title: Pesticide adsorption in relation to soil properties and soil type distribution in regional scale.
abstract: Study was focused on the evaluation of pesticide adsorption in soils, as one of the parameters, which are necessary to know when assessing possible groundwater contamination caused by pesticides commonly used in agriculture. Batch sorption tests were performed for 11 selected pesticides and 13 representative soils. The Freundlich equations were used to describe adsorption isotherms. Multiple-linear regressions were used to predict the Freundlich adsorption coefficients from measured soil properties. Resulting functions and a soil map of the Czech Republic were used to generate maps of the coefficient distribution. The multiple linear regressions showed that the K(F) coefficient depended on: (a) combination of OM (organic matter content), pH(KCl) and CEC (cation exchange capacity), or OM, SCS (sorption complex saturation) and salinity (terbuthylazine), (b) combination of OM and pH(KCl), or OM, SCS and salinity (prometryne), (c) combination of OM and pH(KCl), or OM and ρ(z) (metribuzin), (d) combination of OM, CEC and clay content, or clay content, CEC and salinity (hexazinone), (e) combination of OM and pH(KCl), or OM and SCS (metolachlor), (f) OM or combination of OM and CaCO(3) (chlorotoluron), (g) OM (azoxystrobin), (h) combination of OM and pH(KCl) (trifluralin), (i) combination of OM and clay content (fipronil), (j) combination of OM and pH(KCl), or OM, pH(KCl) and CaCO(3) (thiacloprid), (k) combination of OM, pH(KCl) and CEC, or sand content, pH(KCl) and salinity (chlormequat chloride).
authors.affiliation: Czech University of Life Sciences Prague, Department of Soil Science and Soil Protection, Prague, Czech Republic. kodesova@af.czu.cz
authors.forename: Radka
authors.initials: R
authors.lastname: Kodešová
authors.forename: Martin
authors.initials: M
authors.lastname: Kočárek
authors.forename: Vít
authors.initials: V
authors.lastname: Kodeš
authors.forename: Ondřej
authors.initials: O
authors.lastname: Drábek
authors.forename: Josef
authors.initials: J
authors.lastname: Kozák
authors.forename: Kateřina
authors.initials: K
authors.lastname: Hejtmánková
mesh_terms: D000327:Adsorption; D010575:Pesticides / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D010575:Pesticides; D012987:Soil; D012989:Soil Pollutants