双变性淀粉吸附水溶液中铜离子的热力学和动力学研究  

STUDY ON THERMODYNAMICS AND KINETICS OF COPPER(II) ADSORBED BY THE DUAL MODIFIED STARCH IN AQUEOUS SOLUTION

作　　者：李伟[1] 张玉军[1] 胡静波[1] 

机构地区：[1]河南工业大学化学化工学院,河南郑州450052

出　　处：《河南工业大学学报（自然科学版）》2008年第2期51-54,共4页Journal of Henan University of Technology：Natural Science Edition

基　　金：河南省科技攻关项目(0324290039)

摘　　要：以自制的双变性淀粉为吸附剂,吸附水溶液中的铜离子,考察了温度、pH值、吸附时间、起始铜离子浓度对吸附性能的影响.结果显示,该吸附体系的温度为30℃,pH值为6,吸附平衡时间为60 m in,不同起始浓度条件下的吸附率均在96.97%以上.通过研究显示,该吸附体系动力学服从一级可逆动力学方程,热力学是一个自发的放热反应过程.the dual modified starch was utilized as an adsorbent for the removal of Cu（Ⅱ） ions from aqueous solution. Adsorption experiment was conducted under various conditions, i. e. , initial concentration, temperature, and pH. The results showed that the maximum percentage removal of Cu （Ⅱ） ions was more than 96.97% as the adsorption system conditions were temperature, 30 ℃, pH 6, the equilibrium time of adsorption, 60 min. Adsorption kinetics of Cu（Ⅱ） were consistent with the equation of first-order reversible kinetics. Thermodynamic research showed that adsorption process is spontaneous exothermic reaction.

关 键 词：双变性淀粉 铜离子 吸附动力学 吸附热力学 

分 类 号：TS201.2[轻工技术与工程—食品科学]