Ewa Okoniewska, Joanna Lach, Longina Stępniak, Ewa Ociepa
Technical activated carbons WG-12, ROW 08 Supra and F-300 have been modified using ultrasonic field. Firstly was examined the activated carbon WG-12 produced by GRYFSKAND of Hajnówka in Poland. ROW 08 Supra is granulated and refined activated carbon, which can be thermally regenerated. It is produced from peat by Dutch company NORIT by the use of steam-gas method. The carbon is characterized by a large volume of pores and large size of the grains, which makes, that is commonly used for drinking water treatment in order to enhance the taste of the water and remove the odor, chlorine, ozone and micropollutants (e.g., dissolved organic substances or pesticides). The carbon F-300 is produced by the Belgian company CHEMVIRON CARBON. Sonication of activated carbons was carried out in an ultrasonic generator UPS 400 S Hielscher's designed for stationary use. The modification of activated carbons by sonication was made as follows: the test coals were filled with distilled water in an amount of 500 cm3 and treated by ultrasonic field for 5, 10, 15 and 20 minutes. Two series of tests were performed with amplitudes equal 50 and 100%. After sonication process, activated carbons were dried at 145°C to obtain of constant weight. Then, an analysis of selected technical indicators such as bulk density, iodine number, the number of the methylene and the ash content according to the PN were made.
węgle aktywne; pole ultradźwiękowe
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