In-situ oxidized tungsten disulfide nanosheets achieve ultrafast photocatalytic extraction of uranium through hydroxyl-mediated binding and reduction

Enhanced photocatalytic removal of U(vi) from water using tea waste biochar/g-C3N4/MoS2 Z-scheme composite: synthesis, performance, and mechanistic insights

“…The different adsorption capacity of coexisting cations is primarily related to their differing valency, radii, softness, and hydrolysis abilities. 38 Among the cations, Cu 2+ exhibits the strongest inhibitory effect, resulting in only a 82% removal efficiency. As reported by Liu et al , 38 the reduction potential of Cu 2+ (−0.325 V) was lower than that of U( vi ) (−0.394 V).…”

Selective Anchoring by Surface Sulfur Species Coupled with Rapid Interface Electron Transfer for Ultrahigh Capacity Extraction of Uranium from Seawater

“…9 Thereinto, metal sulfides have attracted much attention owing to their high specific surface area, excellent electrical conductivity, and open structure, which can provide sufficient active sites and fast network electron transport. 10 More importantly, S 2− is a soft Lewis base anion, and UO 2 2+ is a soft Lewis acid cation, leading to a strong interaction force between them, which can resist the interference of hard Lewis acid cations (Na + , Ca 2+ , etc.) and endow metal sulfides with potential and special adsorption toward UO 2 2+ .…”

“…Transition-metal-based compound nanomaterials have been developed rapidly because of their advantages, such as simple preparation, low cost, and the sorption/reduction synergistic effect . Thereinto, metal sulfides have attracted much attention owing to their high specific surface area, excellent electrical conductivity, and open structure, which can provide sufficient active sites and fast network electron transport . More importantly, S 2– is a soft Lewis base anion, and UO 2 2+ is a soft Lewis acid cation, leading to a strong interaction force between them, which can resist the interference of hard Lewis acid cations (Na + , Ca 2+ , etc.)…”

Electrocatalytic Removal of Low-Concentration Uranium Using TiO2 Nanotube Arrays/Ti Mesh Electrodes

“…Naturally occurring uranium in groundwater is an urgent environmental issue faced by over 20 countries, which is summarized in Table S1. Most of these groundwaters are used for drinking purposes (Table S1), which poses a severe threat to human health due to the high toxicity and radioactivity of uranium. , The World Health Organization (WHO) and the U.S. Environmental Protection Agency (EPA) have set a maximum concentration for uranium at 0.13 μM in drinking water. , Naturally occurring uranium is commonly found at relatively low concentrations (less than 1.5 μM) in groundwater (Table S1), but these concentrations are still far above the WHO and U.S. EPA limits (0.13 μM). In addition, CO 3 2– and Ca 2+ are common ions in groundwater.…”