The effects of impregnating conditions

including pH

temperature and concentration of impregnating solution on the adsorption capacities of Pd(Ⅱ）and Mn(Ⅱ）over γ-alumina-coated cordierite honeycomb under excessive impregnation were studied.The solution fill-in time， capillary permeation time

solute diffusion time in solvent within honeycomb channel

diffusion impregnation time in pores of γ-Al2O3 and metal ion adsorption time were calculated respectively.The results revealed that the impregnation of Pd(Ⅱ）and Mn(Ⅱ）on the monolithic support was kinetically controlled.The adsorption kinetic curves of different concentrations of impregnating solution were simulated with both Lagergren first order and second order models.The results showed that Lagergren second order model fitted more properly with both Pd(Ⅱ）and Mn(Ⅱ）adsorption curves than Lagergren first order model.The adsorption isotherms were also been analyzed by using Langmuir and Freundlich models respectively.It could be concluded that the adsorption of both Pd(Ⅱ）and Mn(FONT-SIZE: 10.5pt

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mso-hansi-font-family: Times New Roman">整体结构催化剂；浸渍；金属离子；吸附速率；吸附等温线