| Title | DEGRADATION AND LEACHING OF THE HERBICIDES METOLACHLOR AND DIURON: A CASE STUDY IN AN AREA OF NORTHERN ITALY |
| Abstract | 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 mg/l, confirms the possibility that transient compounds can be leached if microbial activity has not completely occurred in active surface soil. |
| Source | Environmental pollution (1987) 134, pp. 525–534 |
| Journal | Environmental pollution (1987) |
| Editor | Elsevier Applied Science Publishers, Barking, Regno Unito |
| Year | 2005 |
| Type | Articolo in rivista |
| DOI | 10.1016/j.envpol.2004.08.014 |
| Authors | 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) |
| Text | 42159 2005 10.1016/j.envpol.2004.08.014 ISI Web of Science WOS 000226715600017 DEGRADATION AND LEACHING OF THE HERBICIDES METOLACHLOR AND DIURON A CASE STUDY IN AN AREA OF NORTHERN ITALY 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 a Water Research Institute, National Research Council, Via Reno 1, 00198 Rome, Italy; b Water Research Institute, National Research Council, Via della Mornera 25, Milan, Italy; c Istituto Superiore di Sanita`, Department of Environmental Hygiene, Viale Regina Elena 299, 00161 Rome, Italy 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 mg/l, confirms the possibility that transient compounds can be leached if microbial activity has not completely occurred in active surface soil. 134 ARTICOLO PUBBLICATO EnvironPollution2005.pdf Articolo in rivista Elsevier Applied Science Publishers 0269 7491 Environmental pollution 1987 Environmental pollution 1987 Environ. pollut. 1987 Environmental pollution 1987 paola.grenni GRENNI PAOLA POZZONI FIORENZO GIULIANO GIUSEPPE GENNARO liciamaria.guzzella GUZZELLA LICIA MARIA anna.barracaracciolo BARRA CARACCIOLO ANNA TA.P04.005.007 Strumenti di mitigazione dello stress quali quantitativo per i sistemi idrici |
