An adsorption and thermodynamic study of ofloxacin on marine sediments

Environmental context Ofloxacin, a widely used fluorinated antibiotic, is resistant to biodegradation and hence can accumulate in the environment. A systematic investigation of ofloxacin on marine sediments showed that sediment organic carbon and heterogeneous sites on sediments play important roles in adsorption processes. The results help our understanding of the environmental behaviour and fate of ofloxacin in marine systems. Abstract The adsorption behaviour of ofloxacin (OFL) on marine sediments treated by different methods was investigated using batch experiments. Three factors (sediment organic carbon content, salinity and temperature) that may affect the adsorption behaviour of OFL were analysed. The equilibrium time for OFL adsorption on marine sediment in natural seawater was ~4–5h. The adsorption of OFL on all sediments with different treatments fitted the Freundlich model well. The adsorption parameter Kf value was in the order of Kf (H2O2 treatment)

Keywords:

• Inorganic chemistry
• Chemistry
• Total organic carbon
• Adsorption
• Gibbs free energy
• Freundlich equation
• Salinity
• Sediment
• Seawater
• Temperature salinity diagrams
• Environmental chemistry
• Biodegradation
• Enthalpy

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