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Determination of the surface sorption properties of talc, different salts, and clay minerals at various relative humidities using adsorption data of a diverse set of organic vapors
Author(s) -
Goss KaiUwe,
Buschmann Johanna,
Schwarzenbach René P.
Publication year - 2003
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1897/03-56
Subject(s) - sorption , talc , adsorption , sorbent , relative humidity , kaolinite , bentonite , clay minerals , chemistry , van der waals force , mineralogy , chemical engineering , environmental chemistry , organic chemistry , materials science , thermodynamics , molecule , physics , engineering , composite material
Adsorption constants of a diverse set of organic vapors have been measured on NaCl, KNO 3 , (NH 4 ) 2 SO 4 , NH 4 Cl, kaolinite, bentonite, and talc at different relative humidities at 15°C. Together with the earlier studied quartz (SiO 2 ), CaCO 3 , and α‐Al 2 O 3 , these surfaces represent relevant sorbents for organic vapors in the environment. An equation that describes the van der Waals and H‐bond interactions between the sorbate and the surface can be used to describe the sorbate and sorbent variability in the measured data and to predict sorption constants of organic compounds that have not been tested on the respective surface. The unknown properties of the sorbent surfaces are used as fitting parameters in this equation. These data provide important insights into the variability of sorption properties of natural, inorganic surfaces as a function of relative humidity.