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

Water Environ Res. 2016 Nov 1;88(11):2121-2131. doi: 10.2175/106143016X14733681695447.

Abstract

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)].

MeSH terms

  • 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*

Substances

  • Anti-Bacterial Agents
  • Azithromycin
  • Hydrogen Peroxide
  • Iron
  • Clarithromycin