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1、第22卷第8期化學(xué)研究與應(yīng)用Vo1.22,No.82010年8月ChemicalResearchandApp]icationAug.,2010文章編號:1004—1656(2010)08—1082-06大孔PNaA樹脂對黃連素的吸附性能研究肖谷清,龍立平,王姣亮,陳莉(1.湖南城市學(xué)院化學(xué)與環(huán)境工程系湖南益陽413000;2.湖南師范大學(xué)化學(xué)化工學(xué)院湖南長沙410081)摘要:將大孔D151樹脂(聚丙烯酸樹脂)用NaOH淋洗轉(zhuǎn)化為大孔PNaA樹脂(聚丙烯酸鈉樹脂),研究大孔PNaA樹脂對黃連素的吸附性能。測定了PN
2、aA樹脂的持水量、弱堿交換量;比較PNaA樹脂和X-5樹脂、H103樹脂、AB-8樹脂、XAD-4樹脂等吸附樹脂對黃連素吸附量的大小;測定了PNaA樹脂對黃連素在不同溫度下的吸附等溫線,利用熱力學(xué)函數(shù)關(guān)系計(jì)算出了吸附焓、自由能和熵;測定了PNaA樹脂對黃連素的吸附動力學(xué);測定了PNaA樹脂上黃連素在不同溶劑中的靜態(tài)解吸率。實(shí)驗(yàn)表明:PNaA樹脂對黃連素的吸附量明顯大于X-5樹脂、H103樹脂、AB一8樹脂、XAD-4樹脂等吸附樹脂對黃連素的吸附量;PNaA樹脂對黃連素的吸附為放熱、自發(fā)的過程;PNaA樹脂對黃連素的
3、吸附動力學(xué)數(shù)據(jù)符合一級吸附速率方程,顆粒內(nèi)擴(kuò)散是吸附速率的主要控制步驟,吸附動力學(xué)可采用HSDM模型加以描述;PNaA樹脂上黃連素在0.1%NaC1和80%乙醇的混合溶液中靜態(tài)解吸率為93.43%,解吸效果好。關(guān)鍵詞:PNaA樹脂;黃連素;吸附熱力學(xué);吸附動力學(xué)中圖分類號:0632.52文獻(xiàn)標(biāo)識碼:AStudyontheadsorptionperformancesforberberineontothemacroporousPNaAresinXIAOGu-qing‘一,LONGLi—ping,WANGJiao.1ia
4、ng,CHENli(1.CollegeofChemistryandEnvironmentalEngineering,HunanCityUniversity,Yiyang413000,China;2.CollegeofChemistryandChemicalEngineering,HunanNormalUniversity,Changsha410081,China)Abstract:Theobjectiveofthisworkwastostudytheadsorptionperformancesforberberin
5、eontothePNaAresin.ThemacroporousD一151resin(polyacrylicacidresin)WaSchangedintothemacroporousPNaAresin(polysodiumacrylateresin)byleachingwithNaOH.ThewaterretentioncapacityandtheweakbaseexchangeeapaeityeofthePNaAresinweremeasured.Theadsorptionqualityofberberineo
6、ntothePNaAresin,X-5resin,H103resin,AB一8resinandXAD-4resinwascompared.Theadsorptionisothermsofberberineatdiferenttemperatureswerestudied.Isothermaladsorptionenthalpy,Gibbsfreeenergyandentropywerecalculatedaccordingtothermodynamicequations.Theadsorptionkineticof
7、berberlneontothePNaAresinwasmeasured.ThestaticelutionratioofberberineontothePNaAresinwithdifferentelutionsolventwasmeasured.TheresultsshowedthattheadsorptionqualityofberberineontothePNaAresinwassuperiortoX-5resin,H103resin,AB一8resinandXAD-4resin.Heatwasdischar
8、gedduringtheadsorptionandtheadsorptionoccu~edautomatically.Theadsorptionkineticdateofberberinefittedtothefirstorderrateequation.Theintraparticaldiffusionofberberinewasthemainrate—c