高浓度切削液废水电絮凝破乳及影响因素实验研究吴娜娜谭有晨李锦卫刘强姜成

47420192GuangzhouChemicalIndustryVol.47No.4Feb.2019*1121211101682518055。－－316、20.0mA/cm2、4.0cm、70.0minpH=8.0CODCr97.4%＞＞pH＞。CODCr。CODCrX703.1A1001－9677201904－0026－05*———/－Fenton51778374201501070L20154512017023。1985－。。ExperimentalStudyonElectrocoagulationandDemulsificationofHighConcentrationCuttingFluidWastewaterandItsInfluencingFactors*WUNa－na1TANYou－chen1LIJin－wei2LIUQiang1JIANGCheng－chun21SchoolofMunicipalandEnvironmentalEngineeringShenyangJianzhuUniversityLiaoningShenyang1101682EngineeringTechnologyDevelopmentCenterofUrbanWaterＲecyclingShenzhenPolytechnicGuangdongShenzhen518055ChinaAbstractThehigh－concentrationcuttingfluidwastewaterwassubjectedtothedemulsificationexperimentbyelectricflocculationmethodandtheinfluenceofexperimentalconditionsonthedemulsificationeffectwasinvestigated.TheexperimentalresultsshowedthatthedemulsificationeffectwasthebestandtheremovalrateofCODCrcanreach97.4%whenanode－cathodematerialwasaluminumplate－316stainlesssteelcurrentdensitywas20.0mA/cm2platespacingwas4.0cmreactiontimewas70.0minandpHwas8.0.TheorderofthemaininfluentialfactorsofelectrocoagulationanddemulsificationwereasfollowscurrentdensityplatespacingpHreactiontime.Theelectrocoagulationmethodcanquicklyandefficientlyachievethedemulsificationeffecttoachieveoil－waterseparationandremoveCODCrinthehigh－concentrationcuttingfluidwastewateratthesametimewhichreducedtheprocessdifficultyofsubsequentdeeptreatmentandhadagoodapplicationandpromotionprospect.KeywordscuttingfluidwastewaterdemulsificationtheremovalrateofCODCrelectrocoagulationorthogonalexperiment、、、、、、、1－3。－。4－5。、、、6－9。10－11。47427。12pH=2.0CODCr60.0%pH。－13－14。Ghafari15PACPAC2.0g/LpH7.5CODCr43.1%。CODCr16。。。17。18CODCr94.6%。CODCr－、CODCr、。11.1CODCr10.0×104mg/LpH7.8。1。。××200.0mm×150.0mm×150.0mm××140.0mm×140.0mm×3.0mm100.0mm。1Fig.1Electroflocculationexperimentaldevice1.21.2.13.0L316316－－。20.0mA/cm2、4.0cm、60.0minpH=7.8CODCrCODCr。1.2.2CODCr3.0L－－。、、pHCODCrCODCr。1.2.3CODCr。3.0L－－。、、pHCODCr34L1634。1。1Table1Orthogonalexperimentfactorsandlevels/mA/cm2/cm/minpH120.03.560.07.0225.04.070.08.0330.04.580.09.01.3pHpHCODCrGB11914－89191CODCrCODCr=CODCr－CODCrCODCr×100%1CODCr———mg/LCODCr———mg/L22.12316、、－CODCr。2CODCrCODCr90.0%－－316CODCr97.0%－－CODCr50.0%。28201922CODCrTable2CODCrremovalrateofcuttingfluidwastewaterbydifferentanodeandcathodematerialsCODCr/mg/LCODCr/%3163000.097.010000.090.010000.090.031642000.058.050000.050.019000.081.0。Al3+Fe3+MOH3、、。O2H2－20。FeOH3FeOH2、－316。