摘要
以热酸活化过的海泡石为吸附剂 ,研究其对亚甲基蓝、结晶紫和甲基绿 3种染料的吸附动力学过程 ,并分析了浓度、温度等因素对海泡石吸附效果的影响。结果表明 ,温度的变化对吸附的影响较小 ,而染料溶液浓度的改变则会对吸附产生很大的影响 ,由此确定出较适合的反应条件。采用傅立叶红外光谱技术对吸附前后海泡石的结构进行了分析 ,发现亚甲基蓝由于分子体积较小可以进入海泡石内部通道 ,而大体积的结晶紫和甲基绿的吸附主要发生在海泡石外表面 ,且一价有机阳离子会在中性位置发生吸附 。
The adsorption kinetic processes of methylene blue, crystal violet and methyl green from aqueous solution on activated sepiolite were studied, and the effects of concentration and temperature on adsorption were analyzed. FTIR measurement was performed on sepiolite and sepiolite_dyes. The results show that the concentration has greater influence on the adsorption behavior than the temperature. Due to its small molecular dimensions, methylene blue can migrate into the tunnels of sepiolite, while the more voluminous dyes such as crystal violet and methyl green are mainly adsorbed on the external surface of sepiolite. Monovalent organic cations can be adsorbed on the neutral sites of sepiolite and form neutral or monovalently charged complexes.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2003年第4期377-380,共4页
Acta Petrologica et Mineralogica
基金
天津市高等学校科技发展基金资助项目 ( 2 0 0 10 40 3 )
