序构分离-吸附膜对多组分污染物的去除  

SEQUENTIAL SEPARATION-ADSORPTION MEMBRANE FOR REMOVAL OF MULTI-COMPONENT POLLUTANTS

作　　者：谢佳 廖志鹏 齐俊文[1] 王超海 李健生[1] XIE Jia;LIAO Zhi-peng;QI Jun-wen;WANG Chao-hai;LI Jian-sheng(Key Laboratory of MIIT of New Membrane Material,College of Environment and Biology Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]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

出　　处：《环境工程》2021年第7期139-144,共6页Environmental Engineering

基　　金：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/cm^(2)。以腐植酸与Cu^(2+)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/(m^(2)·h)通量工况下,先分离后吸附的序构设计可同步去除HA和Cu^(2+),去除率分别为95.4%和97%,Cu^(2+)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Cu^(2+)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。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/cm^(2).The decontamination performance results showed that the sequenced structure could simultaneously remove humic acid and Cu^(2+)with removal rate of 95.4%and 97%,at a pressure of 1.6 bar and a flux of 45 L/(m^(2)·h)and protected the process of Cu^(2+)removal from the interference of the coexisted humic acid;compared with the method of surface deposition,the effective removal volume of Cu^(2+)could be increased by three times by the DFUM.This study provided a novel strategy for excellent removal of multiple pollutants in water.

关 键 词：分离-吸附双功能膜 ZIF-8 重金属 腐植酸 序构微界面 

分 类 号：X703[环境科学与工程—环境工程]