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HYDROXYL RADICAL BASED DEGRADATION OF CIPROFLOXACIN IN AQUEOUS SOLUTION

2016; Sociedad Chilena de Química; Volume: 61; Issue: 2 Linguagem: Inglês

10.4067/s0717-97072016000200019

0717-9707

Murtaza Sayed, Luqman Ali Shah, Javed Ali Khan, Noor S. Shah, Hasan M. Khan, Rafaqat Ali Khan, Abdur Rahman Khan, Asad Muhammad Khan,

Electrochemical Analysis and Applications

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 N 2 , N 2 O or air on CIP degradation were also studied.The influence of various radical scavengers like tert-butanol, isopropanol, HCO 3 -, CO 3 2-, NO 3 -and NO 2 -as radical scavengers in N 2 -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 -, CH 3 COO -and HCOO -were formed as a result of CIP degradation that were analyzed by ion-chromatography.