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当前位置:首页 > 商业/管理/HR > 人事档案/员工关系 > 高浓度氯离子废水COD测定方法研究进展刘鹏
INDUSTRIALWATER&WASTEWATERVol.49No.4Aug.,20181,2,1,2,1,2,2,2(1.,125001;2.,222004)CODHJ828—2017《》。,[1-2]。Cl-COD,COD[3],Cl-COD。、,Cl-COD,CODCOD,。Cl-COD,Cl-COD。1Cl-COD,HJ878—2017()HJ/T70—2001《》()COD[4]。ResearchprogressofCODdeterminationmethodforhighconcentrationchlorideions-containingwastewaterLIUPeng1,WANGQiang2,ZHANGYan1,LIJing-jing2,WANGYue-rong1,XUJun2,WANGKai-chun2,LINHao-yu2(1.HangjinTechnologyCo.,Ltd.,Huludao125001,China;2.ChinaBluestarLehighEngineeringCorp.,Lianyungang222004,China)Abstract:UsingpotassiumdichromatemethodtodetermineCODinhighconcentrationchlorideions-containingwastewater,deviationmayappears;andthehigherthechlorideionsconcentrationis,thegreatertheerrorofthemeasurementresultswillbe.InthecaseofrelativelystrictCODemissionstandardsexecuted,misjudgmentduetotheCODerrormeasurementwhenevaluatingwhetherthehighconcentrationchlorideions-containingwastewaterqualitymeetthedischargestandardornothasbecomeafocusofenvironmentmonitoringandsupervision.Theerrorsourcesofhighconcentrationchlorideions-containingwastewaterdeterminationaswellasthefactorsinfluencingCODdeterminationwereanalyzedfromaspectsofprincipleandoperatingsteps.Ontheabovebasis,theimprovementofCODdeterminationmethodforhighconcentrationchlorideions-containingwastewaterwasproposed.Keywords:highconcentrationchlorideions-containingwastewater;CODdetermination;influencingfactorsCOD:COD,,。COD,COD。COD,COD。:;COD;:X832.02:A:1009-2455(2018)04-0008-05·8·(2),1mgCl-2.088mgHgSO4。Cl-,HgSO4[6-8]。HgSO4,HgSO4Cl-,m(HgSO4)∶m(Cl-)20∶1。(2)HgSO4Cl-100%。Cl-、COD,HgSO4Cl-99%,ρ(Cl-)>10000mg/L,ρ(COD)≤50mg/L,HgSO4,Cl-COD。2Cl-COD2.1Cl-Cl-,COD。,,,Cl-COD。,COD,Cl-。[9]0.25mol/LCl-COD,m(HgSO4)∶m(Cl-)=10∶1HgSO4Cl-。,COD,Cl-,COD。COD100mg/L,Cl-1000mg/L,20%。,Cl-,,COD。2.2HgSO4Cl-Cl-HgSO4、。(2),Cl-,Cl-,。[10],Cl-,10HgSO4Cl-,Cl-,103%123.8%。HJ878—2017GB11914—1989《》,HgSO4m(HgSO4)∶m(Cl-)10∶120∶1;HgSO4,HgSO4Cl-。HgSO4,,。2.3,Cl-,Cl-,Cl-HgSO4,Cl-,,,,HgSO4Cl-,Cl-[11-14]。[15]Cl-,,Cl-。,Cl-,COD16~50mg/L,Cl-1000mg/L,(0.05mol/L0.025mol/L),[16]。Cl-,Cl-,[17-20]。1Cl-CODTab.1ApparentCODofCl-withdifferentconcentrationsoxidizedbypotassiumdichromateρ(Cl-)/(mg·L-1)100020004000100002000050000ρ(CODCr)/(mg·L-1)2264529042260452011300ρ(CODCr)/(mg·L-1)225.0448.9898.72239.14480.811232.2/%99.699.199.499.099.199.4Cl-,Cl-COD。Cl-:Cr2O72-+6Cl-+14H+→2Cr3++3Cl2↑+7H2O(1)1mg/LCl-0.226mg/LCOD。Cl-COD1[5]。Cl-10000、20000、50000mg/L,0.5%Cl-COD11.3、22.6113mg/L;ρ(COD)≤50mg/L,。,HgSO4Cl-COD。