MCM_41介孔分子筛的合成及其对铜离子的吸附性能_朱文杰.pdf

第 8 卷 第 2 期 环 境 工 程 学 报 Vol ． 8 ，No ． 2 2 0 1 4 年 2 月 Chinese Journal of Environmental Engineering Feb ． 2 0 1 4 MCM-41 介孔分子筛的合成及其 对铜离子的吸附性能 朱文杰1，2 李明明2 马文会2* 周 阳2 伍继君2 于 洁1，2 谢克强2 ( 1. 昆明理工大学环境科学与工程学院，昆明 650093; 2. 昆明理工大学真空冶金国家工程实验室，昆明 650093) 摘 要 以微硅粉为硅源，CTAB 和 PEG-6000 为模板剂，合成 MCM-41 介孔分子筛。采用 XＲD、N 2 吸附-脱附曲线、FT- IＲ 以及 TEM 表征了其结构、比表面积、孔径分布及晶体形貌，并且以该样品为吸附剂，对含 Cu2 + 的溶液进行了静态吸附实 验。结果表明，以微硅粉为硅源成功合成了具有典型六方排列孔道结构的 MCM-41，其比表面积为 869. 5 m2 /g，孔容为 0. 97 cm 3 /g，平均孔径为 3. 3 nm; 溶液 pH 为 5 ～ 6 时，MCM-41 对 Cu2 + 的去除效果最好; MCM-41 对 Cu2 + 的最大吸附吸附容量 36. 3 mg /g; MCM-41 对 Cu2 + 的吸附性能符合 Langmuir 吸附方程的特征。动力学研究表明，该过程符合准二级动力学 模型。 关键词 微硅粉 MCM-41 分子筛 吸附 铜离子 动力学 中图分类号 X756，X131. 2 文献标识码 A 文章编号 1673-9108( 2014) 02-0513-07 Synthesis of MCM-41 mesoporous sieves and their adsorption performance of Cu 2 + Zhu Wenjie 1，2 Li Mingming 2 Ma Wenhui 2 Zhou Yang 2 Wu Jijun 2 Yu Jie 1，2 Xie Keqiang 2 ( 1. Faculty of Environmental Science and Engineering，Kunming University of Science and Technology，Kunming 650093，China; 2. National Engineering Laboratory for Vacuum Metallurgy，Kunming University of Science and Technology，Kunming 650093，China) Abstract The MCM-41 mesoporous sieves were successfully synthesized using the silica fume as silica source，and CTAB，PEG-6000 as template agents． The as-synthesized materials were characterized by XＲD，N 2 adsorption-desorption，FTIＲ and TEM． The results indicate that the prepared material has the typical well-or- dered hexagonal array of pore structure，with surface area of 869. 5 m2 /g，pore volume of 0. 97 cm3 /g and ca． pore diameter of 3. 3 nm． The adsorption performance of Cu 2 + in water solution was studied in static experiments with the MCM-41 mesoporous sieves as adsorbent． The influences of solution pH value，adsorbent dosage and ad- sorption time were investigated． It is showed that the effect of removal of Cu 2 + is best when the value of pH is be- tween 5 and 6. Langmuir equation may be better to describe the adsorption characteristics of Cu 2 + onto MCM-41，