摘要
采用平衡吸附法,研究了pH、时间、溶液浓度及温度对豆壳粉吸附水溶液中Cu2+的影响。结果表明,吸附的最佳pH值为5.5,吸附平衡时间为90 min,其动力学行为更好地符合Lagergren准二级反应动力学模型。等温吸附数据符合Langmuir模型,20℃时饱和吸附量达到21.93 mg/g。豆壳粉吸附Cu(II)的机理为化学吸附。可以用HCl溶液作为解吸剂,该材料具有较好的重复利用性。
With the method of equilibrium adsorption, we studied the effects of pH, time, solution concentration and temperature on bean shell powder＇s adsorption of Cu2 ＋ in water solution. It turned out that the optimum pH value of adsorption was 5.5, the equilibrium time of adsorption was 90 min, and its dynamic behavior to be better fit the Lagergren pseudo - second order kinetic model. Isothermal adsorption was in accordance with Langmuir model, the saturated adsorption capacity of 20 ℃ had reached 21.93 mg / g. The mechanism for bean shell powder adsorpd Cu （II） was chemisorption. HC1 solution could be considered as a desorption agent, this material has better availability of reusing.
出处
《环境与发展》
2012年第6期122-125,共4页
Environment & Development
关键词
豆壳粉
吸附
CU2+
等温吸附
bean shell powder
adsorption
Cu2 ＋
isothermal adsorption
