摘要
文章研究了天然斜发沸石对锌离子的去除效果,及其改型和吸附条件的影响。研究了初始浓度和流速对吸附的影响,以及温度对洗脱的影响。通过实验测定铵型斜发沸石对锌离子的平均交换容量为29.94 mmol/100 g沸石。用Langmuir吸附等温方程拟合了吸附等温数据,结果表明其具有很好的拟合精度。依据热力学平衡原理,计算出该过程的热力学参数,如焓、吉布斯自由能和熵变。研究表明铵型斜发沸石吸附锌离子的过程为自发的吸热反应,高温有利于铵型斜发沸石对锌离子的吸附。
In this paper, the effects of removing of zinc ions by the clinoptilolite were stud- ied, including the influences of the modification methods of natural clinoptilolite and the adsorption conditions. The effects of initial concentrations and velocities on exchange capacity of the clinoptilo- lite were studied. The elution at different temperatures was also investigated. The maximum ion ex- change capacity of Ammonium - saturated clinoptilolite for zinc ion was found 29.94 mmol/100 g zeolite. Equilibrium sorption data were analyzed by using Langmuir. It was showed that Langmuir adsorption isotherm has good description of Ammonium - saturated clinoptilolite adsorbing zinc ion. According to the thermodynamic equilibrium principle, the thermodynamics parameters such as en- thalpy, Gibbs free energy and entropy changes were also calculated. Thermodynamic investigation indicated that the process of Ammonium - saturated clinoptilolite adsorbing zinc ion was a spontane- ous endothermic reaction, and high temperature would be beneficial to the adsorption reaction.
出处
《盐业与化工》
CAS
2013年第12期21-25,共5页
Jounral of Salt and Chemical Industry
关键词
铵型斜发沸石
离子交换
锌离子
吸附
脱除
ammonium - saturated clinoptilolite
ion exchange
zinc ion
absorption
removal
作者简介
谢英惠（1958--），男，天津人，教授，主要研究方向为精细无机产品合成与应用。联系方式：13820220469
