Isotherms
Article Abstract:
The fraction of trichloroethylene in sediment micropores increases with decreasing sorbed concentration. This was gleaned from heats of adsorption from different temperature desorption isotherm profiles. Aqueous phase isotherms were calculated from vapor phase desorption isotherms measured at 15, 30 and 60 degrees C for trichloroethylene on a silica gel and four natural solids at 100% relative humidity. Isosteric heats of adsorption were calculated as function of the sorbed concentration and examined with respect to adsorption on water wet mineral surfaces, sorption in amorphous organic matter and adsorption in hydrophobic micropores.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
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Kinetics
Article Abstract:
Slow desorption rates are controlled by activated diffusion in undulating pores, where sorptive forces at hydrophobic micropore constrictions control activated diffusion. Fast desorption is controlled by diffusion through aqueous filled mesopores, according to results of the modeling of the fast eluting fraction of trichloroethylene. These were gleaned from different temperature desorption kinetic profiles in a study of the effects of temperature on trichloroethylene desorption from silica gel and natural solids.
Publication Name: Environmental Science & Technology
Subject: Science and technology
ISSN: 0013-936X
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
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