GRANULATED ADSORBENTS BASED ON VEGETABLE RAW MATERIALS FOR EXTRACTION OF GOLD AND SILVER FROM ACID SOLUTIONS
The purpose of the present work was to develop basic principles of sorbents synthesis from modified cellulose and to reveal the possibility of using the obtained materials for adsorption of gold and silver from acid solutions in gold mining industry. The paper includes investigations of sorption properties for materials containing modified cellulose. Granulated materials were prepared from cellulose by means of cellulose activation, chemical modifica­tion, dissolution and extrusion followed by solidification of the formed granules. Sorption capacity of the obtained materials was evaluated after extraction of gold and silver from acid solutions. Results of X-ray analysis showed that the highest intensity of analytical response was recorded for materials modified with cotton cellulose and sul­fite unbleached cellulose. Results of surface spectral analysis showed that silver had been completely adsorbed by sorption materials from solution as well.