Abstract: Under variable adsorbing conditions, the same adsorbent possesses differentadsorption performances and sometimes the differences are even rather large. Inthis paper, the effects of the concentration of adsorbent, the relative humidity,the velocity of gaseous stream, the adsorption temperature, the height of adsorp-tion bed, the irradiation dose and the diameter of adsorbent particle on the per-formances of adsorption of I_2 by apricot-pit charcoal and adsorption of CH_3I byTEDA-impregnated apricot-pit charcoal are studied, and the relevant curves given.