KMnO4预氧化强化混凝工艺处理黑臭水的试验研究刘亚南

Vol．9No．1Jan．2019JournalofEnvironmentalEngineeringTechnology9120191．KMnO4J．20199182-88．LIUYNYANGYMLIJCetal．StudyontreatmentofblackandodorouswaterbyKMnO4pre-oxidationenhancedcoagulationprocessJ．JournalofEnvironmentalEngineeringTechnology20199182-88．2018-06-28AA172020321990—[e-mail]*1974—[e-mail]4121222222*1．4000742．100012KMnO4CODCr、UV254KMnO4。SEM。KMnO4pH8.0KMnO425mgL25minCODCr81.76%12.15UV25449.44%11.71KMnO490%。KMnO4X7031674-991X201901-0082-07doi10．3969j．issn．1674-991X．2019．01．012StudyontreatmentofblackandodorouswaterbyKMnO4pre-oxidationenhancedcoagulationprocessLIUYanan1，2，YANGYanmei1，LIJunchao2，WANGHongliang2，TANWei2，WANGKai2，DONGLiwei2，JIANGJinyuan21．NationalEngineeringＲesearchCenterforInlandWaterwayＲegulation，ChongqingJiaotongUniversity，Chongqing400074，China2．ChineseＲesearchAcademyofEnvironmentalSciences，Beijing100012，ChinaAbstractTheremovaleffectoforganicpollutantsinblackandodorouswaterbyKMnO4pre-oxidationcombinedwithconventionalcoagulatingsedimentationtreatmentprocesseswasstudied．Theflocculationperformanceofvariouscoagulantflocculationtreatmentwasanalyzed，andtheremovaleffectsofCODCr，UV254andturbiditybeforeandafteraddingpotassiumpermanganatecomparedandanalyzed．ThetestresultsshowedthatKMnO4pre-oxidationtechnologycouldstrengthenthepolyferricmagnesiumsilicate(PFMS)coagulatingsedimentationprocesstoremoveorganicpollutants．Intheentiredosagerangeofthecoagulationtest，thePFMScoagulanthadagreateffectontheblackandodorouswaterturbidity．Theremovalrateofturbiditywasmuchhigherthanthatofpolyaluminumchlorideandferricchloridecoagulants．TheresultsofSEMcharacterizationshowedthatthePFMSwasaggregatedinatree-likeshape，whichcouldenhancethefunctionsofadsorptionbridgingandnetreplenishmentinthecoagulationprocess．WhenthepHofrawwaterwas8，thedosageofKMnO4was25mgL，andthepre-oxidationtimewas25minutes，thehighestCODCrremovalrateof81.76%couldbereached，whichwas12.15percenthigherthanthesinglecoagulatingsedimentationprocess，whilethehighestUV254removalratewas49.44%，increasedby11.71percentcomparedwiththesinglecoagulatingsedimentation．TheturbidityremovalrateofblackandodorouswaterbeforeandafteraddingKMnO4wasbothabove90%．1KMnO4KeywordsKMnO4;pre-oxidation;coagulationprocess;blackandodorouswater;polyferricmagnesiumsilicate30、1-3。“”2100201898046.7%。4。。、、5。KMnO4、、6-7。KMnO4、KMnO4DOM、、8-10。11KMnO4。12KMnO417.9%。Zhang13MCＲKMnO4TOC、DOM。Tian14KMnO4-FeCl3。Wang15KMnO4。KMnO4CODCr、UV254KMnO4KMnO4。11.11。1Table1TestwaterqualityindicatorspHCODCrmgLNTUUV254cm－1TPmgL6.54～7.95230～35678.3～121．