化学
激进的
催化作用
吸附
硫酸盐
比表面积
水溶液中的金属离子
降级(电信)
羟基自由基
复合数
无机化学
过渡金属
金属
化学工程
有机化学
材料科学
工程类
复合材料
电信
计算机科学
作者
Zhiming Sun,Xiaorui Liu,Xiongbo Dong,Xiangwei Zhang,Ye Tan,Fang Yuan,Shuilin Zheng,Chunquan Li
出处
期刊:Chemosphere
[Elsevier]
日期:2021-01-01
卷期号:263: 127965-127965
被引量:83
标识
DOI:10.1016/j.chemosphere.2020.127965
摘要
Developing low-cost, high-efficiency catalysts for advanced oxidation processes remain a key issue for the degradation of organic pollutants. In this study, a novel FeCo2O4/rectorite composite was synthesized via a facile combustion process and employed to activate peroxymonosulfate (PMS) for dealing with atrazine (ATZ). The addition of rectorite could result in higher specific surface area, smaller pore size and more hydroxyl groups, which were beneficial to enrich pollutants to the adsorption sites and provide sufficient reactive sites. After meticulous evaluation, the degradation efficiency of FeCo2O4/rectorite composite towards ATZ exhibited improved PMS activation efficiency which was about 2.6 times than that of pure FeCo2O4. Based on the characterization results, the sulfate radicals and hydroxyl radicals were considered to be the main free radicals which were involved into the circulation of Co(II)–Co(III)–Co(II) as well as the oxidation of ≡Fe(II), which was responsible for the remarkable catalytic efficiency. In addition, the chemical stability and superior catalytic performance of FeCo2O4/rectorite should also be attributed to the chemical combination between metal ions and the surface hydroxyl groups of rectorite. Overall, these findings are beneficial for understanding the mechanism of PMS activation by natural mineral-based catalysts and contributing to the practical application of sulfate-based technology for organic wastewater treatment.
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