碳纳米管吸附去除工业废水中亚甲基蓝的研究

摘要

研究了碳纳米管作为一种新型吸附剂去除水中亚甲基蓝.考察了溶液pH值、振荡时间、温度等对亚甲基蓝吸附的影响.溶液pH对亚甲基蓝吸附影响较大,动力学数据显示吸附在8h达到平衡.通过对吸附数据拟合,发现在温度为298-338K和浓度为2.5-12.5mg/L的范围内,碳纳米管对亚甲基蓝的吸附等温线均符合弗仑德里希(Feundlich)兰缪儿(Langrauir)吸附等温式.%Oxidized carbon nanotubes were used as a novel adsorbent for removing methylene blue from aqueous solution as a function of pH, contact time and temperature. Methylene blue adsorption on carbon nanotubes was strongly dependent on pH. Kinetic data indicated that the adsorption process achieved equilibrium within 8h. The adsorption at a temperature of 296-313K and the concentration of 2.5-12.5mg/L of methylene blue onto carbon nanotubes follow the Freundlich-type and Langmuir-type adsorption isotherms.