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122Vol．12No．220182ChineseJournalofEnvironmentalEngineeringFeb．20182017－07－022017－09－191993—。E-mail550594338@qq．com*E-mailzgh@tju．edu．cn-PAC*300350-PAC。2、。-PAC。pH、H2O2Fe2+1H2O225mg·L－1。0.15g·L－1PAC4、。PAC4X703A1673-9108201802-0536-08DOI10.12030/j．cjee．201707002TreatmentofpowerplantrecirculatingcoolingdrainagebyFenton’sreagentpreoxidationcombinedwithpowderedactivatedcarbonadsorptionYANGYiGUPingXUSiwenMENGFanyiDONGLihuaZHANGGuanghui*SchoolofEnvironmentalScienceandEngineeringTianjinUniversityTianjin300350ChinaAbstractFenton’sreagentpreoxidation-powderedactivatedcarbonPACadsorptioncombinedprocessfortreatmentofarecirculatingcoolingdrainagefromapowerplantswasdeveloped．FirsttheFenton’sreagentoxi-dationandPACadsorptionmethodsfororganicsremovalwerestudiedrespectively．Itwasfoundthatthetwoprocessesstillhadsomeproblemssuchaspoorintreatmenteffectandhighinchemicalscost．ThereforetheFenton’sreagentpreoxidation-PACadsorptioncombinedprocesswasstudiedandtheinfluencefactorsofthisprocessweretested．TheresultsshowedthatthebestefficiencywasachievedwhenpHvalueofrawwaterwasunchangedthemolarratioofH2O2toFe2+was1andtheH2O2concentrationwas25mg·L－1．Undertheopti-mumconditionwithPACdosageof0.15g·L－1theresultsobtainedfromfour-stagecountercurrentadsorptionprocessshowedthatitwasstableandtheremovaleffectwasgood．Inadditiontheprocesswaslowinoperationcostandtheeffluentqualitycouldmeetthedischargestandards．KeywordsrecirculatingcoolingdrainageFenton’sreagentoxidationpowderedactivatedcarbonadsorptioncombinedtreatmentfour-stagecountercurrentadsorption1。。COD、TN、TP、NH3-N。、。2-3。、4-5。·OH2.73V6-8。Fe3+2-PACFeOH39-10。powderedactivatedcarbonPAC1112413-15。、41216-17。-PAC、-PAC-PAC4。11.1130%H2O2、FeSO4·7H2O、NaOH、、1。1PACTable1PropertiesofPAC/m2·g－1/mg·g－1/mg·g－1/%86968214911.32JJ500、MY3000-6A、pHPP-25、TOCTOC-VCPH、SCM-300、Millipore。1.2。1200mL500mL10g·L－1H2SO4pHH2O2FeSO4·7H2O200r·min－1240g·L－1NaOHpH8.030minnonpurgeableorganiccar-bonNPOC。2PAC100mL250mLPAC200r·min－125℃。4-560min。60min0.45μm-NPOC。30.45μm30、10、31kDaNPOC。4pHNPOCpHTOCCOD18。1.3-PAC41.3.1-PAC4PAC419122。735121Fig．1Testequipmentcomposition2Table2Parametersofmembranemodule/μm0.22/mm1.1/mm0.5/mm270/275/m20.26H2O2FeSO4·7H2O30minNaOHpH8.030minAVV3.6L。1.3.2PAC419-20。2。1、2A3、4B。。11A0.5VA0.3V1。2234PAC2Fig．2TestprocessflowschemeB10minPAC-A0.2VPACA2。33AB0.7VBB0.3V3。44BXPACPAC410min0.5VB。22.13。《》DB12/599-20153COD。3。3＞30kDa、30～10kDa10～3kDa25%。PAC·OH、、21-23。COD＜30mg·L－1。