Chromatography separation of minor actinides from Ln ³⁺ rich high-level radioactive liquid waste (HLW) using bis-triazinyl-pyridine (BTP) resin

Theoretical Study of Am(III) and Eu(III) Separation by a Bipyridyl Phosphate Ligand

“…To achieve the efficient extraction of An­(III), several candidate extractants have been proposed (Figure ). Bis-triazinyl-pyridine (BTP), composed solely of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), is a promising candidate extractant that exhibits excellent performance and generates no secondary waste. , 6,6′-Bis­(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzol­[1,2,4]­triazin-3-yl)­[2,2]­bipyridine (CyMe4-BTBP) is another effective extractant known for its resistance to acidic environments and the intense radiation of radiolysis present during the separation. , Additionally, 2,9-bis­(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4-BTPhen) possesses higher surface activity at the organic/water interface than CyMe4-BTBP due to higher local concentrations . Zsabka et al demonstrated that [A336]­[NO3]/CyMe4-BTPhen could be utilized either with or without a phase transfer catalyst and co-diluent for separating actinides from lanthanide series, effectively resolving the sluggish kinetics even at elevated temperatures …”

“…Bis-triazinyl-pyridine (BTP), composed solely of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), is a promising candidate extractant that exhibits excellent performance and generates no secondary waste. 11 , 12 6,6′-Bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzol[1,2,4]triazin-3-yl)[2,2]bipyridine (CyMe4-BTBP) is another effective extractant known for its resistance to acidic environments and the intense radiation of radiolysis present during the separation. 13 , 14 Additionally, 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4-BTPhen) possesses higher surface activity at the organic/water interface than CyMe4-BTBP due to higher local concentrations.…”