Mobility of isoproturon from an alginate-bentonite controlled release formulation in layered soil

Citation
M. Fernandez-perez et al., Mobility of isoproturon from an alginate-bentonite controlled release formulation in layered soil, CHEMOSPHERE, 41(9), 2000, pp. 1495-1501
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
CHEMOSPHERE
ISSN journal
0045-6535 → ACNP
Volume
41
Issue
9
Year of publication
2000
Pages
1495 - 1501
Database
ISI
SICI code
0045-6535(200011)41:9<1495:MOIFAA>2.0.ZU;2-N
Abstract
The mobility of isoproturon [3-(4-isopropylphenyl)-1,1-dimethylurea] from a n alginate-based controlled release (CR) formulation was investigated by us ing soil columns. A layered bed system simulating the typical arrangement u nder a plastic greenhouse, which is composed of sand, peat, amended soil an d native soil was used. The CR formulation was based on sodium alginate (1. 87%), isoproturon (1.19%), natural bentonite (3.28%), and water (93.66%), a nd was compared to technical grade isoproturon. The use of the alginate-ben tonite CR formulation produced less vertical mobility of the active ingredi ent as compared to the technical product. There was no presence of herbicid e in the leachate when the alginate-bentonite CR formulation was used. Howe ver, 0.90% of isoproturon appeared when the treatment was carried out with technical grade material. Isoproturon mobility was modelled using the progr amme CMLS, which showed the peat layer to retard pesticide leaching. Analys is of the soil columns showed the highest isoproturon concentration in the peat layer. (C) 2000 Elsevier Science Ltd. All rights reserved.