摘要
采用吸附动力学方法,探讨了赤铁矿(a-Fe2O3)对重金属Cr(Ⅲ)的吸附动力学特征.研究结果表明,赤铁矿对Cr(Ⅲ)的吸附动力学特征可以采用松弛动力学方程很好地加以描述,吸附反应表现为初始快反应和随后的慢反应两个阶段,控速步骤是Cr(Ⅲ)在赤铁矿表面水膜和毛细孔的扩散作用.
Characteristics of the adsorption dynamics of Cr(Ⅲ) ion on hematite (a-Fe2O3) surface were studied by the adsorption dynamics method. The results showed that the adsorption dynamics of Cr(Ⅲ) adsorption on the hematite surface could well be described by a relaxation dynamic equation. The adsorption reaction could be divided into two processes, a fast reaction stage and a slow reaction stage, and the process of Cr(Ⅲ) diffusion on hematite surface water velum and capillary was shown to be the control step.
出处
《西南大学学报(自然科学版)》
CAS
CSCD
北大核心
2010年第3期50-53,共4页
Journal of Southwest University(Natural Science Edition)
基金
国家自然科学基金资助项目(40971147)
国家科技支撑计划资助项目(2007BAD87B10)
重庆市自然科学基金资助项目(CSTC
2008BB7099)
西南大学生态重点学科"211工程"经费资助项目