Carbon-containing sorbents for removing volatile radioactive iodine compounds from the water vapor-air medium

• Published in: Radiochemistry (New York, N.Y.) N.Y.), 2015-07, Vol.57 (4), p.421-424
• Main Authors: Kulyukhin, S. A., Rumer, I. A., Posazhennikov, A. M., Yagodkin, I. V., Bessonov, A. A.
• Format: Article
• Language: English
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Nuclear Chemistry
• ISSN: 1066-3622; 1608-3288
• DOI: 10.1134/S1066362215040153

The sorption of CH 3 131 I and 131 I 2 from a water vapor-gas medium onto various grades of activated carbon was studied. All the sorbents tested exhibit high ability to take up 131 I 2 . The 131 I 2 uptake exceeds 99.95% at 60°C and contact time of the gas phase with the sorbent τ = 0.5–0.7 s. The ability of the sorbents based on activated carbon to take up CH 3 131 I strongly depends on the sorbent particle size. High ability to take up CH 3 131 I from a water vapor-air flow is preserved only for cylindrical particles 1.0 mm in diameter and 1.0–2.0 mm long. Activated anthracite, like activated carbon with cylindrical particles 3.5 mm in diameter and 3.0–9.0 mm long, exhibits low performance in CH 3 131 I uptake. The degree of localization of CH 3 131 I does not exceed 40% at 60°C and τ = 0.5–0.7 s.