岩石矿物学杂志2011，Vol.30Issue(6)：1069-1073,5.
坡缕石/氧化铝复合材料对磷的吸附动力学和热力学
Kinetics and thermodynamics of the adsorbing phosphate from water on palygorskite/alumina compound material
郝艳玲 1范福海1
作者信息
- 1. 兰州交通大学化学与生物工程学院,甘肃兰州730070
- 折叠
摘要
Abstract
In this paper, palygorskite/alumina composite materials were prepared as the adsorbent by using sol-gel technique, and the adsorption properties and mechanisms of complex adsorbing phosphate were investigated, with a discussion on the adsorption kinetics and thermodynamic characteristics. The results demonstrate that the adsorption processes of phosphate on complex surface follow the pseudo-second-order equation most effectively and the rate constant increases with decreasing initial concentration and the rise of temperature. The adsorption isotherms fit Langmuir equation and D-R equation fairly well. The adsorption enthalpy is positive and the adsorption Gibbs free energy changes are in the range of - 25 ~ - 21 kJ/mol. The adsorption process is endother-mic and spontaneous, with the coexistence of physical adsorption and chemical adsorption.关键词
坡缕石粘土/吸附/磷/动力学/热力学Key words
palygorskite clay/ adsorption/ phosphate/ kinetics/ thermodynamics分类
天文与地球科学引用本文复制引用
郝艳玲,范福海..坡缕石/氧化铝复合材料对磷的吸附动力学和热力学[J].岩石矿物学杂志,2011,30(6):1069-1073,5.
