壳聚糖/海藻酸钠复合凝胶对Cu2+的吸附性能研究

• 作 者: 傅明连 方江波 陈彰旭 李健 柳玉波 陈协鑫
• 机 构: 莆田学院环境与生物工程学院,福建省新型污染物生态毒理效应与控制重点实验室,
• 出 处: 化工新型材料
• 发表日期: 2016年12期
• 关键词: 壳聚糖 海藻酸钠 复合凝胶 吸附性能

采用乳化交联法,以戊二醛为交联剂,制备壳聚糖(CTS)/海藻酸钠(SA)复合凝胶,研究其对铜离子(Cu~(2+))的吸附性能,并采用FT-IR对其结构进行表征。进一步研究了复合凝胶对Cu~(2+)的等温吸附平衡曲线及动力学吸附行为。结果表明:CTS/SA复合凝胶对Cu~(2+)的吸附率最高可达99.06%,吸附过程遵循Freundlich等温吸附模型,吸附过程动力学符合拟二级动力学方程。复合凝胶可再生使用,再生5次后,吸附率仍高于95%。

Chitosan (CTS) / sodium alginate (SA) composite gels were prepared by emulsification cross-linking method and glutaraldehyde as cross-linking agent to study the adsorption properties of copper ions (Cu 2+) Its structure was characterized by FT-IR. The isothermal adsorption equilibrium curve and kinetic adsorption behavior of Cu ~ (2+) on the composite gel were further studied. The results showed that the adsorption rate of Cu 2+ by CTS / SA composite gel was up to 99.06%. The adsorption process followed the Freundlich adsorption isotherm and the kinetics of adsorption was in accordance with the pseudo second-order kinetic equation. The composite gel can be regenerated and the adsorption rate is still higher than 95% after regeneration for 5 times.