8352-PAC3Table3QualityofrawwaterCOD/mg·L－186～89Cl－/mg·L－11067NPOC/mg·L－116.60～17.10SO2－4/mg·L－1769.8UV254/cm－10.239NO－3/mg·L－1185.9/NTU1.98～4.43F－/mg·L－129.79pH8.4～8.6NO－2/mg·L－130.21/mg·L－11263Na+/mg·L－1781.6/mg·L－11.01K+/mg·L－154.21/μS·cm－12512Ca2+/mg·L－1198.9Mg2+/mg·L－1104.73NPOCFig．3MolecularweightdistributionofNPOCinrecirculatingcoolingdrainage2.22.2.13pH、H2O2Fe2+H2O2。pH5.0H2O2Fe2+1H2O2300mg·L－1。44。4Table4ExperimentalconditionsofFenton’sreagentoxidationpHH2O2Fe2+1H2O2=300mg·L－1H2O2Fe2+pH=5H2O2=300mg·L－1H2O2pH=5H2O2Fe2+14。4pH、H2O2Fe2+H2O2NPOCFig．4EffectofinitialpHmolarratioofH2O2toFe2+andH2O2dosageonNPOCremoval2.2.22。1。NPOC60%COD36mg·L－1。935122。H2O227.5%1000·t－1FeSO4·7H2O350·t－1H2SO4600·t－1NaOH2500·t－14.49·m－318%。＜3kDaPAC。2.3-PAC2.3.1pH。pHpHpH8.5H2O250mg·L－1H2O2Fe2+1PACNPOC5。5apH5.0PACNPOC42.7%pH8.534.3%。PACNPOCPAC0.3g·L－1pH5.0NPOCPAC0.3～0.6g·L－1pHNPOCPAC0.6g·L－1pH8.5NPOC。PACNPOCNPOCPACPACNPOC。5bpHPACNPOC。pHpH。H2O2PAC。5pHPACNPOCNPOCPACFig．5EffectofPACdosageonNPOCremovalandratioofNPOCreducedtoPACdosageindifferentinitialpH2.3.2H2O2100mg·L－111%H2O2100mg·L－1。H2O20、25、5075mg·L－16。6aPAC。PAC0.8g·L－1NPOC55.3%PACPACNPOCPAC1.5g·L－1NPOC62.5%。PACPAC0.4g·L－164%～67%。H2O2PAC。6aH2O2PACPAC0.5g·L－13H2O2NPOC。6bH2O2NPOCPAC0452-PACH2O2。H2O225mg·L－1。6H2O2NPOCNPOCPACFig．6EffectofPACdosageonNPOCremovalandratioofNPOCreducedtoPACdosageatdifferentH2O2dosage2.457、8。5NPOCTable5NPOCineffluentbydifferenttreatmentprocessunderspecificexperimentconditionsNPOC/mg·L－1pH=8.5H2O2Fe2+1H2O2=25mg·L－110.68PACPAC=0.6g·L－18.86-PACpH=8.5H2O2Fe2+1H2O2=25mg·L－1PAC=0.6g·L－15.177NPOCFig．7ChangeofeffluentNPOCindifferentmolecularweight8NPOCFig．8ＲemovalefficienciesofNPOCwithdifferentmolecularweightbydifferenttreatmentprocesses＞30kDa、30～10kDa10～3kDaPAC。8PAC3～1kDa14512＜1kDa2。＞30kDa30～10kDa3～1kDa＜1kDa2PAC。PAC。PAC2-PAC、。2.5-PAC49Fig．9Adsorptionisotherm2.5.10.1～1g·L－1pH、H2O2Fe2+1、H2O225mg·L－1PACNPOCFreundlich9241。x/m=KfC1/ne1x/mmg·g－1Cemg·L－1KfFreundlichmg·g－1L·mg－11/nnFreundlich。91Freundlichx/m=0.2528C2.6725e22.5.2-PAC410NPOCFig．10ChangeofNPOCwithaccumulatedamountoftheeffluentPAC0.15g·L－1NPOC10。10PACPAC。NPOC5.65mg·L－165.6%COD30mg·L－1。2.5.3-PAC4-PAC4。1。NPOC65%COD29mg·L－1100L。2、。PAC60%PAC6000·t－11.14·m－3。31。2452-PAC2pH=5.0H2O2Fe2+1H2O2300mg·L－1NPOC60%。、、。3-PACpHH2O2Fe2+1H2O225mg·L－1。4PAC2-PAC、。5-PAC4NPOC65.6%COD30mg·L－1。1．J．201533S249-522．C∥．2015．2015299-3023．J．2015342565-5704．-FentonJ．201373903-9075．Fenton-J．2010461363-13676ZHUXBTIANJPLIUＲetal．OptimizationofFentonandelectro-FentonoxidationofbiologicallytreatedcokingwastewaterusingresponsesurfacemethodologyJ．SeparationandPurificationTechnology2011813444-4507BLA