00.3578～0.39114.47～4.951.2HJ-6AFA2204PHBJ-260pHCTL-12HACH2100QSPECOＲDplus200TM4000Plus。KMnO4、Na2SiO3·9H2O、FeSO4·7H2O、MgCl2·6H2O、NaClO3、25%、30%H2O2、PAC、FeCl3、NaOHCOD。PACAl2O332%。。1.3Na2SiO3·9H2O2%SiO225%pH31.5hFeSO4·7H2O、MgCl2·6H2ONaClO3pH。1.4TM4000Plus。·38·91.51.5.1HJ-6A1L2.09mmolL400rmin1min80rmin15min30min。1.5.2KMnO4HJ-6ApH81LKMnO425mgL400rmin1min100rmin20min2.09mmolL400rmin1min80rmin15min30minCODCr、UV254。1.6CTL-12CODCrHACH2100Q0.45μm254nmUV254。22.1pH、Fe+MgSiO2、FeMgNaClO343L93423。2Table2TheresultsoforthogonalexperimentABCDpHFe+MgSiO2FeMgNaClO3gLCODCr%11.01.51.07.560.9221.02.01.510.067.8231.02.52.012.562.4441.51.51.512.563.2251.52.02.07.559.3661.52.51.010.060.2771.81.52.010.062.0781.82.01.012.561.3091.82.51.57.559.393Table3AnalysisoforthogonaltestresultsABCDpHFe+MgSiO2FeMgNaClO3K1191.18186.21182.49179.67K2182.85188.48190.43190.16K3182.76182.10183.87186.96k163.7362.0760.8359.89k260.9562.8363.4863.39k360.9260.7061.2962.32Ｒ2.812.132.653.50D＞A＞C＞BA1B2C2D2A1B2C2D223A1B2C2D2pH1.0Fe+MgSiO22.0FeMg1.5NaClO310.0gL。2.2500、1000、300040001。1。2.32.3.1、32。22。0.84～2.09mmolL2.09mmolL98.81%2.09mmolL。2.09mmolL。·48·1KMnO41SEMFig．1SEMimagesofdifferentmagnifications2Fig．2Ｒemovaleffectofdifferentcoagulantsonturbidity2.3.23。389%5～15min15min3Fig．3Ｒemovaleffectofdifferentstirringtimesonturbidity15min。2.3.3pHpH4。4pHpH5.06.0pH6.0～10.093%·58·94pHFig．4ＲemovaleffectofdifferentreactionpHonturbiditypHpH6.54～7.95pH。2.3.42.09mmolL15minpHCODCr、UV2545。5Fig．5Effectofcoagulationtreatmentofblackandodorouswaterunderthebesttestcondition5CODCr、UV25469.61%、96.86%37.73%。2.4KMnO42.4.1KMnO4KMnO4CODCr、UV2546。6KMnO45～30mgL95%KMnO46KMnO4CODCr、UV254Fig．6ＲemovaleffectofKMnO4dosageonCODCrUV254andturbidity。KMnO45～25mgLCODCrUV254KMnO4KMnO425mgLCODCrUV25474.72%39.81%KMnO425mgLCODCrUV254。KMnO416。2.4.2KMnO4KMnO4CODCr、UV2547。7KMnO4CODCr、UV254Fig．7ＲemovaleffectofKMnO4pre-oxidationtimeonCODCrUV254andturbidity790%。KMnO410min20minCODCrUV254·68·1KMnO4KMnO420minCODCrUV25474.72%39.81%KMnO4CODCrUV254。KMnO4KMnO4KMnO4。CODCrUV25417。2.4.3pHKMnO4pHCODCr、UV2548。8KMnO4pHCODCr、UV254Fig．8ＲemovaleffectofKMnO4pre-oxidationpHonCODCrUV254andturbidity8pH6.07.0pHpH7.097%。pH6.08.0CODCrUV254pH。pH8.0CODCrUV25481.76%49.44%CODCrUV25469.61%37.73%KMnO4CODCrUV25412.1511.71KMnO4。pH8.0CODCrUV254pHKMnO4CODCr、UV254。KMnO418、、、。KMnO4。Mg2+ζ19-22。31KMnO4CODCrUV25412.1511.71、90%。2KMnO4。KMnO4KMnO425mgLKMnO420minpH8.0。1．J．201529-20．CAOCJCHENZLHUANGMS．Studyonformationmechanismandcontrolandpreventivemeasuresofeutrop