A study of the physical-chemical mechanisms and variables which affect the transport of inorganic and organic heterogeneous systems
In order to model transport of dissolved ions in subsurface environments, one should understand how these ions interact with solid phase adsorbents. Our primary goal has been investigating the reaction mechanisms which affect microcontaminant partitioning between aqueous solutions and solid phase adsorbents, using goethite ({alpha}-FeOOH) as a model adsorbent. Cylindrical internal reflection -- Fourier transform infrared (CIR-FTIR) spectroscopy has been developed as the primary technique for this study. Wet chemical adsorption studies, acoustophoresis and electrophoretic mobility have been used to obtain supporting information as needed. Phenol and o-nitrophenol did not adsorb to goethite. Benzoate, phthalate and p-hydroxybenzoate all adsorbed via a bidentate mechanism to two adjacent iron atoms, while salicylate and 2,4-dihydroxybenzoate formed a chelate complex to single iron atoms. Phosphate adsorption was predominately bidentate.
- Research Organization:
- Wisconsin Univ., Madison, WI (USA). Water Chemistry Program
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- FG02-87ER60508
- OSTI ID:
- 6454047
- Report Number(s):
- DOE/ER/60508-3; ON: DE91001304
- Country of Publication:
- United States
- Language:
- English
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A study of the physical-chemical mechanisms and variables which affect the transport of inorganic and organic heterogeneous systems: Progress report for period December 15, 1987--December 14, 1988
Research highlights subsurface transport program. Physical-chemical mechanisms affecting transport of inorganic/organic microcontaminants in heterogeneous systems
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
54 ENVIRONMENTAL SCIENCES
BENZOIC ACID
CARBOXYLIC ACID SALTS
ADSORPTION
GOETHITE
SORPTIVE PROPERTIES
PHENOLS
PHOSPHATES
PHTHALATES
AQUEOUS SOLUTIONS
CHELATES
ENVIRONMENTAL TRANSPORT
PH VALUE
PROGRESS REPORT
SOLIDS
SPECTROSCOPY
AROMATICS
CARBOXYLIC ACIDS
COMPLEXES
DISPERSIONS
DOCUMENT TYPES
HYDROXY COMPOUNDS
MASS TRANSFER
MINERALS
MIXTURES
MONOCARBOXYLIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDE MINERALS
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
SOLUTIONS
SORPTION
SURFACE PROPERTIES
400201* - Chemical & Physicochemical Properties
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)