Pyrolysis of wheat straw for preparation of magnetic biochar for ciprofloxacin removal from wastewater and bio-oil/bio-gas analysis

The magnetic biochar is prepared for ciprofloxacin removal by adsorption, photocatalytic degradation and activation peroxodisulfate degradation. The magnetic biochar contains the ZnO, Fe 3 O 4 and FeNi with abundant pore structure, based on characterization analysis. According to Langmuir model analysis, the adsorption amount of ciprofloxacin is 505.16 mg/g. The adsorption mechanism analysis indicates that the surface functional group of magnetic biochar contributes to ciprofloxacin removal from wastewater. The magnetic biochar can be used as the photocatalyst for photocatalytic degradation of ciprofloxacin with removal of the 99.43 %. The ciprofloxacin can be also removed in the activation peroxodisulfate degradation system by reactive oxygen species. The magnetic biochar has excellent reusability in ciprofloxacin removal process. Bio-oil and bio-gas are produced by recycling of pyrolysis gas in the magnetic biochar preparation process. The bio-oil and bio-gas are rich in furfural and H 2 , respectively. Besides, the heating value of bio-gas is 12.35 MJ/Nm³.