English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Paraquat is an herbicide widely applied to agriculture in Brazil. As it has human toxic properties, it is of great interest for public health to evaluate water contamination, especially when the local population consumes water from aquifer springs near crops. Paraquat concentrations were assessed in surface waters of a stream that crosses a rural area of intensive agricultural production in the mountainous region of Rio de Janeiro. Water samples were collected at 7 sampling sites (n=84) during 1 year, and paraquat concentrations were determined by ELISA. Residues were found in 62.5% of the samples. The sampling point located closest to the plantation area was the most frequently contaminated (average 0.075μg/L; maximum 0.279μg/L). The local rainfall regime seems to be an important predictor of paraquat contamination according to Spearman’s correlation coefficient (R=0.7053; p=0.0128). The results suggest that paraquat residues in water represent a distinct threat to human and environmental health, especially after rainy periods.

Paraquat Contamination in Surface Waters of a Rural Stream in the Mountain Region in the State of Rio De Janeiro Southeastern Brazil