Fenton氧化体系OHOR省略H2O2和Fe2变化特征汪昆平

FentonFe2+H2O2·OH[1-4]。[5]Fenton。Fenton·OH、ORP、H2O2、Fe2+、Fenton。ORP-Fenton·OHORPORPFentonORP、。11.130%H2O2ARARARARARARAR。LHP-05-HPHS-25ORP-42175278-1。。1.2100mL50mLpHH2O2。·OH、ORP、H2O2、Fe2+。1.3·OH[6]ORPH2O2Fenton·OH、ORP、H2O2Fe2+400045Fenton·OH、ORP、H2O2Fe2+Fenton。Fenton·OH、ΔORPY=a·b·X/(1+b·X)H2O2、Fe2+dC/dt=-k(C-l)。Fenton·OH、ΔORPn(H2O2)/n(Fe2+)11。n(H2O2)/n(Fe2+)2·OH、Fe2+。H2O2/Fe2+·OH·OH8%ΔORPΔORP83%。FentonFe2+91.7%～98.7%、H2O238.9%～68.4%H2O2/Fe2+、pHFe2+H2O2H2O2ΔORP。Fenton·OHORPH2O2Fe2+X703.1A1000-3770(2011)12-0036-0062011-04-0620[e-mail]3712201112TECHNOLOGYOFWATERTREATMENTVol.37No.12Dec.,201136DOI:10.16796/j.cnki.1000-3770.2011.12.009[7]Fe2+[8]。22.1Fenton·OH·OH·OH－C＝C－·OH[6]Amethyst+·OH=AchromaticpH=3.0H2O250mmol·L-1、2mmol·L-1H2O2/Fe2+Fenton·OH1。n(H2O2)/n(Fe2+)·OH·OH。1Y=a·b·X1+b·X。Y·OHX。a·OHb·OHlimx→∞Y=limx→∞a·b·X1+b·X=a12a=a·b·X1/21+b·X1/2→b=1X1/2H2O2/Fe2+·OH1。1R20.99n(H2O2)/n(Fe2+)b·OHH2O2/Fe2+a·OH·OH8%。Fe2+·OHn(H2O2)/n(Fe2+)12b=38.03215min-1n(H2O2)/n(Fe2+)21b=9.92795min-1Fe2+·OHn(H2O2)/n(Fe2+)12a=0.03811mmol·L-1n(H2O2)/n(Fe2+)21a=0.03890mmol·L-1。·OHFenton·OHn(H2O2)/n(Fe2+)。H2O2·OH、·OH。a·OHn(H2O2)/n(Fe2+)21b·OHn(H2O2)/n(Fe2+)11～21。2.2ORPORP-1·OH－Fig.1Therelationshipof·OHconcentrationwithtimeatvariousH2O2/Fe2+molarratio051015200.0000.0050.0100.0150.0200.0250.0300.0350.0400.045c(OH)/mmolL
/min1H2O2/Fe2+·OHTab.1Theparameterstobestfitthefunctionto·OHconcentrationwithtimeatvariousH2O2/Fe2+molarration(H2O2)/n(Fe2+)a/mmol·L-1b/min-1R212112131415161Y=0.03811·38.03215X1+38.03215XY=0.03886·18.76002X1+18.76002XY=0.03890·9.92795X1+9.92795XY=0.03869·6.02278X1+6.02278XY=0.03820·4.09452X1+4.09452XY=0.03740·3.05627X1+3.05627XY=0.03618·2.38149X1+2.38149X0.038110.038860.038900.038690.038200.037400.0361838.0321518.760029.927956.022784.094523.056272.381490.999990.999991.000000.999910.998620.997850.99487Fenton·OH、ORP、H2O2Fe2+37。-。ORP-。ORP。2FentonORPFentonORPpH=3.0、H2O25mmol·L-1、Fe2+n(H2O2)/n(Fe2+)。Y=a′·b′·X′1+b′·X′2。Fenton·OHn(H2O2)/n(Fe2+)ΔORPn(H2O2)/n(Fe2+)FentonΔORPn(H2O2)/n(Fe2+)ΔORP。Fenton·OHn(H2O2)/n(Fe2+)a'、b'ΔORPΔORP、ΔORPΔORP。Fenton·OH。H2O2ΔORPΔORPFe2+ΔORPΔORP。n(H2O2)/n(Fe2+)1112ΔORPΔORP。a'ΔORPFentonn(H2O2)/n(Fe2+)11。·OHΔORPΔORP。n(H2O2)/n(Fe2+)11。2.3Fe2+·OH、ΔORPpH=3.0、H2O250mmol·L-1、2mmol·L-1Fe2+20min·OH、ΔORP3。·OH、ΔORP。n(H2O2)/n(Fe2+)·OH·OH·OH8%、ΔORP3·OH、ΔORPFe2+Fig.3·OHconcentrationandΔORPwiththeadditionoftheFe2+0.03650.03700.03750.03800.03850.0390
