Sorption of acetochlor, atrazine, 2,4-D, chlorotoluron, MCPA, and trifluralin in six soils from Slovakia.
Sorption of the herbicides (acetochlor, atrazine, 2,4-D: , chlorotoluron, MCPA and trifluralin) in their commercially available formulations was characterized on six agricultural soils from Slovakia. Weak acid herbicides (2,4-D: and MCPA) were the least sorbed, whereas weak base such as atrazine and nonionic herbicides were the most sorbed in the order: atrazine < acetochlor approximately chlorotoluron < trifluralin, which was closely related to the hydrophobicity of herbicides expressed as logKOW. The KF values positively correlated with soil organic carbon content for all herbicides. Moreover, all herbicides were the most sorbed by Vertisol with relatively high smectite clay content in proportion to organic carbon content. The KOC values for each herbicide showed a smaller variation among soils (excluding Vertisol) than the KF and were used to compare soil mobility potential of herbicides.
Hiller
Edgar
E
Department of Geochemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, 842 15 Bratislava 4, Slovak Republic. hiller@fns.uniba.sk
Krascsenits
Zoltán
Z
Cernanský
Slavomír
S
D015084:2,4-Dichlorophenoxyacetic Acid / Q000032:analysis / Q000737:chemistry; D008456:2-Methyl-4-chlorophenoxyacetic Acid / Q000032:analysis / Q000737:chemistry; D000327:Adsorption; D000383:Agriculture; D001280:Atrazine / Q000032:analysis / Q000737:chemistry; D004784:Environmental Monitoring; D006540:Herbicides / Q000032:analysis / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis / Q000737:chemistry*; D010671:Phenylurea Compounds / Q000032:analysis / Q000737:chemistry; D018154:Slovakia; D012989:Soil Pollutants / Q000032:analysis / Q000737:chemistry*; D014052:Toluidines / Q000032:analysis / Q000737:chemistry; D014274:Trifluralin / Q000032:analysis / Q000737:chemistry
D006540:Herbicides; D010573:Pesticide Residues; D010671:Phenylurea Compounds; D012989:Soil Pollutants; D014052:Toluidines; D015084:2,4-Dichlorophenoxyacetic Acid; C043377:acetochlor; D014274:Trifluralin; D008456:2-Methyl-4-chlorophenoxyacetic Acid; D001280:Atrazine; C007033:chlortoluron