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Environmental fate & pathways

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Carbon tetrachloride has a moderate potential for adsorption in soil, from the results of an experimental study (Koc about 115). An experimental determination of HLC has been carried out by Munz (1987), who determined H = 2370 Pa.m3/mol at 20°C. A supporting value of 2990 Pa.m3/mol at 25°C can be found in a handbook.

According to fugacity model level I, more than 99% of the substance will partition to the atmosphere (Thompson et al., 2004).

According to a fugacity model level III, at steady state, with default values, the partitioning is as follows (Epiwin V.4):

Volatilization from Water:

Henry LC: 0.0276 atm-m3/mole (Henry experimental database)

Half-Life from Model River:     1.292 hours

Half-Life from Model Lake :     118.1 hours  (4.92 days)


Removal In Wastewater Treatment:

Total removal:             91.57 percent

Total biodegradation:       0.03 percent

Total sludge adsorption:    2.02 percent

Total to Air:              89.51 percent

(using 10000 hr Bio P,A,S)


Level III Fugacity Model:

Mass Amount   Half-Life   Emissions

(percent)       (hr)      (kg/hr)

Air      49.4           1e+005      1000

Water    47.8           1.44e+003   1000

Soil     2.64           2.88e+003   1000

Sediment 0.196          1.3e+004    0

Persistence Time: 177 hr