人造沸石吸附剂去除含锰废水中二价锰离子的研究

Study of Removal of Mn^(2+) from Polluted Water during the Absorption Process by Man-made Zeolite Particles

为了探究人造沸石颗粒吸附剂去除废水中的二价锰离子(Mn2+)的效果,进行了一系列动力学和环境条件影响的实验。去除率随着沸石颗粒投加量的增加而增加。反应平衡时间为4 h;吸附速率符合准二级动力学模型。吸附效率随着反应温度的升高而增大,pH值为4～6为最佳条件。HCl溶液的解吸附效果最好;而NaOH溶液的再生效果最好。

A series of kinetic and thermodynamic experiments were conducted in order to investigate the removal rate and efficiencies of aquatic Mn^2＋ by man-made zeolite particles. The impacts of environmental conditions were also studied. The removal rate increases in accordance with the added amount of zeolite particles. The equilibrium time is 4 hours, and it is a pseudo-second order kinetic reaction. The removal efficiency increases with temperature and reaches a peak at pH 4-6. The isotherm complies with Langmuir and Freundlich isotherms. The desorption of Mn^2＋ is the highest in HCl solution and the regeneration of zeolite particles is the best in NaOH solution.