Enhancement of catalytic degradation of amoxicillin in aqueous solution using clay supported bimetallic Fe/Ni nanoparticles

• Published in: Chemosphere (Oxford) Vol. 103; pp. 80 - 85
• Main Authors: Weng, Xiulan, Sun, Qian, Lin, Shen, Chen, Zuliang, Megharaj, Mallavarapu, Naidu, Ravendra
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-05-2014; Elsevier
• Subjects: Aluminum Silicates - chemistry; Amoxicillin; Amoxicillin - chemistry; Anti-Bacterial Agents - chemistry; Applied sciences; Bentonite; Bentonite - chemistry; Bimetallic Fe/Ni; Catalysis; Degradation; Drinking water and swimming-pool water. Desalination; Environmental Restoration and Remediation - methods; Exact sciences and technology; Iron - chemistry; Metal Nanoparticles - chemistry; Microscopy, Electron, Scanning; Nanoparticles; Nickel - chemistry; Pollution; Water Pollutants, Chemical - chemistry; Water Purification - methods; Water treatment and pollution; X-Ray Diffraction; Nanoparticles; Degradation; Bentonite; Bimetallic Fe/Ni; Amoxicillin; Water treatment; Nanoparticle; Lactam; Iron alloy; Supported catalyst; Surface structure; Penicillin derivatives; Reaction mechanism; Nickel alloy; Organic compounds; Binary alloy; Drug; Clay; Scanning electron microscopy; Catalytic reaction; Transition metal; Chemical degradation; Metal particle; Antibiotic; Morphology; Emerging pollutant; Kinetics; Aqueous solution; Antibacterial agent; Nanostructured materials; Degradation product
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2013.11.033

•Amoxicillin in aqueous solution was degraded using B–Fe/Ni.•More than 93.67% of AMX was removed only 60min.•B–Fe/Ni were used for characterization.•The degradation mechanism of amoxicillin was proposed.
Despite bimetallic Fe/Ni nanoparticles have been extensively used to remediate groundwater, they have not been used for the catalytic degradation of amoxicillin (AMX). In this study, bentonite-supported bimetallic Fe/Ni (B–Fe/Ni) nanoparticles were used to degrade AMX in aqueous solution. More than 94% of AMX was removed using B–Fe/Ni, while only 84% was removed by Fe/Ni at an initial concentration of 60mgL−1 within 60min due to bentonite serving as the support mechanism, leading to a decrease in aggregation of Fe/Ni nanoparticles, which was confirmed by scanning electron microscopy (SEM). The formation of iron oxides in the B–Fe/Ni after reaction with AMX was confirmed by X-ray diffraction (XRD). The main factors controlling the degradation of AMX such as the initial pH of the solution, dosage of B–Fe/Ni, initial AMX concentration, and the reaction temperature were discussed. The possible degradation mechanism was proposed, which was based on the analysis of degraded products by liquid chromatography-mass spectrometry (LC–MS).