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Assessment of Reaction Intermediates of Gamma Radiation-induced Degradation of Ofloxacin in Aqueous Solution by Changotra, Rahil; Guin, Jhimli Paul; Varshney, Lalit; Dhir, Amit is a Environmental Science article available to read on EtoBox.

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Gamma radiolytic degradation of an antibiotic, ofloxacin (OFX) was investigated under different experimental conditions. The parameters such as initial OFX concentration, solution pH, absorbed dose and the concentrations of inorganic (CO) and organic (t-BuOH) additives were optimized to achieve the efficient degradation of OFX. The degradation dose constant values of OFX were calculated as 2.364, 1.159, 0.776 and 0.618 kGy for the initial OFX concentrations of 0.05, 0.1, 0.15 and 0.2 mM with their corresponding (G (-OFX)) values of 0.481, 0.684, 1.755 and 1.971, respectively. Degradation rate of OFX was significantly increased with increase in the absorbed dose and decrease in the initial OFX concentration under acidic condition when compared to neutral or alkaline condition. Reaction of OFX in the presence of CO and t-BuOH showed that the degradation was primarily caused by the reaction of OFX with radiolytically generated reactive hydroxyl radicals. Mineralization extent of OFX was determined in terms of percentage reduction in total organic carbon (TOC) and results revealed that the addition of HO enhanced the mineralization of OFX from 29% to 36.1% with HO dose of 0.5 mM at an

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Author

Changotra, Rahil; Guin, Jhimli Paul; Varshney, Lalit; Dhir, Amit

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0045-6535)

Published

2018

Language

EN

Field

Environmental Science (Physical Sciences)