高氯废水COD测定方法的探究刘娟

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COD1,2(1.,222004;2.,300071)[]COD,COD。、,2000~15000mg/L、COD<200mg/L;2000~20000mg/L、COD>200mg/L。、、。>20000mg/L、COD<100mg/L。[];COD;;[]X703[]A[]1005-829X(2011)04-0066-04DiscussiononthedeterminationoftheCODofhighchloride-containingwastewaterLiuJuan1,WuHaoyu2(1.ChinaBluestarLehighEngineeringCorp,Lianyungang222004,China;2.CollegeofChemistry,NankaiUniversity,Tianjin300071,China)Abstract:TheimprovementmethodsforeliminatingtheinfluenceofchlorideionsonthedeterminationoftheCODofhighchloride-containingwastewaterarediscussed.ItisthoughtthatappropriatemethodsshouldbeusedforwatersampleshavingdifferentchlorideionconcentrationsandCOD’s.Theirsectionaldeterminationandchlorideoxygendemandcalibrationhavebeenanalyzed.Whenthechlorideionmassconcentrationis2000-15000mg/L,andCODislowerthan200mg/L,sectionaldeterminationcanbeused,whilechlorideionmassconcentrationis2000-20000mg/LandCODishigherthan200mg/L,chlorideoxygendemandcalibrationcanbeused.Bothofthesetwomethodscaneliminatetheinterferenceofchlorideionseffectively.Theresultsshowthattheyarecharacterizedbyhighaccu-racy,goodrepetition,easyoperationandlesspollution.Itisrecommendedthatforthewatersampleshavingchlorideionmassconcentrationhigherthan20000mg/LandCODlowerthan100mg/L,potassiumiodide-alkalinepotassiumpermanganatemethodshouldbeused.Keywords:highchlorine-containingwastewater;CODdetermination;sectionaldetermination;curvecalibrationCOD《》(GB11914—1989)〔1〕。,、、、,COD,,。COD。<2000mg/L,,>2000mg/L〔2-4〕。mg/L,〔5〕。,,COD。1GB11914—1989COD,Cl-100%,COD。COD31420114IndustrialWaterTreatmentVol.31No.4Apr.,201166:,;,,,1mg0.226mg。22.1Ag+Cl-AgCl,,,,COD。,,>10000mg/LCOD。,,COD。2.2,10。0.4g2000mg/LCOD。>2000mg/L,COD>250mg/L,2000mg/L,COD,。2000mg/L,COD250mg/L。2.3、,。,,COD,、。,。2000~10000mg/L。2.4COD。,2%;,pH2~3,。,。CODCOD。CODCOD。<20000mg/L,、,,,。2.5,732,。Ag+H+,Cl-Ag+,Cl-。。,COD。2.6,,60min,。,,,,,,CODOH·KI。COD。,。COD,CODOH·KICODCr,:CODCr=CODOH·KI/K。K,,COD,COD1、COD2,K=COD1/COD2K。,,0.20~62.5mg/L,mg/LCOD。2.72.7.1COD,。,2011-04,31(4),:COD67,。COD。2.7.2COD100mg/L,2000、4000、8000、15000mg/L4。20、10、5mL,0.4g,0.25、0.05、0.025mol/L,0.10、0.02、0.01mol/L,。1。1CODCl-2.7.30.4g,0.05、0.025mol/L<8.70%、<6.90%;0.25mol/L56.3%。COD;COD,COD。2000~15000mg/L,COD<200mg/LCOD,<0.25mol/L。,,。2.82.8.1COD,、、,、(CODCl),。,。COD,COD。2.8.2(1)。510000mg/L,10mL0.25mol/L、30mL,,。510、20、30、60、120min,,。2。210、20、30、60、120min2210、2232、2240、2225、2239mg/L,,。30min。(2)。2500、5000、7500、10000、12500、15000mg/L,2.8.2(1)30min,COD,,1。11,CODCl,:CODCl=0.224[Clˉ]+1.9。1mg0.226mg,99.1%。(3)COD。COD200mg/L、2000、4000、6000、8000、10000mg/L,2.8.2(1)30min,,0.3g1.5h,/(mg·L-1)/(mol·L-1)/mLCOD/(mg·L-1)/%CODCl-110020000.2520104.94.90210020000.0510102.62.60310020000.0255102.12.10410040000.2520116.116.10510040000.0510103.93.90610040000.0255103.03.00710080000.2520129.529.50810080000.0510105.65.60910080000.0255104.24.2010100150000.2520156.356.3011100150000.0510108.78.7012100150000.0255106.96.90/min10203060120CODCl/(mg·L-1)221022322240222522392011-04,31(4)68COD,COD。,CODCl,COD:COD=k(COD-CODCl),k。3。COD200mg/L、5000mg/L,4。3COD42.8.3,100%。,。CODCl,COD。,34COD4.3%,2.7%。,。,,。3(1)COD,。(2)、,,<9%。2000~15000mg/L、COD<200mg/L。(3),,<5%、<3%;,。2000~20000mg/L、COD>200mg/LCOD。(4)>20000mg/L、CODCOD。[][1].[M].4.:,2002:211-213.[2],.COD[J].,2003,15(5):37.[3].CODCr[J].,2005,17(1):26-27.[4].[J].,2004,33(11):680-682.[5]HJ/T132—2003[S].[](1983—),2005,:18951259933,E-mail:qianchenghejuan@126.com。[]2011-01-10()/(mg·L-1)COD/(mg·L-1)COD/(mg·L-1)/%2000651.5202.61.340001103.1201.40.760001557.2203.21.680002013.0207.83.9100002464.7208.64.3COD/(mg·L-1)COD/(mg·L-1)/%1326.9202.81.41330.1207.23.61327.8204.42.21321.3191.64.21328.0205.02.5,,90%。pH。(2)A100~120mg/L,B150mg/L,PAM0.5mg/L。(3),《》(GB4287—1992)。(4),,。[][1],,,.[J].,2000,26(10):33-37.[2],,.[J].,1993,15(6):2-5.[](1982—),2006,。:022-26689366,E-mail:lxz8275@126.com。[]2010-10-10(54)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!2011-04,31(4),:COD69

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