Oxalate complexation with aluminum(III) and iron(III) at moderately elevated temperatures

Conference · Wed Jan 01 00:00:00 EST 1992

OSTI ID:5597194

Tait, C D; Janecky, D R; Clark, D L ^[1]; Bennett, P C ^[2]

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1. Los Alamos National Lab., NM (United States)
2. Texas Univ., Austin, TX (United States). Dept. of Geological Sciences

To add to our understanding of the weathering of rocks in organic rich environments such as sedimentary brines and oil field waters, we have examined the temperature dependent complexation of aluminum with oxalate. Raman vibrational studies show that even the association constant for the highly charged Al(ox){sub 3}{sup 3{minus}} unexpectedly increases with moderate temperature increases to 80{degrees}C. To evaluate the potential importance of these Al-oxalate species in complex natural systems, temperature dependent competition experiments Fe(III) and Al(III) for oxalate have been initiated. Similar to aluminum, ferric oxalates show increases in association constants at higher temperatures. In competition experiments, the first association constant for Fe(ox){sup +} increases faster than that for Al(ox){sup +} to 90{degrees}C.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5597194
• Report Number(s): LA-UR-92-895; CONF-920761-12; ON: DE92011361
• Resource Relation: Conference: 7. water-rock interaction conference, Park City, UT (United States), 9-23 Jul 1992
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
58 GEOSCIENCES
ALUMINIUM
CHEMICAL REACTIONS
ALUMINIUM COMPLEXES
RAMAN SPECTRA
IRON
IRON COMPLEXES
OXALATES
ABSORPTION SPECTRA
BRINES
OIL FIELDS
SEDIMENTARY ROCKS
TEMPERATURE DEPENDENCE
CARBOXYLIC ACID SALTS
COMPLEXES
ELEMENTS
GEOLOGIC DEPOSITS
METALS
MINERAL RESOURCES
PETROLEUM DEPOSITS
RESOURCES
ROCKS
SPECTRA
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
020200* - Petroleum- Reserves
Geology
& Exploration
400201 - Chemical & Physicochemical Properties
580000 - Geosciences