有机物对UF膜过滤通量的影响_董秉直

第27卷第5期2007年5月环境科学学报ActaScientiaeCircumstantiaeVo.l27,No.5May,2007基金项目:国家“863”高技术研究发展计划资助项目(No.2002AA601130);国家科技攻关计划重大资助项目(No.2003BA808A17)SupportedbytheHi-techresearchandDevelopmentProgramofChina(No.2002AA601130)andNationalScienceandTechnologyResearchProject(No.2003BA808A17)作者简介:董秉直(1955—),男,教授,E-mail:dongbingzhi@online.sh.cn;*通讯作者(责任作者)Biography:DongBingzhi(1955—),male,professor,E-mail:dongbingzhi@online.sh.cn;*Correspondingauthor董秉直,冯晶.2007.有机物对UF膜过滤通量的影响[J].环境科学学报,27(5):758-762DongBZ,FengJ.2007.TheeffectoforganicmatteronUltra-Filtrationmembranefiltrationflux[J].ActaScientiaeCircumstantiae,27(5):758-762有机物对UF膜过滤通量的影响董秉直1,*,冯晶21.同济大学长江水环境教育部重点实验室,上海2000922.同济大学环境科学与工程学院,上海200092收稿日期:2006-06-14修回日期:2007-01-12录用日期:2007-03-07摘要:采用截留分子量为30000的聚醚砜超滤膜进行膜过滤试验,研究有机物的特性,如亲疏水性以及相对分子质量对超滤膜通量的影响.试验结果表明,过滤亲水性组分时膜通量明显高于过滤疏水性组分.对2种不同水源的试验表明,尽管有机物含量相同,但由于亲疏水性的比例不同,造成的膜通量下降不同.疏水性越大的原水,其膜通量下降也越大.因此,疏水性组分是造成通量下降的主要因素.试验还表明,相对分子质量较大的有机物并非通量下降的主要因素,有机物的分散性可能是影响通量的主要因素.关键词:饮用水处理;亲疏水性;相对分子质量分布;通量文章编号:0253-2468(2007)05-0758-05中图分类号:X703.1文献标识码:ATheeffectoforganicmatteronUltra-FiltrationmembranefiltrationfluxDONGBingzhi1,*,FENGJing21.KeyLaboratoryofYangtzeRiverWaterEnvironmentoftheMinistryofEducation,TongjiUniversity,Shanghai2000922.SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092Received14June2006;receivedinrevisedform12January2007;accepted7March2007Abstract:Filtrationexperimentswereperformedusingapolyethersulfone(PES)ultra-filtration(UF)membranewith30,000molecularweightcut-offs(MWCO)todeterminetheeffectoforganicmatteronfluxintermsofhydrophilicity/hydrophobicityanddistributionofmolecularweight(MW).Thefiltrationfluxforthehydrophilicfractionwashigherthanthatforthehydrophobicfraction.Theexperimentalresultsfortwodifferentwatersourcesshowthat,althoughtheconcentrationoforganicswasthesame,thefluxwasdifferent,whichcanbeattributedtodifferencesintheratioofhydrophilicityandhydrophobicity.Themorehydrophobicthefractionwas,themorethefluxdecreased.Theresultalsodemonstratestha