期刊论文

中文

环境化学

0254-6108

2009

28

1

62-67

10.3321/j.issn:0254-6108.2009.01.013

(2005-02):引进国际先进农业科技计划(948计划) (湘教发2003-101):湖南省教育厅产业化推广项目

本校为第一机构

对四种液/固相单一离子吸附体系的动力学研究结果表明:吸附速率不仅随时间变化,也与起始离子浓度(C0)和吸附剂浓度(W0)有关;Lagergren准二级方程在给定的起始离子浓度及吸附剂浓度下具有很高的模拟精确度,但其参数随起始离子浓度和吸附剂浓度的变化而变化,且无法确定其间的函数关系;结合四组分离子吸附模型,提出了新的动力学方程,实验结果表明,新方程具有较高的模拟精确度,其参数与C0和W0具有相对稳定的函数关系,可作为液/同相单一离子吸附体系中给定C0,W0条件下吸附动力学过程的预测模型.

Kinetic experiments were carried out to test the basic relationship for ion adsorption in liquid/solid single ionic species systems for Zn^2＋ , Cd^2＋ , Cu^2＋ and Cr（Ⅵ）, respectively. The obtained results showed that ion adsorption rate depended not only on contacting time but also on initial ion concentration （C0） and adsorbent concentration （W0） . Classic kinetic equations were found to fit the experimental data well at given C0 and W0, but their parameters varied with C0 and W0 at highly significant levels. Based on a four adsorptio...