Published December 2017 | Version v1
Journal article Metadata-only

Interaction of NpO2+ with Cl- in Na-Ca-Cl-type solutions at ionic strength of 6M: Effect of presence of Ca ion on interaction

Creators

  • 1. Dept. of Engineering Physics, McMaster University, Hamilton (Canada)
  • 2. Dept. of Nuclear Engineering and Management, University of Tokyo, Tokyo (Japan)
  • 3. Institute of Resource Ecology, Dresden (Germany)
  • 4. Nuclear Waste Management Organization, Toronto (Canada)

Description

The interaction of NpO2+ with Cl- was studied using visible-near-infrared spectroscopy in NaCl-CaCl2-NaClO4, NaCl-NaClO4, and CaCl2-NaClO4 solutions with ionic strength (I) of 6M. The spectra of NpO2+ around 980 nm varied with Cl- concentration in the NaCl-CaCl2-NaClO4 and NaCl-NaClO4 solutions at [Cl-] ≥ 3.5M, but not in the CaCl2-NaClO4 solution. Assuming the 1:1 interaction between NpO2+ and Cl-, the apparent equilibrium constants at I = 6M were evaluated. The presence of Ca2+ was found to destabilize overall interaction between NpO2+ and Cl-. The observations were consistent with the density functional theory calculation

Additional details

Publishing Information

Journal Title
Nuclear Engineering and Technology
Journal Volume
49
Journal Issue
8
Series
31 refs, 5 figs, 1 tab
Journal Page Range
p. 1778-1782
ISSN
1738-5733

INIS

Country of Publication
Korea, Republic of
Country of Input or Organization
Korea, Republic of
INIS RN
49063933
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S38: RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY;
Descriptors DEI
CALCIUM IONS; COMPUTER CALCULATIONS; EQUILIBRIUM; INFRARED SPECTRA; NEPTUNIUM OXIDES; SODIUM CHLORIDES
Descriptors DEC
ACTINIDE COMPOUNDS; ALKALI METAL COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; CHLORIDES; CHLORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IONS; NEPTUNIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SODIUM COMPOUNDS; SODIUM HALIDES; SPECTRA; TRANSURANIUM COMPOUNDS