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Nonequilibrium Sorption of Dimethylphthalate—Compatibility of Batch and Column Techniques
Author(s) -
Altfelder Sven,
Streck Thilo,
Maraqa Munjed A.,
Voice Thomas C.
Publication year - 2001
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/sssaj2001.651102x
Subject(s) - sorption , non equilibrium thermodynamics , tracer , thermodynamics , column (typography) , nonlinear system , chemistry , compatibility (geochemistry) , materials science , mathematics , physics , adsorption , nuclear physics , composite material , geometry , connection (principal bundle) , quantum mechanics
This study reconciles an apparent inconsistency between the dimethylphthalate (DMP) batch and column data reported in the literature. Some researchers found that retardation coefficients obtained by fitting a linear two‐stage model to column data were about 50% smaller than those calculated from the distribution coefficient of a 14‐d isotherm. In this study, sorption parameters were derived independently by fitting a linear and a nonlinear two‐stage model simultaneously to the 3‐ and 14‐d isotherms as well as to a sorption rate study reported by others. With the sorption parameters and the dispersion coefficient obtained from a tritium tracer experiment, the column data were adequately predicted. A major part of the differences in the retardation coefficients observed in other research could be related to experimental difficulties in detecting the tailing of nonequilibrium breakthrough curves.