摘要：

研究了改性壳聚糖对重金属Hg²⁺的吸附特性,包括吸附动力学和吸附等温式,且研究了pH、反应时间对其吸附性能的影响.结果表明:羧乙基壳聚糖对Hg²⁺的吸附在不同温度下符合Freundlich和Langmuir吸附等温式,吸附过程动力学适合二级反应.当pH为4～6,吸附时间为180min时,羧乙基壳聚糖对Hg²⁺有较高吸附效果.

关键词: 氯丙酸, 壳聚糖, 吸附等温式, 吸附动力学

Abstract:

The adsorption behavior of Hg²⁺by modification chitosans has been investigated.It includes the adsorption kinetics as well as adsorption isotherm.The factors that might affect the adsorption behavior such as pH and reaction time have also been investigated. By means of analyzing the fitting of experimental data， utilizing the related mathematic mode，the results show that thermodynamic data of carboxyethyl-chitosan adsorption Hg²⁺fit the Freundlich and Langmuir adsorption isotherms at different temperatures. The adsorption process kinetic is suitable for the second-order reaction.When its pH is 4-6 and adsorption time 180 min，the adsorption behavior of Hg²⁺ by carboxyethyl-chitosan is better

Key words: chloropropionic acid, chitosan, adsorption isotherm, adsorption kinetics

中图分类号: 

• X703.1