Neptunium migration in salt brine aquifers

Journal Article · Mon Sep 01 04:00:00 EDT 1986 · Nucl. Technol.; (United States)

OSTI ID:5160922

Bidoglio, G; DePlano, A

Investigation of reactions between neptunium and soil samples representative of the saline area around the Gorleben salt dome (Federal Republic of Germany) was conducted to obtain an understanding of the transport mechanism of neptunium in saturated brine aquifers. Leaching of /sup 237/ Np-doped glasses with brine under oxic conditions resulted in the release of soluble species of Np(V). Adsorption parameters obtained from the application of nonlinear sorption isotherms to static experiments were used to interpret the migration of neptunium through soil columns. The existence of two different adsorption sites reacting with neptunium at different rates was postulated. Retardation factors under oxic and anoxic conditions were measured. In anoxic environments such as those found in undisturbed repository horizons, more neptunium activity was fixed by the soil.

• Research Organization: Commission of the European Communities, Joint Research Centre Ispra Establishment, Radiochemistry and Nuclear Chemistry Div. 21020 Ispra (Va)
• OSTI ID: 5160922
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 74:3; ISSN NUTYB
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ADSORPTION ISOTHERMS
ALPHA DECAY RADIOISOTOPES
AQUIFERS
BOROSILICATE GLASS
BRINES
DISSOLUTION
DOPED MATERIALS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL TRANSPORT
EUROPE
FEDERAL REPUBLIC OF GERMANY
GEOLOGIC DEPOSITS
GLASS
HEAVY NUCLEI
HIGH-LEVEL RADIOACTIVE WASTES
ISOTHERMS
ISOTOPES
LEACHING
MANAGEMENT
MASS TRANSFER
MATERIALS
NEPTUNIUM 237
NEPTUNIUM ISOTOPES
NUCLEAR FACILITIES
NUCLEI
ODD-EVEN NUCLEI
RADIOACTIVE MATERIALS
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE FACILITIES
RADIOACTIVE WASTES
RADIOECOLOGICAL CONCENTRATION
RADIOISOTOPES
RADIONUCLIDE MIGRATION
RESEARCH PROGRAMS
SALT DEPOSITS
SEPARATION PROCESSES
SOILS
UNDERGROUND DISPOSAL
WASTE DISPOSAL
WASTE FORMS
WASTE MANAGEMENT
WASTE-ROCK INTERACTIONS
WASTES
WESTERN EUROPE
YEARS LIVING RADIOISOTOPES