Geoscience Reference
In-Depth Information
Fig. 16.28 Dissolved-phase
concentration plumes
showing 0.5, 0.15, and 0.015
(and 0.0015 for last four
TCM dates) contours. The
inner, darkest shade contour
is the maximum
concentration. The source is
1 m upgradient of the
1 9 1.5 m areal faces shown
here, and groundwater flow
directions relative to north
(normal to source face) are
also shown. Reprinted with
permission from Rivett and
Feenstra (
2005
). Copyright
2005 American Chemical
Society
groundwater flow direction. The dissolution patterns of the various components
differ spatially and temporally, according to their chemical properties, despite the
relative homogeneity of the source and aquifer.
Volatilization of the light fraction of a liquid mixture in the subsurface brings
about changes in both the physical and chemical properties of the residual liquid.
This process is illustrated in a series of experiments investigating kerosene
behavior (e.g., Dror et al.
2000
,
2001
,
2002
; Fine and Yaron,
1993
; Galin et al.
1990
; Gerstl et al.
1994
; Jarsjo et al.
1994
,
1997
; Yaron et a1.
1998
). The dif-
ferential composition of kerosene during volatilization by up to 50 % (w/w),
