钛柱撑蒙脱石对罗丹明B的吸附性能  

Study on Rhodamine B Adsorption onto Titanium Pillared Montmorillonite

作　　者：何正先[1] 张宝述[1,2] 彭同江[2] 孙红娟[2] 董发勤[2] 宋绵新[2] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料重点实验室,四川绵阳621010 [2]西南科技大学矿物材料与应用研究所,四川绵阳621010

出　　处：《西南科技大学学报》2011年第4期18-22,共5页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金(41072033)

摘　　要：采用酸性溶胶法制备了钛柱撑蒙脱石,研究了不同温度、pH值条件下样品对罗丹明B的吸附性能。结果表明,钛柱撑可以提高蒙脱石对水溶液中罗丹明B染料的吸附能力,吸附过程动力学符合准二级近似,为不可逆化学吸附,平衡吸附数据基本符合Langmuir和Freundlich吸附等温式;随着温度升高和pH值增大,钛柱撑蒙脱石对罗丹明B的吸附量下降,在温度298 K左右,pH值低于3时吸附效果较好。The adsorption of rhodamine B onto titanium pillared montmorillonite prepared by sol-acid method has been studied at different temperature and pH. The results indicate that the titanium pillaring can enhance the adsorption performance of rhodamine B in solution by montmorillonite. The adsorption kinetics, which followed pseudo-second order approximate model, is irreversible. The equilibrium adsorption data can better fit with both Langmuir and Freundlich adsorption isothermal equation. The adsorption capacity of rhodamine B onto titanium pillared montmorillonite decreases with the increasing of temperature and pH. The adsorption effect is better at temperature about 298 K and below pH 3.

关 键 词：钛柱撑蒙脱石 罗丹明B 化学吸附 动力学 

分 类 号：P578.963[天文地球—矿物学] TB332[天文地球—地质学]