复配壳聚糖对废水中Cu~(2+)的动态吸附研究

将壳聚糖与活性炭复配,并进行交联和接枝改性,制得复配壳聚糖吸附剂,并用于动态吸附废水中的Cu~(2+),通过穿透曲线考察了主要操作条件对吸附性能的影响。结果表明,增大溶液初始浓度及溶液流量,吸附剂的穿透吸附量增加,穿透时间减少,穿透曲线前移;增加吸附剂填充量,穿透吸附量及穿透时间增加,穿透曲线更加平缓。采用Thomas模型对实验数据进行拟合分析,结果表明,复配壳聚糖对Cu~(2+)的动态吸附行为符合Thomas模型。

Study on Dynamic Adsorption of Cu2+ in Waste Water by Compounded Chitosan

In this paper,the compounded chitosan adsorbent was prepared by compounding the chitosan with activated carbon,and then crosslinking and graft modifying the compounded chitosan,which was used for dynamic adsorbing the Cu2 + in waste water;also,influences of main operating conditions on the adsorbing performance were investigated through penetration curve.Results showed that penetration absorbing quantity of the absorbent would increase with the increasing of initial concentration and flow of the solution,and the penetration curve would move forward with the penetration time reducing;when the absorbing dosage increased,the penetration absorbing quantity and penetration time would increase,and the penetration curve became more smooth.Through experimental data fitting analysis by Thomas model,it was showed that dynamic adsorption behavior of the compounded chitosan for Cu2+ was in accord with the Thomas model.