二硝基氯苯废水预处理技术研究肖羽堂

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肖羽堂 王继徽(,410082) ,,,,COD,。      ,、,,1mg/LBOD510%[1]。  ,,,,,1.50,,[2]。,,。,。1 处理机理1.1 ,[3]。   ○O2NCl+2Fe+12H+O2N     ○H2NCl+4H2O+2Fe2+H2N  ,,。1.2 [4],。,,,,,,。:   Fe-2e  Fe2+ E°(Fe2+/Fe)=-0.44V  :   2H++2e  H2↑ E°(H+/H2)=0V  O2:   O2+4H++4e  2H2O E°(O2)=1.23VO2+2H2O+4e  4OH- E°(O2/OH-)=0.40V1996-06-18。·264·                  199717  ,。,H,,。,,,。,,,。1.3 ,Fe2+Fe3+。Fe2+Fe3+,pHO2,Fe(OH)2Fe(OH)3。:   Fe2++2OH-  Fe(OH)2↓4Fe2++8OH-+O2+2H2O  4Fe(OH)3↓  Fe(OH)3,Fe(OH)3。,、。,,,。2 试验部分2.1 ,COD1000~1200mg/L,pH0.7~1.0,800~1200,BOD5/COD0.023,。2.2 ,,1mol/L,。。:,,。:1.0m、5cm,,,,,。pH8~9,。4 结果与讨论3.1 3.1.1 ,pH,,,,。12。1 123ApHB/%C/min542043406230  2CODK1、K2、K33,R(Kjmax-Kjmin)1。,COD:A≈CB,pH,,。12,:pH5,4%,40min。3.1.2 2,COD。·265·5                      ,。:pH5,4%,3。3。2 L9(33)ABCpH/COD/mgL-1COD/%1234567895554446664324324322040304030203020408.07.77.37.67.27.08.48.17.968806060656558556524624025424726531027528126855.156.253.654.951.743.449.848.751.1K1K2K3R55.050.049.95.153.352.249.43.949.154.151.75.0   ()COD548mg/L,650,pH0.7。3 /minpHCOD/mgL-1COD/%1020304050605555557.78.08.38.78.88.960860860860860860845138630024623222826.036.550.759.961.962.5  3,10~40min,COD;40min,COD,。3.2 3.2.1 pH0.7pH5,2.5~3.2cm/min,pH10,COD、BOD5,4。3.2.2 pH5,2.5~3.2cm/min,pH10,COD、BOD5,5。·266·                  1997173.3   ,COD65%93%,,,。6。4 COD/mgL-1COD/%//%BOD5/mgL-1BOD5/COD12357356058947.148.345.628022030070.576.868.4216.6221.2213.80.3780.3950.36357447.027071.9217.0.379   ()COD1083mg/L,950,pH5。5 COD/mgL-1、COD/%/、/%BOD5/mgL-1BOD5/COD123354.1392.1376.967.363.865.275506092.194.793.7162.5189.4176.30.4590.4830.468374.465.46293.5176.10.4706 pHCOD/mgL-1/BOD5/COD57.0~8.51000~1200350~500800~100050~800.0230.4754 结论(1),COD,,。(2):pH5,pH10,40~60min。(3),,,。,。致谢 向参与部分试验工作的张质彬同志表示感谢!1 ()Я.М..().:,1961.142.(下转第286页)·267·5                      3 结语(1),。,(CCA)。(2),H+,。(3),,。   1 .().:,1982.132~133.2 ..:,1986.121~136.3 ..:,1994.455~456.StudyonSulphurationDearsenicationofLeachingLiquorfromArsenic-ContainingAlkalineDregsGeneratedinAntimonySmeltingXuLishiandLiuQiong(InstituteofMetallurgicalChemistry,AdministrativeOfficeofStannaryAffairs,Lengshuijiang417500)Abstract:Themajorfactorsaffectingsulphurationdearsenicationofleachingliquorfromarsenic-containingalkalinedregsgeneratedinantimonysmeltingarestudied,andtheeffectsofhydrogenionconcentrationandtemperatureonarsenicremovalefficiencyareanalysed.Keywords:antimonysmelting,arsenic-containingalkalinedregs,sulphurationdearsenication.(上接第267页)2 ..:,1992.268,305.3 .().,1989,9(6):7.4 ..,1994,16(1):18.StudyonaPretreatmentProcessforDinitro-ChlorobenzeneWastewaterXiaoYutangandWangJihui(HunanUniversity,Changsha410082)Abstract:Dinitro-chlorobenzenewastewaterhasbeenpretreatedbyanironscrapprocess,resultingintheconversionofdinitro-chlorobenzenetodiamino-chlorobenzene,effectiveremovalofcolourandCODandincreaseinthebiodegradabilityofthewastewater.Keywords:dinitro-chlorobenzenewastewater,pretreatment,ironscrapprocess,biodegradability.·286·                  199717

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