Research Center for Health, Safety and Environment, Alborz University of Medical Sciences, Karaj, Iran; Department of Environmental Health Engineering, Alborz University of Medical Sciences, Karaj, Iran.
Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran.
J Environ Manage. 2023 Sep 15;342:118242. doi: 10.1016/j.jenvman.2023.118242. Epub 2023 Jun 7.
Developing heterogeneous catalysts with high performance for peroxymonosulfate (PMS) activation to decontaminate organic pollutants from wastewater is of prominent importance. In this study, spinel cobalt ferrite (CoFeO) materials were coated on the surface of powdered activated carbon (CoFeO@PAC) via the facile co-precipitation method. The high specific surface area of PAC was beneficial for the adsorption of both bisphenol A (BP-A) and PMS molecules. The CoFeO@PAC-mediated PMS activation process under UV light could effectively eliminate 99.4% of the BP-A within 60 min of reaction. A significant synergy effect was attained between CoFeO and PAC towards PMS activation and subsequent elimination of BP-A. Comparative tests demonstrated that the heterogeneous CoFeO@PAC catalyst had a better degradation performance in comparison with its components and homogeneous catalysts (Fe, Co, and, Fe + Co ions). The formed by-products and intermediates during BP-A decontamination were evaluated using LC/MS analysis, and then a possible degradation pathway was proposed. Moreover, the prepared catalyst exhibited excellent performance in recyclability with slight leaching amounts of Co and Fe ions. A TOC conversion of 38% was obtained after five consecutive reaction cycles. It can be concluded that the PMS photo-activation process via the CoFeO@PAC catalyst can be utilized as an effective and promising method for the degradation of organic contaminants from polluted-water resources.
开发用于过一硫酸盐（PMS）活化的高性能异相催化剂以去除废水中的有机污染物具有重要意义。在这项研究中，通过简便的共沉淀法将尖晶石钴铁氧体（CoFeO）材料涂覆在粉末状活性炭（CoFeO@PAC）的表面上。PAC 的高比表面积有利于双酚 A（BP-A）和 PMS 分子的吸附。在紫外光下，CoFeO@PAC 介导的 PMS 活化过程可以在 60 分钟的反应时间内有效消除 99.4%的 BP-A。CoFeO 和 PAC 对 PMS 活化和随后的 BP-A 消除表现出显著的协同效应。对比测试表明，与组成成分和均相催化剂（Fe、Co 和 Fe+Co 离子）相比，异相 CoFeO@PAC 催化剂具有更好的降解性能。使用 LC/MS 分析评估了 BP-A 降解过程中形成的副产物和中间产物，然后提出了可能的降解途径。此外，所制备的催化剂在可重复使用性方面表现出优异的性能，Co 和 Fe 离子的浸出量很小。连续五个反应循环后，TOC 转化率达到 38%。可以得出结论，通过 CoFeO@PAC 催化剂的 PMS 光活化过程可用于有效且有前景的方法来降解受污染水资源中的有机污染物。
