Электронный каталог

Статья

Al-Ruqeishi, M.
Graphene Oxide Removal of Radioactive Materials in Al-Khatmain Falaj Water / M.Al-Ruqeishi, G.Arzumanyan, [a.o.]. – Text : electronic // Radiation Physics and Chemistry. – 2026. – Vol. 246. – P. 113903. – URL: https://doi.org/10.1016/j.radphyschem.2026.113903. – Bibliogr.: p. 113903-(10-11).

This paper sets out the findings of research which used graphene oxide (GO) as a selective adsorbent to eliminate radionuclides from the Al-Khatmyain falaj, a historic irrigation system and a UNESCO World Heritage Site, that brings water from underground. The radioactivity levels of Ra-226, Am-241, Cs-134, Cs-137, I-131 and K-40 were measured in water samples using a High-Purity Germanium (HPGe) detector. The initial radiological evaluation revealed that all radionuclides were detected at levels below the World Health Organization (WHO) safety limits. Furthermore, the annual committed effective doses (ranging from 5.3 × 10&sup(−5) to 4.4 × 10&sup(−2) mSv yr&sup(−1) ) were significantly lower than the reference level of 0.1 mSv yr&sup(−1) . The removal efficiency of GO was examined in three distinct experimental groups: untreated samples, fixed GO concentrations (0.006 g/mL) and variable GO concentrations (0.012–0.020 g/mL) at a constant pH of approximately 7.2. The findings demonstrated a dose-dependent selectivity, with removal efficiencies of ≥96% for K-40, ≥72% for I-131, ≥62% for Ra226 and ≥ 40% for Am-241 at optimal performance at 0.016 g/mL. The oxygen-containing functional groups in GO have been identified as the critical components responsible for the selective adsorption mechanism. The formation of negatively charged surfaces by these groups is conducive to ion exchange, electrostatic attraction and chelation, which demonstrate optimal efficacy for divalent cations. The active sites were blocked by nanosheet aggregation, and increased concentrations (0.2 g/mL) were demonstrated to decrease efficiency. The findings of this study provide robust evidence to support the postulation that GOs have the potential to be effective in the context of targeted radionuclide remediation, particularly in scenarios involving radionuclides with a wide range of solubility in water.



Спец.(статьи,препринты) = С 413 г - Химические эффекты ядерных превращений. Химические формы стабилизации продуктов ядерных реакций. Радиационная химия
Спец.(статьи,препринты) = С 349 г - Радиоактивные загрязнения и активация воздуха, газов, воды и окружающих материалов. Дезактивация
ОИЯИ = ОИЯИ (JINR)2026