通过微电场驱动的零价值铁促进了铁的腐蚀和增强了酸盐的去除
Chunlin Fan1, Bing Li1, Weiquan Li1
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Chemosphere
|September 6, 2023
概括
微电场通过促进铁的腐蚀和矿物质的形成来增强使用零价值铁 (Fe0) 的酸盐去除. 这种微电场驱动的Fe0 (MFD-Fe0) 柱显示了水处理的高效率,稳定性和可重复使用性.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 零价值铁 (Fe0) 在酸盐去除方面受到限制,这是由于被动Fe-P层的形成.
- 水中的酸盐污染对环境和健康构成风险.
研究的目的:
- 调查微电场 (MEF) 在增强Fe0.0的酸盐去除效果.
- 评估MEF驱动的Fe0 (MFD-Fe0) 系统的稳定性和可重复使用性.
主要方法:
- 将MFD-Fe0列与控制Fe0列进行比较.
- 批量实验使用10%体积%Fe0填充率和石英砂.
- 循环测试用于稳定性和可重复使用性评估.
- 固体相分析以检查铁的腐蚀和矿产产品.
主要成果:
- MFD-Fe0柱实现了94.1%的酸盐去除,比Fe0柱高2.8倍.
- 随着电流密度的增加,MEF显著提高了酸盐去除率,从24.5%提高到94.1%.
- 固体相分析证实促进了铁的腐蚀和石和磁铁的形成.
- 该MFD-Fe0柱显示出优异的稳定性和可重复使用性,在8个循环后保持89.7%的去除率.
结论:
- 应用MEF是一种有前途的策略,可以在酸盐去除过程中克服Fe0被动化.
- MFD-Fe0通过增加铁腐蚀,离子生成和矿物吸附点来增强酸盐的去除.
- MFD-Fe0系统提供了一种稳定且可重复使用的替代方案,可以有效地从水中恢复酸盐.
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