HgSO4+4Cl-葑HgCl42-+SO42-(2),,,:COD·9·INDUSTRIALWATER&WASTEWATERVol.49No.4Aug.,2018[26][27][28][29]203kPa150~170℃165℃180℃2h/2h/15min/5min/2Tab.2Reactionconditionsfordifferentdeterminationmethods2.4Cl-CODCODCl-,COD。ρ(Cl-)/ρ(COD),Cl-。,,Cl-COD。,ρ(Cl-)/ρ(COD),Cl-COD。COD,Cl-,。ρ(Cl-)>2000mg/L,ρ(COD)<100mg/L,[21-22]。2.5()GB11914—1989,1/5~4/5,。(1),,Cl-,;,,。[9],Cl-、,COD。Cl-COD。20%~40%,。2.6COD,Cl-,,。,。、,NaOH[23-25]。2.7,,2。Cl-COD,,6。(0.025mol/L)6Cl-20000mg/LCl-20000mg/L、COD50mg/L,HgSO4m(HgSO4)∶m(Cl-)=20∶1,3(1)。3CODTab.3ResultsofCODdeterminationindifferentheatingunits/℃ρ(COD)=50mg/L/(mg·L-1)/(mg·L-1)/(mg·L-1)/(mg·L-1)/%21256.5、7.2、7.97.237.7、33.5、36.936.016.331458.7、9.6、7.98.740.5、42.7、44.142.48.2416510.3、11.5、10.810.960.9、57.5、56.858.47.7518014.1、18.2、16.616.369.8、70.7、65.168.515.6620035.4、23.9、27.729.090.6、94.4、91.592.229.7,COD,。,,,[HgCl42-],Cl-。,145~165℃,,。3Cl-COD3.1Cl-COD,COD:Cl-,COD-Cl-·10·Cl-COD(CODCl-);Cl-,Cl-COD(COD),CODCOD-CODCl-[30]。Cl-,、,。ρ(Cl-)>10000mg/L,ρ(COD)<100mg/L,Cl-[31]。3.2,,Cl-,HgSO4Cl-,。[28],(0.02mol/L)Cl-,COD。[32]Cl-、COD,,。COD,,[33-34]。,Cl-Cl-、、HgSO4,[35]。3.3(1),,,COD(HJ/T70—2001)。,ρ(Cl-)>20000mg/L[36-37]。[38],,102%~105%,。[39],,,。3.4TOC-CODTOCCOD[40]。[41]CODTOCTOCCOD,TOCCOD。[42]TOCCl-,COD,,。,,、[43]。,Cl-COD。4。Cl-,CODCl-,ρ(COD)≤100mg/Lρ(Cl-)<25000mg/L,ρ(COD)≤150mg/LCl-,,Cl-CODCl-、、HgSO4、ρ(Cl-)<20000mg/L,ρ(COD)>90mg/L,,TOC-CODTOCTOC,,4Cl-CODTab.4ComparisonoftypicalmethodsfordeterminationofCODinhighconcentrationCl--containingwastewater4Cl-、COD,,,,。,,,COD。,,,,。:[1].、,,,:COD·11·INDUSTRIALWATER&WASTEWATERVol.49No.4Aug.,2018[J].,2015,46(3):46-50.[2].[J].,2000,31(1):19-21.[3],,.COD[J].,2015,34(4):106-108.[4].:HJ828—2017[S].:,2017.[5].[D].:,2005.[6].COD[J].,2013,40(10):202-204.[7],,,.COD[J].,2011,8(15):92-92.[8],,,.COD[J].,2013,23(4):55-57.[9],,,.COD[J].,2002,12(3):22-25.[10],,.[J].,2015,(5):215-215.[11].COD[J].,2005,21(4):71-73.[12].CODCr[J].,2016,(5):13-13.[13].COD[J].,2003,19(2):44-45.[14],.COD[J].,2004,35(4):55-57.[15],,,.[J].,1999,11(3):37-39.[16],,,.COD[J].,2013,21(3):16-17.[17].COD[J].,2008,(23):44-44.[18],.COD[J].,2017,(17):58-60.[19],,.COD[J].,1998,14(4):42-44.[20].(COD)[J].,2011,23(12):146-146.[21],.COD[J].,2012,43(3):85-87.[22],.[J].,2016,30(3):51-55.[23],,,.COD[J].,2006,22(2):4-6.[24].COD[J].,2017,(6):45-45.[25],,.COD[J].,2017,(8):37-39.[26],,,.4COD[J].,2004,24(2):231-234.[27],.COD[J].,2014,26(6):42-45.[28],,.COD[J].,2011,36(12):120-123.[29],,,.[J].,2011,34(S2):206-208.[30],.COD[J].,2012,(4):48-49.[31],,.COD[J].,2009,25(24):79-81.[32].CODCOD[J].,2010,24(4):25-27.[33].COD[J].,2016,23(5):98-98.[34],,,.COD[J].,2013,22(3):20-22.[35],,,.COD[J].,
本文标题:高浓度氯离子废水COD测定方法研究进展刘鹏
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