草木灰对Cd^(2+)废水吸附性能和动力学特征研究  

Study on adsorption capacity and kinetic characteristics of plant ash for Cd^(2+) in sewage water

作　　者：李旭东[1] 毛志成[1,2] 谢翼飞[1] 杨阳[1,2] 

机构地区：[1]中国科学院成都生物研究所,成都610041 [2]中国科学院研究生院,北京100049

出　　处：《东北农业大学学报》2013年第8期39-42,共4页Journal of Northeast Agricultural University

基　　金：国家"863"项目(2008AA06A409)

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.

关 键 词：吸附 草木灰 镉 动力学 废水处理 

分 类 号：F323.7[经济管理—产业经济]