壳聚糖对钙镁离子的吸附性能  

The Adsorption of Calcium and Magnesium Ions by Chitosan

作　　者：孙启卓 关叶青 何紫阳 宇文泽琦 王阿兵 张大伟[1] SUN Qi-zhuo;GUAN Ye-qing;HE Zi-yang;YUWEN Ze-qi;WANG A-bing;ZHANG Da-wei(College of Polymer Materials and Engineering,Northeast Forestry University,Harbin 150040,China)

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《化学与粘合》2021年第3期175-178,227,共5页Chemistry and Adhesion

基　　金：中央高校基本科研业务费专项资金资助项目(编号:2572018BB10);黑龙江省大学生创新创业训练计划项目(编号:201810225376)。

摘　　要：水体软化是环境领域的重要研究内容,为了研究壳聚糖对其中Ca^(2+)、Mg^(2+)的吸附特性,模拟了海水环境中Ca^(2+)、Mg^(2+)的浓度。主要研究了吸附时间、吸附的p H值、壳聚糖用量、壳聚糖粒径等吸附动力学因素对Ca^(2+)、Mg^(2+)吸附量的影响,结果表明:Ca^(2+)、Mg^(2+)均在3h后达到吸附平衡,壳聚糖对Ca^(2+)的吸附容量大于对Mg^(2+)的吸附容量;吸附容量随p H值的变化呈先增大后减小的趋势,在p H值为7时达到极值;Ca^(2+)、Mg^(2+)吸附量随壳聚糖用量增多而增大,在壳聚糖用量分别为0.3g、0.2g时达到平衡;壳聚糖粒径与p H值相互作用体现壳聚糖吸附性,粒径减小,Ca^(2+)吸附容量减小、Mg^(2+)吸附容量增大。The water softening is an important research content in the field of environment.In order to study the adsorption characteristics of Ca^(2+) and Mg^(2+) by chitosan,the concentration of Ca^(2+) and Mg^(2+) in seawater is simulated.The effects of adsorption time,p H value,dosage of chitosan and particle size of chitosan on the adsorption capacity of Ca^(2+) and Mg^(2+) are studied.The results show that the Ca^(2+) and Mg^(2+) reaches adsorption equilibrium after 3h,and the adsorption capacity of chitosan for Ca^(2+) is greater than that for Mg^(2+).The adsorption capacity increases firstly and then decreases with the change of p H value,and reaches the maximum value when the p H value is 7.The adsorption capacity of Ca^(2+) and Mg^(2+) increases with the increase of chitosan dosage,and reaches equilibrium when the dosage of chitosan is 0.3g and 0.2g respectively;the interaction between the particle size of chitosan and p H value reflects the adsorption capacity of chitosan,and the adsorption capacity of Ca^(2+) and Mg^(2+) increases with the decrease of particle size.

关 键 词：壳聚糖 吸附 钙离子 镁离子 络合 

分 类 号：X703[环境科学与工程—环境工程]