臭氧生物活性炭对有机物分子量分布的影响舒诗湖

2007,27(5)638~641ChinaEnvironmentalScience1,2*,3,3,3(1.,1500902.,3100143.,200092)()(TOCUV254)(MW).(AOC).,AOC(NOM)MW1kDa.MW1kDa(DOC)53%~67%,AOCDOC2.65%~5.91%,DOC-AOC.(AOC)X703A10006923(2007)05063804Influenceofozonation/BACprocessonmolecularweightdistributionoforganicmatter.SHUShi-hu1,YANMin2*,SUDing-jiang3,CAIYun-long3,GAONai-yun3(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China2.CollegeofCivilEngineeringandArchitecture,ZhejiangUniversityofTechnology,Hangzhou310014,China3.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China).ChinaEnvironmentalScience.2007,27(5)638~641AbstractMolecularweight(MW)distributionoforganicmatter(measuredasTOCandUV254)wasmeasuredinapilot-scalefilterofanozonation/BAC(biologicalactivatedcarbon)processinawatertreatmentplantinSouthChinaondifferentsamples:rawwater,watersamplesaftersedimentation,sandfiltration,ozonationandBACfiltration.MWdistributionofassimilableorganiccarbon(AOC)inrawwaterwasstudied.AOCwasmainlyrelatedtonaturalorganiccarbon(NOM)withMW1kDa(1000dalton).ThefractionoftheNOMwithMW1kDaoccupied53%~67%ofdissolvedorganiccarbon(DOC)whileAOCoccupiedonly2.65%~5.91%ofDOC.Ozonation/BACprocessremovingalargepartofDOCwouldnotnecessarilyresultinareductioninAOC.Keywordsorganicmattermolecularweightdistributionozonation/BACprocessassimilableorganiccarbon(AOC)(MW).,[12].(AOC).AOC,.,.AOC,AOC,AOC.,AOC,AOC.11.1.,.20070130(Y506032);(20050203)*,,[e-mail]5639..160mm,6m,..300mm,3m,,1mm,2~3mm.2m.24t/d,1.20mg/L,10min,(EBCT)8.6min.1.21.2.1.MiliporeYMAmicon,.,4.,0.45µm,30k,10k,3k,1kDa(1kDa1000Dalton).UV254UV751GD/;TOCPhoenix8000TOC..,300mL,3.32×103m2..,0.1MPa.1.2.2AOC[3]VanDerKooij[4]:P17NOX,,P17NOX,22~25,P17NOXAOC.22.11.1,+(),UV254,MW30kDaUV254100%,100%;MW30k~10kDaUV25486%,57%,14%,14%;MW10k~3kDaUV25480%,60%,40%,20%;MW3k~1kDaUV25444%,22%,44%,22%,,UV254;MW1kDaUV25455%,,18%,27%.1UV254(cm1)Table1MWdistributionofUV254(cm-1)indifferentstagesofwatertreatment30kDa30k~10kDa10k~3kDa3k~1kDa1kDa0.0080.0070.0050.0090.01100.0040.0010.0080.01000.0030.0020.0070.01000.00200.0030.00800.0010.0010.0050.005+TOC2.2TOC(mg/L)Table2MWdistributionofTOC(mg/L)indifferentstagesofwatertreatment30kDa30k~10kDa10k~3kDa3k~1kDa1kDa0.3770.2130.1510.5661.4880.1730.1350.0510.5601.4610.1300.1170.0620.5051.4160.0050.0700.2040.4191.2260.0020.1360.1550.3011.2180.45µmTOC64027DOC.2,+(),MW30kDaDOC99%,66%,33%;MW30k~10kDaDOC36%,45%,22%,31%;.MW10k~3kDaDOC3%,59%,94%,,,32%,;MW3k~1kDaDOC44%,11%,15%,21%;MW1kDaDOC18%,,13%.2.2AOCAOC:,AOC10~20µg/L;,AOC50~100µg/L[5].AOC,,,;,.AOC103µg/L,AOC116µg/L,99µg/L.,AOC99µg/L142µg/L,43.4%.,92µg/L,[6],AOC100µg/L.1mg/L,AOC144µg/L.,AOC,1mg/L,AOC56%,AOC,1.20mg/L,,.0.18mg/L.1AOCAOC-P17AOC-NOX,,AOCAOC-P17AOC-NOX.AOC(µg/L)020406080100120140160AOCAOC-P17AOC-NOXBAC1AOCFig.1RemovaleffectofAOCbyadvancedtreatmentAOC-P17,(),P17,,,,VanDerKooij[4]NOXP17AOC,AOC-NOXP17.AOC-P17AOC54%,AOC-NOXAOC46%.AOC-P17AOC41%,AOC-NOXAOC59%,AOC-P17AOC48%,AOC-NOXAOC52%.,AOC.,,5641AOC,AOC.,AOC-NOX.AOCMW1kDa.MW1kDaTOC53%,61%,63%,64%,67%.Lars[7]16%~38%,.2.3AOCNOM3,AOCTOC2.65%~5.91%,NOMMW1kDaTOC53%~67%,MW1kDaAOC.3AOCTOCTable3AOC/TOCratioinrawwaterMWTOC(mg/L)AOC(µg/L)AOCTOC(%)30kDa0.3770030k~10kDa0.2130010k~3kDa0.151003k~1kDa0.566152.651kDa1.488885.9185%AOCMW1kDa,,Collins[8]MW500Da.Owen[9]MW1k~5kDa.,MW1kDa18%,AOC,MW1kDaAOC.3NOMMW10kDa;1k~10kDa45%;MW1kDa18%,AOC.AOC.[1]AmyGL,KuoCJ,SierkaRA.Ozonationofhumicsubstanceseffectsonmolecularweightdistributionsoforganiccarbonandtrihalomethaneformationpotential[J].OzoneSci.Eng.,1988,10(1):3954.[2]ChadikPA,AmyGL.Coagulationandadsorptionofaquaticorganicmatterandhumicsubstances:ananalysisofsurrogateparametersforpredictingeffectsontrihalomethaneformationpotential[J].Environ.Tech.Letters.,1987,8:260266.[3]LiuW,WuH,WangZ,etal.Investigationofassimilableorganiccarbon(AOC)andbacterialregrowthindrinkingwaterdistributionsystem[J].WaterRes.,2002,36(4):891898.[4]vanderKooijD,VisserA,HijnenW.Determiningtheconcentrationofeasilyassimilableorganiccarbonindrinkingwater[J].J.Am.WaterWorksAssoc.,1982,74(10):540545.[5]LeChevallierMW,BabcockT,LeeRG.Examinationandcharacterizationofdistributionsystembiofilms[J].Appl.Environ.Microbiol.,1987,53:27142724.[6],,,.[J].,1999,15(9):79.[7]LarsJH,HarryE.Assimilableorganiccarboninmolecularweightfractionsofnaturalorganicmatter[J].WaterRes.,2001,35(4):11061110.[8]CollinsMR,AmyGL,SteelinkC.Molecularweightdistribution,carboxylicacidity,andhumicsubstancescontentofaquaticorganicmatter-Implicationsforremovalduringwatertreatment[J].Environ.Sci.Technol.,1986,20(10):10281032.[9]OwenDM,AmyGL,ChowdhuryZK,etal.NOM-characterizationandtreatability[J].J.Am.WaterWorksAssoc.,1995,87(1):4663.(1981),,,,.