(Fe)/mgLORP/mVc(OH)/mmolL112562818.67041411.29.34081001201401601802002H2O2/Fe2+FentonΔORPFig.2ΔORPwithtimevariationatvariousH2O2/Fe2+molarratio05101520050100150200
/min
ORP/mV2H2O2/Fe2+ΔORP-Tab.2TheparameterstobestfitthefunctiontoΔORPwithtimeatvariousH2O2/Fe2+molarration(H2O2)/n(Fe2+)a′/mVb′/min-1R212112131415161Y′=192.57864·3.05662X′1+3.05662X′Y′=195.58299·3.78589X′1+3.78589X′Y′=175.48735·7.89682X′1+7.89682X′Y′=151.57212·10.65803X′1+10.65803X′Y′=139.25754·4.09452X′1+4.09452X′Y′=130.31435·4.93656X′1+4.93656X′Y′=106.66769·4.4014X′1+4.4014X′192.57864195.58299175.48735151.57212139.25754130.31435106.667693.056623.785897.896829.3828910.658034.936564.40140.999120.999430.999210.999960.999850.999680.99482371238ΔORPΔORP83%。Fenton·OHFe2+H2O2。Fe2+56mg·L-1·OH、ΔORPn(H2O2)/n(Fe2+)11。Fe2+56mg·L-1·OH、ΔORPFe2+Fe2+56mg·L-1·OH、ΔORPFe2+ΔORP·OHFe2+·OH、ΔORPΔORP·OH。FentonFe2+H2O2·OH。Fe2+H2O2·OH·OH、ΔORPH2O2·OHH2O2·OH、ΔORPFentonn(H2O2)/n(Fe2+)·OH、ΔORP。ORP·OHH2O2/Fe2+·OHΔORP。2.4H2O2Fe2+4FentonH2O2pH=3.0、H2O250mmol·L-1、H2O2/Fe2+12～61。FentonH2O2n(H2O2)/n(Fe2+)H2O2n(H2O2)/n(Fe2+)H2O2H2O2H2O250mmol·L-112～61n(H2O2)/n(Fe2+)H2O268.4%～38.9%。2、3·OHΔORPH2O2。H2O21R2=0.96042～0.99991C=l+m·exp(-k·t)1CH2O2tlH2O2mH2O2l1dCdt=-k(C-1)2FentonH2O21H2O2H2O2lFentonlk1.2～5.5kFe2+R2=0.99407k=0.08427·exp(0.03494CFe2+)+1.277075FentonFe2+pH=3.0、H2O250mmol·L-1、n(H2O2)/n(Fe2+)12～61。4FentonFe2+n(H2O2)/n(Fe2+)Fe2+。4n(H2O2)/n(Fe2+)Fe2+Fe2+。n(H2O2)/n(Fe2+)Fentonn(H2O2)/n(Fe2+)=12Fe2+5H2O2/Fe2+FentonFe2+Fig.5Fe2+concentrationwithtimevariationatvariousH2O2/Fe2+molarratio05101520020406080100120
(Fe)/mgL
/min4H2O2/Fe2+FentonH2O2Fig.4H2O2concentrationwithtimevariationatvariousH2O2/Fe2+molarratio051015205101520253035
/minc(HO)/mgLFenton·OH、ORP、H2O2Fe2+3991.7%n(H2O2)/n(Fe2+)FentonFe2+96.2%～98.6%。Fe2+H2O2/Fe2+。12～61n(H2O2)/n(Fe2+)Fe2+1.84～0.16mmol·L-11、2·OH、ΔORPFe2+。Fe2+1R2=0.99797～0.99967CFe2+tlFe2+mFe2+l1FentonFe2+1Fe2+Fe2+lH2O2/Fe2+Fentonl。Fe2+Fentonk2.58～3.14min-1n(H2O2)/n(Fe2+)=21Fentonk3.14min-1Fe2+H2O2/Fe2+、Fe2+。2.1Fe2+Fenton·OHFenton。4、5H2O2/Fe2+FentonH2O2、Fe2+1、2·OH、ORPH2O2、Fe2+。620minFe2+H2O2n(H2O2)/n(Fe2+)。n(H2O2)/n(Fe2+)FentonFe2+H2O2n(H2O2)/n(Fe2+)Fe2+H2O2。n(H2O2)/n(Fe2+)=61Fe2+H2O2n(H2O2)/n(Fe2+)=11H2O23.5。·OH、ΔORPFentonn(H2O2)/n(Fe2+)=11～12H2O2/Fe2+Fenton·OH、ORPFe2+H2O2。2.5pHFentonH2O250mmol·L-1、n(H2O2)/n(Fe2+)11pH·OH、ΔORP·OH、ΔORP5min。720minFent