摘要
采用平衡吸附法研究草木灰投加比和反应时间对Cd2+的吸附影响及其动力学特征,并运用Langergren模型对吸附过程进行拟合。结果表明,草木灰对Cd2+的吸附动力学行为符合Langergren准二级反应动力学模型,吸附等温线符合Langmuir模型且表现为有利吸附。在室温下草木灰对Cd2+的饱和吸附量为136.99 mg.L-1。
By means of equilibrium adsorption approach, the influence of adsorption and Kinetic studies were carried out by considering dosage ratio of plant ash, and reaction time on adsorptive Cd^2＋ by using plant ash. The results showed that the kinetics of the reaction accord with the Langmergren quasi second order kinetic model and the adsorption isotherms of the Langmuir model, showing a favorable adsorption. The saturate adsorption capacity was 136.99 mg· L^-1 at room temperature.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2013年第8期39-42,共4页
Journal of Northeast Agricultural University
基金
国家"863"项目(2008AA06A409)
关键词
吸附
草木灰
镉
动力学
废水处理
adsorption
plant ash
cadmium ion
kinetics
disposal of the waste water
