Abstract
Abstract Adsorption is one of the methods for processing gas and liquid radioactive waste to prevent the dispersion of substances into the environment. The metal-organic framework (MOF) material HKUST-1, known for its porous structure, exhibits impressive adsorption capacity and efficiency. These characteristics make it highly suitable as a radioactive waste adsorbent. This study aims to assess its resilience to gamma radiation by exposing it to doses ranging from 125 to 200 kGy, with a 25 kGy interval. The samples used in this research were produced using the solvothermal method at 100°C. Subsequently, the irradiated samples underwent evaluation using XRD, SEM, and isothermal adsorption with nitrogen gas. As the dose increased, the crystal grain size decreased, resulting in sharper crystal corners. Additionally, the crystallinity value rose from 15.49% to 17.70%. However, at a dose of 175 kGy, the crystalline corners became obtuse, and the degree of crystallinity decreased to 16.21%. Based on the isothermal adsorption results, the adsorbed gas volume increased from 212.186 cm3/g to 340.335 cm3/g, the surface area expanded from 520.379 m2/g to 917.048 m2/g, and the pore volume grew from 0.424 cm3/g to 0.615 cm3/g. In contrast, the pore radius decreased from 1.631 nm to 1.341 nm, except at 175 kGy, where it measured 1.399 nm. This result surpassed the sample irradiated at 150 kGy, which had a pore radius value of 1.352 nm.
Published Version
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