title: Sorption behavior of nonylphenol in terrestrial soils.
abstract: Nonylphenol (NP) as an intermediate from anaerobic degradation of widely used nonionic surfactants occurs widespread in the environment. Partition behavior of this toxic and endocrine-disrupting chemical between soil and water was not examined until yet. The objective of this investigation was to quantify sorption and desorption behavior of 4-nonyl[14C]phenol in a set of 51 soils using the batch equilibrium approach. Kinetic studies indicated apparent equilibrium within 20 h. Sorption was influenced by sorbate structure as could be shown with branched 4-nonyl[14C]phenol and the linear 4-n-NP, respectively. Linear 4-n-NP behaves differently from the branched isomers of 4-NP. Sorption of 4-nonyl[14C]phenol tested with five different initial concentrations resulted in linearly fitted isotherms that provided calculation of sorption partition coefficients (KP). Desorption partition coefficients (KP-des) revealed hysteresis independent of soil properties but decreasing with decreasing initial NP concentrations. KP values were correlated with organic carbon content of the soils yielding a log KOC of 3.97.
authors.affiliation: Department of Agricultural Ecology and Natural Resources Management, Division of Waste Management and Environmental Research, Justus-Liebig-University, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany. rolf-alexander.duering@agrar.uni-giessen.de
authors.forename: Rolf-Alexander
authors.initials: RA
authors.lastname: Düring
authors.forename: Sebastian
authors.initials: S
authors.lastname: Krahe
authors.forename: Stefan
authors.initials: S
authors.lastname: Gäth
mesh_terms: D000327:Adsorption; D007700:Kinetics; D010636:Phenols / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*; D013696:Temperature
chemical_list: D010636:Phenols; D012989:Soil Pollutants; C025256:nonylphenol