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

Conference · Wed Sep 26 00:00:00 EDT 1990

OSTI ID:5200676

Robouch, P; Grant, P; Torres, R A; Baisden, P A; Silva, R J

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.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5200676
• Report Number(s): UCRL-JC-103705; CONF-9011116-11; ON: DE91018720
• 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

Related Subjects

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