Адуунчулууны идэвхжүүлсэн нүүрсний төмөр(III), кобальт(II) шингээх идэвхийн судалгаа. (Mongolian)

Coal from Aduunchuluun deposit was pre-treated by pyrolysis at 600°C, and semi-coke was activated at 800°C under a steam flow of 2 ml/min for 120 and 240 minutes to obtain activated carbons. The maximum weight loss of activated carbon was 64.7% with relatively high adsorption capacity, i.e. iodine and methylene blue absorption was 615 mg/g and 762 mg/g, surface area was 894 m² /g, respectively. The activity of Fe 3+ and Co 2+ ion adsorption of activated carbon was investigated depending on the pH of aqueous solution, initial concentration of metal ions, adsorption time and temperature. The removal of Fe 3+ ions was 93.2-93.7%, for Co 2+ ions was 95.1-95.2%. According to the adsorption isotherms and thermodynamic studies, the adsorption process was leading to the multilayer coverage with the metallic ions on the heterogeneous surfaces )micro- and meso-) of the activated carbons )A3 and A-7) and the adsorption process was spontaneous. [ABSTRACT FROM AUTHOR]

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