Abstract
Sorption isotherms are essential for describing transport of solutes in
groundwater, and may be obtained in column experiments. In this paper a
novel algorithm for the numerical computation of the sorption isotherm
from the measured data is presented. The algorithm, which is quite
different from classical minimization algorithms like the Marquardt
process, uses the relative arrival times of dissolved components with a
different sorption behavior. It has a large domain of attraction, and it
is also rather inexpensive computationally. It is most effective as a
preprocessor for a classical minimization process. The applicability of
the algorithm is demonstrated on elution curves of K+,
displaced by Ca++ in a cation exchange reaction. The speed of
the algorithm allows for the use of the bootstrap method for obtaining
confidence domains for different sorption sites with different exchange
constants.
Original language | English |
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Pages (from-to) | 849-857 |
Journal | Water Resources Research |
Volume | 31 |
Issue number | 4 |
DOIs | |
Publication status | Published - 1995 |
Keywords
- Hydrology: Surface water quality
- Hydrology: Chemistry of fresh water