Variation of MCPA, metribuzine, methyltriazine-amine and glyphosate degradation, sorption, mineralization and leaching in different soil horizons

Carsten S. Jacobsen, Peter van der Keur, Bo V. Iversen, Per Rosenberg, Heidi C. Barlebo, Søren Torp, Henrik Vosgerau, René K. Juhler, Vibeke Ernstsen, Jim Rasmussen, Ulla Catrine Brinch, Ole Hørbye Jacobsen

Research output: Contribution to journalArticleResearchpeer-review

37 Citations (Scopus)

Abstract

Pesticide mineralization and sorption were determined in 75 soil samples from 15 individually drilled holes through the vadose zone along a 28 km long transect of the Danish outwash plain. Mineralization of the phenoxyacetic acid herbicide MCPA was high both in topsoils and in most subsoils, while metribuzine and methyltriazine-amine was always low. Organic matter and soil pH was shown to be responsible for sorption of MCPA and metribuzine in the topsoils. The sorption of methyltriazine-amine in topsoil was positively correlated with clay and negatively correlated with the pH of the soil. Sorption of glyphosate was tested also high in the subsoils. One-dimensional MACRO modeling of the concentration of MCPA, metribuzine and methyltriazine-amine at 2 m depth calculated that the average concentration of MCPA and methyltriazine-amine in the groundwater was below the administrative limit of 0.1 μg/l in all tested profiles while metribuzine always exceeded the 0.1 μg/l threshold value.

Original languageEnglish
Pages (from-to)794-802
Number of pages9
JournalEnvironmental Pollution
Volume156
Issue number3
DOIs
Publication statusPublished - Dec 2008

Keywords

  • Groundwater contamination
  • Herbicides
  • MACRO modeling
  • Spatial variation
  • Vadose zone

Programme Area

  • Programme Area 2: Water Resources

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