稳定且价格实惠的酸盐通过废铁去除在现实条件下的电凝阳极:长期运行的机制和被动化缓解
Haiyang Hu1, Jiayu Luo1, Linyu He1
1Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China.
Water research
|January 30, 2025
概括
这项研究介绍了一种负担得起的铁废包装床电凝系统,用于有效地从废水中去除酸盐. 与传统的铁电凝相比,新方法显著降低了成本和电极污染,确保了稳定的运行.
科学领域:
- 环境化学环境化学
- 水处理技术水处理技术
- 电化学 电化学 电化学
背景情况:
- 铁电凝 (Fe-EC) 对于去除酸盐等污染物是有效的,但由于电极污染和更换,成本昂贵.
- 新兴的有机化合物,如酸盐,在水体中构成环境挑战.
研究的目的:
- 开发一个具有成本效益和高效的电凝系统,使用废铁废料去除酸盐.
- 为了研究铁废料包装床电凝系统 (ISPB-EC) 在去除二甲三酸 (NTMP) 的性能.
- 解决和减轻电极缩放问题,以实现长期稳定的运行.
主要方法:
- 一个铁废包装床阳极电凝系统 (ISPB-EC) 被设计并使用各种电解质 (Na2SO4,NaCl,NaHCO3) 进行了测试.
- 在144 C/L的库伦比克剂量下,评估了NTMP去除效率,初始总可溶度为0.1 mM.
- 该系统的性能与传统的Fe-EC进行了比较,并采用了周期性极性逆转等策略来管理阴极缩放.
主要成果:
- 在不同的电解质中,ISPB-EC系统实现了高的NTMP去除率 (39-99%),明显优于传统Fe-EC (2-23%).
- 观察到NTMP部分转化为无机酸盐,这归因于活性氧物种和Fe (IV) O2+形成.
- 该ISPB-EC系统证明了成本效益 (€0.0067/m3 vs. €0.009/m3) 和长期稳定的运行 (336小时) 通过极性逆转来管理阴极污染.
结论:
- 开发的ISPB-EC系统为处理被酸盐污染的废水提供了负担得起和高效的解决方案.
- 定期逆极是缓解阴极缩放和确保系统长期运行稳定的有效策略.
- 使用废铁废料作为电极是对水资源整治的可持续方法,减少了环境影响和处理成本.
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