Reduction of non-Betalactam Antibiotics COD by Combined Coagulation and Advanced Oxidation Processes

• Published in: Water environment research Vol. 88; no. 11; p. 2121
• Main Authors: Yazdanbakhsh, Ahmad Reza, Mohammadi, Amir Sheikh, Alinejad, Abdol Azim, Hassani, Ghasem, Golmohammadi, Sohrab, Mohseni, Seyed Mohsen, Sardar, Mahdieh, Sarsangi, Vali
• Format: Journal Article
• Language: English
• Published: United States 01.11.2016
• Subjects: Anti-Bacterial Agents - chemistry; Azithromycin - chemistry; Biological Oxygen Demand Analysis; Clarithromycin - chemistry; Hydrogen Peroxide; Hydrogen-Ion Concentration; Iron - chemistry; Molecular Structure; Waste Disposal, Fluid - methods
• ISSN: 1061-4303
• DOI: 10.2175/106143016X14733681695447

The present study evaluates the reduction of antibiotic COD from wastewater by combined coagulation and advanced oxidation processes (AOPS). The reduction of Azithromycin COD by combined coagulation and Fenton-like processes reached a maximum 96.9% at a reaction time of 30 min, dosage of ferric chloride 120 mg/L, dosages of Fe0 and H2O2of 0.36mM/L and 0.38 mM/L, respectively. Also, 97.9% of Clarithromycin COD reduction, was achieved at a reaction time of 30 min, dosage of ferric chloride 120 mg/L, dosages of Fe0 and H2O2 of 0.3 mM/L and 0.3mM/L, respectively. The results of kinetic studies were best fitted to the pseudo first order equation. The results showed a higher rate constant value for combined coagulation and Fenton-like processes [(kap = 0.022 min-1 and half-life time of 31.5 min for Azithromycin) and (kap = 0.023 min-1 and half-life time of 30.1 min for Clarithromycin)].