Texture and sorptive properties of the active carbon, before and after impregnation with the solution of Cr, Cu, and Ag salts, were investigated. Initial active carbon and the impregnated one were separately subjected to abrasion in a spouted bed, thus obtaining core samples with different degrees of external layers removed. They were analyzed by means of densimetry, mercury porosimetry, and adsorption techniques. The pore volume was determined from measurements of true and real densities. Mercury porosimetry was used to estimate volume pores in the macropore range. Mesopore and micropore structures were determined using benzene adsorption/desorption isotherms. Both the active carbon and impregnated active carbon showed radial changes in the micro-, meso-, and macropore structure. For impregnated active carbon samples the amount of deposited material and sorption of ClCN were measured. The outer regions of particles were richer in active material whose distribution was analyzed. Samples with removed external layers exhibited substantially higher protective efficiency against cyanogen chloride.