化工环保2013，Vol.33Issue(1)：6-9,4.
天然膨润土还原吸附Cr(Ⅵ)
Reduction Adsorption of Cr(Ⅵ) on Natural Bentonite
罗平 1田英1
作者信息
- 1. 南京工业大学环境学院,江苏南京210009
- 折叠
摘要
Abstract
Natural bentonite was used as adsorbent in the reduction adsorption treatment of simulated Cr(Ⅵ)-containing wastewater.The experimental results show that:When (NH4)2FeSO4 is used as reducing agent,the adsorption effect is the best; When the dosage of reducing agent is 0.8 time of the theoretical value,the dosage of bentonite is 6 g/L,the adsorption time is 30 min,the adsorption temperature is 30 ℃ and the initial Cr(Ⅵ) mass concentration is 1 mg/L,the Cr(Ⅵ) removal rate can reach 99.6％ and the total Cr mass concentration of the treated wastewater can be as low as 0.003 mg/L.The reduction adsorption of Cr(Ⅵ) on natural bentonite accords with pseudo-second-order kinetic model and Freundlich isothermal adsorption model.关键词
天然膨润土/铬/还原/吸附/废水处理Key words
natural bentonite/ chromium/ reduction/ adsorption/ wastewater treatment分类
资源环境引用本文复制引用
罗平,田英..天然膨润土还原吸附Cr(Ⅵ)[J].化工环保,2013,33(1):6-9,4.
