In-situ CIR-FTIR (cylindrical internal reflection/Fourier transform infrared) characterization of salicylate complexes at the goethite/aqueous solution interface
Journal Article
·
· Environmental Science and Technology; (United States)
- Univ. of Wisconsin, Madison (USA)
The types of complexes that salicylate (2-hydroxy-benzoate) forms with the surface of goethite ({alpha}-FeOOH) in aqueous medium were studied in situ by using cylindrical internal reflection (CIR) Fourier transform infrared (FTIR) spectroscopy. Results obtained from CIR-FTIR studies were compared with adsorption isotherm experiments in order to relate the level of salicylate coverage to the nature of the surface complex. At lower surface coverages all the interfacial salicylate has a chelate structure in which one carboxylic oxygen and the ortho phenolic oxygen bind one Fe atom of the goethite surface. At higher surface coverages this chelate complex coexists with salicylate ions, which are weakly bound in the double layer.
- OSTI ID:
- 5466448
- Journal Information:
- Environmental Science and Technology; (United States), Journal Name: Environmental Science and Technology; (United States) Vol. 24:6; ISSN ESTHA; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION ISOTHERMS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DISPERSIONS
GOETHITE
HYDROXY ACIDS
INFRARED SPECTRA
ISOTHERMS
MINERALS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDE MINERALS
SALICYLIC ACID
SOIL CHEMISTRY
SOLUTIONS
SPECTRA
SURFACE PROPERTIES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION ISOTHERMS
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DISPERSIONS
GOETHITE
HYDROXY ACIDS
INFRARED SPECTRA
ISOTHERMS
MINERALS
MIXTURES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDE MINERALS
SALICYLIC ACID
SOIL CHEMISTRY
SOLUTIONS
SPECTRA
SURFACE PROPERTIES