Soil adsorption of 2,4‐D as affected by the clay mineralogy

The adsorption of 2,4‐D has been studied obtaining adsorption isotherms on 22 soils by the batch equilibration technique. Fitting the adsorption data to the Freundlich equation three adsorption capacity were calculated at low (Kf or Cs 1), medium (Cs4.5) and high (Cs 30) 2,4‐D concentration. The adsorption capacity and intensity factors obtained in this study resulted in according with those reported by other authors. From the simple regression analysis between adsorption capacities and soil properties it was shown that organic matter and free iron contents of soils favoured the adsorption, whereas pH, surface area and clay content decreased the adsorption of 2,4‐D. By dividing the soils according to their clay mineralogy it was shown that the soils properties determining the adsorption capacity were different for soils with phyllosilicates as essential clay components than for soils with iron oxides as major clay components.

[1]  M. C. Hermosín,et al.  Assessing factors related to pesticide adsorption by soils , 1989 .

[2]  P. Nicholls.  Factors influencing entry of pesticides into soil water , 1988 .

[3]  M. C. Hermosín,et al.  Maleic hydrazide adsorption by soils and the use of the mole fraction form of the Freundlich equation , 1987 .

[4]  M. C. Hermosín,et al.  ADSORPTION AND DESORPTION OF MALEIC HYDRAZIDE AS A FUNCTION OF SOIL PROPERTIES , 1987 .

[5]  Allan Walker,et al.  Evaluation of a simulation model for prediction of herbicide movement and persistence in soil , 1987 .

[6]  T. R. Roberts,et al.  Pesticide science and biotechnology : proceedings of the Sixth International Congress of Pesticide Chemistry, held in Ottawa, Canada, 10-15 August, 1986 , 1987 .

[7]  T. E. Short,et al.  A Mathematical Model for the Fate of Hazardous Substances in Soil: Model Description and Experimental Results , 1987 .

[8]  J. Weber,et al.  Fluridone Retention and Release in Soils , 1986 .

[9]  R. Wagenet,et al.  Basic Concepts of Modeling Pesticide Fate in the Crop Root Zone , 1985, Weed science.

[10]  H. Løkke.  Sorption of selected organic pollutants in Danish soils. , 1984, Ecotoxicology and environmental safety.

[11]  P. Huang,et al.  COMPONENTS AND PARTICLE SIZE FRACTIONS INVOLVED IN ATRAZINE ADSORPTION BY SOILS1 , 1984 .

[12]  M. Martín,et al.  Adsorción de azinfosmetil por suelos , 1984 .

[13]  W. F. Spencer,et al.  Behavior Assessment Model for Trace Organics in Soil: I. Model Description , 1983 .

[14]  W. Fuller,et al.  ADSORPTION OF SOME MONOHYDROXYBENZENE DERIVATIVES BY SOILS , 1982 .

[15]  R. Bladel,et al.  [Analyse statistique correlative de l'influence des proprietes des sols sur l'adsorption d'herbicides et insecticides] , 1982 .

[16]  R. Bladel,et al.  Behavior of 2,4‐D in Belgian Soils , 1980 .

[17]  J. Amonette,et al.  Nonionic surfactant effects on adsorption and degradation of 2,4-D. , 1980 .

[18]  J. Quirk,et al.  The adsorption of phenoxyacetic acid herbicides on goethite , 1977 .

[19]  J. Quirk,et al.  ADSORPTION OF THE HERBICIDE 2,4‐D ON GOETHITE , 1973 .