在废水中的重金属离子的分离和再利用,由p-BN吸附剂辅助
Jianzheng Zhen1, Lingshan Miao1, Zhilong Lin1
1National Engineering Lab of Textile Fiber Materials & Processing Technology (Zhejiang), Zhejiang Sci-Tech University, Hangzhou, 310018, China.
Chemosphere
|March 18, 2024
概括
多孔化 (p-BN) 有效地从废水中去除重金属,使有机污染物降解的催化剂同时形成. 这种方法为水资源整治和资源回收提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废水中的重金属污染对环境和健康构成重大风险.
- 传统的吸附剂往往表现出不完全的去除和低效的金属回收.
- 需要先进的材料来有效处理废水和利用资源.
研究的目的:
- 开发一种基于多孔化 (p-BN) 的方法,用于高效的重金属提取和同时形成催化剂.
- 评估p-BN在废水中超微量去除重金属方面的性能.
- 为了证明金属吸附p-BN的再利用作为有机污染物降解的催化剂.
主要方法:
- 使用高密度N原子合成多孔化 (p-BN).
- 从水溶液中吸附重金属离子 (Pb2+,Cd2+,Co2+,Fe3+) 的实验.
- 有机污染物的催化降解使用p-BN/CoOx作为激活过氧硫酸盐 (PMS) 的催化剂.
- 使用p-BN/聚乙烯化物 (PVDF) 膜构建一个通过流的多阶段系统.
主要成果:
- 对于重金属,p-BN具有很高的吸附能力,分布系数超过10-6mLg-1 .
- 重金属残留度降至超微量水平 (0.8-1.3μg L-1),符合世卫组织饮用水标准.
- 在p-BN上吸附的可以通过PMS激活促进有机污染物的有效催化降解.
- 一个多阶段系统有效地实现了金属离子分离和污染物去除.
结论:
- p-BN 是一种有前途的材料,可以有效地去除重金属和从废水中回收资源.
- 作为吸附剂和催化剂前体的p-BN的双重功能提供了一个可持续且具有成本效益的整治策略.
- 开发的流通系统为综合废水处理和资源管理提供了一种新的方法.
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