Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin
The Argentine stretch of the del Plata basin crosses regions devoted to extensive and intensive agriculture mostly with chemical pest control. The utilization of pesticides in the region has increased 900% in the last two decades associated with the introduction of biotech crops and direct-seeding t...
| Autores principales: | , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2017
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/104003 |
| Aporte de: |
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I19-R120-10915-104003 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Biología GC-μECD Pesticide fate Environmental partitioning Water/sediment |
| spellingShingle |
Biología GC-μECD Pesticide fate Environmental partitioning Water/sediment Etchegoyen, María Agustina Ronco, Alicia Estela Almada, Pablo Abelando, Mariana Marino, Damián José Gabriel Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| topic_facet |
Biología GC-μECD Pesticide fate Environmental partitioning Water/sediment |
| description |
The Argentine stretch of the del Plata basin crosses regions devoted to extensive and intensive agriculture mostly with chemical pest control. The utilization of pesticides in the region has increased 900% in the last two decades associated with the introduction of biotech crops and direct-seeding techniques. Our objective was to study the occurrence, concentration, and fate of pesticides in surface water and bottom sediments of the principal tributaries and main watercourse of the Paraguay-Paraná River. We sampled 22 sites in the distal positions of the main affluents and main watercourse of the Paraná and report here results from two monitoring campaigns (2010–2012). Surface water and bottom sediments were analyzed according to standardized methods by matrix-solid-phase dispersion and liquid-liquid extraction, respectively. Twenty-three pesticide compounds were analyzed by gas chromatography.
The results from both campaigns indicated a generalized but variable distribution in the concentrations detected throughout the basin. The ranges of total measured pesticide concentrations in water and sediments were, respectively, 0.004–6.62 μg/l and 0.16–221.3 μg/ kg dry weight. Endosulfans, cypermethrin, and chlorpyrifos were ubiquitous compounds in both environmental compartments and quantitatively the most relevant.
All concentrations detected in water were over the recommended guidelines for the protection of aquatic biota. The partitioning indicated a higher affinity for the sediments. Agricultural activity is the source of pesticide-pollution loads, transported by tributaries that reach the main watercourse and alter the quality of the aquatic ecosystem. |
| format |
Articulo Articulo |
| author |
Etchegoyen, María Agustina Ronco, Alicia Estela Almada, Pablo Abelando, Mariana Marino, Damián José Gabriel |
| author_facet |
Etchegoyen, María Agustina Ronco, Alicia Estela Almada, Pablo Abelando, Mariana Marino, Damián José Gabriel |
| author_sort |
Etchegoyen, María Agustina |
| title |
Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| title_short |
Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| title_full |
Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| title_fullStr |
Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| title_full_unstemmed |
Occurrence and fate of pesticides in the Argentine stretch of the Paraguay-Paraná basin |
| title_sort |
occurrence and fate of pesticides in the argentine stretch of the paraguay-paraná basin |
| publishDate |
2017 |
| url |
http://sedici.unlp.edu.ar/handle/10915/104003 |
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Repositorios |
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