Surface adsorption and photo-reactivity of sulfonylurea herbicides

This item is provided by the institution :
University of Ioannina
Repository :
Repository of UOI Olympias
see the original item page
in the repository's web site and access all digital files if the item*

2002 (EN)
Surface adsorption and photo-reactivity of sulfonylurea herbicides (EN)

Albanis, T. A. (EN)

Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας (EL)
Albanis, T. A. (EN)

Photodegradation of two sulfonylurea herbicides, triasulfuron and thifensulfuron-methyl adsorbed on Preveza or Nea Malgara soils (Greece) was studied in outdoor and laboratory experiments. Herbicides on adsorbed phase and kept in the dark were characterised by a high reactivity, giving depletion curves that can be all described by a first order equation. In the irradiation experiments the kinetic behaviour of photodegradation was complex and characterised by a double step photoreaction. After a first period varying from 8 to 24 h the rate of reaction was reduced to 7-31% of the initial rate. The kinetic constant related to the degradation of triasulfuron practically showed the same values of those obtained for thifensulfuron-methyl. The half-lives obtained on Nea Malgara soil were generally higher than those obtained using Preveza soil. The observed behaviour is explained considering the photochemical properties of the herbicides, and the organic matter content of the soils. (EN)

triasulfuron (EN)

Πανεπιστήμιο Ιωαννίνων (EL)
University of Ioannina (EN)

International Journal of Environmental Analytical Chemistry (EN)



<Go to ISI>://000179634000007

Taylor & Francis (EN)

*Institutions are responsible for keeping their URLs functional (digital file, item page in repository site)