Transformation of Trichloromethanes in Iron(ii)-Containing Environments
Cervini-Silva, Javiera
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https://hdl.handle.net/2142/83143
Description
Title
Transformation of Trichloromethanes in Iron(ii)-Containing Environments
Author(s)
Cervini-Silva, Javiera
Issue Date
1999
Doctoral Committee Chair(s)
Larson, Richard A.
Department of Study
Natural Resrouces and Environmental Sciences
Discipline
Natural Resrouces and Environmental Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biogeochemistry
Language
eng
Abstract
The oxidation state of structural Fe in clay minerals greatly alters the surface chemistry, and has a large impact on clay-organic interactions. RCCl3 were reacted with oxidized, reduced, and reoxidized forms of three different smectites, montmorillonite (Upton), ferruginous smectite (SWa-1), and nontronite (NG-1), in aqueous suspension. The adsorption rate of RCCl3 in clay minerals showed a strong correlation with the iron(II) content of the clay (r2 = 0.94). The clay surface behaves as a Bronsted base and promotes RCCl3 dehydrochlorination (elimination). The adsorption kinetics at the water-clay interface could be described by the formation of a precursor complex prior to RCCl3 dehydrochlorination.
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