电化学降解焦化废水的研究田禹

电化学降解焦化废水的研究田禹1,王强1,李捍东2,于秀娟1,凌海波3,金蓉1(1.哈尔滨工业大学,黑龙江哈尔滨150090;2.中国环境科学研究院,北京100012;3.武汉大学,湖北武汉430072):选用Ti/Ir2O3/RuO2为阳极,C-PTFE气体扩散电极为阴极协同降解焦化废水。结果表明,电化学方法对焦化废水具有显著的氧化降解作用。通过实验,考察了苯酚浓度、电流密度、电解质浓度、pH等因素对苯酚去除效率的影响,从而确定处理的最佳处理条件。最后,还指出了该技术所需要研究的主要技术方向。:污水处理;协同作用;焦化废水:X703:A:1006-8759(2005)02-0034-03STUDYOFDEGRADATIONOFCOKINGWASTEWATERBYELECTROCHEMICALMETHODTIANYu1,WANGQiang1,LIHan-Dong2,YUXiu-Juan1,LINGHai-Bo3,JINGRong1(1.HarbinInstituteofTechnology,Harbin150090,China;2.ChineseResearchAcademyofEnvi-ronmentScience,Beijing100012,China;3.WuhanUniversity,Wuhan430072,China)Abstract:ByusingTi/Ir2O3/RuO2asanodeandgas-diffusingelectrodeC-PTFEascathodetotreatcokingwastewater,wefindthatelectrochemicalmethodiseffectiveindegradingcokingwastewater.Throughexperiments,theremovalefficienciesunderdifferentconditions,suchascon-centrationofphenol,currentdensity,concentrationofelectrolyteandpHarestudied.Atlastthebestconditionsareensured.Themaindevelopingdirectionofthetechnologyispointout.Keywords:wastewatertreatment;electrochemicalmethod;cokingwastewaterEnergyEnvironmentalProtectionVol.19,No.2Apr.,200519220054:2004-10-08、、、,,。,,,、,。、,。、,,、、、,,.。,,COD200～30mg/L。100mg/L。,。Ti/Ir2O3/RuO2,C-PTFE,,,/(mg·L-1)100200300/%9991721。11.1Ti/Ir2O3/RuO2;C-PTFE();();721();DH1718E-4();SP-780();TOC()。1.21。,100ml,。,,。1.3,,(1-1),(1-2)。R+MOx(HO·)※CO2+MOX+ZH++Ze-(1-1)R+MOX+1※RO+MOX(1-2)MOX(HO·)MOX+1,HO·,,。,(Ti/Ir2O3/RuO2)DSA,HO2·、HO·,。,,。,“”“”“”[17]。,O2,,O2H2O2。(H2O2)[5]。(1-3),(1-4),(1-5)。:O2+2H++2e-※H2O2(1-3):O2+H2O+2e-※HO2-+OH-(1-4)HO2-+H2O2+2e-※H2O2+OH-(1-5)22.1100mg/L,200mg/L,300mg/L,1。1,,。,。,。2.218mA/cm2,25mA/cm2,32mA/cm2,39mA/cm2,46mA/cm2,,2。2,,。,18mA/cm2,:15.2V、16℃;46mA/cm2,:24.2V、41℃。、。39mA/cm2。2.30.01mol/L,0.02mol/L,0.03mol/L,0.05mol/L,0.1mol/L,/(mA·cm-2)1825323946/%3058821001002田禹等电化学降解焦化废水的研究·35·pH2712/%91.710091.24pH,3。3,,。0.01mol/L0.02mol/L,100min100%,。0.1mol/L,100min,68%。,,,。,,、。、,0.02mol/L。2.4pH2,7,12pH,,4。4,pH。,pH,:,。pH12,100min91.9%,,,pH2,100min44.8%,。,,。pH,。3,:(1),;(2),;(3)pH,;(4),。,:100mg/L,I=1.1A(39mA/cm2);0.02mol/L;pH。,100min,100%,TOC82.8%,COD85.7%(COD300mg/L)。CO2H2O。;,,;,,,。。,,:。,,,,。,:O2,;H2O2H2OO2。:H2,;。,,,。,COD,,,。,。/(mol·L-1)0.010.020.030.050.1/%1001009582683·36·192