Performance of biological activated carbon treating norfloxacin from aqueous solutions

摘要

Norfloxacin (Nor) as a common representative of antibiotics was examined for its degradation by Biological Activated Carbon (BAC). The objectives of this study are to show the performance of BAC process treating Nor from aqueous solutions. The adsorption and biodegradation in BAC reactor (BAC column A) and the other reactor with new carbon, not inoculated (BAC column B) were carried out. The results showed that immediate breakthrough of norfloxacin (Nor) is observed in the effluent of BAC column B. The Nor removal efficiencies increase with hydraulic retention time in BAC column A. When hydraulic retention time is 2 h, Nor removal efficiency reached 77.26%. FTIR results indicate that the benzene ligand of Nor has been destructed and produced free-OH group, the stretch of O-H and N-H decrease with the peaks at 3000-3500 cm~(-1) shifting to 3500-3600 cm~(-1). Biodegradation can play the leading pole for Nor removal in BAC reactors.