FIELD: chemical and pharmaceutical industry. SUBSTANCE: method involves drying wastes at temperature of 60-65 C with following drying at temperature of 100-105 C; grinding; separating fraction of 0.5-3 mm; rinsing in water and repeatedly drying at temperature of 100-105 C. Method allows biologically active preparations to be recovered and sorbents to be produced with following usage thereof for purifying aqueous solutions from organic dyes. EFFECT: increased efficiency in producing high-quality sorbents and simplified method. 2 ex
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