Catalytic degradation of diclofenac by ZnO-Co3O4: identification of major intermediates and degradation pathway.

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES Environmental Science and Pollution Research Pub Date : 2025-01-03 DOI:10.1007/s11356-024-35713-5
Soumia Fergani, Hanane Zazoua, Adel Saadi, Fatma Zohra Badri, Amel Boudjemaa, Khaldoun Bachari
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引用次数: 0

Abstract

ZnO-Co3O4 material was successfully synthesized by the co-precipitation method and used as a catalyst for the removal of diclofenac sodium (DCF). ZnO-Co3O4 exhibited higher catalytic activity in the catalytic process compared to the photocatalytic processes. Under optimum conditions, the activation of peroxymonosulfate (PMS) by ZnO-Co3O4 achieved approximately 99% removal of DCF, confirming the effective adsorption and activation of PMS. Quenching experiments indicated that the reactive oxygen species (ROS) responsible for the degradation of DCF by the ZnO-Co3O4/PMS system are singlet oxygen (1O2) and superoxide radicals (O2•-). The activation of PMS by ZnO-Co3O4 was associated with the coexistence and interaction between Co(II) and Co(III), as well as the formation of oxygen vacancies (V0) in ZnO. Cobalt leaching was negligible, and the degradation rate remained constant after four cycles, indicating the excellent stability and reusability of the ZnO-Co₃O₄ catalyst. Additionally, eight degradation products of DCF were identified by LC-ESI-MS, and their toxicity was evaluated using ECOSAR software (version 2.2). In conclusion, the ZnO-Co3O4/PMS system is a promising catalytic process for the degradation of organic molecules.

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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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