Geoscience Reference
In-Depth Information
Fig. 8.12 Gas
chromatographs of residual
kerosene recovered from
glacial and post-glacial earth
materials after volatilization
at 5 and 27 C, for 30 and
7 days, respectively.
R denotes the total remaining
kerosene (percentage of
initial amount). Reprinted
from Jarsjo et al. (
1994
).
Copyright 1994 with
permission of Elsevier
dry soil. Roughly 30 % of the initial content of m-xylene still remained in the soil
after 18 days. Furthermore, the content of m-xylene increased somewhat after the
third day; a similar trend was found for the n-decane distribution. Hexadecane was
partially removed from deeper layers and redistributed near the soil surface.
8.3 Solubility and Dissolution
The solubility of contaminants in subsurface water is controlled by (1) the
molecular properties of the contaminant, (2) the porous media solid-phase com-
position, and (3) the chemistry of the aqueous solution. The presence of potential
cosolvents or other chemicals in water also affects contaminant solubility. A
number of relevant examples selected from the literature are presented here to
illustrate various solubility and dissolution processes.
