作　　者： ; ; ;

机构地区： 中山大学化学与化学工程学院材料科学研究所

出　　处： 《离子交换与吸附》 2005年第5期452-460,共9页

摘　　要： 研究了甲醛、环氧氯丙烷交联壳聚糖(AECTS)对Co2+的吸附热力学行为,用FTIR、WXRD对吸附产物进行了结构表征,并研究了溶液中介质种类的不同对Co2+吸附量的影响。结果表明:AECTS主要以配位吸附和物理吸附形式吸附Co2+;树脂与Co2+配位后,结晶度下降;AECTS对Co2+的吸附行为同时符合Freundlich模型和Langmuir模型;吸附为自发的、放热的熵减小过程;不同介质对树脂吸附Co2+的影响大小顺序为HCl>CdCl2>MgCl2>NaCl,前两者使吸附量减小,后两者使吸附量增加,作用机理相差较大。 In this paper the adsorption thermodynamics properties of new type chitosan crosslinked by aldehyde and epichlorohydrin AECTS with Co^2＋ were investigated. The structure of adsorption products was characterized by Fourier transforms IR and WXRD. The influence of different media on adsorption was studied. The results show that AECTS adsorbed Co^2＋ mainly by complication and physical style, the experimental data fit well into the Langmuir and Freundlich adsorption isotherm at the same time. The adsorption is a spontaneous exothermic process of decreased entropy. Compared to AECTS, the structure and properties of AECTS-Co had changed： the crystalline grade being reduced. The effect order of media is HCl〉CdCl2〉MgCl2〉NaCl, HCl and CdCl2 make the adsorption quantium of AECTS decrease and MgCl2 and NaCl make the adsorption quantium of AECTS increase, their effect mechanism was different greatly.

关 键 词： 交联壳聚糖 吸附机理 介质

领　　域： [理学] [理学]