关键词: 活性炭, 吸附, 表面化学, 吸附热力学, 二甲基二硫醚

Abstract: Activated carbons of coconut shell were tested as adsorbents of removing dimethyl disulfide and the effects of surface chemistry and pore structure on the adsorptions were investigated. Chemical hardness was computed to interpret the effect of surface chemistry on the adsorptions by Hard and Soft Acids and Bases （HSAB） theory. Moreover the thermodynamic property of the adsorptions was studied. The results show that the number of acid oxygen functional groups has little influence on the adsorptions due to the similar chemical hardness among compounds in sulfate turpentine. However specific surface area and pore volume have great impact on the adsorption. The adsorption isotherms of dimethyl disulfide on the activated carbons fit the Freundlich model and equation satisfactorily. And the result of adsorption thermodynamics shows that the adsorption of dimethyl disulfide on activated carbon is an exothermic，low-disordered and spontaneous process.

Key words: activated carbon, adsorption, surface chemistry, adsorption thermodynamics, dimethyl disulfide