FIELD: chemistry.
SUBSTANCE: wastes from rice production in the form of rice husk are processed with 1 n. solution of an alkali at 50-95°C for 30-90 min. Then the alkaline extract is separated and concentrated mineral acid is added to it to the pH value of 4.0-6.0. The precipitated sediment is separated from solution, washed with water and dried at 90-105°C.
EFFECT: increase of the drinking water purification degree due to the exclusion of washing out from the obtained sorbent and ingress of admixtures into water.
2 cl, 1 dwg, 2 ex
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