Abstract
Steam-activated carbon specimens (OL) were subjected to different doses of γ-irradiation varying between 7 and 100 Mrad. The adsorption of iodine from aqueous KI solution at 25°C, nitrogen at -196°C and carbon dioxide at 25°C were carried out. The results revealed that γ-irradiation uo to 35 Mrad did not lead to any detectable change in the adsorption behaviour of the adsorbates investigated. However, irradiation at higher doses viz. 80 and 100 Mrad resulted in a significant increase in pore size as determined from carbon dioxide adsorption isotherms to an extent proportional to the dose employed. This increase might be attributed to a possible radiolytic decomposition of oxygen complexes located on the surfaces of stream-activated carbons. Observed change was also found in the shape of iodine isotherms. However, a single nitrogen isotherm was measured for both the unirradiated and all irradiated carbons.
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Schedule a callMore From: International Journal of Radiation Applications & Instrumentation. Part C, Radiation Physics & Chemistry
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