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STUDY OF THE ADSORPTION PROPERTIES OF PLANT CELLULOSE WITH RESPECT TO NICKEL IONS

In this paper, we studied the sorption properties of cellulose isolated from sugar beet pulp in relation to Ni2+. Plant cellulose from sugar beet pulp was isolated by successive acid and alkaline extraction, the effectiveness of which was evaluated by infrared spectroscopy. The sorption test showed that cellulose extracted from sugar beet pulp sorbed the main amount of Ni2+ within 1 hour. The maximum sorption capacity of cellulose from beet pulp pulp was 5.01 mmol Nh2+ per 1 kg of dry cellulose from pulp beet pulp. The amount of sorbed Ni2+ depended on the initial Ni2+ concentration in the solution. The most effective recovery of Ni2+ occurred from solutions with a Ni2+ concentration no more than 23.17 μmol/l, allowing to achieve a degree of recovery of this heavy metal of 67.9%. An increase in the initial concentration of Ni2+ in the solution resulted in a reduction in the degree of recovery of this element to 18.6%, which indicates the feasibility of using cellulose from sugar beet pulp for purification of water contaminated with nickel compounds in low concentrations. Comparison of the efficiency of Ni2+ sorption at different pH values showed that this process is pH dependent and the amount of sorbed Ni2+ and the degree of recovery of Ni2+ by cellulose from sugar beet pulp increased with increasing of pH values from 3.0 to 7.0.