Author
Paula Munhoz Antunes
Bio: Paula Munhoz Antunes is an academic researcher from University of São Paulo. The author has contributed to research in topics: Simazine & Clomazone. The author has an hindex of 1, co-authored 1 publications receiving 81 citations.
Papers
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TL;DR: In this paper, residues of herbicides from sugarcane were monitored in waters and sediments of Corumbatai River and tributaries, with negligible levels of ametryne and glyphosate in sediment samples.
Abstract: SPATIAL-TEMPORAL DIAGNOSTIC OF HERBICIDE OCCURRENCE IN SURFACE WATERS AND SEDIMENTS OF CORUMBATAI RIVER AND MAIN AFFLUENTS. Residues of herbicides from sugarcane were monitored in waters and sediments of Corumbatai River and tributaries. Ametryne, atrazine, simazine, hexazinone, glyphosate, and clomazone were detected in water samples, with negligible levels of ametryne and glyphosate in sediment samples. The area of recharge of the Guarani aquifer presented the highest triazine and clomazone levels. The triazines were detected at higher levels, with atrazine above Brazil's potability and quality standards. Total herbicide levels at some sampling points were 13 times higher than the European Community potability limit. There is no Brazilian standard for ametryne, although the risk is larger due to ametryne's higher toxicity for the aquatic biota.
88 citations
Cited by
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TL;DR: The results presented in this work show that association of paraquat with alginate/chitosan nanoparticles alters the release profile of the herbicide, as well as its interaction with the soil, indicating that this system could be an effective means of reducing negative impacts caused by paraquats.
222 citations
TL;DR: In this article, a comprehensive literature review on the occurrence of pesticide residues in Brazilian freshwaters was provided, and risk quotients were calculated to assess the potential risk posed to aquatic life by the individual pesticides based on their levels of water contamination.
Abstract: The widespread use of pesticides in agriculture can lead to water contamination and cause adverse effects on non-target organisms. Brazil has been the world's top pesticide market consumer since 2008, with 381 approved pesticides for crop use. This study provides a comprehensive literature review on the occurrence of pesticide residues in Brazilian freshwaters. We searched for information in official agency records and peer-reviewed scientific literature. Risk quotients were calculated to assess the potential risk posed to aquatic life by the individual pesticides based on their levels of water contamination. Studies about the occurrence of pesticides in freshwaters in Brazil are scarce and concentrated in few sampling sites in 5 of the 27 states. Herbicides (21) accounted for the majority of the substances investigated, followed by fungicides (11), insecticides (10) and plant growth regulators (1). Insecticides are the class of major concern. Brazil would benefit from the implementation of a nationwide pesticide freshwater monitoring program to support preventive, remediation and enforcement actions.
140 citations
TL;DR: Results presented in this paper are promising, in view of the successful encapsulation of ametryn in PHB or PHBV polymer microparticles, and indications that this system may help reduce the impacts caused by the herbicide, making it an environmentally safer alternative.
115 citations
TL;DR: The persistence of atrazine in water (subchronic exposure) promoted an increase of LPO levels in the gills and increased the frequency and severity of histopathological changes, suggesting a mechanism to wash toxic substances away from the gill surface.
114 citations
TL;DR: In this paper, the potential health risk of these trace elements, glyphosate and coliform to local population were assessed using ICP-MS, while the glyphosate was analyzed by HPLC.
92 citations