title: Sorption of selected organic pollutants in Danish soils.
abstract: The sorption of benzoic acid, nitrobenzene, 4-nitrophenol, 2,4-dichlorophenoxyacetic acid (2,4-D), and naphthalene was determined for 10 Danish soils in laboratory studies. Measured equilibrium isotherms were of nonlinear Freundlich type for nearly all combinations of soil-test compounds. Adsorption was significantly correlated with the organic carbon content of the soils tested. No significant correlations with pH and cation-exchange capacity were observed. The adsorption of benzoic acid was found to be reversible and the sorption of naphthalene was reversible in 4 of 10 soils. A desorption-resistant fraction of adsorbed 2,4-D was estimated from interdependent adsorption and desorption isotherms.
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000032:analysis; D000327:Adsorption; D001565:Benzoates / Q000032:analysis; D019817:Benzoic Acid; D003718:Denmark; D009578:Nitrobenzenes / Q000032:analysis; D009596:Nitrophenols / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis; D012987:Soil / Q000032:analysis; D012989:Soil Pollutants / Q000032:analysis*; D013696:Temperature
chemical_list: D001565:Benzoates; D009578:Nitrobenzenes; D009596:Nitrophenols; D012987:Soil; D012989:Soil Pollutants; D015084:2,4-Dichlorophenoxyacetic Acid; D019817:Benzoic Acid; D011078:Polychlorinated Biphenyls; C036077:nitrobenzene; C024836:4-nitrophenol