微妙地引入膜极化催化H2O解离,启动高效的电凝,以去除硬度离子
Yang Yu1, Mengyu Zhang1, Qian Li1
1Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan 316022, China; National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan 316022, China.
Water research
|June 22, 2023
概括
这项研究引入了膜增强电凝 (MEEC) 技术,用于优质的冷却水去除硬度. 通过利用离子交换膜催化水分离,MEEC显著提高了效率并减少了污染.
科学领域:
- 水处理 处理水的方法
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 电凝 (EC) 对于冷却水的硬度去除具有前景,但由于缓慢的水解而受到影响,限制了形成,并导致二次污染.
- 电透析中的膜污染激发了一种新的策略,以提高EC的效率.
- 溶解的Al3+在传统的EC工艺中构成二次污染风险.
研究的目的:
- 通过引入膜偏振催化水解离,提高电凝中硬度去除效率.
- 研究离子交换膜 (IEM) 对水解离的催化活性.
- 改善冷却水处理中的花形成和减轻二次污染.
主要方法:
- 使用具有 (-SO3-和 -N(CH3) 3+功能组的离子交换膜 (IEM) 在电场诱导的离子耗尽下催化H2O解离.
- 在IEM功能组和被吸附的H2O之间进行杆电子转移.
- 在IEM的阳极区域周围创建了一个性区域,以促进Al3+转化为Al.
主要成果:
- 实现了超高的硬度去除率,即318.9 g h-1 m-2.
- 证明的超低的特定能耗为3.8kWh kg-1 CaCO3.
- 成功地将溶解的Al3+转化为Al,增强形成并防止二次污染.
结论:
- 膜增强电凝 (MEEC) 的性能明显优于传统的去硬化工艺.
- MEEC在各种反应条件下提供了卓越的稳定性和适用性.
- 开发的方法有效地解决了用于冷却水处理的传统电凝的局限性.
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