COD测试方法分析及若干问题探讨

COD(,519000)[](COD),3COD,;COD,COD[];;;AnalysisandDiscussionofSomeProblemsforMethodsofDeterminingCODHeDaotian(ZhuhaiStationofEnvironmentalMonitoring,Zhuhai519000,China)Abstract:Chemicaloxygendemand(COD)isoneofroutineanalysisindexsonwaterqualityandreflectswateror2ganicpollutioneffectively.Inthispaper,threekindsofmainmethodofdeterminingCODintsoducedandtheplusesandminusestothemhavebeencomparedwithanalysing.Atthesametime,fastmethodsandspectrophotometricmethodsde2terminingCODhavebeensummarized.Finally,someattentieproceedingsduringdeterminingCODareputforward.Keywords:chemicaloxygendemand;testing;fastmeasurement;pectrophotometry[]2005-02-24[](1973-),,,1993,:CODBOD5NH+4-NNO-2-NpHCOD(,ChemicalOx2ygenDemand),COD,,,,,COD,,COD1CODCOD,,COD,,COD:HACH-(),,[1];,,COD,,,[2]3COD(HACH),1[3]2CODCOD(),,,COD,,COD2.1[4]CODCr,2h0.5h,(0.9%1.4%),,CODCr,0520055[5]COD(15%20%),,,,COD,,5%,,,1/31/2,50%,,[6],CODCr,:CODCr,,,,,13COD[3]HACH,,,,,-,(2450MHz),,,CODHACH,,HACHCOD2h,HACH,COD/(mgL-1)30700103000015000,,,,,,,,,,,,COD,,,/%43.52/h312.5/(mgL-1)1000200030002.2[7]-COD,,,CODCOD,,:,COD,5%,,,,,,,,,(3.00mL),[8]COD,,,90%,90%,90%,,,[9]COD,,:,,,,,COD500mg/L[]COD,,:,1%,COD20900mg/L,500mg/L()[10]COD,COD,610nm(1/6K2Cr2O7)0.55mol/L,2002000mg/LCOD,CODCOD0.971.03[11]CODCr,,,,,50%,,,,[12](RO)COD,,,3CODCOD,,(1),COD,COD,1520055-(2),CODCOD(),COD400500mg/L,1.00mL;COD50400mg/L,5.00mL;COD50mg/L,,[5](3)COD,COD,,,,,,()[13]4COD,,COD,COD,[14,15]:-,,,,,[1],.(3)[M].:,19971354-356.[2],,,.[J].,2004,20(4):29-31.[3].COD[J].,2001,3:25-26.[4],.CODCr[J].,2001,87(6):35-36.[5],.COD[J].,1995,16(4):41-45.[6],,,.CODCr[J].,1995,14(2):60-63.[7],,,.-COD[J].,2004,6:21-23.[8],,,.[J].(),2001,28(4):428-433.[9],.COD[J].,1997,23(2):14-17.[10],,,.[J].,1996,18(6):24-27.[11],,,.CODCr[J].,2002,30(2):723-727.[12].COD[J].,1998,24(6):333-335.[13]ZerbeJ,SiepakJ.Comparisonofmethodsfordeterminationofchemi2caloxygendemandCODinwastewaters[J].ChemiaAnalityczna,1999,44(2):263-267.[14]KimYC,LeeKH,SasakiS,etal.Photocatalyticsensorforchemi2caloxygendemanddeterminationbasedonoxygenelectrode[J].A2nalChem,2000,72(14):3379-3382.[15]DanDZ,DouFL,XiuDJ,etal.Chemicaloxygendemanddeter2minationinenvironmentalwatersbymixed2aciddigestionandsinglesweeppolarography[J].AnalyticaChimicaActa,2000,420(1):39-44.(47)12PbZn3,Zn,Zn123,45,ZnCr,71.7%,2.6%,,Cr,4ZnPbCuCr,,CuZnPb,Cr,,,,,,,,,,[5]3CuPbZnCrCu,Pb,Zn,Cr4ZnPbCuCr,[1],.[J].,2001,20(6):103-108.[2]TessierA,CampbellPGC,BissonM.SequentialExtractionProce2duresfortheSpeciationofParticulateTracemetals[J].AnalyticalChemistry,1979,51:844-851.[3]Lopez2SanchezJF,RubioR,RauretG.ComparisionofTwoSequen2tialExtractionProcedureforTraceMetalpartitioninginSediments.Intern.J.Environ[J].Anal.Chem.,1993,51:113-121.[4]PaolaAdamo,S.Dudka,M.J.Wilson.DistrabutionoftraceelementsinsoilsfromtheSUDBURYsmeltingarea(Ontario,Canada)[J].Water,Air,andSoilPollution,2002,137:95-116.[5]DockeryDW,PopeCA.Acuterespiratoryeffectsofparticulateairpollution[J].AnnuRevPublicHealth,1994,15:107-132.2520055