PAN膜超濾凈水試驗研究.pdf

1、學校代號!Q532一分類號TIJ99⑨學號SQ2Q1Q豎密級——瀚確火多HUNANUNIVERSITY碩士學位論文PAN膜超濾凈水試驗研究學位申請人姓名培養(yǎng)單位導師姓名及職稱學科專業(yè)文衛(wèi)土木工程學院柯水洲副教授市政工程研究方向給坐絲堡堡墜量墊查論文提交日期!!!!生!旦旦PAN膜超濾凈水試驗研究AbstractInordertodiscovertheremovalofmicropollutantinthewatersourcebyUFm

2、embraneprocessandofferreferentialinformationtothedevelopmentofintegrativedrinkingwatertreatmentequipmentsThispapermainlystudiedthecharacteristicsofultrafiltrationforthetapwater、waterofXiangriverandcrudehumicacidbymeansof

3、hydrophilicmodifiedPANhollowfiberultrafiltrationmembranefiltersandanalyzedtheremovaleffectcontrastedUFitselfwithaddingturbidityandcoagulationpretreatmentUFUFexperimentsforturbidityandcommercialhurnicacidwerealsocarriedou

4、ttoexaminethefluxdeclinecausingbymembranefoulingTheprincipleofUFfluxdeclinewaspreliminarilydiscussedTheresultsshowthatUFisefficientfortheremovalofbacteriaandturbiditywiththe99％removalofbacteriaachievedandresidualturbidit

5、ywithinO05NTUinthetreatedwater；ThereisnoobviousremovalofPH，F(xiàn)e，Mn，RigidityandnormalremovalasfororganicsubstanceinthewaterbyUFWhile，addingturbidityoraluminumcoagulationpretreatmentenhancestheUFremovaloforganicsubstanceTheb

6、iggertheNTUis，thehighertheremovalbyUFisAtPH27themechanismofcoagulationisadsorptionorbridgingoforganicsubstanceontheamorphoussolid—phase[AI(OH)3]n，while，atPH25；themechanismischargeneutralizationIntermsoftheremovaloforgani

7、csubstance(CODMn，UV254)，theeffectofcoagulationpretreatmentUFunderPH=7turnsouttobemuchbetterthanthatundertheconditionofPH=5becausethattheflocculatingconstituentatPH27iseasilyrejectwithlooserinshapeandbiggerinsizethanthose

8、atPH25，theabilityofrejectenhancesespeciallyforthe73％removalofUV254(HA)，66％removalofUV2s4(waterofXiangriver、ResultsindicatespretreatmentUFcanrejectTHMsmoreefficientlyofferingbettersafeguardstodrinkingwater；Thedeclineofthe

9、membranefluxismainlyattributedtothecakelayerformation，butheHAcakelayerleadstomuchworsemembranefluxdeclinethanturbiditycakelayerdoesIfUFisjustrejectturbiditythefiltercakeformslowlyandthefoulingbymembraneporeblockingalsois

10、poorbut，fortheremovalofmacromolecularorganicsubstance，thepermeatefluxdeclineisresultedmainlybymembraneporeblockinginthebeginning，whileinthefinalperiodmainlybycakeformationInthecaseofexclusionoforganicsubstance，thepresenc