椰壳对水中亚甲基蓝的吸附研究  

Adsorption characteristics of methylene blue in aqueous solution by coconut shell

作　　者：王春英[1] 李俊南 林鸿鹏 刘茹[1] 黄晓霞[1] Wang Chunying;Li Junnan;Lin Hongpeng;Liu Ru;Huang Xiaoxia(School of Chemistry and Environment, Jiaying University, Meizhou 514015)

机构地区：[1]嘉应学院化学与环境学院,梅州514015

出　　处：《化工新型材料》2018年第5期266-269,273,共5页New Chemical Materials

基　　金：广东省自然科学基金(2015A030313640);广东省大学生创新训练计划项目(201410582029)

摘　　要：以椰壳为吸附剂,研究了温度、pH、粒径和共存阳离子等因素对其吸附亚甲基蓝的影响及吸附特性。结果表明:椰壳对亚甲基蓝吸附快速,10min内吸附量达到平衡吸附量的90%;伪二级动力学方程较好地描述了其吸附行为;吸附过程受颗粒内扩散与液膜扩散的共同影响。温度对吸附的影响较小;pH=4~12范围内椰壳对亚甲基蓝的吸附较好;亚甲基蓝初始浓度的增加、椰壳粒径的减小以及共存阳离子的存在,均有利于提高其对亚甲基蓝的吸附量。The adsorption characteristics of methylene blue（MB）from aqueous solution onto coconut shell（CS）were investigated by parameters such as temperature,solution pH,particle size and competitive cation.The results indicated that CS adsorbed MB in a short time and the adsorption achieved 90% of equilibrium absorption in 10 minutes.The kinetic experimental results were best adjusted to the pseudo second order model.The results showed that the sorption process was influenced and controlled by intra-particle diffusion and liquid film diffusion.The temperature had less influence on adsorption for CS.The CS adsorbed MB effectively from wastewater at pH=4~12.The increasing of MB initial concentration,the decreasing of CS particle size and the existing of cation were in favour of improving the adsorption capacity of MB onto CS.

关 键 词：亚甲基蓝 椰壳 吸附 

分 类 号：O647.3[理学—物理化学] X703[理学—化学]