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, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10133514
- 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; Other Information: PBD: Aug 1990
- Country of Publication:
- United States
- Language:
- English
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12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
54 ENVIRONMENTAL SCIENCES
NEPTUNIUM IONS
THERMODYNAMIC PROPERTIES
PLUTONIUM IONS
SPECTROPHOTOMETRY
NTA
PH VALUE
EQUILIBRIUM
RADIOACTIVE WASTE DISPOSAL
ENVIRONMENTAL TRANSPORT
400702
052002
540230
PROPERTIES OF RADIOACTIVE MATERIALS
WASTE DISPOSAL AND STORAGE
RADIOACTIVE MATERIALS MONITORING AND TRANSPORT