Pulse radiolysis of aqueous lithium chloride solutions

Abstract

Publication costs assisted by the French Atomic Energy CommissionThe formation of CI2by pulse radiolysis and its subsequent disappearance, in the presence and absence of N20, have been studied with neutral LiCl solutions of concentrations up to 14 M. In deaerated solutions, the yield with respect to the total absorbed dose shows a maximum at about 9 M, where G(Cl2~) = 3.4, and decreases at higher concentrations. This would seem to indicate that the direct effect on the Clions gives rise to almost no CI2-, while the yield of primary species responsible for its formation (H20 radiolysis) would appear to be about 4.7.

Radiation-chemical effects in the near-field of a final disposal site: role of bromine on the radiolytic processes in NaCl-solutions

“…Radiation effects in chloride brines are therefore of fundamental importance for the safety of a final disposal. The radiolysis of highly concentrated chloride solutions (NaCl, MgCl 2 and LiCl) was previously investigated [3][4][5][6][7][8]. Using pulse radiolysis it was found that the Cl 2 − radical anions are formed in acidic solutions as a consequence of the following reversible reactions: yield of different radiolytic products formed by γ -radiolysis from NaCl brines at ambient temperature and dose rates betweeen 0.1 and 1 kGy/h were determined [9,10].…”

Effect of chloride on bacterial inactivation by discharge plasma at the gas‐solution interface: Potentiation or attenuation?

“…Several studies have confirmed that chloride can effectively scavenge hydroxyl radicals to generate active chlorine . If the ROS that oxidized chloride was in fact hydroxyl radical during O 2 plasma treatment, then it would be expected that less hydroxyl radicals would be produced in the presence of NaCl compared to its absence.…”

“…[40] During the 1970s several studies have been done on the yields of primary species produced by the radiolysis of chloride solution and it was found that chloride is an efficient scavenger for hydroxyl radicals. [30][31][32][33][34][35] Hydroxyl radicals can be scavenged by chloride with the rate constant being (4.3 ± 0.4) × 10 9 M −1 s −1 to yield HClO − and other active chlorine species (reactions 1-6). [41,42] Cl À þ HO·↔HOCl ·À ; ð1Þ…”

“…Several studies have confirmed that chloride can effectively scavenge hydroxyl radicals to generate active chlorine. [30][31][32][33][34][35] If the ROS that oxidized chloride was in fact hydroxyl radical during O 2 plasma treatment, then it would be expected that less hydroxyl radicals would be produced in the presence of NaCl compared to its absence. Herein, the possible reaction of chloride with plasmagenerated hydroxyl radicals was examined indirectly by monitoring the effect of NaCl on hydroxyl radical generation by use of 3-CCA, which is a non-fluorescent product and can emit fluorescence at about 450 nm after hydroxylation by hydroxyl radicals.…”

The pulse radiolysis of 1-propanol at 147 to 300 K

“…The wavelength range of the photomultiplier (Hamamatsu R446) is 185-850 nm. Further details may be found in previous publications (19,20).…”