Capacitive deionization (CDI) is an emerging electrochemical-based adsorption system that has a high capability for the water reclamation with future potential towards an energy-efficient and cost-effective technique for industrial implementations. However, the higher cost of electrodes and poor performance limit its scale-up, and there is a need to focus on a cost-effective electrode towards economic impacts. Among the various waste resources, plastic sources would be the better precursor for carbonization as the plastic-derived carbon possess enhanced surface properties and high electrochemical stability. Further, the carbonization of plastic products towards electrode minimizes greenhouse gas emissions, maintains environmental sustainability and achieves a dual benefit of circular economy with water reclamation. This paper highlights the overview of CDI, the significance of electrodes in CDI for electrosorption studies, various synthetic routes of plastic-derived carbon, and its properties that help the researchers to focus on zero waste discharge-based CDI process.

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关于从塑料废物中开发功能性碳电极用于电容去离子以实现可持续水回收的见解

电容去离子 (CDI) 是一种新兴的基于电化学的吸附系统，具有很强的水回收能力，未来有望成为一种节能且经济高效的工业实施技术。然而，电极成本较高且性能较差限制了其规模化，因此需要关注具有成本效益的电极以产生经济影响。在各种废弃资源中，塑料源将是更好的碳化前体，因为塑料衍生的碳具有增强的表面性能和高电化学稳定性。此外，塑料制品向电极的碳化可最大限度地减少温室气体排放，保持环境可持续性，并实现循环经济和水回收的双重效益。本文重点介绍了 CDI 的概述、CDI 电极对电吸附研究的重要性、塑料衍生碳的各种合成路线及其有助于研究人员专注于基于零废物排放的 CDI 工艺的特性。