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ID:39121629
大小:2.21 MB
页数:79页
时间:2019-06-25
《菲和壬基酚类物质在黄河兰州段水体颗粒物上的吸附行为分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、Topic:StudyonSorptionofPhenanthreneandnonylphenolspecialsOntheparticlesinLanzhouReachoftheYellowRiverAbstractSorptionoforganicpollutantsontoparticles(suspendedparticles,sediments,etc)innaturalwatersystemisanimportantprocess,whichaffectsthetransport,degradation,fateandecologicalriskoforganic
2、pollutantssignificantly.TheYellowRiverisoneofthelargestriverinourcountry,andalsoithasthehighestcontentofsuspendedparticlematter(SPM)intheworld.LanzhouReachbelongstoupperreachesoftheYellowRivenItisamostimportantreachforthehighlevelofpollutiondischarge.ThecontentofNOM(naturalorganicmatters)is
3、verylow.TherearefewstudiesaboutthesorptionoforganicpollutantsontheselowNOMlevelparticlesuntilnow.Inthisthesis,concentrationandspatialdistributionofpolycyclicaromatichydrocarbon(PAils),nonylphenolfNP),andnonylphenolpolyethoxylate(NPnEO)welx:investigatedinfieldstudyinLanzhouReachofYellowRiver
4、.Andalsosorptionofphenanthrene,NP,andNPnEOonnaturalparticlesanddifferentcompoundsoftheparticlesWaSstudiedinlaboratoryusingnaturalparticles,clay(illites,kaoline),andmetaloxidefartificialgoethite)aSsorhents.MechanismofsorptionWasanalyzedsubsequently.EffectsofpHvalue,pyrene,NP,andhumiaacidleve
5、lonthesorptionprocesswerealsostudied.Finally,desorptionofphenanthrenefromnaturalparticlesanditsinfluencingfactorswerealsostudied.Thefollowingwerethemainresults.PAHs,andNP/NPnEOwerewidelyexistedinallphaseofLanzhoureachoftheYellowRivenNaturalwaterparticlescartenrichthepollutantswithacertainex
6、tent(forPAHs:102_104,forNPnEO(n_O一3):102M03).ThereWaSself-purificationprocessexistingforthesepollutantsinthisreach.NPandNPnEO’SsorptionontheparticlesofLanzhoureachoftheYellowRiverhappenedquicklyinwater.ForNP,maximumsorptioncanbereachedin4hours,whileforNPnEO,amaximumSOrptionwasreachedat8hour
7、s,andthenadesorptionprocessinducedbybreakofmicellehappenedbeforethesorptionbalancewasachieved,Thedifferenceofsorptioncapabilityamongdifferentnaturalwaterparticleswasinconsistentwit}lthedifferenceoftheirNOMcontent.whichimpliedthatothercompoundsofthepartic
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