Abstract: A batch sorption study was carried out to investigate the properties,kinetics and thermodynamics of the sorption process of nitrobenzene onto the biological carbon sorbent prepared by wheat straw at 300 ℃.The results showed that the sorption process followed the pseudo-second order kinetic equation,and the activation energy was 12.2 kJ/mol.The adsorption behavior fitted well to the Freundlich sorption isotherm equation,and the maximum sorption capacity was 91.58 mg/g.The results of thermodynamic analysis were as follows:enthalpy(ΔH)<0,Gibbs free energy(ΔG)<0,and entropy(ΔS)>0,which suggested that the sorption of nitrobenzene onto the biological carbon sorbent was an exothermic,spontaneous and decreasing entropy process.