Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Studies on mobility and degradation pathways of terbuthylazine using lysimeters on a field scale |
| Abstract | The degradation pathways of Terbuthylazine in agricultural soils were evaluated by following the appearance and mobility of its main transformation products: dealchylated and hydroxylated derivatives. Three experimental studies degradation in open field conditions were carried out in different hydraulic conditions: constant hydraulic head was achieved on the topsoil thus simulating the worst risk situation for aquifer, intermittent artificial precipitation simulated a medium risk situation, while natural precipitation represented the lowest risk condition. Concentrations of terbuthylazine transformation products derived from dealkylation and hydroxylation reactions were measured in lechates and soil samples collected during the three experiments. DET and DETH metabolites of Terbuthylazine were found to be the most leaching compounds and therefore can be considered as potential pollutants for aquifer contamination |
| Keywords | TerbuthylazineDealkyl derivativesHydroxyl derivativesDegradationLysimeter |
| Year | 2003 |
| Type | Articolo in rivista |
| Authors | GUZZELLA L.(1), RULLO S. (1), POZZONI F.(1), GIULIANO G. (1) |
| Text | 42066 2003 Terbuthylazine Dealkyl derivatives Hydroxyl derivatives Degradation Lysimeter Studies on mobility and degradation pathways of terbuthylazine using lysimeters on a field scale GUZZELLA L. 1 , RULLO S. 1 , POZZONI F. 1 , GIULIANO G. 1 CNR Istituto di Ricerca sulle Acque The degradation pathways of Terbuthylazine in agricultural soils were evaluated by following the appearance and mobility of its main transformation products dealchylated and hydroxylated derivatives. Three experimental studies degradation in open field conditions were carried out in different hydraulic conditions constant hydraulic head was achieved on the topsoil thus simulating the worst risk situation for aquifer, intermittent artificial precipitation simulated a medium risk situation, while natural precipitation represented the lowest risk condition. Concentrations of terbuthylazine transformation products derived from dealkylation and hydroxylation reactions were measured in lechates and soil samples collected during the three experiments. DET and DETH metabolites of Terbuthylazine were found to be the most leaching compounds and therefore can be considered as potential pollutants for aquifer contamination 32 Lo studio ha permesso di identificare quali siano i fattori principali che regolano la lisciviazione degli erbicidi dal suolo alla falda, in particolar modo caratteristiche chimico fisiche del composti applicato e dei suoi principali prodotti di trasformazione, caratteristiche chimico fisiche del suolo, regime delle precipitazioni. Lo studio potrebbe essere applicato anche in altre situazioni per prevedere il comportamento degli erbicidi Articolo in rivista GIULIANO GIUSEPPE GENNARO liciamaria.guzzella GUZZELLA LICIA MARIA |