MgFe类水滑石法强化混凝深度处理猪场尾水及混凝污泥特性研究黄芷嫣

MgFe。pH、MgFe[nMg∶Fe][Zn2+、Cu2+、Cr]SMXXXRD、SEMFTIR。pH6.5TP、Cr95%、80%35%。pH8.0MgFeZn2+Cu2+85%SMX75%MgFe。。PMS700℃MgFe。。MgFeX713A1672-2043201711-2332-11doi:10.11654/jaes.2017-0563AdvancedtreatmentofpiggerywastewaterviaenhancedcoagulationwithMg/FelayereddoublehydroxidesandanalysisofthecoagulationsludgepropertiesHUANGZhi-yan12,HUZhi-lin12,LIAOZi-cong12,LIUJuan12,CuiLi-hua12,HUANGZhu-jian12*1.DepartmentofNaturalResourcesandEnvironment,SouthChinaAgriculturalUniversity,Guangzhou510642,China;2.GuangdongProvincialKeyLaboratoryofEnvironmentalPollutionControlandRemediationTechnology,Guangzhou510275,ChinaAbstractAfterthesecondstageofbiochemicaltreatment,piggerywastewaterstillcontainsahighlevelofcontaminants,andfurtherpro－cessingisrequired.TheeffectsofinitialpHandMg/Femolarratioontheremovalofwatercontaminantswereinvestigatedinthisstudy.ThecoagulationprecipitateswereanalyzedviaX-raydiffractionXRD,scanningelectronmicroscopySEM,andFouriertransforminfraredspectroscopyFTIR,andthecoagulationsludgewascycledasakindofcatalystforthefirststepofresourceutilization.TheresultsshowedthatwhentheinitialpHvalueofthepiggerywastewaterwasabove6.5,theremovalratesofTPandCrandthereductionofturbidityreachedover95%,35%,and80%,respectively.WhenthepHvaluewashigherthan8.0,theremovalratesofZn2+andCu2+reachedover2017－04－142017-07-051996—。[e-mail]*[e-mail]515090932017A0202160252016A0303104562015-152015080200732016K0014201610564065ProjectsupportedTheNationalNaturalScienceFoundationofChina51509093TheScienceandTechnologyProjectofGuangdongProvince2017A020216025TheNaturalScienceFoundationofGuangdongProvinceChina2016A030310456TheScienceandTechnologyInnovationProjectofWaterConservancyofGuangdongProvince2015－15TheScienceandTechnologyProgramofGuangzhou201508020073TheResearchFundProgramofGuangdongProvincialKeyLaboratoryofEnvironmentalPollutionControlandRemediationTechnology2016K0014TheSouthChinaAgriculturalUniversityProvincialUndergraduateInnovationProject20161056406520173611:2332-2342201711JournalofAgro-EnvironmentScience.MgFe[J].,2017,36112332-2342.HUANGZhi-yan,HUZhi-lin,LIAOZi-cong,etal.AdvancedtreatmentofpiggerywastewaterviaenhancedcoagulationwithMg/Felayereddoublehydroxidesandanalysisofthecoagulationsludgeproperties[J].JournalofAgro-EnvironmentScience,2017,3611:2332-2342.MgFe121212121212*1.5106422.5102753212017111Table1Characterisicsoffeedingwater85%,andtheremovalrateofSMXcouldreachover75%.However,theMg/Femolarratiohadlittleeffectoncoagulation.Analysisofthecoagulationsludgeshowedthatmainlylayereddoublehydroxidesandironphosphatemineralswereformed.Atlast,wepreparedcatalystswithcoagulationsludgeundertheconditionsof700℃andlimitedoxygenandfoundthatwiththesameamountofpotassiummonopersulfatePMSaddition,catalystspreparedwithcoagulationsludgehadhighercatalyticactivitythanthosepreparedwithMg-FeLDHs.Thisfindingshowsthegreatpotentialoftheobtainedcoagulationsludgeinresourceutilization.KeywordsMg/Felayereddoublehydroxides;enhancedcoagulation;piggerywastewater;heavymetals;antibioticLayereddoublehydroxidesLDHs[M2+1-xM3+xOH2]An-x/n·mH2OM=metalA=anion[1]。LDHsM3+M2+[2][3]。LDHs。Goh[4]Mg/AlAsO2-4、CrO2-4、VO3-4、BrO-3[5]Mg/AlBrO-3。MgAlAl[6]MgAlAl。FeMg[7]Fe[8]。MgFe[9-10]。COD、。UV254TOC、DOC。85%[11]。。。、[12]。[13]。MgFePMS、。11.1[14-15]。1.0g·L-124h。2.83g·L-1K2Cr2O7、4.40g·L-1ZnSO4·7H2O、3.90g·L-1CuSO4·5H2O、0.5g·L-1SMXZn2+、Cu2+、CrSMX。1L0.0439gKH2PO4、0.0764gNH4Cl、0.1804gKNO30.1877g2.0mLZn2+、Cu2+、CrSMX。1。pHCOD/mg·L-1NH+4-N/mg·L-1NO-3-N/mg·L-1TN/mg·L-1TP/mg·L-1/NTUZn2+/mg·L-1Cu2+/mg·L-1Cr/mg·L-1SMX/mg·L-16~8200~50020~5520~60100~2505~10030~700.32~39.80.06~8.80~0.210.05~1.096~8200~40020~4020~3050~8012~2020~451~21~21~20.15~0.25MgFe233336111.2pHpHCODNH+4-NNO-3-NUV2600TNTPSGZ-BZA3000SMX--LC-MS-MSWatersCorp.ACQUITYUPLCBEHC182.1mm×50mm1.7μm35℃。B。1.3pHMg∶FenMg∶FeMgFe。250mLpHpH4.605.556.527.558.489.14nMg∶Fe2.4∶160mg·L-1nMg∶Fe2.0∶12.4∶12.8∶13.2∶13.6∶14.0∶1pH8.2160mg·L-1。MgFenMg∶Fe2.0∶1MgFeFe[nMg∶Fe0∶1]60mg·L-1[nFe=1.07mmol·L-1]MgnMg∶Fe1∶051mg·L-1[nMg=2.13mmol·L-1]。250mL150r·min-12min50r·min-120min30minCOD、、TP、NO-3-N0.45μm0.22μmNH+4-NUV254Zn2+Cu2+CrSMX。1.4MgFeMgFe[116]。53g·L-1FeCl3·6H2O120g·L-1MgCl2·6H2O[nMg∶Fe3∶1]pH9~10、24hMgFe360℃。1.5XRDBrukerD8ADVanceXKαλ=0.15418nmLynxExe40kV40mA0.02°17.7s·-14°～70°。FTIRPerkinElmer17254000~400cm-14cm-1。SEMHitachiS-3700NEDS20kV80μA。1.6[nMg∶Fe=3.0∶1]360℃。5.0g700℃2h。5.0gMgFe[nMg∶Fe=3.0∶1]。10mg·L-1B250mL0.05g200r·min-10.05、0.1、0.15、0.2、0.3、0.4gPMS。10min0.45μm554nmB。22.1MgFe2.1.1pHpH1。1apH4.60~5.5537.3%pH6.5281.33%pH=7.5593%1bCOD80%~90%pH=7.5589.02%1cpHTPpH6.5297.46%1d~1fTN、NH+4-N、NO-3-N20%。NH+4-N[17]MgFeNH+4-N。MgFe[18]pH7FeMgTN、NO-3-N、NH+4-N、TPMgFe2334321201711。pH7MgFeXRDCO2-3PO3-4SO2-4HPO2-4F-Cl-Br-NO-3[19-20]。MgFePO3-4TPNO-3NO-3-N。TNNO-3-N、NH+4-N[21]TNNH+4-NNO-3-N。COD[22]MgFeCOD。pH2。pHZn2+Cu2+pH=9.20pH7.47Zn2+Cu2+30%。pHCrpH1pHTN、NO-3-N、NH+4-N、TP、COD、Figure1EffectofinitialpHonremovalofTNNO-3-NNH+4-NTPCODandturbidityaftercoagulation100806040200pH/%4.605.556.527.558.489.14a.86420/mg·L-190858075pH/%4.605.556.527.558.489.14b.COD806040200