蒙脱石微囊的制备及其吸附性能研究  

Preparation and Adsorption Properties of Montmorillonite Microcapsules

作　　者：林森[1,2] 孙仕勇[1,2,3] 申珂璇 董发勤 马彪[1,3] 王可 

机构地区：[1]西南科技大学非金属矿研究所固体废物处理与资源化教育部重点实验室,四川绵阳621010 [2]西南科技大学低成本废水处理技术四川省国际科技合作基地,四川绵阳621010 [3]四川省非金属矿粉体改性与高质化利用技术工程实验室,四川绵阳621010

出　　处：《非金属矿》2017年第6期12-15,共4页Non-Metallic Mines

基　　金：国家自然科学基金(41672039);西南科技大学研究生创新基金(17ycx044)

摘　　要：以有机改性蒙脱石为囊膜壁壳,采用皮克林乳液法制备蒙脱石微囊。利用光学显微镜、扫描电镜和红外光谱对所制蒙脱石微囊的形貌和结构进行了表征。通过蒙脱石微囊对亚甲基蓝和罗丹明B的吸附行为,探讨了其吸附性能。采用单因素法考察了微囊浓度、溶液p H值对染料分子吸附性能的影响。探讨了微囊对亚甲基蓝和罗丹明B混合染料的选择性吸附。结果表明:所制蒙脱石微囊经正硅酸乙酯交联后形貌保持较完整。微囊的红外特征吸收峰与蒙脱石特征吸收峰一致。不同微囊浓度和p H值条件下,蒙脱石微囊吸附亚甲基蓝和罗丹明B的过程符合一级动力学方程。微囊对亚甲基蓝和罗丹明B混合染料的吸附具有选择性,对亚甲基蓝的吸附速率高于罗丹明B。Oranic modified montmorillonite is used as membrane wall for preparation of mierocapsules by Picketing emulsion method. The morphology and structure of prepared montmorillonite microcapsules were characterized through optical microscope, scanning electron microscope and infrared spectroscopy. The adsorption performance was investigated based on the adsorption of methylene blue and and rhodamine B by montmorillonite microcapsules. The effects of microcapsule concentration and pH on the adsorption properties of dye molecules were investigated through single factor method. The selective adsorption of methylene blue and Rhodamine B mixed dyes by microcapsules was also investigated. Results showed that the morphology of prepared montmorillonite mierocapsules was remained intact after being cross-linked by tetmethoxysilane. The bands of characteristic spectra of microcapsules were consistent with originalmontmorillonite. The adsorption processes of methylene blue and rhodamine B by montmorillonite microcapsules were matched with manner of the pseudo first-order equation. The competitive mixed dye adsorption by mierocapsules is selective with inhanced adsorption rate of methylene blue than that of Rhodamine B.

关 键 词：有机改性蒙脱石 蒙脱石微囊 有机染料 吸附 动力学 

分 类 号：TD985[矿业工程—选矿]