摘要
以黏土为骨料制备多孔陶粒,研究了该陶粒对Cd2+的吸附能力、吸附动力学和吸附机理。结果表明,黏土基陶粒对Cd2+具有良好的吸附能力;陶粒对Cd2+的吸附符合准二级吸附速率方程,颗粒内扩散模型确定吸附过程由2个或多个步骤控制;陶粒中的—OH、C—O基团参与了对Cd2+的吸附,形成了CdO新相,说明陶粒对Cd2+的吸附包括化学吸附。
The porous ceramsite has been prepared by using lay as aggregate.The Cd2＋ adsorption capacity of ceramsite,the adsorption kinetics and adsorption mechanism are investigated.The results show that the clay-based ceramsite has excellent Cd2＋ adsorption capacity.The adsorption kinetic model shows that the Cd2＋ adsorption capacity of ceramsite agrees with quasi-two adsorption rate equation.The intrapartical confusion model determines that the adsorption process is controlled by two or more procedures.The —OH and C—O groups of the ceramsite participate in Cd2＋ adsorption and form kainotype CdO,indicating that the Cd2＋ adsorption of ceramsite includes chemical adsorption.
出处
《工业水处理》
CAS
CSCD
北大核心
2011年第3期49-52,共4页
Industrial Water Treatment
基金
山西省国际科技合作项目(2007081029
2009081046)
关键词
多孔陶粒
含铬废水
吸附动力学
化学吸附
porous ceramsite
cadmium-contairning wastewater
adsorption kinetics
chemical adsorption
