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000863442 1001_ $$0P:(DE-HGF)0$$aSzreder, T.$$b0$$eCorresponding author
000863442 245__ $$aFast radiation-induced reactions in organic phase of SANEX system containing CyMe4-BTPhen extracting agent
000863442 260__ $$aFrankfurt, M.$$bPergamon Press$$c2019
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000863442 520__ $$aThe mechanism of radiation-induced fast reactions occurring in the early stages in the 1-octanol system containing 2,9-Bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo (Herbst et al., 2011; Nash et al., 2015; Bourg et al., 2015)triazin-3-yl)- (Herbst et al., 2011; Panak and Geist, 2013)phenanthroline (CyMe4-BTPhen) extracting agent were studied. This is a simplified model of the r-SANEX organic phase for the selective actinide(III)/lanthanide(III) separation. Effects of various scavengers as well as water content were under consideration. Radiation chemical yield of e−s (G(e−s)) and their molar absorption coefficient (ε(e−s)) in 1-octanol were found to be 130(10) nmol J−1 and 18500(700) M−1 cm−1, respectively. Rate constants of e−s reactions with H+, O2, CyMe4-BTPhen and its protonated form were found to be 1.5(3) × 109, 1.0(1) × 1010, 1.85(9) × 109, 1.9(6) × 109 M−1 s−1, respectively. The C37 value for scavenging of dry electrons (e−dry) by CyMe4-BTPhen was equal to 30.4(8) mM. Rate constants of H• reactions with CyMe4-BTPhen and its protonated form were found to be < 7.2 × 109 and 4.3(9) × 109 M−1 s−1, respectively. A relatively good extraction performance of the system studied under exposition to high radiation doses was explained on the basis of hydroxyloctyl substitution in a phenanthroline aromatic ring.
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000863442 7001_ $$0P:(DE-Juel1)156232$$aSchmidt, H.$$b1
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