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Dissipation of triadimefon on the solid/gas interface
J P Da Silva1, A M Da Silva, I V Khmelinskii
1FCT, Universidade do Algarve, Faro, Portugal. jpsilva@ualg.pt
Chemosphere
|November 7, 2001
Summary
Triadimefon dissipation primarily occurs through volatilization and photodegradation. Formulation fillers significantly impact volatilization but not photodegradation, with key photoproducts and mechanisms identified.
Area of Science:
- Environmental Chemistry
- Agrochemical Science
- Chemical Engineering
Background:
- Triadimefon is a widely used fungicide.
- Understanding its environmental fate is crucial for risk assessment.
- Dissipation pathways influence persistence and potential impact.
Purpose of the Study:
- To investigate the dissipation processes of triadimefon.
- To compare dissipation in pure form versus a commercial formulation.
- To identify key dissipation mechanisms and environmental factors.
Main Methods:
- Controlled and natural condition studies.
- Volatilization rate measurements.
- Photodegradation analysis and product identification.
Main Results:
- Volatilization and photodegradation are the primary dissipation routes.
- Volatilization follows an exponential decay model.
- Formulation fillers affect volatilization but not photodegradation.
- Major photoproducts were identified.
Conclusions:
- Triadimefon's environmental persistence is governed by volatilization and photodegradation.
- Formulation composition plays a key role in its environmental behavior.
- A reaction mechanism for triadimefon photodegradation was proposed.