铁硅交联膨润土对Cr^(6+)的吸附研究

Studies on Fe-Si Cross-linked Bentonite Adsorbing Cr^(6+) in Imitated Wastewater

以钠基膨润土为原料制备铁 硅交联膨润土,吸附处理模拟废水中的Cr6+,探讨了吸附条件.结果表明:铁 硅交联膨润土对质量浓度为30mg/LCr6+溶液的最佳吸附条件为:pH=11,吸附剂用量8g/L,常温吸附15min,Cr6+去除率达87.55%.其吸附行为符合Freundlich方程.

The bentonite modified by Fe-Si is synthesized and used to adsorb Cr^(6+) in imitated wastewater. The optimum adsorption conditions are pH=11,the amount of adsorbent 8 g/L, stirring 15 min .The removal rate of Cr^(6+) is 87.55 %.The adsorption isotherm of Fe-Si cross-linked bentonite is studied. It is found that the Freundlich equation is suitable for Fe-Si cross-linked bentonite sorbents.