Degradation and leaching of the herbicides metolachlor and diuron: a case study in an area of Northern Italy
| Autor: | Paola Bottoni, A. Crobe, G. Giuliano, Luca Fava, Enzo Funari, A. Barra Caracciolo, F. Pozzoni, Licia Guzzella, Paola Grenni, Maria Antonietta Orrù |
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| Rok vydání: | 2005 |
| Předmět: |
Health
Toxicology and Mutagenesis Fresh Water Toxicology chemistry.chemical_compound Acetamides Water Pollution Chemical Soil Pollutants Leaching (agriculture) Water pollution Hydrology Aniline Compounds Herbicides Lessivage Agriculture General Medicine Pollution Soil contamination Biodegradation Environmental Italy chemistry Diuron Lysimeter Environmental chemistry Soil water Environmental science Metolachlor Groundwater Environmental Monitoring |
| Zdroj: | Environmental pollution (1987) 134 (2005): 525–534. doi:10.1016/j.envpol.2004.08.014 info:cnr-pdr/source/autori:BARRA CARACCIOLO A. (a); GIULIANO G. (a); GRENNI P. (a); GUZZELLA L. (b); POZZONI F. (b); BOTTONI P. (c); FAVA L. (c); CROBE A. (c); ORRÙ M. (c); FUNARI E. (c)/titolo:DEGRADATION AND LEACHING OF THE HERBICIDES METOLACHLOR AND DIURON: A CASE STUDY IN AN AREA OF NORTHERN ITALY/doi:10.1016%2Fj.envpol.2004.08.014/rivista:Environmental pollution (1987)/anno:2005/pagina_da:525/pagina_a:534/intervallo_pagine:525–534/volume:134 |
| ISSN: | 0269-7491 |
| Popis: | In this work the degradation of the herbicides metolachlor, diuron, monuron and of the metabolites 2-ethyl-6-methylaniline (EMA), and 3,4-dichloroaniline (DCA) was assessed in laboratory experiments on microbiologically active and sterilized soils. Their leaching potentials were calculated, using Gustafson's equation, by determining their mobility (as Koc) and persistence (expressed as DT50). Lysimeter experiments were also conducted to assess the actual leaching of the studied herbicides in a cereal crop tillage area vulnerable to groundwater contamination. The data obtained from the field were compared to the laboratory results. Moreover, some compounds of particular concern were searched for in the groundwater located near the experimental area in order to evaluate actual contamination and to test the reliability of the leaching potential. The GUS index, computed on data from microbiologically active soil, shows monuron as a leacher compound, EMA and DCA as non-leachers, metolachlor and diuron as transient ones. The presence of metolachlor in the groundwater monitored, even at concentrations up to 0.1 μg/l, confirms the possibility that transient compounds can be leached if microbial activity has not completely occurred in active surface soil. |
| Databáze: | OpenAIRE |
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