HPMug2oMmNrOfxWQHLiEksa6s0hFu9Ox348d7QefarYlaFR5ArkhOwm3Da1pmxmxCtenj1+6luWD#r#n+EPn9L6Ce+9onqnMlT+i ›› 2019, Vol. 35 ›› Issue (1): 77-76.DOI: 10.3969/j.issn.1009-0479.2019.01.015
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ZHANGRunhua,NINGMencuia,LILib
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Abstract: Inthispaper,chitosanwith95% degreeofdeacetylationwasusedasrawmaterial,andthechitosanwasmodifiedbyacylationofsuccinicanhydrideandcrosslinkingofcalciumchloridetoprepareanacylatedchitosancrosslinkedmicrospherewithbetteradsorptionperformanceandbetterstability.TheadsorptionpropertiesofacylatedchitosancrosslinkedmicrospheresforCu2+ werealsoinvestigated.Theexperimentalresultsshowthattheacylatedchitosancrosslinkedmicrosphereshavegoodadsorptionpropertiesforcopperions.Theoptimalconditionsforadsorptionare:theadsorptiontimeofthemicrospherestocopperionsis60minandthepHis6.0.Duringtheadsorptionprocess,theΔGθvalueisbetween13.58kJ·mol-1and11.28kJ·mol-1,ΔHθ=11.61kJ·mol-1,ΔS=76.82J·K-1·mol-1,indicatingthattheacylatedchitosanmicroCu2+ adsorptioninballadsorptionwaterisaspontaneousendothermicandentropicprocess.
Key words: cross-linkedacylatedchitosanmicrospheres, adsorption, Cu2+ ions, thermodynamicparameter
CLC Number:
O636.1
ZHANGRunhu, NINGMencui, LILi. AdsorptionofCu2+ onCross-linkedAcylatedChitosanMicrospheres[J]. HPMug2oMmNrOfxWQHLiEksa6s0hFu9Ox348d7QefarYlaFR5ArkhOwm3Da1pmxmxCtenj1+6luWD#r#n+EPn9L6Ce+9onqnMlT+i, 2019, 35(1): 77-76.
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URL: http://kmyzxb.magtech.com.cn/EN/10.3969/j.issn.1009-0479.2019.01.015
http://kmyzxb.magtech.com.cn/EN/Y2019/V35/I1/77