改性介孔微孔分子筛去除水中亚甲基蓝的研究  

Removal of Methylene Blue in Wastewater by Chitosan-Coated Micro-Mesoporous Zeolite

作　　者：郭祎阁[1] 赵颖[2] 龚斌[2] 郭宇杰[3] 刘东方[1] 黄文力[1] 

机构地区：[1]南开大学,天津300350 [2]中国环境科学研究院,环境风险与基准评估国家重点实验室,北京100012 [3]华北水利水电大学,河南郑州400001

出　　处：《水处理技术》2016年第9期28-32,共5页Technology of Water Treatment

基　　金：国家“十二五”科技支撑计划(2012BAJ21B04);国家自然科学基金青年基金(51108436)

摘　　要：以壳聚糖包覆介孔-微孔复合分子筛(CS/MCM-41-A)为吸附剂去除水中的亚甲基蓝,研究了反应时间、溶液pH、溶液亚甲基蓝初始浓度、CS/MCM-41-A投加量、竞争离子对吸附的影响,分析了CS/MCM-41-A的吸附动力学和热力学特征。结果表明,25℃下,当CS/MCM-41-A投加量为0.3 g/L,溶液亚甲基蓝初始浓度100 mg/L,pH为6,吸附时间为40 min时,溶液中亚甲基蓝的去除率达到92.57%。CS/MCM-41-A吸附亚甲基蓝符合拟二级动力学方程,吸附等温线更好地符合Langmuir方程,CS/MCM-41-A对亚甲基蓝的有良好的吸附性能。Chitosan-coated meso-microporous zeolite CS/MCM-41-A was used to remove methylene blue from water. The influences of several important parameters on methylene blue removal, such as the mass ratio of adsorbent dosage, contact time, pH value, initial concentration were investigated. The kinetic and thermodynamic models were also analyzed. The results indicated that, under the condition of 298 K, when the dosage was 0.3 g/L, the initial concentration was 100 mg/L, the pH was 6, and the reaction time lasted 40 min, the removal rate of methylene blue was 92.57%. The second-order kinetic model provided excellent kinetic data fitting. Langmuir model agreed more with experimental data. This proves that CS/MCM-41-A will be a good kind of potential materials of adsorption for methylene blue removal.

关 键 词：复合分子筛 壳聚糖 亚甲基蓝 吸附 

分 类 号：TQ424[化学工程]