The complexation behavior of neptunium and plutonium with nitrilotriacetic acid
The first stability constant of NpO{sub 2}{sup +} with nitrilotriacetic acid (NTA) was determined at four ionic strengths (0.5, 1.0, 2.0, 3.0 M) using spectrophotometry. Nonlinear least-squares data fitting identified the complex as NpO{sub 2}NTA{sup 2-}. The Specific Ion Interaction Theory (S.I.T) approximation method was used to determine the stability constants at infinite dilution. First results on Pu{sup 4+} and PuO{sub 2}{sup 2+} complexation with NTA are reported. The stability constant for the Pu(NTA){sup +} complex at I = 0.1 M strength is given. From results for PuO{sub 2}{sup 2+} complexation with NTA (I = 1 M) at pH < 3, the stability constant was derived for PuO{sub 2} NTA{sup {minus}}. At pH > 3, NTA partially reduced PuO{sub 2}{sup 2+} to PuO{sub 2}{sup +}. 3 refs., 5 figs., 4 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5635583
- Report Number(s):
- LBL-28821; CONF-900846-7; ON: DE92009986
- Resource Relation:
- Conference: International symposium to commemorate the 50th anniversary of discovery of transuranium elements, Washington, DC (United States), 26-31 Aug 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
NEPTUNIUM IONS
THERMODYNAMIC PROPERTIES
PLUTONIUM IONS
ENVIRONMENTAL TRANSPORT
EQUILIBRIUM
NTA
PH VALUE
RADIOACTIVE WASTE DISPOSAL
SPECTROPHOTOMETRY
AMINO ACIDS
CARBOXYLIC ACIDS
CHARGED PARTICLES
CHELATING AGENTS
IONS
MANAGEMENT
MASS TRANSFER
ORGANIC ACIDS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RADIOACTIVE WASTE MANAGEMENT
WASTE DISPOSAL
WASTE MANAGEMENT
400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials
052002 - Nuclear Fuels- Waste Disposal & Storage
540230 - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- (1990-)