序构分离-吸附膜对多组分污染物的去除 |
| |
引用本文: | 谢佳,廖志鹏,齐俊文,王超海,李健生.序构分离-吸附膜对多组分污染物的去除[J].环境工程,2021,39(7):139-144. |
| |
作者姓名: | 谢佳 廖志鹏 齐俊文 王超海 李健生 |
| |
作者单位: | 南京理工大学 环境与生物工程学院 新型膜材料工业和信息化部重点实验室, 南京 210094 |
| |
基金项目: | 国家重点研究发展计划(2019YFC0408302);国家自然科学基金(51678307) |
| |
摘 要: | 传统的膜分离难以实现低压下多组分污染物的同步去除。通过错流灌装的方式将沸石咪唑酯骨架结构材料ZIF-8灌装到非对称超滤膜分离层下的指状孔内,制备了序构分离-吸附双功能膜(DFUM),并开展了其对水中复合污染物同步去除性能的研究。在不改变原始膜结构与截留性能的基础上,DFUM内ZIF-8纳米粒子的负载量可达到2.87 mg/cm2。以腐植酸与Cu2+为模型污染物,考察其在多种污染物共存体系的去污性能,结果显示:在0.16 MPa压力和45 L/(m2·h)通量工况下,先分离后吸附的序构设计可同步去除HA和Cu2+,去除率分别为95.4%和97%,Cu2+的去除性能不受共存的腐植酸影响;与表面沉积的方式相比,DFUM对废水中Cu2+的有效去除体积可提高3倍。研究可为水中多组分污染物的低压同步去除提供新的策略。
|
关 键 词: | 分离-吸附双功能膜 ZIF-8 重金属 腐植酸 序构微界面 |
收稿时间: | 2020-12-31 |
SEQUENTIAL SEPARATION-ADSORPTION MEMBRANE FOR REMOVAL OF MULTI-COMPONENT POLLUTANTS |
| |
Institution: | Key Laboratory of MIIT of New Membrane Material, College of Environment and Biology Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
| |
Abstract: | Traditional membrane separation is unable to achieve simultaneous removal of multiple pollutants under low pressure. In this paper, the sequenced separation-adsorption dual-function ultrafiltration membrane(DFUM) was prepared by immobilizing ZIF-8 into the finger-like pores of the asymmetric ultrafiltration membrane for multiple pollutants simultaneous removal. Without changing the original membrane structure and retention performance of DFUM, the loading capacity of ZIF-8 nanoparticles could reach 2.87 mg/cm2. The decontamination performance results showed that the sequenced structure could simultaneously remove humic acid and Cu2+ with removal rate of 95.4% and 97%, at a pressure of 1.6 bar and a flux of 45 L/(m2·h) and protected the process of Cu2+ removal from the interference of the coexisted humic acid; compared with the method of surface deposition, the effective removal volume of Cu2+ could be increased by three times by the DFUM. This study provided a novel strategy for excellent removal of multiple pollutants in water. |
| |
Keywords: | |
|
| 点击此处可从《环境工程》浏览原始摘要信息 |
| 点击此处可从《环境工程》下载免费的PDF全文 |