摘要
对焙烧态镁铝水滑石吸附水溶液中溴离子进行了研究,考察了吸附时间、吸附液p H值和吸附温度对吸附量的影响,计算得到了有关动力学和热力学参数。结果表明:焙烧态镁铝水滑石对溴离子的吸附基本符合二级反应速率方程和Langmuir吸附等温式,500℃焙烧态水滑石(n Mg/n Al=4)的饱和吸附量达119.05mg·g-1。
Mg-Al hydrotalcites with 4 Mg/Al mole ratios is prepared by co-precipitation method, calcined at 500℃to get the calcined samples. The adsorption capacity of bromide ion from simulated waste water on Mg-Al calcined samples is measured. We investigate the effect of adsorptive time ,pH value of initial adsorbate solution and adsorptive temperatures on the adsorption capacity of Mg-Al calcined samples. The kinetic and equilibrium data of adsorption studies are processed , and the kinetic and thermodynamic parameters are calculated. The results show that the adsorption of Mg-Al calcined samples for bromide ion is an exothermic physic sorption , which fits well with second-order kinetic equation and Langmuir isotherm model. The Mg-Al calcined hydrotalcites adsorption capacity is 119.05mg·g-1 at 40℃.
出处
《科技通报》
北大核心
2016年第3期214-217,共4页
Bulletin of Science and Technology
关键词
焙烧态镁铝水滑石
吸附
溴离子
Mg-Al calcined hydrotalcites
adsorption
bromide ion
