殼聚糖絮凝劑制備工藝改進及其絮凝性能研究.pdf

1、大連理工大學(xué)碩士學(xué)位論文殼聚糖絮凝劑制備工藝改進及其絮凝性能研究姓名：邢佶勇申請學(xué)位級別：碩士專業(yè)：環(huán)境工程指導(dǎo)教師：張愛麗20050601殼聚糖絮凝劑制各工藝改進及其絮凝性能研究AbstractChitosanisoneofthenaturalpolysaccharideflocculantsAdvantagesofChitosan，suchasharmless，livingcompatibilitiesandmulti—functi

2、on，madeitpromisinginapplicationTherefore，researchworkscarriedoutonchitosanhavebecomepopularrecentlyThispaperdevelopsanewmethodofthepreparationofchitosaninwhichdeacetylationofchitinunderimmersedstaticconditionsisevaluated

3、andtheproducecraftofChitosanismodifiedaswellThispaperalsostrengthensitsstabilityofmeasuredvaluebyimprovingthemeasurementofchitosanmassweightFurthermore，researchonhowdifferentfactorsinfluencedtheflocculantcapabilitiesofch

4、itosanwillbeprovidedThekeyfindingsofthispaperinclude：①Deacetylationofchitinunderimmersed—staticconditions(solids／solventratio(v／v)=1：1；noagitating；with70％NaOH；118Cfor4h)isevaluatedforthepreparationofchitosanTheresultsind

5、icatethatthisapproachcanreducethedosageoftheexhaustedalkalineapproximately70％Treatedchitosanshowssimilardegreeofdeacetylation(783％)，butsignificantlyhighermolecularmass(6x105)comparedwiththoseofthecommercialchitosanCompar

6、ingwiththetraditionalcraft，thismethoddoesnotneedthemachineagitation，reducestheproductioncostandhasabettersocialperformance②Thisresearchdiscoversthatdifferentmassweightsareacquiredfromdifferentoriginaldensityofchitosansol

7、utionHowever，withintherangeof0059／50mLO29／50mLtheresultmeasuredofmolecularweightisstableAquadensityisoverlowifitislowerthanO059／50mLandthelinebehaviorisnotgoodIfitishigherthanO29／50mLthetrendofdescentistOOsharptomeasuret

8、hemolecularweight⑧SeriouspollutioncomeswiththeproductionofchitosannormallyandthecurrentpollutiontreatmentmethodsarenotperfectThispaperprovidesasuperiormethodtotreatthewastewaterItcostsverylittletoacquiretheproteinandcalc