Temperature-responsive alkaline aqueous biphasic system for radioactive wastewater treatment

Selective Separation of Americium(III), Curium(III), and Lanthanide(III) by Aqueous and Organic Competitive Extraction

“…9−11 In order to improve the long-term management safety of nuclear waste, the partitioning-transmutation strategy (P&T) was emerged and recognized as a viable global option. 12,13 The proposed P&T initially partitioned the transuranic elements and longlived fission products by the PUREX process using solvent extraction, 14,15 and they were subsequently subjected to neutron bombardment for transmutation into short-lived nuclides. 16 For the realization of the P&T strategy, the initial separation of Ln(III) from An(III) is an inevitable prerequisite.…”

“…The increasing demand of carbon-neutral and low-cost energy has caused nuclear energy to become an essential element in the overall composition of the current global power supply. − Accompanied by the high-speed development of nuclear energy, the environmental problems associated with used nuclear fuel have aroused great attention. − Of the spent fuel produced by modern light water reactors, over 98.5% of the components are mainly composed of U, Pu, and lanthanides (Ln) . However, it still contains less than 1 wt % of minor actinides (MA) including Am, Np, and Cm, which are responsible for long-standing radiotoxicity. − In order to improve the long-term management safety of nuclear waste, the partitioning-transmutation strategy (P&T) was emerged and recognized as a viable global option. , The proposed P&T initially partitioned the transuranic elements and long-lived fission products by the PUREX process using solvent extraction, , and they were subsequently subjected to neutron bombardment for transmutation into short-lived nuclides . For the realization of the P&T strategy, the initial separation of Ln­(III) from An­(III) is an inevitable prerequisite .…”

Hollow Core–Shell Bismuth Based Al‐Doped Silica Materials for Powerful Co‐Sequestration of Radioactive I2 and CH3I

“…During the reprocessing of nuclear fuel following the operation of nuclear power plants, a substantial amount of radioactive waste gas is generated, including radioactive gaseous iodine ( 129 I, 131 I). [1][2][3][4] Alongside the predominant inorganic iodine process remain Ag-modified zeolite/silica gel sorbents, attributed to the well-known reaction between Ag and iodine. [25] Nevertheless, the expense associated with silver and its inherent limitation in sorption capacity underscores the urgency of enhancing the existing capture system.…”

“…During the reprocessing of nuclear fuel following the operation of nuclear power plants, a substantial amount of radioactive waste gas is generated, including radioactive gaseous iodine ( 129 I, 131 I). [ 1–4 ] Alongside the predominant inorganic iodine component (I 2 , 90–100%), a minor fraction exists in the form of organic iodine (CH 3 I, 0–10%). [ 2 ] Compared to I 2 , CH 3 I has higher C–I bond energy, greater steric hindrance, and lacks intermolecular interactions.…”

Two-Fold Interlocking Cationic Metal–Organic Framework Material with Exchangeable Chloride for Perrhenate/Pertechnetate Sorption

“…In general, technetium exists at a stable oxidation (TcO 4 – ) under aerobic steam, rendering it properties of low large density, high mobility, and solubility. − Therefore, elimination of technetium-99 remains a large challenge in the disposal of the contaminated water environment. In spite of multifarious methods, such as precipitation, solvent extraction, reduction, ion exchange, and so on have been adopted to settle this issue. − Ion exchange still was one of the most popular methods due to the nature of being simple, green, and low cost. , In the past few decades, diverse cationic materials such as layered double hydroxides (LDHs), anion resins, cationic polymeric networks, covalent organic frameworks (COFs), metal–organic frameworks (MOFs), and so forth have already been developed to remove pertechnetate (TcO 4 – ) via electrostatic interactions to exchange counterions. − Among multifarious sorbents, cationic MOFs have caught researcher’s attention because of their high sorption performance as anion receptors. − Compared with traditional materials, cationic MOFs exhibit large sorption capacity, high selectivity, strong radiation resistance, and reusability. Furthermore, deriving facile functionalization and other characteristics, the MOFs allow to precisely change cavity, shape, specific surface areas, and counterions to design desired structures, resulting in a type of a potential candidate for sequestering pertechnetate. − …”