序构分离-吸附膜对多组分污染物的去除

谢佳; 廖志鹏; 齐俊文; 王超海; 李健生

doi:10.13205/j.hjgc.202107018

序构分离-吸附膜对多组分污染物的去除

doi: 10.13205/j.hjgc.202107018

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）

详细信息

作者简介:
谢佳(1997-),男,博士研究生,主要研究方向为水污染控制。xiejia0114@njust.edu.cn

通讯作者:
李健生(1969-),男,教授,主要研究方向为环境纳米技术的开发及水污染控制。lijsh@njust.edu.cn

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出版历程
- 收稿日期: 2020-12-31
- 网络出版日期: 2022-01-18

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

Key Laboratory of MIIT of New Membrane Material, College of Environment and Biology Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

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。
- 分离-吸附双功能膜 /
- ZIF-8 /
- 重金属 /
- 腐植酸 /
- 序构微界面
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.
- dual-function ultrafiltration membrane /
- ZIF-8 /
- heavy metal ions /
- humic acid /
- sequenced micro-interface

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