滤后水中NOM经臭氧氧化产生的小分子醛_酮和酮酸_鲁金凤

滤后水中NOM经臭氧氧化产生的小分子醛、酮和酮酸鲁金凤,张涛,马军＊,陈忠林,王群,沈吉敏(哈尔滨工业大学市政环境工程学院,哈尔滨150090)摘要:以富集、分离得到的滤后水中6种不同特性的天然有机物(NOM)为对象,测定了臭氧氧化NOM各组分后小分子醛、酮及酮酸的生成情况.NOM各组分臭氧氧化后甲醛和丙酮酸产量最大,特别是憎水中性物质(HON)的甲醛产率是其醛、酮总产率的70.58%,单位DOC丙酮酸的产率达103.2μgmg;憎水性NOM组分的小分子醛、酮、酮酸产率比亲水性组分的高,特别是憎水中性物质(HON)和憎水酸(HOA)的小分子醛、酮及酮酸类总产率最高,二者之和分别占NOM各组分的醛酮总产率及酮酸总产率的55.56%和60%;NOM碱性组分的醛、酮、酮酸产量最低.用小分子醛、酮、酮酸总量折算DOC占氧化后NOM的DOC的百分比作为衡量氧化后各组分可生物降解性的参考,则臭氧氧化后HON和HOA的可生物降解性比其他组分高得多.关键词:NOM组分;臭氧;醛;酮;酮酸;可生化性中图分类号:X703.1文献标识码:A文章编号:0250-3301(2007)06-1268-06收稿日期:2006-06-04;修订日期:2006-08-12基金项目:国家自然科学基金项目(50578051)作者简介:鲁金凤(1980～),女,博士研究生,主要研究方向为给水深度处理技术.＊通讯联系人,E-mail:majun@hit.edu.cnAldehydes,Ketones,andKetoacidsProducedDuringOzonationofNOMFractionsIsolatedfromFiltratedWaterLUJin-feng,ZHANGTao,MAJun,CHENZhong-lin,WANGQun,SHENJi-min(SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China)Abstract:Naturalorganicmatter(NOM)inthefiltratedsurfacewaterfromawatertreatmentplantwasisolatedandfractionatedintosixtypesoffractions.Thesefractionswereozonatedattypicalozonedoseandreactiontime.Theyieldsofseveralsmallmolecularozonationby-products,suchas,aldehydes,ketonesandketoacids,weremonitoredafterozonationoftheindividualNOMfractions.Theresultsshowedthatformaldehydeandpyruvicacidhadthemaximalyieldsamongthealdehydesandketoacids,respectively.Hydrophobicneutral(HON)producedthemostsignificantyieldoftheozonationby-productswiththespecificyieldofformaldehydeupto70.58%ofthespecificyieldsandpyruvicacidbeing103.2μgmg.ThehydrophobicNOMfractionsproducedhigheryieldsoftheseby-productsthanthehydrophilicfractions.Forexample,HONandhydrophobicacid(HOA)producedmuchhigheryieldsoftheozonationby-productsthanotherfractions.AldehydesandketonesfromHONandHOAandketoacidsfromthetwofractionsaccountedfor55.56%and60%oftheozonationby-productsfromalltheNOM,respectively.Lowerproductionoftheseby-productswasalsoobservedforthebasicfractionscomparedtotheacidicandneutralones.HONandHOAweremorebiodegradableafterozonation,becausetheirozonationby-productsc