PREPARATION OF THIOUREA MODIFIED BIOCHAR AND THE ADSORPTION BEHAVIOR OF NORFLOXACIN

An efficient adsorption material-thiourea modified bagasse biochar (TBC) was prepared using bagasse. TBC was characterized by scanning electron microscopy coupled to EDS (SEM-EDS), Fourier transform infrared (FTIR), Brunauer-Emmett-Teller (BET) and X-ray diffractometer (XRD). Furthermore, TBC adsorption performance was researched, using norfloxacin (NOR) as target pollutant. In this research, different influencing factors were studied, such as the solution pH, contact time, initial NOR concentration and the adsorbent dosage. In addition, the adsorption isotherms could be described well with Langmuir model, with the maximum NOR adsorption capacity of 193.19 mg.L-1. The kinetics data revealed that the adsorption of NOR on TBC conformed to the pseudo-second-order. Based on the results, the adsorption process was monomolecular chemical adsorption.