Improved performance of a biomaterial-based cation exchanger for the adsorption of uranium(VI) from water and nuclear industry wastewater

Solid phase extraction of uranium(VI) onto benzoylthiourea-anchored activated carbon

“…Besides, it should be noted that uranyl ion may convert to other species (such as UO 2 OH + and (UO 2 ) 2 (OH) 2 2+ ) at lower acidity [26]. So the pH value in this study was limited in the range of 1.0-5.0 for the maximum uranium(VI) initial concentration of 200 mg/L according to solubility calculation [27]. …”

Adsorption and desorption of uranium (VI) in aerated zone soil

“…So, their geochemical behavior in soil has been an important topic in the field of nuclear waste disposal programs (Fan et al, 2009;Wang et al, 2006;Wang and Chen, 2007), especially when considering the migration behavior of radioelements. As one of the most frequent radionuclide contaminants in ground and surface waters, uranium has a long half-life ( 234 U, t 1/2 ¼ 2.48 Â 10 5 a; 235 U, t 1/2 ¼ 7.13 Â 10 8 a; 238 U, t 1/2 ¼ 4.51 Â 10 9 a) and significant biological/ chemical toxicity (Anirudhan and Radhakrishnan, 2009;Bachmaf et al, 2009). Therefore, great efforts have been devoted in recent years to understanding the interaction between uranium and soils for the safety assessment of disposal of radioactive waste (Benes et al, 1997;Claveranne-Lamolere et al, 2011;Majdan et al, 2010).…”

Adsorption of uranium(VI) from aqueous solution using a novel magnetic hydrothermal cross-linking chitosan

“…This attributed to the higher mobility of uranyl ion uranyl ion in the diluted solutions, resulting interaction of uranium(VI) and the adsorbent increase. The larger concentration gradient between adsorbents/solution interface caused the stronger equilibrium uptake [22].…”