Fe2NaClO深度处理焦化废水的研究蒋辉

35420104ENVIRONMENTALSCIENCEANDMANAGEMENTVol.35No.4Apr.2010:2009-10-22:(1982-),,,。::1674-6139(2010)04-0085-05Fe2+/NaClO蒋辉,范迪,王娟(,266033)　:研究采用NaClO产生的HClO代替Fenton试剂中的氧化剂H2O2,并与Fe2+协同处理焦化厂二级生化出水。结果表明:NaClO投加量,溶液的初始pH值,Fe2+投加量,反应温度和投加方式是影响Fe2+/NaClO处理焦化废水效果的重要因素,而反应时间对处理效果的影响不大。在相同实验条件下,Fe2+/NaClO协同处理焦化废水的效果优于Fenton试剂。NaClO投加量为2mL/L,pH=3,Fe2+投加量为40mg/L,反应时间为10min,反应温度为25℃～45℃的最佳实验条件下,Fe2+/NaClO对CODcr的去除率和色度的去除率分别为62.2%和81.7%,剩余CODcr能降到136mg/L,色度减小为64倍,达到了国家二级排放标准的要求。:焦化废水;深度处理;次氯酸钠:X703.1:AResearchonAdvancedTreatmentofCokingWastewaterbyFe2+/NaClOJiangHui,FanDi,WangJuan(InstituteofEnvironmentalMunicipalEngineering,QingdaoTechnologicalUniversity,Qingdao266033,China)Abstract:Inthispaper,weusedNaClOtoproduceHClOforreplacingH2O2intheFentonreagenttotreatcokeplantbio-chemicaleffluent.TheresultsshowedthatthedosageofNaClO,thepHvalue,thedosageofFe2+,reactiontemperatureanddo-singmethodsbutnotreactiontimeplayedasignificantroleintheFe2+/NaClOoxidationprocess.Fe2+/NaClOcollaborativetreat-mentofCokingWastewaterwasbetterthantheFentonreagentinthesameexperimentalconditions.UndertheconditionsofpH=3.0,NaClOdosageof2mL/L,Fe2+additionof40mg/L,reactiontimeof10min,temperature25℃～45℃,Fe2+/NaClOforcokingwastewatertreatmentworkedbestanditsCODcrremovalandcolourremovalwererespectively62.2%and81.7%.There-mainingCODcrcouldbereducedto136mg/Lwhilecolourwasreducedto64times.Theeffluentcouldreachsecondclassnationaldischargestandard.Keywords:cokingwastewater;advancedtreatment;sodiumhypochlorite　　,,,。A/OA2/O,、COD,。Fenton[1],H2O2,,。Na-ClOH2O2,CODcr,,。Fe2+/NaClO[2-4]Fenton,HClOFe2+HO·。,,。HClO(O-2·),(HO·)O-2·+HClO—O2+HO·+Cl-HClOFe2+,(HO·)Fe2++HClO—HO·+Fe2++Cl-,HO·,R·:RH+HO·—R·+H2O·85·35420104·Fe2+/NaClOVol.35No.4Apr.2010R·+HClO-HO·+RCl,。1　1.1　。1。1　CODcr(mg/L)300～400150100()350～4008050pH7.0～10.06～96～91.2　(10%);(30%);(AR);FeSO4·7H2O(AR);,。1.3　PHS-3C;JHR-2COD;;(0.001)。1.4　CODcr:(GB11914-89);:(GB11903-89)。1.5　600mL,pH,,Fe2+NaClO,,pH10,,,CODcr。2　2.1　,Fe2+/Na-ClO。2.1.1　NaClO投加量Fe2+80mg/L,pH3,25℃,10min,NaClOCODcr1。1　NaClO　　1,NaClOCODcr,NaClO,CODcr。NaClO1.2mL/L(Fe2+/NaClO66.7g/L),CODcr38.3%,64.5%;NaClO2mL/L(Fe2+/NaClO40g/L),CODcr180mg/L,50.0%,NaClO,CODcr,。80,,NaClO,。,NaClO,HClO,HO·,;NaClO,H+,HClO,HO·,CODcr。NaClO2mL/L。2.1.2　pH值NaClO2mL/L,Fe2+80mg/L,25℃,10min,,·86·35420104·Fe2+/NaClOVol.35No.4Apr.2010pH2、3、4、5、6、7。