Am. Mear et al., ADSORPTION MECHANISMS OF CARBOFURAN ON SILICA - STRUCTURE, KINETICS, AND SOLUBILITY INFLUENCE, Ecotoxicology and environmental safety, 35(2), 1996, pp. 163-173
The adsorption processes of carbofuran from solutions in pure water on
to silica (Aerosil 200) have been determined in order to bring greater
coherence to previous results obtained directly on soils. Adsorption
isotherms and their evolution with temperature reveal that adsorption
is generally weak, increases with temperature, and does so significant
ly with concentration when the solubility limit is approached. Kinetic
s of dissoving, of adsorption on silica, and of desorption all obey an
irreversible two-compartment model. Desorption rate Is slower than ad
sorption rate. Consequences on the behavior of carbofuran in the envir
onment are discussed. (C) 1996 Academic Press, Inc.