次氯酸钠处理含尿素废水实验研究石娟

52环境工程学报Vol.5,No.220112ChineseJournalofEnvironmentalEngineeringFeb.2011石娟陈建铭宋云华*(,100029),pHNaClO,,:40e,pH6~7,NaClO3119~4129g/g,20min,8%X703A1673-9108(2011)02-0275-04Experimentalstudyontreatmentofurea-containingwastewaterwithsodiumhypochloriteShiJuanChenJianmingSongYunhua(ResearchCenteroftheMinistryofEducationforHighGravityEngineeringandTechnology,BeijingUniversityofChemicalTechnology,Beijing100029,China)AbstractThewastewaterwithureawastreatedbysodiumhypochlorite.Theeffectsofreactiontempera-ture,pHofsolution,stirringspeed,dosageofsodiumhypochlorite,reactiontimeandbubblingquantityontheremovalofureawerestudied.Theoptimalconditionsofexperimentwerereactiontemperatureof40e,initialpHofsolutionof6~7,dosageofsodiumhypochloriteof3119~4129g/gandreactiontimeof20min.Inaddition,airstrippingcouldimprovetheremovalrateofureaefficiently,whichcouldincreaseby8%,comparingwiththecasewithoutbubbling.Keywordssodiumhypochlorite;wastewatertreatmen;turea;spectrophotometricmethod:/0(2008BAE64B08):2009-12-08;:2010-01-19:(1984~),,,E-mai:[e-mail]*,E-mai:[e-mail],[1],,,ADC,ADC25,t015%,125kg,,,,[2][3][4-7],3,,O3H2O2Cl2NaClO,,O3H2O2,;Cl2[8],;NaClO,NaClO,NaClO[9-11],[12],,NaClO,pHNaClO,1111UV-2100(1cm);F-20ApH;DF-101S;5ACO-9602,AR;(318%~411%),AR;,AR;,AR;,AR;(36%),AR1.2500mL1000mg/L,pH6.4~6.8,NaOHHClpH,NaClO,,(T)pH(R)NaClO(A)(t),NaClO,,(G),NaClOA,ANaClO,g/g1.3NaClO:GB/T19106-2003:[13-14]pH:F-20ApH:22.1,(HClO)ClO),HClO,,,,NaClO+H2OyHClO+NaOH(1)HClOyHCl+[O](2)HClO+HClyH2O+Cl2(3)NaClONH3CO2[15],NaClO,NH3N2:3NaClO+2CO(NH2)2y2CO2+H2O+3NaCl+N2+2NH3(4)2NH3+3NaClOyN2+3H2O+3NaCl(5):3NaClO+CO(NH2)2yCO2+2H2O+3NaCl+N2(6)2.22.2.1反应温度NaClO3119g/g,675r/min,30min,pH,T,11Fig.1Effectofreactiontemperatureonurearemovalrate1,T,T=40e,,8010%,:T(30e),,T40e,,NaClO,NH3,,2.2.2初始pH值NaClO3.19g/g,40e,675r/min,30min,pH,22pHFig.2EffectofinitialpHonurearemovalrate2762:2,pH6~7,pH,NaClO,NaClOHClO,HClO,pHHClO,HClO,,HClO[16],,HClO,pH2.2.3搅拌转速NaClO3119g/g,40e,30min,R,33Fig.3Effectofagitationspeedonurearemovalrate3,R,R675r/min,:RNaClO,R675r/min,,R2.2.4NaClO投加量40e,675r/min,30min,NaClO(A),44,A,A3119g/g,7410%,0129g/L;A4129g/g,9417%,0173g/L;A,,NaClO,A,NaClO[17],NaClO,NaClO,ClO-[18]3,A,Cl2,,,A3119~4129g/g4NaClOFig.4Effectofsodiumhypochloritedosageonurearemovalrate2.2.5反应时间40e,675r/min,NaClO,,,55Fig.5Effectofreactiontimeonurearemovalrate5,(t15min),20min,NaClO,,HClO,20min2.2.6气量NaClO,NH3,A,NH3,,,NH3,2.2.4,A3119g/g,,,66,30min,27756Fig.6Effectofgasquantityonurearemovalrate8117%,8%,NH3,,,NaClO,6,20min;20minNaClO,,,NaClO,,;,NaClO,,,NaClONH3,,NaClO,,3,:(1),NaClO:40e,pH6~7,NaClO3119~4129g/g,20min(2),,,(3),,,8%[1]..,2001,21(3):50-53[2]MehtaB.J.,DasareB.D.Removalofureafromsolutionbyoxidation:PartI)useofoxidizingagents.IndianJournalofEnvironmentalHealth,1987,29(2):101-108[3]GarridoJ.M.,MendezR.,LemaJ.M.Simultaneousureahydrolysis,formaldehyderemovalanddenitrifieationinamuhifedupflowfilterunderanoxicandanaerobiccond-itions.WaterRes.,2001,35(3):691-698[4]LinChichang,YangMingchien.Ureapermeationandhy-drolysisthroughhollowfiberdialyzerimmobilizedwithure-ase:Storageandoperationproperties.Biomaterials,2003,24(11):1989-1994[5]YangMingchien,LinChichang.Ureapermeationandhy-drolysisthroughhollowberdialyzerimmobilizedwithure-ase.Biomaterials,2001,22(9):891-896[6]GodjevargovaT.,GabmvskaK.Imobilizationofureaseontochemicallymodifiedacrylonitfilecopolymermembranes.JournalofBiotechnology,2003,103(2):107-111[7],,..,1998,20(1):32-35[8],,..,2005,36(6):14-16[9],,..,2003,21(1):38-41[10]..,1997,(1):47-50[11],,,..,2005,27(9):679-682[12],,..,1995,8(2):8-9[13]PaulS.Francis,SimonW.Lewis,KieranF.Lim.Analyticalmethodologyforthedeterminationofurea:Currentprac-ticeandfuturetrends.TrACTrendsinAnalyticalChemis-try,2002,21(6):389-400[14],,,..,2006,26(6):1151-1154[15],,.ADC.,2006,23(6):27-28[16],,..,2001,14(2):32-33[17],,,..,2000,17(12):708-710[18],..:,1983278