摘要
在OH- 和Al3 + 的摩尔比为 2 .4的反应条件下 ,利用Al3 + 与碱液反应制备出Keggin离子 ,并由此制备出了无机、无机有机柱撑膨润土。XRD衍射数据表明 :经柱撑后的膨润土层间距明显增大 ,达 1 .9nm以上。研究了苯胺在 4种改性膨润土上的吸附行为 ,结果表明 :经柱撑处理后的膨润土吸附能力明显大于钠基土 ,其吸附动力学行为遵循Bangham方程和Langmuir方程所描述的规律 ,平衡吸附量qe与平衡质量浓度 ρe之间的关系符合Freundlich和Langmuir等温吸附方程 ,吸附表现为放热的物理吸附和有机质的分配作用。
Inorgano-organo-montmorillonite was synthesized by titrating Na-montmorillonite with soda-aluminum solution on the reaction condition of OH- and A13+ in 2.4 molar ratio. XRD result indicates that the interlayer spacing of montmorillonites is increased obviously and reaches to 1.9 nm or more. The adsorption behavior of aniline on four modified montmorillonite samples was also studied and the results show that the adsorbability of inorgano-organo-montmorillonites is much better than that of Na-montmorillonites. The adsorption dynamics follows the laws of Bangham and Langmuir. The relationship between adsorbing capacity (qe) and equilibrium mass concentration (pe) is in accordance with the isothermal adsorption equations of Freundlich and Langmuir. The adsorption is presented by heat evolution physisorption and organic partition.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2004年第8期988-991,共4页
Journal of The Chinese Ceramic Society
关键词
柱撑膨润土
吸附
苯胺
动力学
热力学
Adsorption isotherms
Organic compounds
Silicates
Thermodynamics