pHCODcr2。2　pH　　2,pHCODcr。pH,CODcr,。pH=3,,CODcr,54.1%77.8%。,。,HClO,,。pH,pH,NaClOHClO,。,pH=3。2.1.3　Fe2+投加量NaClO2mL/L,pH=3,25℃,10min,Fe2+CODcr。3。3　Fe2+　　3,Fe2+CODcr。Fe2+,CODcr,CODcr。Fe2+40mg/L(Fe2+/NaClO20g/L),CODcr118mg/L,,61.9%。Fe2+,CODcr,。Fe2+80mg/L(Fe2+/NaClO40g/L),CODcr,。3,Fe2+。Fe2+,,,。Fe2+20mg/L～120mg/L(Fe2+/NaClO10g/L～60g/L),70%～80%。,Fe2+,Fe2+HClOHO·,Fe2+HO·,Fe2+HO·,。,Fe2+40mg/L。2.1.4　反应时间NaClO2mL/L,pH=3,Fe2+40mg/L,25℃,CODcr。4·87·35420104·Fe2+/NaClOVol.35No.4Apr.2010。4　　　4,Fe2+/NaClO,5,CODcr164mg/L,105,CODcr58.7%73.7%。,CODcr,20,CODcr。10,80%。,,。,,,,·OH,CODcr;,,,4,10min,。10。2.1.5　反应温度NaClO2mL/L,pH=3,Fe2+40mg/L,10min,CODcr,5。5　　　5,CODcr,25℃～45℃,CODcr,CODcr102mg/L,58%。,CODcr,。,。,,72%。,,;,。5,25℃～45℃,。,HClO,,。,Fe2+/NaClO25℃～45℃。·88·35420104·Fe2+/NaClOVol.35No.4Apr.20102.1.6　NaClO投加方式的影响NaClO2mL/L,pH=3,Fe2+40mg/L,10min,25℃,2,NaClOCODcr,。2。2　NaClOCODcr61.5%63.1%63.8%78.2%80.4%81.2%　　2,NaClOCODcr。,,NaClO,HClO,HClOHO·,HClO,。,HClO,HO·,CODcr。2,,CODcr。,,,。2.2　Fe2+/NaClOFentonpH=3,Fe2+40mg/L,25℃,10min,0.4mL/L、0.8mL/L、1.2mL/L、1.6mL/L、2.0mL/L、2.4mL/L,,Fe2+/NaClOFenton。67。6　Fe2+/NaClOFentonCODcr7　Fe2+/NaClOFenton(下转第110页)·89·35420104·Vol.35No.4Apr.20104　、,,:1、、,,,,。2、,2mg/L,0。99%。20mg/L,77%。12mg/L20mg/L,10%50%。:[1]陈进富.油田采出水处理技术与进展[J].环境工程,2000,8(1):18-20.[2]Dan,D.C.ProducedWaterRegulationsinUnitedStates:Then,NowandintheFuture,paperSPE77839presentedatthe2002SPEAnnualTechnicalConference,Sanntonio,TX,September29-October02.[3]张逢玉,吕阳.悬浮污泥过滤工艺在油田污水深度处理中的应用[J].现代化工,2007,28(8):55-58.(上接第89页)　　67,,Fe2+/NaClOFenton。Fe2+/NaClO,CODcr,NaClO2mL/L,CODcr,;Fenton,CODcr,,H2O21.6mL/L,CODcr,56.9%71.4%。67,,Fe2+/NaClOFenton。,1.6mL/L2mL/L,FentonFe2+/NaClO。,FentonCODcr56.9%71.4%,CODcr155mg/L,100;Fe2+/NaClOCODcr62.2%81.7%,CODcr136mg/L,64,《(GB8978-1996)》《(GB13456-92)》。3　(1)NaClOpHFe2+/NaClO,,NaClO2mL/L,pH=3。(2)Fe2+CODcr,,Fe2+40mg/L。(3)Fe2+/NaClO,Fe2+/NaClO,,10min。(4)25℃～45℃,。,HClO,,。(5)NaClOCODcr,,,。(6),Fe2+/NaClOFenton。NaClO2mL/L,pH=3,Fe2+40mg/L,10min,25℃～45℃,Fe2+/NaClOCODcr62.2%81.7%,CODcr136mg/L,64,《(GB8978-1996)》《(GB13456-92)》。:[1]王发珍,左东升,李天增,等.Fenton试剂处理苯酚废水的研究[J].环境保护科学,2008,34(4):18-20.[2]刘光明,孔令仁,刘栋,等.Fe2+/HClO氧化处理β萘酚模拟废水的研究[J].工业水处理,2005,125(2):78-82.[3]张乃东.UV/Fenton法处理水中的苯酚的研究[J].哈尔滨商业大学学报,2001(3):61-67.[4]胡巧开,揭武,邓真丽.Fe2+/NaClO处理间甲酚废水的研究[J].上海化工,2007,32(3):14-16.·110·