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[Radiolytic Decomposition of Ciprofloxacin Hydrochloride in Aqueous Solution Using γ Irradiation]
Abstract:
Effects of initial concentrations, pH values, different additives and composite pollutants on ciprofloxacin hydrochloride removal using γ irradiation were investigated. The experiments results showed γ irradiation could effectively remove ciprofloxacin hydrochloride; low initial concentration and strongly acidic condition were favorable for CIP removal using γ irradiation; the degradation of CIP was inhibited upon the addition of CO3(2-) and methanol, which indicated that the degradation of CIP might be mainly ascribed to *OH oxidation and the direct decomposition of CIP molecules induced by irradiation. BrO3- showed a synergistic effect with CIP in degradation of the composite pollutants when mixed together with CIP for γ irradiation, and the removal rates of both pollutants were improved. At an absorbed dose of 400 Gy, the removal rates of CIP and BrO3- were increased by 18.74% and 1.81%, respectively. The removal rates of TOC and COD were 15.22% and 61.44%, respectively, when the 100 mg x L(-1) CIP was degraded by γ irradiation at the absorbed dose of 6 000 Gy.
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