Geoscience Reference
In-Depth Information
Fig. 8.6 Cumulative volatilization of
14
C-labeled pesticides and metabolites after soil surface
application on gleyic cambisol (Wolters et al.
2003
)
Fig. 8.7 Effect of a temperature and b soil moisture content on dieldrin vapor density (Taylor
and Spencer
1990
)
Temperature and moisture content are other important factors that control
volatilization of organic contaminants in the subsurface. Spencer and Cliath (
1969
,
1973
) showed that a temperature increase from 20 to 40 C led to an increase in
dieldrin vapor density from 45 to 700 ng/L (Fig.
8.7
a). It also may be observed
that a reduction in the soil moisture content caused a large reduction in the dieldrin
