壳聚糖包覆纤维素的合成及对Au(Ⅲ)的吸附研究  

Study on Synthesis of Chitosan Coated Cellulose to the Adsorption Properties for Au^(3+)

作　　者：张国远[1,2] 崔成刚 王明华[1] 张盈[1] 崔亨利[1] 

机构地区：[1]鲁东大学化学与材料科学学院,山东烟台264025 [2]安丘市第二中学,山东潍坊262100

出　　处：《广州化工》2012年第6期73-76,共4页GuangZhou Chemical Industry

摘　　要：合成了壳聚糖包覆纤维素(CHCC)吸附剂,其结构经FTIR、元素分析进行表征。研究了对Au3+的吸附包括pH的影响、吸附动力学、吸附选择性和吸附热力学。结果表明:吸附容量受pH影响较大;液膜扩散是吸附的主控制步骤,pH=3时优先选择吸附Au3+;吸附热力学符合Freundlich模型。-NH2、-OH参与对Au3+的吸附,树脂中的-CHO可能被Au3+氧化。A kind of adsorbent for metal ions,cotton fiber coated by high loading of chitosan（CHCC） was prepared.Its structure was characterized by transform infrared spectrum（FTIR） and elemental analysis.The adsorption properties of CHCC for Au3＋,such as effect of pH,kinetics,adsorption selectivity and isotherm adsorption were investigated.The results showed that the adsorption for Au3＋ was strongly dependent on the pH.The resin had good adsorption selectivity for Au3＋ at pH 3.0.The dynamics results showed the adsorption for Au3＋ was controlled by liquid film diffusion.The adsorption process could be described with Freundlich equation.The adsorption mechanism of resin for Au3＋ was that amino groups and hydroxyl groups were main donors to adsorb Au3＋.Aldehyde group in CHCC might be oxidized by Au3＋.

关 键 词：壳聚糖包覆纤维素 金离子 吸附 吸附机理 

分 类 号：O631.1[理学—高分子化学]