Fenton试剂法处理焦化废水的研究王洪萍

、、、、、。。。FentonH2O2+Fe2+H2O2Fe2+·OH。Fenton。Fenton。1.1.1HH-5CODPHS-29AHH-4。30%H2O2、FeSO4·7H2O、。pH7.2COD1935mg/L、、。1.2100mL250mLPHS-29AH2SO4NaOHpHFeSO4H2O2pH10COD。2.2.1H2O2FentonFentonpH=3[Fe2+][H2O2]1:1030℃。H2O2COD1。1H2O2COD1CODH2O2COD。H2O240mmol/LCOD72.1%H2O2100mmol/LCOD84%11.9%H2O2158mmol/LCOD89.9%H2O2COD。H2O2H2O2Fenton。H2O2H2O2·OHCODH2O2H2O2H2O2·OHH2O2+·OH→HO2·+H2OH2O2Fe2+Fe3+Fe3+·OH。2.2[Fe2+]/[H2O2]()FentonH2O2158mmol/LpH=330℃[Fe2+]/[H2O2]COD1。1[Fe2+]/[H2O2]COD1[Fe2+]/[H2O2]COD[Fe2+]/[H2O2][Fe2+]/[H2O2]COD。FentonFe2+·OHFe2+H2O2·OH·OH2·OH→H2O2H2O2。FentonFe2++H2O2→Fe3++·OH+OH-Fe2++·OH→Fe3++OH-Fe2+·OH·OH。Fenton[Fe2+]/[H2O2]。1[Fe2+]/[H2O2]1:10～1:5[Fe2+]/[H2O2]=1:10。2.3pHFentonH2O2158mmol/L[Fe2+]/[H2O2]=1:1030℃pHCOD2。2pHCOD2pH3～4CODpH=3CODpHCOD。FentonpHFe2+pHFentonFentonH2O2、[Fe2+]/[H2O2]、pH、CODH2O2158mmol/L[Fe2+]/[H2O2]=1:10pH=330min。COD89.9%。H2O2。H2O2。FentonCOD[Fe2+]/[H2O2]COD(mg/L)COD(mg/L)COD(%)1:20193524587.31:15193523188.11:10193519589.91:51935173.7911:31935235.887.891——200893《》。2。2(mg/L)2CODcr＜15mg/LBOD5＜3mg/L《》CJ25.1-89、、、。2.6、。1①。②。2①②。3、、:①②③。。。。1.J.200218(5)83-86.2.J.199723(12)61-63.3.———J.199925(12)41-45.4.J.·200313(2)120-121.5.M.:,20026.J.2004,21(1):41-43．7.J.,1991,17(5):318-323.8.D.:,2002.9,,..2004(3):33-35.CODcrBOD5SS(/l)16.82.817.20.3108.41.47.60.21012.52.210.30.2510501010/100·OHFe2+Fe3+pHH2O2。2.4FentonH2O2158mmol/L[Fe2+]/[H2O2]=1:10pH=3COD3。3COD3Fenton5minCOD81.7%COD30minCOD8.2%89.9%。Fenton。Fenton5min30minCOD30min。H2O2158mmol/L[Fe2+]/[H2O2]=1:10pH=330minCOD195mg/LCOD89.9%。FentonH2O2。。2.5H2O2FentonH2O2CODH2O2COD。H2O2·OHH2O2。H2O2H2O2H2O2COD2。2H2O2COD[Fe2+]/[H2O2]=1:10pH=330℃2CODH2O2CODCOD。。3.3.1FentonH2O2158mmol/L[Fe2+]/[H2O2]=1:10pH=330minCOD195mg/LCOD89.9%。3.2H2O2H2O2Fenton。1BossmannSH,OliverosE,GobSetal.Newevidenceagainsthy-droxylradicalsasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonReaction.Phys.Chem.A,1998,102(28):5542-55502,.Fenton.,1994,13(3):26-343,.Fenton.,2001,84(3):24-254,.Fenton.,2002,28(2):46-49H2O2(mmol/L)COD(mg/L)COD(%)105273.2256247.185.986.887.2133231.4209197.28889.289.8158195170.1154.689.991.2929092——