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Title: Development of high-temperature UV-VIS-NIR spectroscopy for the measurement of free energies of complexation at elevated temperatures

Abstract

We have developed instrumentation capable of measuring optical absorption spectra over a wavelength range of 200--1200 nm and a temperature range of 20--100{degree}C. This fiber-optic based spectrometer generates data which allow the computation of metal-ligand equilibrium constants. Studies at five temperatures have been completed using praseodymium-diglycolate as a model system. Fundamental thermodynamic values (free energies, enthalpies, entropies) were obtained from the experimentally-determined stability constants. Thermodynamic data pertinent to the interactions of actinides and long-lived fission products with groundwater, waste package components, and geologic media are critical input to modeling programs. 9 refs., 1 fig., 2 tabs.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
5200676
Report Number(s):
UCRL-JC-103705; CONF-9011116-11
ON: DE91018720
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 14. symposium on scientific basis for nuclear waste management, Boston, MA (United States), 26-29 Nov 1990
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; PRASEODYMIUM COMPLEXES; THERMODYNAMICS; ABSORPTION SPECTRA; FREE ENERGY; GLOVEBOXES; OPTICAL FIBERS; SPECTROSCOPY; COMPLEXES; ENERGY; EQUIPMENT; FIBERS; LABORATORY EQUIPMENT; PHYSICAL PROPERTIES; RARE EARTH COMPLEXES; SPECTRA; THERMODYNAMIC PROPERTIES; 400201* - Chemical & Physicochemical Properties; 052002 - Nuclear Fuels- Waste Disposal & Storage

Citation Formats

Robouch, P, Grant, P, Torres, R A, Baisden, P A, and Silva, R J. Development of high-temperature UV-VIS-NIR spectroscopy for the measurement of free energies of complexation at elevated temperatures. United States: N. p., 1990. Web.
Robouch, P, Grant, P, Torres, R A, Baisden, P A, & Silva, R J. Development of high-temperature UV-VIS-NIR spectroscopy for the measurement of free energies of complexation at elevated temperatures. United States.
Robouch, P, Grant, P, Torres, R A, Baisden, P A, and Silva, R J. 1990. "Development of high-temperature UV-VIS-NIR spectroscopy for the measurement of free energies of complexation at elevated temperatures". United States. https://www.osti.gov/servlets/purl/5200676.
@article{osti_5200676,
title = {Development of high-temperature UV-VIS-NIR spectroscopy for the measurement of free energies of complexation at elevated temperatures},
author = {Robouch, P and Grant, P and Torres, R A and Baisden, P A and Silva, R J},
abstractNote = {We have developed instrumentation capable of measuring optical absorption spectra over a wavelength range of 200--1200 nm and a temperature range of 20--100{degree}C. This fiber-optic based spectrometer generates data which allow the computation of metal-ligand equilibrium constants. Studies at five temperatures have been completed using praseodymium-diglycolate as a model system. Fundamental thermodynamic values (free energies, enthalpies, entropies) were obtained from the experimentally-determined stability constants. Thermodynamic data pertinent to the interactions of actinides and long-lived fission products with groundwater, waste package components, and geologic media are critical input to modeling programs. 9 refs., 1 fig., 2 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/5200676}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 26 00:00:00 EDT 1990},
month = {Wed Sep 26 00:00:00 EDT 1990}
}

Conference:
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