抄録
In the study of mercury removal from a substitute condensate of diphenylmercury contaminated in n-heptane on 3A, 4A, 5A, NaX and NaY zeolites and activated carbon was carried out in batch and continuous operations. In a batch adsorption system, the adsorption characteristics such as pore size effect and adsorption isotherm revealed that the diphenylmercury molecules can penetrate into the supercage of the NaX and NaY zeolites but only partially of the 5A zeolite, and a bi-Langmuir model can fit well with the experimental data. The adsorption of the diphenylmercury occurs only on the external surfaces of the 3A and 4A zeolites. In the kinetic study of the adsorption at 25°C, very low diffusivity constants indicate the limitation of diphenylmercury molecule adsorption. In a continuous adsorption system, the results of diphenylmercury adsorption on NaX and NaY zeolites revealed that the adsorption mechanism is chemisorption rather than physisorption.
