岩石矿物学杂志2009，Vol.28Issue(6)：661-664,4.
坡缕石粘土对有机染料的吸附热力学研究
A thermodynamic study of the adsorption of organic dyes on palygorskite clay
郝艳玲 1王远 1董良宇 1牛欢 1陈俊峰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
The adsorption isotherms of such organic dyes as methylene blue, crystal violet and aniline blue in water on palygorskite based on the purification of Jingyuan palygorskite clay were studied through static adsorption experiments, with a discussion on the thermodynamic characteristics. The results show that the equilibrium of the three kinds of dyes can be reached in about 30 minutes in the range of experiment temperatures, the adsorption isotherms of these three dyes on purified palygorskite fit Langmuir model fairly well, and the saturated adsorption capacities from Langmuir models are in order of crystal violet>methylene blue>aniline blue. The adsorptions of the three dyes are all endothermic processes, the adsorption enthalpies of methylene blue, crystal violet and aniline blue are 15.52, 9.26 and 2.59 kJ/mol, respectively; the adsorption Gibbs functions vary in the range of - 35 ～-30 kJ/mol and the adsorption entropies are all positive values. The adsorption processes are spontaneous.关键词
坡缕石粘土/提纯/吸附/有机染料/热力学Key words
palygorskite clay/ purification/ adsorption/ organic dyes/ thermodynamics分类
天文与地球科学引用本文复制引用
郝艳玲,王远,董良宇,牛欢,陈俊峰..坡缕石粘土对有机染料的吸附热力学研究[J].岩石矿物学杂志,2009,28(6):661-664,4.
