INTERACTION OF NPO2+ WITH CL- IN NA-CA-CL TYPE SOLUTIONS WITH HIGH IONIC STRENGTH


37th Annual CNS Conference - 2017 June 04-07

Presented at:
37th Annual CNS Conference
2017 June 04-07
Location:
Niagara Falls
Session Title:
1B4 - Health, Environment & Spent Fuel / Waste Management (I)

Authors:
S. Nagasaki (McMaster University)
T. Saito (The University of Tokyo)
S. Tsushima (HZDR)
J. Goguen (McMaster University)
T. Yang (NWMO)
  

Abstract

The interaction of NpO2+ with Cl- was studied using UV-Vis spectroscopy in the NaCl-CaCl2-NaClO4, NaCl-NaClO4 and CaCl2-NaClO4 solutions with ionic strength (I) of 6 M. The spectra of NpO2+ around 980 nm varied with Cl- concentration in the NaCl-CaCl2-NaClO4 and NaCl-NaClO4 solutions at [Cl-] ≥ 3.5 M, but not in the CaCl2-NaClO4 solution. Assuming the 1:1 interaction between NpO2+ and Cl-, the apparent equilibrium constants at I = 6 M were evaluated. The apparent equilibrium constant in the NaCl-CaCl2-NaClO4 solution was found to be smaller than that in the NaCl-NaClO4 solution. The observations were consistent with the density functional theory calculation.

Individual Conference-Paper Copies (Electronic Where Available):

  • For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
  • For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
  • Contact the CNS office to order reprints.