AI Article Synopsis
- The TALSPEAK process is used for separating trivalent actinides and lanthanides from high-level nuclear waste through a hollow fibre renewable liquid membrane.
- Optimal conditions for the separation include a feed solution containing specific concentrations of DTPA and lactic acid, along with controlled agitation and stirring speeds.
- The permeability coefficients of various metal ions indicate that La(III) is the easiest to separate, while Sm(III) is the hardest, with the decontamination factor for Am(III) achieving a notable value of 412.
Article Abstract
In concurrence with objectives of advanced high level nuclear waste(HLW) management, separation of chemically similar trivalent actinides and lanthanides is accomplished using TALSPEAK (Trivalent Actinide - Lanthanide Separation by Phosphorous reagent Extraction from Aqueous Komplexes) process on hollow fibre renewable liquid membrane (HFRLM). Permeability coefficient(K) of metal ions are determined under varying concentrations of diethylene triamine pentacaetic acid (DTPA) and H in the feed solution, containing Am with other metal impurities usually occurred in the HLW, and di(2-ethylhexyl) phosphoric acid (HDEHP) in liquid membrane and receiving emulsion phase. Optimized process conditions obtained are: 5 ± 0.25 L feed solution: containing 0.05 M DTPA, 1 M lactic acid and metal ions under the agitation of 400 ± 15 rpm, receiving phase: emulsion of 400 ± 15 mL 2 M HNO + 100 mL 0.2 M HDEHP/dodecane under stirring at 650 ± 25 rpm. The K of metal ions obtained under optimized process conditions are in the order: Am(III)<
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http://dx.doi.org/10.1016/j.jhazmat.2020.123050 DOI Listing Publication Analysis
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