Selective Metal Removal with Capacitive De-ionisation

通过电容去离子选择性金属去除

• 批准号: 2856644
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2856644
• 关键词: Selective; Metal; Removal; Capacitive; De

Capacitive deionisation (CDI) has emerged as a promising way to desalinate water, and indeed remove a range of pollutants such as heavy metals. The principle of the method is simple: a voltage is applied to high surface area electrodes, and ions are adsorbed "capacitively" on the surfaces. Modification of surface chemistry allows for ion-selectivity, through either capacitive or Faradaic effects. Although the method is believed to be comparable (in energy, and potentially, cost terms) to alternative separation methods (nano-filtration, reverse osmosis or traditional distillation), many underlying scientific questions - about the structures formed within the porous electrodes and the theoretical limits of the approach - are unanswered to date.Scientifically, the key initial task for this project will be to explore how soluble species can be removed selectively and the limits on the recovery (both high and low concentrations limits). Strategies to be pursued will involve purely capacitive metal removal, or Faradaic (electrodeposition) removal of metals, coupled with capacitive counter-ion removal. The longer-term goals will be to establish the limits of the CDI approach from a fundamental electrochemical perspective.

电容去离子（CDI）已经成为一种有前途的淡化水的方法，并且确实可以去除一系列污染物，如重金属。该方法的原理很简单：向高表面积电极施加电压，离子被“电容性”吸附在表面上。表面化学的改性允许通过电容效应或法拉第效应实现离子选择性。尽管该方法被认为具有可比性（在能源和潜在的成本方面）替代分离方法（纳米过滤、反渗透或传统蒸馏），许多潜在的科学问题-关于在多孔电极内形成的结构和该方法的理论极限-迄今为止还没有答案。该项目的主要初步任务将是探索如何有选择地去除可溶性物质以及回收的限制（高浓度和低浓度限制）。所追求的策略将涉及纯电容性金属去除，或金属的法拉第（电沉积）去除，与电容性反离子去除相结合。长期目标是从基本电化学角度确定CDI方法的极限。