Waste derived biochar for water purification: the roles of redox properties

Waste Disposal & Sustainable Energy Pub Date : 2024-11-13 DOI:10.1007/s42768-024-00211-4

Hanyang Sun, Tong Chen, Longjie Ji, Dejin Tian, Xiaodong Li, Chen Sun

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Abstract

Biochar, derived from the waste pyrolysis process, is a promising class of functional materials for environmental remediation owing to its large surface area, abundant surface functionalities and redox properties. This review focuses on the compositions, structures and electron transfer abilities of biochar and their roles in pollutant transformation in environmental remediation. First, the redox properties of biochar are systemically introduced, and the influencing factors are thoroughly discussed. Furthermore, biochar-involved redox reactions for pollutant reduction are distinctly classified on the basis of the different oxidants and reaction conditions. The reactive species in each system are comprehensively introduced, while the roles of biochar are adequately analyzed. This review aims to address the growing need for a comprehensive understanding of the role of biochar in pollutant transformation. Moreover, it also seeks to guide future research and the design of biochar materials for advanced water purification, highlighting the need for precise control of redox properties to achieve improved environmental outcomes.

Graphical abstract

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从废物热解过程中提取的生物炭因其较大的表面积、丰富的表面功能和氧化还原特性，成为一类很有前景的环境修复功能材料。本综述将重点介绍生物炭的组成、结构和电子传递能力，以及它们在环境修复中的污染物转化作用。首先，系统介绍了生物炭的氧化还原特性，并对其影响因素进行了深入探讨。此外，根据不同的氧化剂和反应条件，对生物炭参与的污染物还原氧化还原反应进行了分类。全面介绍了每个系统中的反应物种，并充分分析了生物炭的作用。本综述旨在满足人们对全面了解生物炭在污染物转化中的作用这一日益增长的需求。此外，它还旨在指导未来的研究和设计用于先进水净化的生物炭材料，强调需要精确控制氧化还原特性，以实现更好的环境效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Waste Disposal & Sustainable Energy

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