CaCl2+磷酸盐法处理含氟废水的探讨

1997-12-01Vol.24No12199886CaCl2+DiscussiononTreatingofFluoricWastewaterbyCacl2andPhosphate(122000)().,pH,,,5mgöL.ABSTRACTByaddingCaandphosphateintofluoricwastewater,fluorinecanbetakenout.Theresultsshowthatbycontrol2lingrightph,amountofCaandphosrhatereactiontimeandclarifingtime,theconcentrationoffluorineinwastewatercanbere2duceddownto5mgölafterreaction.KEYWORDSFluoricwastewaterAnalysis1,,.,10mgöL(GB8978-1996).,,,,.,,,.,.22.1,38mgöL.2.2,(CaCl2),pH,,,pH,.50mL.1.12CaCl45hpH0.5hpH0.5h2133.1CaCl21CaCl2(min)015304560(Eömv)280282286286285(mgöL)5.14.84.14.34.6(NaOHpH)=2021CaCl2NaOHpH11.23,NaOHpH7.13,30min,4h1,,,,30min.3.2CaCl2pH22.2CaCl2pHpH7.189.4510.8612.07(Eömv)292296313302(mgöL)3.22.71.12.1(NaOHpH)=2021CaCl230min,NaOHpH,NaOHpH7.10,30min,4h2pH22,pH,,pH10.81.3.3pH33.3pHpH5.506.317.308.289.0510.06(Eömv)249310287269268266(mgöL)16.91.33.97.78.08.7(NaOHpH)=2021CaCl230min,NaOHpH11.23,NaOHpH,30min,4.5h3pH33,NaOHpH,pH6.317.30,pH6.0,Ca5(PO4)3F,,pH7.5,Ca5(PO4)3OHCa5(PO4)3F,Ca5(PO4)3OH1.610-58,Ca5(PO4)3OH.3.4,,,.,.45.314(Eömv)288296298297298(mgöL)3.72.72.52.62.5()3021202115211021921(NaOHpH)CaCl2,NaOHpH11.23,30min,NaOHpH7.3,30min,4.5h5(Eömv)288288287281(mgöL)3.73.73.95.0()201.51151.51101.5151.51(NaOHpH)CaCl2,NaOHpH11.23,30min,NaOHpH7.03,30min,4.5h45,=1.5121,.,,CaF2.,=15212021.4(1),5mgöL,10mgöL.(2),,pH1011.5.(3)pH.,pH6.07.5.(4).,:=15212021.(5),Ca(OH)2,.1.JW..,1980.145.161.2...,1990,(6).418.421.3...,1992,(3).50.51.4...,234.245.5...,1991,(1).32.36.6...1995.(6)36.7...GB748487.1987.594.597.41