Co-Bi/GAC 粒子电极对 1,4-dioxane 的电催化降解。

IF 2.5 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
Water Science and Technology Pub Date : 2024-08-01 Epub Date: 2024-08-12 DOI:10.2166/wst.2024.274
Rui Wang, Zhineng Dai, Wenqi Zhang, Chao Ma
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引用次数: 0

摘要

有效降解工业有机废水已成为一个重要的环境问题。电化学氧化技术具有很强的催化降解能力,因此前景广阔。本研究制备了 Co-Bi/GAC 粒子电极,并对其进行了表征,用于降解 1,4-二恶烷。采用响应面法(RSM)对电化学过程参数进行了优化,并考察了水质因素对 1,4-二恶烷去除率的影响。结果表明,主要影响因素是 Co/Bi 质量比和煅烧温度。载体金属 Co 和 Bi 主要以 Co3O4 和 Bi2O3 的形式存在于 GAC 表面。1,4-dioxane 的去除主要是通过电极吸附、阳极氧化和颗粒电极氧化的协同反应实现的,其中 -OH 作为主要的活性自由基发挥了重要作用。此外,颗粒电极在不同的酸碱条件(pH=3、5、7、9 和 11)下都得到了验证。然而,高浓度的 Cl- 和 NO3- 可能会参与竞争反应,从而阻碍降解过程。尽管如此,颗粒电极在五个周期后仍表现出良好的稳定性。这些结果为构建高效、稳定的三维(3D)电催化颗粒电极以去除复杂的工业废水提供了新的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The electrocatalytic degradation of 1,4-dioxane by Co-Bi/GAC particle electrode.

Efficient degradation of industrial organic wastewater has become a significant environmental concern. Electrochemical oxidation technology is promising due to its high catalytic degradation ability. In this study, Co-Bi/GAC particle electrodes were prepared and characterized for degradation of 1,4-dioxane. The electrochemical process parameters were optimized by response surface methodology (RSM), and the influence of water quality factors on the removal rate of 1,4-dioxane was investigated. The results showed that the main influencing factors were the Co/Bi mass ratio and calcination temperature. The carrier metals, Co and Bi, existed mainly on the GAC surface as Co3O4 and Bi2O3. The removal of 1,4-dioxane was predominantly achieved through the synergistic reaction of electrode adsorption, anodic oxidation, and particle electrode oxidation, with ·OH playing a significant role as the main active free radical. Furthermore, the particle electrode was demonstrated in different acid-base conditions (pH = 3, 5, 7, 9, and 11). However, high concentrations of Cl- and NO3- hindered the degradation process, potentially participating in competitive reactions. Despite this, the particle electrode exhibited good stability after five cycles. The results provide a new perspective for constructing efficient and stable three-dimensional (3D) electrocatalytic particle electrodes to remove complex industrial wastewater.

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来源期刊
Water Science and Technology
Water Science and Technology 环境科学-工程:环境
CiteScore
4.90
自引率
3.70%
发文量
366
审稿时长
4.4 months
期刊介绍: Water Science and Technology publishes peer-reviewed papers on all aspects of the science and technology of water and wastewater. Papers are selected by a rigorous peer review procedure with the aim of rapid and wide dissemination of research results, development and application of new techniques, and related managerial and policy issues. Scientists, engineers, consultants, managers and policy-makers will find this journal essential as a permanent record of progress of research activities and their practical applications.
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