As it is expected, the form of chitosan is relatedto the ability to adsorb oxygen from a solution.The sorptionis the fastest on chitosan powder and slowest on chitosan beads;respectively, the maximal adsorbed amount of oxygen removedfrom solutions is the highest in the case of chitosan powder. Suchan effect of oxygen sorption is explicable by the number of surfaceactive sites, which are capable of adsorbing dissolved oxygen froma solution.