吸附剂浓度效应下蒙脱石对Cu^(2+)的吸附特性

Adsorption Characteristic of Cu^(2+) onto Montmorillonite under Adsorbent Effect

该文介绍了吸附剂浓度效应对重金属Cu2+在蒙脱石上吸附特性的影响,通过平衡吸附试验对传统吸附等温式及多种吸附剂浓度效应模型进行了验证。结果表明:吸附量qe随吸附剂浓度CS增大而降低;在传统等温吸附模型中,Langmuir模型最适于描述Cu2+在蒙脱石上的吸附规律,但无法解释吸附剂浓度效应,由模型参数判断该吸附过程以离子交换为主,反应极易进行且几乎不可逆;三种吸附剂浓度效应模型中,Langmuir-SCA模型具有良好的适用性,吸附剂浓度效应的产生与粒子间絮凝作用有关。

Adsorption characteristics of Cu^2＋ onto montmorillonite under the influence of sorbent effect were introduced in the paper. Some isothermal adsorption experiments were conducted, and the data was used to verify the applicabilities of traditional adsorption isotherms and several kinds of sorbent effect models. As resuhs indicate, adsorption density qe will decrease as the sorbent concentration increases. Among traditional adsorption isotherms, Langmuir equation is the most suitable model for describing the adsorption of CuE＋ onto montmorillonite, which isn＇t able to describe the adsorbent effect. According to model parameters, the adsorption is mainly an ion exchange process and is very easy to carry on. Among the four adsorbent effect models, Langmuir - SCA equation has a good applicability. It is also convinced that emerging of sorbent effect is connected with the particle flocculation.