Filtration and adsorption properties of porous calcium alginate membrane for methylene blue removal from water
Filtration and adsorption properties of porous calcium alginate membrane for methylene blue removal from water
复制标题
多孔海藻酸钙膜去除水中亚甲基蓝的过滤和吸附性能
DOI：
10.1016/j.cej.2017.01.098
复制
发表时间：
2017-05-15
影响因子：
15.1
通讯作者：
Xia, Yanzhi
中科院分区：
文献类型：
--
作者：
Li, Qi;Li, Yanhui;Xia, Yanzhi
首先采用真空冷冻干燥法制备多孔海藻酸钙膜，然后用钙离子与钠离子进行交联反应，自然干燥制得海藻酸钙多孔膜。通过考察pH值、接触时间、温度和投加量等实验参数，研究了亚甲基蓝在海藻酸钙微孔膜上的过滤和吸附性能。吸附平衡数据用Langmuir和Freundlich等温式描述。采用准一级、准二级和颗粒内扩散方程对动力学数据进行评价。热力学分析表明，亚甲基蓝在海藻酸钙膜上的吸附为放热反应。(C)2017爱思唯尔B.V.保留所有权利。
Porous sodium alginate membrane was first prepared by vacuum freeze-dry method, then, sodium ions were substituted by calcium ions through cross-linking reaction to obtain the porous calcium alginate membrane via natural drying. The filtration and the adsorption properties of methylene blue on the porous calcium alginate membrane were studied through investigating the experimental parameters such as the pH, contact time, temperature and dosage. The data of the adsorption equilibrium were described by the Langmuir and Freundlich isotherms. The pseudo-first order, pseudo-second Order, and intra-particle diffusion equation were used to evaluate the kinetic data. Thermodynamic analysis indicated that the adsorption of methylene blue on to the porous calcium alginate membrane was an exothermic reaction. (C) 2017 Elsevier B.V. All rights reserved.