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Degradation and Biodegradability Enhancement of Chloramphenicol and Azithromycin in Aqueous Solution Using Heterogeneous Catalytic Ozonation in the Presence of Mgo Nanocrystalin Comparison With Single Ozonation



Arfaeinia H1 ; Sharafi K2, 3 ; Banafshehafshan S1 ; Hashemi SE3
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
  3. 3. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Iran

Source: International Journal of Pharmacy and Technology Published:2016

Abstract

The catalytized ozonation of antibiotic solution in the presence of Mg Onanocrystal as a catalyst was studied in a pilot scale batch reactor. The effects of various variables such as pH (3–13), reaction time, MgO dosage (0–10 g/L), and initial antibiotic concentration (0–50 mg/L) on CAP and AZM removal were investigated, and the results were compared to non-catalyzed ozonation. The optimized pH and catalyst dosage were found to be 8.5 and 6 g/L, respectively. The complete removal of CAP was found in COP at this optimum condition for an antibiotic concentration of 50 mg/L at a reaction time as little as 6 min, while the time needed to achieve the similar removal at conventional ozonation was 30 min. Moreover, the catalytized ozonation can significantly enhance the BOD5 /COD ratio from below 0.1 in untreated solution to 0.41 to 0.68 for treated solutions; therefore, antibiotic was transformed to biodegradable substances. Thus, the COP with MgOnanocrystalscanbe taken into account as an feasible and effective technique for pre-treating the antibiotic-laden solutions, allowing the final-purified of the effluent in a biological treatment plant. © 2016, International Journal of Pharmacy and Technology. All rights reserved.
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