NaClO处理石化废水的实验研究

2014141267·5·—Fe2+/NaClO(510006)[]-Fe2+/NaClONaClOFe2+pHFe2+/NaClOCODFe2+/NaClOCODNaClO8mL/LFe2+224mg/LpH630minCOD85.2%95.6%(GB8978-1996)[][]X[]A[]1007-1865(2014)01-0005-02StudyonChemicalCoagulationandFe2+/NaClOTreatingPetrochemicalWastewaterYinZiyang,YanYouping,YaoXing,WangYongjun,LiangRuirong(Environmentalscienceandengineeringcollege,GuangdongUniversityofTechnology,Guangzhou510006,China)Abstract:TreatingofpetrochemicalwastewaterbychemicalcoagulationandFe2+/NaClOoxidationprocesswascarriedout.TheeffectsofdosageofNaClO,dosageofFe2+,initialpHandreactiontimeontheCODandNH4+-Nremovalwerestudied.TheexperimentalresultsshowedthattheFe2+/NaClOoxidationprocesswasapositiveroleontheremovaloftheCODandNH4+-N.WhenthedosageofNaClOandFe2+was8mL/Land224mg/LinitialpHwas6,reactiontimewas30minutes,theremovalrateoftheCODandNH4+-Nreached85.2%and95.6%.AndthewaterqualityofeffluentreachedtheI-gradedemandoftheintegratedwastewaterdischargestandardofChina(GB/8978-1996).Keywords:chemicalcoagulationFe2+NaClOpetrochemicalwastewater[1]MBR[2][3][4]Fe2+/NaClOpH2FeSO4·7H2O3g/LNaClO8mL/L30min99%Fe2+/NaClOFe2+/NaClONaClOFe2+pH11.111Tab1.ThebasiccharacteristicsofpetrochemicaleffluentpHSS/(mg·L-1)COD/(mg·L-1)/(mg·L-1)8.0~8.3180~200220~26028~35(10%)FeSO4·7H2OXJ-IIICODPHS-3CZR4-6CODK2Cr2O7pHPHS-25SS1.21.2.1100mL40mg/LPAC10mg/LCTSZR4-6300r/min1min60r/min10min30minCOD1.2.2Fe2+/NaClO100mLpHNaClOFe2+pH8.520min0.45μmCODNaClOFe2+pHCOD22.1COD48.4%13.6%COD2.2Fe2+/NaClO2.2.1NaClOpH6.0Fe2+224mg·L-1NaClO30minCOD10246810125101520253035404550556065707580859095/%NaClO/(mL.L-1)COD1NaClOCODFig.1TheeffectofNaClOonremovalrateofCODandNH4+-N1NaClO2mL/LCOD60.5%18.8%NaClO2mL/L~8mL/LCODNaClO8mL/LCOD83.5%91.2%NaClONaClOCODNaClONaClONaClO8mL/L[]2013-12-09[](1987-)20141·6·(mL.L-1)COD2Fe2+CODFig.2TheeffectofFe2+onremovalrateofCODandNH4+-N2Fe2+224mg/LCODFe2+224mg/LCOD84.0%94.3%Fe2+CODFe2+Fe2++HClO→Fe3++HO·+Cl-HO·CODFe2+224mg/LFe2+HO·HO·HO·CODFe2+Fe2+224mg/LFe2+[5-6]Fe2+224mg/L2.2.3pHpH8mL/LNaClO224mg/LFe2+30minCOD345678950556065707580859095100/%pHCOD3pHCODFig.3TheeffectofinitialpHonremovalrateofCODandNH4+-N3pHCODpH6COD84.7%95.6%pH6CODpHFe2+Fe2+Fe2++HClO→Fe3++HO·+Cl-Fe2+HClOOH·COD2NH3+3HClO→N2+3H3O++3Cl-pHHClOpHNaClOHClO[7]pH62.2.4pH68mL/LNaClO224mg/LFe2+COD401020304050605101520253035404550556065707580859095100/%/minCOD4CODFig.4TheeffectofreactiontimeonremovalrateofCODandNH4+-N410minCOD10~30minCOD30min85.2%95.6%Fe2+NaClOCODFe2+NaClO30min30min3(1)COD(2)Fe2+/NaClONaClO8mL/LFe2+224mg/LpH630minCOD85.2%95.6%(3)-Fe2+/NaClO[1][J]200912(12)129-134[2]MBR[J]201131(12)81-84[3][J]200323(7)76-78[4]Fe2+/NaClO[J]200732(3)14-16[5]Fe2+/HClOβ-[J]200525(2)20-22[6]Fenton[J]200922(5)517-520[7][J]200940(3)23-26