Proposed a method of utilizing of agricultural wastes, particularly rice husk and straw into activated carbon. Carbonization of rice husks and straws was carried out in a tubular furnace made of stainless steel 250 mm in height and 25 mm in internal diameter at a rate of temperature rise of 10 ° C per minute up to 500 ° C and holding at this temperature for 100 minutes. The yield of carbonizate from rice husks and straw is 44 and 37%, accordingly. Activation of the carbonized product was carried out at a temperature of 800 ° C in water vapor. The yield of activated carbon obtained from husks is 27%, of straw 29% based on the weight of the raw material. Activated carbon obtained from husks has the following properties: iodine adsorption activity – 51%, total pore volume over water – 1.57 cm3 / g, moisture content – 3.6%, bulk density – 236.1 g / dm3. Properties of activated carbon obtained from straw: 64% iodine adsorption activity, total water pore volume – 1.63 cm3 / g, moisture content – 3.6%, bulk density – 181.3 g / dm3. Ac- cording to the results of experimental studies, activated charcoal obtained from rice husks corresponds to the WAC brand, activated charcoal obtained from rice straw corresponds to BAU-A grade.
Keywords: carbonization, rice husk and straw, activating of carbonizate, sorbent, activated carbon.
