Glyphosate and atrazine in rainfall and soils in agroproductive areas of the pampas region in Argentina

The Science of the Total Environment
Lucas L AlonsoDamián J G Marino

Abstract

The presence in the atmosphere of glyphosate (GLP) and atrazine (ATZ) was investigated-those pesticides dominating the market in Argentina-through rain, as the main climatic phenomenon associated with wet deposition, both through analyzing source-receptor relationships with soil along with the climatic influences that may condition that transport and through estimating the annual deposition on the surface of the Argentine pampas. Rainwater samples (n = 112) were collected throughout each rainfall in urban areas of the pampas having different degrees of land use and with extensive crop production plus subsurface-soil samples (n = 58) from the relevant periurban sites. The herbicides-analyzed by liquid-chromatography-mass-spectrometry-were detected in >80% of the rain samples at median-to-maximum concentrations of 1.24-67.3 μg·L-1 (GLP) and 0.22-26.9 μg·L-1(ATZ), while aminomethylphosphonic acid (AMPA) was detected at 34% (0.75-7.91 μg·L-1). In soils, GLP was more frequently registered (41%; 102-323 μg·kg-1) followed by ATZ (32%; 7-66 μg·kg-1) and then AMPA (22%; 223-732 μg·kg-1). The maximum GLP concentrations quantified in rainwater exceeded the previously reported levels for the USA and Canada. No associations were observed be...Continue Reading

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Dec 11, 2019·Environmental Science and Pollution Research International·Gabriela R SilveyraDaniel A Medesani
Aug 3, 2019·International Journal of Environmental Research and Public Health·Sarath GunatilakeLaura Orlando
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