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ID:28713371
大小:7.45 MB
页数:125页
时间:2018-12-13
《壳聚糖—无机絮凝剂复合絮凝去除水源水中有机物与铝离子的研究》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、ResearshonremovaIoforganiCmatterandaIuminurnbythecombinedfIOCCUlationofchitosan—inorganiCcoaguIantinsourcewaterAbstract:ThecurrentSourcewaterqualityisverypoorinmycountry,andthattheorganicmatteristheprimarypollutioninit.Firstlythepartialorganicmatteritselfhasacut
2、eorc11romc,directorindirectbadeffecttohumanbeing;mostimportantofall,theorganicmatteristheprecursortodisinfectionby~product(DBP)formation.Consideringthatchlorinationwillcontinuetobethemostcommondisinfectionprocess,enhancedremovalofDBPprecursorsinsourcewaterrepres
3、entsavaluablewayforreducingthepotentialforchlorinatedby—productsformation.Accordingtothisconceptalotoftechniquesarebroughtforward,theflocculationisoneofverycommonandeconomicaltechniques,andtheflocculantisthekeyofthistechniqueOfalltheavailablecoagulantsindrinking
4、watertreatment,thealuminumsaltcoagulantsareusedmostwidely.ButiftheorganicmatterremovalisneededinSO。Urcewater,over-useofaluminumsaltcoagulantsisabsolutelynecessarily.Itwillelevates’theresidualaluminumconcentrationindrinkingwater,producemoresludgeinwaterworks,anda
5、seriesofproblemelse.Thesearchforabetter,saferalternativewayhasbecomeanimportantareaofstudy.Inthisstudy,thenaturalmacromoleculecoagulant——一chitosan,itflocculantbehaviorswerestudiedfirstly,andthenthecombinedflocculationofchitosanflocculantandinorganicflocculantwas
6、tested.inaddition,usingchitosanandcombinedflocculation,theeffectofremovingresidualaluminuminthetreatedwaterwitllwasstudiedrespectively.Thetestresultsshow:(1)TowardtheriverZhengShuiwaterinHengYang,chitosanexpressedthefavorableflocculantbehaviors.Andtherequireddos
7、ageofchitosanislittle,theresultingflociscompact,anditssettingvelocityisveryfast.TheoptimalpHforflocculationofchitosanisbetween6and7.5,andthemolecularweightofchitosanhaslittleeffecttothechitosanflocculantbehaviors.Buttheeffectofremovingturbidityandorganicmatterin
8、sourcewaterusingchitosanisnotconsistentTheeffectofVariationofmrbidityinpourwatertochitosanvlIlflocculantbehaviorsisverylittle,butalongwiththeconcentrationoforganicmat
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