Document Detail


Pesticides in surface water, sediment, and rainfall of the northeastern Pantanal basin, Brazil.
MedLine Citation:
PMID:  12371181     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Within the last 25 years an intensive agriculture has developed in the highland regions of Mato Grosso state (Brazil), which involves frequent pesticide use in highly mechanized cash-crop cultures. To provide information on pesticide distribution and dynamics in the northeastern Pantanal basin (located in southern Mato Grosso), we monitored 29 pesticides and 3 metabolites in surface water, sediment, and rainwater of the study area during the main application season. In environmental samples, 19 pesticides and 3 metabolites were detected in measurable quantities, resulting in at least one pesticide detection in 68% of surface water samples (n = 139), 62% of sediment samples (n = 26), and 87% of rainwater samples (n = 91). Surface water samples were most frequently contaminated by endosulfan compounds (alpha-, beta-, -sulfate), ametryn, metolachlor, and metribuzin, although in low (< 0.1 microgram L-1) concentrations. Sediment samples exhibited concentrations up to 4.5 micrograms kg-1 of p,p'-DDT, p,p'-DDE, endosulfan-sulfate, beta-endosulfan, and ametryn. In contrast, rainwater was polluted with substantial amounts of endosulfan, alachlor, metolachlor, trifluralin, monocrotofos, and profenofos (maximum concentrations = 0.3 to 2.3 micrograms L-1) in the highlands. Lowland rainwater samples taken 75 km from the next application area contained 5- to 10-fold lower mean pesticide concentration than in the highlands. Cumulative deposition rates of the pesticide sum within the study period ranged from 423 micrograms m-2 in the highlands to 14 micrograms m-2 in the lowlands. The atmospheric input of pesticides to ecosystems seemed to be of higher relevance in the tropical study area than known from temperate regions.
Authors:
Volker Laabs; Wulf Amelung; Alicio A Pinto; Matthias Wantzen; Carolina J da Silva; Wolfgang Zech
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental quality     Volume:  31     ISSN:  0047-2425     ISO Abbreviation:  J. Environ. Qual.     Publication Date:    2002 Sep-Oct
Date Detail:
Created Date:  2002-10-09     Completed Date:  2003-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0330666     Medline TA:  J Environ Qual     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1636-48     Citation Subset:  IM    
Affiliation:
Institute of Soil Science and Soil Geography, University of Bayreuth, D-95440 Bayreuth, Germany. volker.laabs@covance.com
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MeSH Terms
Descriptor/Qualifier:
Agriculture
Brazil
Environmental Monitoring
Geologic Sediments / chemistry*
Pesticides / analysis*
Rain
Tropical Climate
Water Pollutants, Chemical / analysis*
Chemical
Reg. No./Substance:
0/Pesticides; 0/Water Pollutants, Chemical

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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