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简单和低成本的电活性膜用于氨回收
Xinyi Wang1, Sungju Im1, Bongyeon Jung1
1University of California, Los Angeles (UCLA), Department of Civil & Environmental Engineering, Los Angeles, California 90095, United States.
Environmental science & technology
|June 15, 2023
概括
研究人员开发了一种低成本的电导膜 (ECM),用于从废水中回收氨. 这种创新材料有效地剥离氨,将污染物转化为用于肥料生产的宝贵资源.
科学领域:
- 环境工程 环境工程
- 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:
- 废水中的氨是一种需要去除的污染物.
- 氨是肥料生产的关键原料,使其回收具有价值.
- 对于稀释流,现有的氨去除方法可能不具有成本效益或效率.
研究的目的:
- 开发和评估一种简单,低成本的氨气剥离膜,用于废水回收.
- 为了证明电导膜 (ECM) 在转化和回收氨中的有效性.
- 在不同的操作条件下评估ECM的性能.
主要方法:
- 使用碳布和聚烯制造电导膜 (ECM).
- 将阴极电位应用于ECM以产生氧化离子.
- 电驱动的氨通过疏水膜脱落到酸性溶液中.
- 基于不同电流密度和流速的氨流和能效的性能评估.
主要成果:
- 该ECM成功地将离子转化为用于剥离的氨气.
- 在6.25mA.cm-2时达到141.3±14.0g.cm-2 .day-1的高氨流量.
- 证明能效为69.2 ± 5.3 公斤/kWh.
- 发现氨流对电流密度和酸循环速率敏感.
结论:
- ECM提供了一种简单,低成本和有效的方法,用于从废水中回收氨.
- 这项技术为从稀释水流中回收资源提供了一个有吸引力的解决方案.
- 该ECM的性能表明其在废水处理和氨回收工业应用的潜力.
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