| Adsorption characteristics of nitrobenzene in different type soils were assessed with batch equilibrium experiments in order to evaluate the environmental behaviors and provide foundation for pollution control by nitrobenzene. The results showed that the adsorption can be divided roughly into three phases, namely, high-speed adsorption, deceleration adsorption and balance adsorption.Adsorption isotherms were fitted to the Langmuir and Freundlich models (P<0.05). Investigation into the physiochemical properties of soils and the adsorption coefficients (K) indicated that the adsorption ability of red soil was lower than that of brown soil. According to Langmuir isotherm adsorption equation, the saturated adsorption capacities of brown soil with different contents of organic matter (16.33g/kg and 11.15 g/kg) were 200 μg/g and 142 μg/g, respectively. The adsorption ability of soil to nitrobenzene augments with increasing contents of organic matter, which may help to reduce the activity and toxicity of nitrobenzene in soils. |
