玻璃轻石吸附亚甲基蓝的研究

Study on the Adsorption of Methylene Blue by the Glass Pumice

主要研究了玻璃轻石对水中亚甲基蓝的吸附性能,研究了吸附平衡时间、酸碱度(pH值)、玻璃轻石的用量、水相中亚甲基蓝的起始浓度等因素对吸附能力的影响。实验结果显示,吸附在60 min内可达到吸附平衡,吸附过程的动力学方程用准二级动力学模型能更好地进行线形拟合,当水体中pH>2时吸附效果最好。水样中亚甲基蓝的起始浓度减少,亚甲基蓝的吸附率略有上升,吸附过程能用弗罗因德利希(Freundlich)吸附等温方程描述。

The adsorption of methylene blue in water by glass pumice was studied.The effects of adsorption equilibrium time,pH value,the amount of glass pumice and the initial concentration of methylene blue in aqueous phase on the adsorp⁃tion capacity were also studied.The experimental results showed that adsorption equilibrium could be reached within 60 min.the pseudo second order kinetic model can be used to fit the adsorption process.When the pH value in water is more than two,the adsorption effect is the best.The initial concentration of methylene blue in water sample decreased,and the ad⁃sorption rate of methylene blue increased slightly.The adsorption process can be described by Freundlich isotherm equation.