Publication Date:
2024-05-27
Description:
first_page settings Order Article Reprints Open AccessFeature PaperArticle Assessing the Efficacy of A Mo2C/Peroxydisulfate System for Tertiary Wastewater Treatment: A Study of Losartan Degradation, E. coli Inactivation, and Synergistic Effects by Alexandra A. Ioannidi 1, Maria Vlachodimitropoulou 1 [ORCID] , Zacharias Frontistis 2 [ORCID] , Athanasia Petala 3, Eleni Koutra 1, Michael Kornaros 1 [ORCID] and Dionissios Mantzavinos 1,* [ORCID] 1 Department of Chemical Engineering, University of Patras, GR-26504 Patras, Greece 2 Department of Chemical Engineering, University of Western Macedonia, GR-50132 Kozani, Greece 3 Department of Environment, Ionian University, GR-29100 Zakynthos, Greece * Author to whom correspondence should be addressed. Catalysts 2023, 13(9), 1285; https://doi.org/10.3390/catal13091285 Submission received: 9 August 2023 / Revised: 3 September 2023 / Accepted: 6 September 2023 / Published: 8 September 2023 (This article belongs to the Special Issue Environmental Catalysis in Advanced Oxidation Processes, 2nd Edition) Download keyboard_arrow_down Browse Figures Versions Notes Abstract This work examines the use of pristine Mo2C as an intriguing sodium persulfate (SPS) activator for the degradation of the drug losartan (LOS). Using 500 mg/L Mo2C and 250 mg/L SPS, 500 μg/L LOS was degraded in less than 45 min. LOS decomposition was enhanced in acidic pH, while the apparent kinetic constant decreased with higher LOS concentrations. According to experiments conducted in the presence of scavengers of reactive species, sulfate radicals, hydroxyl radicals, and singlet oxygen participated in LOS oxidation, with the latter being the predominant reactive species. The presence of competitors such as bicarbonate and organic matter reduced the observed efficiency in actual matrices, while, interestingly, the addition of chloride accelerated the degradation rate. The catalyst showed remarkable stability, with complete LOS removal being retained after five sequential experiments. The system was examined for simultaneous LOS decomposition and elimination of Escherichia coli. The presence of E. coli retarded LOS destruction, resulting in only 30% removal after 3 h, while the system was capable of reducing E. coli concentration by 1.23 log. However, in the presence of simulated solar irradiation, E. coli was reduced by almost 4 log and LOS was completely degraded in 45 min, revealing a significant synergistic effect of the solar/Mo2C/SPS system.
Type:
info:eu-repo/semantics/article
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