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Solubility‐Temperature Effect on the Adsorption of Gamma‐ and Beta‐BHC from Aqueous and Hexane Solutions by Soil Materials
Author(s) -
Mills A. C.,
Biggar J. W.
Publication year - 1969
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1969.03615995003300020016x
Subject(s) - adsorption , solubility , chemistry , hexane , freundlich equation , aqueous solution , muck , bentonite , nuclear chemistry , inorganic chemistry , organic chemistry , chemical engineering , geology , soil science , engineering
Freundlich adsorption isotherms were obtained for gamma‐ and beta‐isomers of 1,2,3,4,5,6‐hexachlorocyclohexane adsorbed from aqueous and hexane solvents on Ca‐Staten peaty muck, Ca‐bentonite Ca‐Venado clay, and silica gel in the temperature range of 10 to 40C. Comparison of normal and “corrected” isotherms revealed a significant effect on adsorption due to the influence of temperature on solubility. The 1/ n constants of the Freundlich equation increased with temperature according to the theory of dilute solutions. When the solubility effect is removed, the gamma isomer has greater adsorbability than the beta isomer, possibly because the former possesses a dipole moment whereas the latter does not. At constant solution fugacities, the gamma isomer on Staten peaty muck competed somewhat more effectively with hexane than with water.