Zn2+王鹤365000Zn2+。2mol/L13．0495℃170r/min2h。pH0．007g/mL65min25℃Zn2+93．17%。Zn2+GB8978－1996。FreundlichlgQe=0．4511+5．3584lgCe△H=－1．7892J/mol△S=0．5254J/K·mol△G=－162．661J/mol。Zn2+82．99%。Zn2+X703．1A1008－021X201405－0042－05ＲesearchonAdsorptionTreatmentofZn2+inCopperSmelterIndustryWastewaterwithModifiedFlyAshWANGHeSanmingSteelGroupCo．Ltd．Sanming365000ChinaAbstractInthispaperthetechnologicalconditionsofflyashmodifiedbysulfuricacidandtheeffectionofittoremoveZn2+fromcoppersmelterindustrywastewaterwasstudied．Theresultsshowedthatundertheconditionsoftheconcentrationofsulfuricacidof2mol/Lthemassratioofflyashandsulfuricacidof1∶3．04thereactiontemperatureof95℃andareactiontimeof2hourstheremovalrateofZn2+withmodifiedflyashwasthebest．UndertheadditionofthepHoftherawwaterthedosageofmodifiedflyashof0．007g/mLthetimeof65minutesandtheadsorptiontemperatureof25℃theremovalrateofZn2+was93．17%andtheresidualconcentrationofZn2+conformedwiththefirstlevelofintegratedwastewaterdischargestandardGB8978－1996．TheadsorptionisothermswasdescribedbyFreundlichequationlgQe=0．4511+5．3584lgCe．Thethermodynamicparameterswas△H=－1．7892J/mol△S=0．5254J/K·moland△G=－162．661J/mol．UnderthesameconditiontheremovalrateofZn2+withrawflyashwas82．99%sotheadsorptioncapacityoftheflyashmodifiedbysulfuricacidwasenhanced．KeywordsflyashmodificationadsorptioncoppersmelterindustrywastewaterZn2+、、、、、1。。、2。H2SO4Zn2+。11．1200Zn2+12．115mg/LpH3．5。1．2AA－6200SHZ－DSKFO－01THZ－82JＲBAB204－ND/MAX－IIIAXAxiosX。1．31．3．1粉煤灰结构和化学组成测试方法1SEM1、2。·24·SHANDONGCHEMICALINDUSTＲY201443DOI:10.19319/j.cnki.issn.1008-021x.2014.05.01651122。。2XXＲD3、4。23XＲD3、4、。3X1。1SiO2Al2O3Fe2O3CaOK2OMgOTiO2Na2OI．L/%54．7228．654．143．391．680．781．220．363．41．3．2铜冶炼工业废水相关水质指标测试方法Zn2+pH。1．3．3改性粉煤灰的制备方法170r/min105℃2h。1．3．4含重金属工业废水的处理方法250mL100mL170r/min。。100mLZn2+Zn2+。·34·Zn2+4XＲD22．13－4、、。L9332。2A＞C＞B。A2B3C22mol/L95℃2h。2ABCZn2+/mg·L－1Zn2+/%115511．5087．64217521．1590．51319531．3389．06425521．1090．90527531．1190．81629510．9692．10735532．6977．82837514．7161．16939521．7885．33K1267．22256．36240．91K2273．81242．48266．75K3224．32266．50257．69珔k189．0785．4580．30珔k291．2780．8388．92珔k374．7788．8385．90Ｒ16．508．008．622．22mol/L95℃2h。2．2．1吸附时间对去除率的影响0．5g5250mL100mLpH25℃1530456090min、、Zn2+5。50．5g0．005g/mLZn2+60minZn2+。·44·SHANDONGCHEMICALINDUSTＲY201443552．2．2吸附温度对去除率的影响0．5g5250mL100mLpH60min2530354050℃、、Zn2+6。625℃Zn2+。。62．2．3改性粉煤灰用量对去除率的影响5250mLpH100mL0．20．51．01．72．6g25℃60min、、Zn2+7。7Zn2+。0．5g/mLZn2+GB8978－1996。72．2．4正交实验法探讨改性粉煤灰静态处理含重金属工业废水中Zn2+的最佳条件、、。L4233。33Zn2+65min25℃0．007g/mL。Zn2+0．828mg/LZn2+93．17%1．6124mg/g。3ABCZn2+/mg·L－1Zn2+/%155250．0031．11090．84255300．0070．90492．54365250．0070．82893．17465300．0031．25189．672．32．3．1粉煤灰改性机理分析122。。2．3．2改性粉煤灰处理含重金属工业废水机理分析［5］、。。1。2Si－O－Si、Al－O－Al－、。2．42．2．3Zn2+QeZn2+CelgQe－lgCe8FreundlichlgQe=5．3584lgCe+0．4511。Ce/Qe－Ce9Langmuir。·54·Zn2+8lgCeLgQe9CeQe2．562．2．21/TlnD10。10l/TlnDlnD=－△H/ＲT+△S/Ｒ10－△H/Ｒ=0．2152△S/Ｒ=0．0632Ｒ=8．314J/K·mol△H=－1．7892J/mol△S=0．5254J/K·mol。Gibbs△G=△H－T△ST=313K△G=－162．661J/mol。△H＜0Zn2+2．2．2Zn2+△G0Zn2+。2．60．4g250mL100mL170r/minZn2+。11。11Zn2+82．99%2．0110mg/gZn2+93．38%2．8287mg/g。。1131H2SO42mol/LH2SO41∶3．0495℃2h105℃2h。20．007g/mL25℃65minZn2+93．17%Zn2+0．828mg/LGB8978－1996。3Zn2+FreundlichlgQe=0．4511+5．3584lgCe。△H=－1．7892J/mol△S=0．5254J/K·mol△G=－162．661J/mol。42．0110mg/g2．8287mg/g。。1．M．2007208－209．2．J．2008273326－347．3．Cd2+、Pb2+、Cu2+J．200831357－59．4．J．200828412－15．5．J．200528518－20．6SaimaQ．MemonNajmaMemonS．W．Shahetal．Sawdust－AgreenandeconomicalsorbentfortheremovalofcadmiuⅡionsJ．Journalofhazardousmaterials2007B139116－121．．Zn2+J．201443542－46．·64·SHANDONGCHEMICALINDUSTＲY201443