锆基金属有机框架的绿色合成及其对染料废水的吸附性能
Green synthesis of zirconium-based metal organic frameworks and their adsorption performance on dye wastewater
王东东 1胡旭 1赵亚峰 1宋燕西2
作者信息
- 1. 东华大学环境科学与工程学院,上海
- 2. 东华大学环境科学与工程学院,上海;东华大学国家环境保护防治污染纺织工程技术中心,上海;复旦大学聚合物分子工程国家重点实验室,上海
- 折叠
摘要
传统锆(Zr)基金属有机框架(MOFs)材料大多使用有毒的配体和溶剂合成,在去除污染物的同时引入新的污染物.采用水热法合成了以L-天冬氨酸(LA)为配体的Zr基MOFs材料MIP-202,以期开发一种绿色环保且具有优异吸附性能,并可循环利用的吸附剂.以亚甲基蓝(MB)为去除对象,研究pH、吸附时间、温度和共存离子对MIP-202吸附性能的影响,拟合了动力学和热力学参数,并考察了吸附剂的循环利用性能和实际应用效果.结果表明:吸附容量随pH的升高而增大;吸附过程属于放热反应,并遵循准二级动力学和Langmuir吸附等温式,最大吸附容量为192.31 mg/g;吸附性能受共存离子的影响较小;5次循环使用后吸附容量仍有初始吸附容量的85.10％.模拟纺织废水试验表明该吸附剂具有实际应用价值.
Abstract
Most conventional zirconium(Zr)-based metal organic frameworks(MOFs)use toxic ligands and solvents,which introduce new contaminants while removing them.MIP-202,a Zr-based MOFs material with L-aspartic acid(LA)as ligand,was synthesized by hydrothermal method in order to develop a green and environmentally friendly adsorbent with excellent adsorption performance and recyclability.The effects of pH,adsorption time,temperature and co-existing ions on the adsorption performance of MIP-202 were investigated using methylene blue(MB)as the removal target,kinetic and thermodynamic parameters were fitted,and the recycling performance and practical application of the adsorbent were investigated.The results show that:the adsorption capacity increases with pH;the adsorption process is exothermic and follows pseudo-second kinetics and Langmuir adsorption isotherm with a maximum adsorption capacity of 192.31 mg/g;the adsorption performance is less affected by coexisting ions;the adsorption capacity is still 85.10％of the initial adsorption capacity after 5 cycles.The model textile effluent experiment shows the practical application of this adsorbent.
关键词
金属有机框架/水热法/L-天冬氨酸/亚甲基蓝/吸附性能/绿色合成Key words
metal organic framework/hydrothermal method/L-aspartic acid/methylene blue/adsorption property/green synthesis引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据