Handbook of Solvents - George Wypych - ChemTech - Ventech!

1166 William R. Roy
MPC, μg/L LC, mg/L Half-life, years
Methyl isobutyl ketone
Others
143 10.0 5
Carbon disulfide 830 1,000 10
Diethyl ether 55,000 1,000 5
Ethyl acetate 55,000 1,000 5
Pyridine 207 1,000 20
A mass-loading rate was conservatively calculated for each solvent as,
Mlr = Q× Cl
[17.2.1]
where:
Mlr the mass loading rate (mass/time/area),
Q calculated leachate flux (131.7 kL/year/hectare), and
Cl largest concentration of the solvent in leachate (mg/L)
17.2.2 MOVEMENT OF SOLVENTS IN GROUNDWATER
Ketones and alcohols have little tendency to be adsorbed by soil materials (see Section
17.1), and would appear at the compliance point only a few years after liner breakthrough
(Figure 17.2.2). Because the mass loading rates were held constant, the ketones and alcohols
assumed maximum steady-state concentrations after approximately 40 to 50 years
(Figure 17.2.3). These two classes of organic solvents degrade readily, reducing their
downgradient concentrations. The distribution of the benzene derivatives at the compliance
well depended substantially on their soil-water partition coefficients, their tendencies to de-
Figure 17.2.2. The predicted distribution of methyl ethyl
ketone (mg/L) in the aquifer 100 years after the leachate
has broken through the liner (Griffin and Roy 3 ).
Figure 17.2.3. The predicted concentrations of methyl
ethyl ketone, methanol, benzene, 1,1,1-trichloroethane,
ethyl acetate, and F-22 at the compliance point as a
function of time (Roy et al. 1 ).