壳聚糖负载膨润土交联膜的制备及其在水处理中的应用

发布时间：2018-06-30 09:28

  本文选题：壳聚糖 + 膨润土　； 参考：《沈阳理工大学》2015年硕士论文

【摘要】：本论文主要是利用壳聚糖与膨润土各自的优点,在微波辐射下,将这两种吸附剂相结合,制备出交联壳聚糖膜(CCTS-m)、壳聚糖负载膨润土膜(CTS-Bent-m)和壳聚糖负载膨润土交联膜(CCTS-Bent-m)。根据对废水中重金属离子和染料的吸附量大小,研究了制备这三种膜的最优条件,探讨了影响其吸附性能的因素,考察了三种吸附剂在吸附动力学和吸附热力学上的吸附机理。通过研究结果表明:(1)通过单因素和正交实验确定了CCTS-m、CTS-Bent-m和CCTS-Bent-m的最佳制备条件:在处理铜离子溶液时,CCTS-m的是1%戊二醛溶液0.5ml,微波辐射时间9min,微波反应温度60℃;CTS-Bent-m的是壳聚糖与膨润土质量比例3:1,微波辐射时间15min,微波反应温度60℃;CCTS-Bent-m是壳聚糖与膨润土质量比例3:2,1%戊二醛溶液0.7ml,微波辐射时间6min,微波反应温度50℃;在处理酸性大红溶液时,CTS-Bent-m的是壳聚糖与膨润土质量比例3:1,微波辐射时间15min,微波反应温度55℃;CCTS-Bent-m是壳聚糖与膨润土质量比例3:3,1%戊二醛溶液0.7ml,微波辐射时间15min,微波反应温度65℃。(2)红外光谱(FT-IR)和扫描电镜(SEM)结果表明:CCTS-m和CCTS-Bent-m出现了希夫碱的特征峰,CTS-Bent-m和CCTS-Bent-m中出现了壳聚糖和膨润土的特征峰,壳聚糖和膨润土通过化学吸附结合在一起,CTS、CCTS插层于膨润土层间,三种膜表面凸起结构很多,吸附表面积大,有利于吸附反应的进行。(3)探讨了在不同p H、吸附时间、投加量、初始浓度和温度条件下对Cu2+和酸性大红的吸附特性。(4)考察了CCTS-m、CTS-Bent-m和CCTS-Bent-m在不同温度下对Cu2+和酸性大红的吸附热力学和吸附动力学,分别使用Langmuir热力学、Freundlich热力学和准一级动力学、准二级动力学模型分析拟合实验数据。(5)综合比较三种膜的各种性能后,CCTS-Bent-m性能最佳。
[Abstract]:In this paper, the cross-linked chitosan membrane (CCTS-m), the chitosan supported bentonite film (CTS-Bent-m) and the chitosan supported bentonite cross-linked film (CCTS-Bent-m) were prepared by using the advantages of chitosan and bentonite under microwave irradiation. Based on the adsorption capacity of heavy metal ions and dyes in wastewater, the optimal conditions for preparing these three membranes were studied, the factors affecting their adsorption properties were discussed, and the adsorption mechanism of the three adsorbents in adsorption kinetics and thermodynamics were investigated. The results show that: (1) the optimum preparation conditions of CTS-Bent-m and CCTS-Bent-m have been determined by single factor and orthogonal experiment: in the treatment of copper ion solution, the CCTS-m is 0.5 ml of 1% glutaraldehyde solution, the microwave radiation time is 9 min, and the microwave reaction temperature is 60 鈩，

本文编号：2085819