2－8→AlAl3++3e－24OH→－O2+2H2O+4e－32H2O+2e→－2OH－+H24Al3++OH→－AlOH2+5AlOH2++OH→－AlOH+26AlOH+2+OH→－AlOH37AlOH3+OH→－AlOH－489－13→AlAl3++3e－92H++2e→－H210Al3++H2→OAlOH2++H+11AlOH2++H2→OAlOH+2+H+12AlOH+2+H2→OAlOH3+H+132.2CODCr2.2.1220.0mA/cm2、4.0cmpH=7.8CODCr。260.0minCODCr60.0minCODCr97.0%CODCr97.0%。Al3+Al3+CODCr60.0minAl3+CODCr。60.0min。2CODCrFig.2EffectofreactiontimeonCODCrremovalrate2.2.234.0cm、60.0minpH=7.8CODCr。3CODCrFig.3EffectofcurrentdensityonCODCrremovalrate3CODCr5.0mA/cm2CODCr68.0%20.0mA/cm250.0minCODCr91.0%CODCr97.0%。21。Al3+OH－。H2CODCr。20.0mA/cm2CODCrH2。20.0mA/cm2。474292.2.3420.0mA/cm2、60.0minpH=7.8CODCr。4CODCrFig.4EffectofplatespacingonCODCrremovalrate4CODCrCODCr90.0%4～5cmCODCr97.0%1.0cm6.0cmCODCr90.0%。CODCr。CODCr。4.0cm。2.2.4pH520.0mA/cm2、4.0cm60.0minpHCODCr。5pHCODCrFig.5EffectofpHonCODCrremovalrate5pHCODCrpH=8.0CODCr97.0%pH=2.0CODCr55.0%。CODCr。Al3+AlOH3。AlOH38AlOH－422AlOH－4OH－3。pH8.0。2.33。3Table3Orthogonalexperimentresults/mA/cm2/cm/minpHCODCr/%1120.013.5160.017.096.32120.024.0270.028.097.43120.034.5380.039.096.14225.013.5270.039.091.25225.024.0380.017.092.36225.034.5160.028.092.47330.013.5380.028.094.28330.024.0160.039.094.59330.034.5270.017.095.2K1289.80283.20283.20283.80K2275.91284.19283.80284.01K3283.89283.71282.60281.79K196.6093.994.4094.60K291.9794.7394.6094.67K394.6394.5794.2093.93Ｒ4.630.830.400.733Ｒ＞＞pH＞20.0mA/cm2、4.0cm、70.0minpH=8.0。CODCr97.4%。31CODCr316CODCr。220.0mA/cm2、4.0cm、70.0minpH=8.0－CODCr97.4%。3、、、。30201921.J.20104466－9.2.J.20082440－42.3SilvaVFBatistaLNDeＲobertisEetal.ThermalandrheologicalbehaviorofecofriendlymetalcuttingfluidsJ.JournalofThermoelectricity20161232973－980.4.—D.2016.5MKobyaCCiftciMBayramogluetal.StudyonthetreatmentofwastemetalcuttingfluidsusingelectrocoagulationJ.SeparationandPurificationTechnology2007603285－291.6.J.201125343－4668.7EmilyNTummonsVolodymyrVTarabaraJiaWeiChewetal.Behaviorofoildropletsatthemembranesurfaceduringcrossflowmicrofiltrationofoil－wateremulsionsJ.JournalofMembraneScience2016500211－224.8ChangQWangXWangYetal.Effectofhydrophilicmodificationwithnano－titaniaandoperationmodesontheoil－waterseparationperformanceofmicrofiltrationmembraneJ.DesalinationandWaterTreatment201657114788－4795.9.D.2018.10.D.2013.11.J.201838381－85.12.－J.201737168－72.13.－J.201538S1241－245280.14.J.20161041847－1852.15ShahinGhafariHamidiAbdulAzizMohamedHasnainIsaetal.ApplicationofresponsesurfacemethodologyＲSMtooptimizecoagulation－flocculationtreatmentofleachateusingpoly－aluminumchloridePACandalumJ.JournalofHazardousMaterials20091632650－656.16SYuBratskayaAVPestovYuGYatluketal.Heavymetalsremovalbyf