Sorption of chlorinated solvents and degradation products on natural clayey tills

摘要: Abstract The sorption of chlorinated solvents and degradation products on seven natural clayey till samples from three contaminated sites was investigated by laboratory batch experiments in order to obtain reliable coefficients ( K d values). isotherms for all compounds were nearly linear, but fitted Freundlich slightly better over the entire concentration range. For chloroethylenes, tetrachloroethylene (PCE) most strongly sorbed = 0.84–2.45 L kg −1 ), followed trichloroethylene (TCE, = 0.62–0.96 L kg cis-dichloroethylene (cis-DCE, = 0.17–0.82 L kg ) vinyl chloride (VC, = 0.12–0.36 L kg ). chloroethanes, 1,1,1-trichloroethane (1,1,1-TCA) = 0.2–0.45 L kg 1,1-dichloroethane (1,1-DCA, = 0.16–0.24 L kg chloroethane (CA, = 0.12–0.18 L kg This is consistent with hydrophobicity compounds. octanol–water coefficient (log  ow correlated log  values than oc indicating that may be independent actual organic carbon content f estimated or determined regression data this study significantly higher previously published empirical relationships. site specific as well new relationship compared calculations water soil core cis-DCE VC Rugardsvej site. In conclusion, a wide range ethenes ethanes – line previous studies PCE TCE suggest tills could typically expected.