壳聚糖衍生物对重金属离子的吸附性能

Adsorptivity of Chitosan Derivation for Heavy Metal Ions

研究了具有线性硫脲基和羧基双官能团的改性交联壳聚糖颗粒树脂 (CNCTS)对Cu2 + 、Ni2 + 和Co2 + 的吸附特性及机理 .结果表明 ,该化合物对Cu2 + 的吸附量为 2 4 0mmol/ g ,Ni2 + 为 1 6 0mmol/ g和Co2 + 为 3 10mmol/ g .它们的差异可能与离子的构型和络合体的配位相关 .在 3种离子混合溶液选择性吸附中 ,对 3种离子的吸附性与对单种离子的吸附性是一致的 ,该化合物对Co2 + 具有优良的选择吸附性 .经用 0 1mol/L的盐酸洗脱再生 3次后 。

The adsorption characteristics and mechanism of the bifunctional grafted cross-linked chitosan for Cu 2+, Ni 2+ and Co 2+ were studied in this paper. The results showed that the adsorption ability of the compound for Cu 2+, Ni 2+ and Co 2+ were 2.40mmol/g, 1.60mmol/g and 3.10mmol/g, respectively. The difference of adsorption ability for 3 metal ions could be related to the difference in configuration of metal ions and in coordination of complex compound. In the mixed solution of the 3 diff...