JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 61 No 2 (2016): Journal of the Chilean Chemical Society
Original Research Papers

HYDROXYL RADICAL BASED DEGRADATION OF CIPROFLOXACIN IN AQUEOUS SOLUTION

Murtaza Sayed
Department of Chemistry, COMSATS Institute of Information Technology, Abbotabad, 22060 Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar
Luqman Ali Shah
Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar
Javed Ali Khan
Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar
Noor Samad Shah
Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar Department of Environmental sciences, COMSATS Institute of Information Technology, Vehari, 61100
Hasan M. Khan
Radiation Chemistry Laboratory, National Centre of Excellence in Physical Chemistry, University of Peshawar, 25120, Peshawar
Rafaqat Ali Khan
Department of Chemistry, COMSATS Institute of Information Technology, Abbotabad, 22060
Abdur Rahman Khan
Department of Chemistry, COMSATS Institute of Information Technology, Abbotabad, 22060
Asad M. Khan
Department of Chemistry, COMSATS Institute of Information Technology, Abbotabad, 22060
Vol 61, No 2 (2016): Journal of the Chilean Chemical Society
Published June 10, 2016
Keywords
  • Hydroxyl radical,
  • Ciprofloxacin,
  • Degradation,
  • Gamma-irradiation,
  • Kinetics
How to Cite
Sayed, M., Ali Shah, L., Ali Khan, J., Samad Shah, N., Khan, H. M., Ali Khan, R., Rahman Khan, A., & Khan, A. M. (2016). HYDROXYL RADICAL BASED DEGRADATION OF CIPROFLOXACIN IN AQUEOUS SOLUTION. Journal of the Chilean Chemical Society, 61(2). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/20

Abstract

This study reports the degradation of ciprofloxacin (CIP) by means of ionizing radiations. Kinetic studies with aqueous concentrations of 4.6, 10, 15, 17.9 mg/L reveals that degradation of CIP follows pseudo-first order kinetics and the decay constant increased with decrease in initial concentration of CIP. The removal efficiency, represented by G-value, decreased with increasing absorbed dose and increased with higher [CIP]0 concentration at a given absorbed dose. The effects of bubbling CIP solution with N2, N2O or air on CIP degradation were also studied. The influence of various radical scavengers like tert-butanol, iso-propanol, HCO3-, CO32- , NO3- and NO2- as radical scavengers in N2- saturated solutions of CIP indicated that •OH were more closely associated with the radiolytic decomposition of CIP than other radicals, such as e-aq or •H. The pH value of aqueous media played a crucial role in the degradation of CIP. It was observed that degradation efficiency was higher under acidic condition compared to degradation in natural or alkaline media. F-, CH3COO- and HCOO- were formed as a result of CIP degradation that were analyzed by ion-chromatography.

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