The sorption of benzene, t6luene and o-xylene to wood, a common subsurface fill material, was characterized. Sorptive equilibrium was attained within 24 h for water-saturated Douglas fir and Ponderosa pine chips of centimeter-sized dimensions, consistent with predictions of retarded diffusive transfer into the wood. Sorption to the chips exhibited linear sorption isotherms. When wood-water partition coefficients were normalized to the wood's lignin content, the resulting lignin-water partition coefficients, K{sub}(lignin), agreed to within a factor of 2 with literature values reported for chemically isolated lignins. Wood sorption was substantially overpredicted by an organic carbon-based model (i.e., K{sub}(oc)). Wood-water partition coefficients for nonionic sorbates (10 < K{sub}(ow) < 10{sup}4) can be predicted as the product of the wood's fractional lignin content, f{sub}(lignin), and a K{sub}(lignin) estimated from the linear free energy relationship: log K{sub}(lignin) = (0.74 ± 0.09) log K{sub}(ow) - (0.04±0.25).
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