Abstract
The fate of selected pesticides (bentazone, isoproturon, DNOC, MCPP, dichlorprop and 2,4-D) and a metabolite
(2,6-dichlorobenzamide (BAM)) was investigated under aerobic conditions in column experiments using aquifer material
and low concentrations of pesticides (approximately 25 lg/l). A solute transport model accounting for kinetic
sorption and degradation was used to estimate sorption and degradation parameters. Isoproturon and DNOC were
signi®cantly retarded by sorption, whereas the retardation of the phenoxy acids (MCPP, 2,4-D and dichlorprop), BAM
and bentazone was very low. After lag periods of 16±33 days for the phenoxy acids and 80 days for DNOC, these
pesticides were degraded quickly with 0.-order rate constants of 1.3±2.6 lg/l/day. None of the most probable degradation
products were detected. Ó 2000 Elsevier Science Ltd. All rights reserved.
Original language | English |
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Journal | Chemosphere |
Volume | 41 |
Issue number | 9 |
Pages (from-to) | 1485-1494 |
ISSN | 0045-6535 |
DOIs | |
Publication status | Published - 2000 |
Keywords
- Aquifer
- Aerobic degradation
- Pesticides
- Kinetic sorption
- Herbicides
- Column
- Modelling