摘要
将甘肃靖远坡缕石粘土分离提纯,通过静态吸附实验,研究了坡缕石对水中有机染料亚甲基蓝、结晶紫和苯胺蓝的吸附等温线,探讨了吸附热力学特征。实验结果显示,在实验温度范围内3种染料在坡缕石上的吸附在30min可达平衡,吸附等温线均能较好符合Langmuir模型,饱和吸附量大小顺序为:结晶紫>亚甲基蓝>苯胺蓝;吸附均为吸热过程,亚甲基蓝、结晶紫和苯胺蓝的吸附焓分别为15.52、9.26和2.59kJ/mol;吸附Gibbs函数约为-35～-30kJ/mol,吸附熵均大于零,吸附是自发过程。
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 violetmethylene blueaniline 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.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2009年第6期661-664,共4页
Acta Petrologica et Mineralogica
关键词
坡缕石粘土
提纯
吸附
有机染料
热力学
palygorskite clay
purification
adsorption
organic dyes
thermodynamics
