Intensive investigation of the synergistic effects between electrocatalysis and peroxymonosulfate activation for efficient organic elimination,Journal of Hazardous Materials

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Intensive investigation of the synergistic effects between electrocatalysis and peroxymonosulfate activation for efficient organic elimination
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-09-04 , DOI: 10.1016/j.jhazmat.2024.135719
Beibei Gao ₁ , Jin Tan ₁ , Rongzhong Wang ₁ , Qingming Zeng ₁ , Yanjun Wen ₁ , Qingyan Zhang ₁ , Jiachen Wang ₁ , Qingyi Zeng ₁

Affiliation

Hybrid systems combined eletrocatalysis and Fenton-like process attract a lot of attention due their outstanding performance and unique mechanism. Here, we proposed an efficient, cost-effective, and versatile electrochemical activation (ECA) system for efficient water purification, and intensively studied the synergistic effects between electrocatalysis and peroxymonosulfate (PMS)-based advanced oxidation. The ECA system achieved complete removal of 20 ppm tetracycline hydrochloride (TCH) in 15 min, with a rate constant of 0.338 min−1. Its performance was assessed across various operational parameters (PMS dosage, pH, applied voltage, electrode interval, temperature, co-existed ions, biomass, different oxidants), demonstrating its broad applicability and stability. Excellent degradation and mineralization for other 12 kinds of refractory organic pollutants were also achieved. The outstanding performance can be attributed to the synergistic effect in the system, in which electrocatalytic reduction of dissolved oxygen generated H2O2 and O2•-, boosting the number of reactive species, such as 1O2, by interacting with PMS. Furthermore, the presence of organic matter promotes electron transfer, amplifying the system's degradation capability. These findings not only highlight the ECA system's effectiveness in organic pollutant removal but also offer insights into the underlying degradation mechanisms, paving the way for future advancements in water purification technologies.

中文翻译：

深入研究电催化和过氧一硫酸盐活化之间的协同作用，以实现高效有机物消除

电催化和 Fenton 类工艺相结合的混合动力系统因其出色的性能和独特的机理而备受关注。在这里，我们提出了一种高效、经济高效且多功能的电化学活化（ECA）系统，用于高效净化水，并深入研究了电催化和基于过氧一硫酸盐（PMS）的高级氧化之间的协同效应。ECA 系统在 15 分钟内完全去除了 20 ppm 盐酸四环素（TCH），速率常数为 0.338 min-1。根据各种操作参数（PMS 剂量、pH 值、外加电压、电极间隔、温度、共存离子、生物质、不同氧化剂）评估其性能，证明了其广泛的适用性和稳定性。对其他 12 种难降解有机污染物也取得了优异的降解和矿化作用。出色的性能可归因于系统中的协同效应，其中溶解氧的电催化还原产生 H2O2 和 O2•-，通过与 PMS 相互作用增加反应性物质（如 1O2）的数量。此外，有机物的存在促进了电子转移，放大了系统的降解能力。这些发现不仅突出了 ECA 系统在去除有机污染物方面的有效性，而且还为潜在的降解机制提供了见解，为水净化技术的未来发展铺平了道路。

更新日期：2024-09-04

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