Unprecedented Treatment Strategy of Aquatic Environments: Oxidative Degradation of Penicillin G by Chromium Trioxide in Acidic Media and the Impact of Metal Ion Catalysts: Kinetics and Mechanistic Insights.

摘要: Degradation kinetics and pathways of the antibiotic penicillin G (Pen) have been examined via oxidation by chromium trioxide (CrVI) in aqueous sulfuric perchloric acid media. The reactions were monitored spectrophotometry at 298 K. In both acidic media, was set to proceed through catalysis. stoichiometry designated that 3 moles Pen required 2 CrVI. acids first order with regard [CrVI] less-than unity [Pen] [H+] their variation. rates displayed negligible impacts upon altering ionic strengths or dielectric constants reaction There no intrusion free radicals throughout redox reactions. Addition low concentrations Ni2+, Cu2+, Zn2+ ions enhanced rates, while addition Cr3+ as a described product did not noteworthily alter rates. Under comparable investigational circumstances, HClO4 almost 2-fold greater than H2SO4. products identified spectral analysis spot tests phenyl acetic acid, 2-formyl-5,5-dimethyl-thiazolidine-4-carboxlate ion, ammonium carbon dioxide. Reliance on temperature has explored, activation thermodynamic parameters estimated debated. view noted reactions' orders products' identification, plausible mechanism for suggested. derived rate law be accordance acquired results. This study offers an unprecedented simple low-cost treatment method removal degradation certain pollutants protecting environment human health.