Multicomponent Equilibrium Thermodynamics - Elements of Environmental Engineering: Thermodynamics and Kinetics - page 116

insidehomescanbemuchhigherthanfromsamplescollectedfromoutside
homes within the same neighborhoods. One such example is chlordane, a
common organochlorine pesticide, detected in the sediment in homes at
high concentrations. A concern arises about the potential for this species
to volatilize from the sediment and be found in the vapor phase inside
homes. Additionally, the high concentration of mold spores represents
another sink for these particles from the gas phase, and returning residents
and first responders can inhale both air inside the home and aerosolized
mold spores. Using a level I fugacity model, determine the concentration
of chlordane present in both the gas phase ( μ g/m 3 ) and the aerosol phase
(mg/kgmoldspores)insidehomes.Assume100 gofchlordaneasthebasis.
For the aerosolized phase, the fugacity capacity is given by the following
equation:
Z Q = 10 ( log K oa + log f om − 11.91 ) Z air ρ Q × 10 9 .
Data required are f om = 0.60 (fraction of organic matter in the aerosol),
aerosol (mold spore) density, ρ Q = 5.31 × 10 − 18 kg/m 3 , T = 291.3 K,
sedimentdensity = 2.5 g/cm 3 .Volumesofphases: V air = 401.6 m 3 , V Q =
6.7 × 10 − 8 m 3 , V sediment = 0.329 m 3 . For chlordane: molecular weight
is 409.8, log K ow = 5.08, octanol-air partition constant, log K oa = 8.872,
density = 1.6 g/cm 3 , K aw = 4.91 Pa m 3 /mol, sediment-water partition
constant, K SW = 4265 L/kg.
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