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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cheyns, K. Mertens, J. Diels, J. Smolders, E. Springael, D. |
| Description | Country affiliation: Belgium Author Affiliation: Cheyns K ( Division soil and water management, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, B-3001 Heverlee, Belgium. Karlien.Cheyns@ees.kuleuven.be) |
| Abstract | Pesticide transport models commonly assume first-order pesticide degradation kinetics for describing reactive transport in soil. This assumption was assessed in mini-column studies with associated batch degradation tests. Soil mini-columns were irrigated with atrazine in two intermittent steps of about 30 days separated by 161 days application of artificial rain water. Atrazine concentration in the effluent peaked to that of the influent concentration after initial break-through but sharply decreased while influx was sustained, suggesting a degradation lag phase. The same pattern was displayed in the second step but peak height and percentage of atrazine recovered in the effluent were lower. A Monod model with biomass decay was successfully calibrated to this data. The model was successfully evaluated against batch degradation data and mini-column experiments at lower flow rate. The study suggested that first-order degradation models may underestimate risk of pesticide leaching if the pesticide degradation potential needs amplification during degradation. |
| File Format | HTM / HTML |
| ISSN | 02697491 |
| Issue Number | 5 |
| Journal | Environmental Pollution |
| Volume Number | 158 |
| e-ISSN | 18736424 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2010-05-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Discipline Science Atrazine Chemistry Pesticides Soil Pollutants Kinetics Models, Chemical Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Health, Toxicology and Mutagenesis Pollution Medicine Toxicology |
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