Materials Based on Co, Cu, and Cr as Activators of PMS for Degrading a Representative Antibiotic: The Strategy for Utilization in Water Treatment and Warnings on Metal Leaching

A chromate of copper and cobalt (Φy) was synthesized and characterized. Φy activated peroxymonosulfate (PMS) to degrade ciprofloxacin (CIP) in water. The Φy/PMS combination showed a high degrading capability toward CIP (~100% elimination in 15 min). However, Φy leached cobalt (1.6 mg L−1), limiting its use for water treatment. To avoid leaching, Φy was calcinated, forming a mixed metal oxide (MMO). In the combination of MMO/PMS, no metals leached, the CIP adsorption was low (<20%), and the action of SO4•− dominated, leading to a synergistic effect on pollutant elimination (>95% after 15 min of treatment). MMO/PMS promoted the opening and oxidation of the piperazyl ring, plus the hydroxylation of the quinolone moiety on CIP, which potentially decreased the biological activity. After three reuse cycles, the MMO still presented with a high activation of PMS toward CIP degradation (90% in 15 min of action). Additionally, the CIP degradation by the MMO/PMS system in simulated hospital wastewater was close to that obtained in distilled water. This work provides relevant information on the stability of Co-, Cu-, and Cr-based materials under interaction with PMS and the strategies to obtain a proper catalyst to degrade CIP.

• Autores: Serna Galvis, Efraím Adolfo; Mendoza Merlano, Carlos Javier; Torres Palma, Ricardo Antonio; Echavarría Isaza, Adriana; Hoyos Ayala, Dora Ángela
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2023
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/46077
• Acceso en línea: https://hdl.handle.net/10495/46077
• Palabra clave: Scanning electron microscopes; Oxidación; Oxidation; Antibacterianos - farmacología; Anti-Bacterial Agents - pharmacology; Ciprofloxacina - farmacología; Ciprofloxacin - pharmacology; Cobalt; Cobre; Copper; Peróxidos; Peroxides; Contaminantes Químicos del Agua - análisis; Water Pollutants, Chemical - analysis; Water treatment; Tratamiento del agua; Scanning electron microscopy; Microscopía electrónica de barrido; Metals; Metal; Chromate of copper and cobalt; http://aims.fao.org/aos/agrovoc/c_ef195799; http://aims.fao.org/aos/agrovoc/c_a87b3af2; http://aims.fao.org/aos/agrovoc/c_29036; http://id.loc.gov/authorities/subjects/sh85117990; https://id.nlm.nih.gov/mesh/D000900; https://id.nlm.nih.gov/mesh/D002939; https://id.nlm.nih.gov/mesh/D003035; https://id.nlm.nih.gov/mesh/D003300; https://id.nlm.nih.gov/mesh/D010545; https://id.nlm.nih.gov/mesh/D014874; ODS 6: Agua limpia y saneamiento. Garantizar la disponibilidad y la gestión sostenible del agua y el saneamiento para todos
• Rights: openAccess
• License: http://creativecommons.org/licenses/by/4.0/