从盐水中通过电透析在固定电位和动态电流密度操作中去除化合物
Ramatisa Ladeia Ramos1, Shahram Shirdast2, Mehran Aliaskari1
1Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen 76344, Germany.
Water research
|December 22, 2023
概括
电透析 (ED) 有效地从水中去除化合物,即使度和pH值不同. 这项研究优化了ED以实现高效的海水淡化和污染物去除,突出了其生产淡水的潜力.
科学领域:
- 环境科学 环境科学
- 水处理技术水处理技术
- 化学工程是化学工程的重要组成部分.
背景情况:
- 水资源中的化合物对人类健康和生态系统构成风险.
- 盐度和pH值变化的增加挑战了传统的水处理方法.
- 需要先进的技术来同时进行海水淡化和污染物清除.
研究的目的:
- 通过电透析 (ED) 来研究从水中去除物种 (酸盐,酸盐,,) 的方法.
- 评估不同料水质量 (盐度和pH) 对ED性能的影响.
- 优化ED运行参数,包括电潜和电流密度,以提高效率和能源消耗.
主要方法:
- 电透析 (ED) 实验是在控制盐度 (0-10 g/L NaCl) 和pH (3-11) 的水样本上进行的.
- 研究的固定电位 (5-25V) 和动态电流密度 (DCD) 相对于限制电流密度 (LCD).
- 评估了去除效率,摩尔流量,特定能耗 (SEC) 和电流效率 (CE).
主要成果:
- 酸盐的去除在pH值变化中保持稳定,而酸盐和的去除受到极端pH值的影响.
- 盐度增加对化合物去除的影响很小,因为具有相似的离子特性.
- 较高的电位改善了去除和流量,但在LCD上方运行增加了能耗 (SEC).
- 动态电流密度 (DCD) 程序产生了更高的电流效率 (CE) 和更短的实验运行时间.
结论:
- 电透析 (ED) 是一种可行的技术,用于选择性去除物种和淡化水.
- 在15V (固定电位) 和0.8LCD (DCD) 时观察到最佳性能,平衡移除,流量和时间.
- 即使在具有挑战性的水条件下,ED也为生产符合质量指南的淡水提供了强大的解决方案.
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