Synthesis of strongly magnetic biochar via oxidative hydrolysis of FeCl2.
Saturation magnetisation of magnetic pine sawdust biochar (MPSB) is 47.8 A m2/kg.
Single-phase iron oxide (Fe3O4) nanoparticles formed on the surface of biochar.
Adsorption behaviour and regeneration were investigated.
Sorption of sulfamethoxazole onto MPSB could be due to hydrophobic interaction.