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Interaction between glyphosate and montmorillonite in the presence of artificial seawater
Glyphosate (N- (phosphonomethyl) glycine) is one of the most widely used herbicides in the world. In the literature, there are several studies describing the interaction between glyphosate and clay minerals. However, there is a lack of data of this interaction in marine environments. In this researc...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062928/ https://www.ncbi.nlm.nih.gov/pubmed/32181399 http://dx.doi.org/10.1016/j.heliyon.2020.e03532 |
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author | Pereira, Rodrigo C. da Costa, Antonio C.S. Ivashita, Flávio F. Paesano, Andrea Zaia, Dimas A.M. |
author_facet | Pereira, Rodrigo C. da Costa, Antonio C.S. Ivashita, Flávio F. Paesano, Andrea Zaia, Dimas A.M. |
author_sort | Pereira, Rodrigo C. |
collection | PubMed |
description | Glyphosate (N- (phosphonomethyl) glycine) is one of the most widely used herbicides in the world. In the literature, there are several studies describing the interaction between glyphosate and clay minerals. However, there is a lack of data of this interaction in marine environments. In this research, we examined the adsorption of glyphosate onto montmorillonite in the presence of artificial seawater. Mössbauer data showed that the interaction of the phosphonate group of glyphosate with Fe(2+) of montmorillonite prevents its oxidation to Fe(3+). X-ray diffractograms showed that glyphosate adsorption takes place only onto the montmorillonite surface and not in its interlayers. Infrared spectroscopy data demonstrate that the interaction between glyphosate and montmorillonite could be through the amino group. FT-IR spectra of aqueous solutions of salts of seawater showed that Ca(2+) interacts with glyphosate of the phosphonate group, thus causing an increase in its adsorption onto montmorillonite. However, glyphosate dissolved in 0.50 mol L(−1) NaCl and 0.034 mol L-1MgCl2 solutions showed the lowest adsorption onto montmorillonite. In addition, the adsorption of glyphosate onto montmorillonite decreased when the NaCl concentration increased. The results fitted the Sips isotherm model, probably because the Ca(2+) interacts with glyphosate, making the adsorption process more homogeneous. Thus, n values for Freundlich and Sips isotherm models decreased with an increase in ionic strength. Glyphosate and ions of artificial seawater increased the pH(pzc) of montmorillonite. |
format | Online Article Text |
id | pubmed-7062928 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-70629282020-03-16 Interaction between glyphosate and montmorillonite in the presence of artificial seawater Pereira, Rodrigo C. da Costa, Antonio C.S. Ivashita, Flávio F. Paesano, Andrea Zaia, Dimas A.M. Heliyon Article Glyphosate (N- (phosphonomethyl) glycine) is one of the most widely used herbicides in the world. In the literature, there are several studies describing the interaction between glyphosate and clay minerals. However, there is a lack of data of this interaction in marine environments. In this research, we examined the adsorption of glyphosate onto montmorillonite in the presence of artificial seawater. Mössbauer data showed that the interaction of the phosphonate group of glyphosate with Fe(2+) of montmorillonite prevents its oxidation to Fe(3+). X-ray diffractograms showed that glyphosate adsorption takes place only onto the montmorillonite surface and not in its interlayers. Infrared spectroscopy data demonstrate that the interaction between glyphosate and montmorillonite could be through the amino group. FT-IR spectra of aqueous solutions of salts of seawater showed that Ca(2+) interacts with glyphosate of the phosphonate group, thus causing an increase in its adsorption onto montmorillonite. However, glyphosate dissolved in 0.50 mol L(−1) NaCl and 0.034 mol L-1MgCl2 solutions showed the lowest adsorption onto montmorillonite. In addition, the adsorption of glyphosate onto montmorillonite decreased when the NaCl concentration increased. The results fitted the Sips isotherm model, probably because the Ca(2+) interacts with glyphosate, making the adsorption process more homogeneous. Thus, n values for Freundlich and Sips isotherm models decreased with an increase in ionic strength. Glyphosate and ions of artificial seawater increased the pH(pzc) of montmorillonite. Elsevier 2020-03-06 /pmc/articles/PMC7062928/ /pubmed/32181399 http://dx.doi.org/10.1016/j.heliyon.2020.e03532 Text en © 2020 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Pereira, Rodrigo C. da Costa, Antonio C.S. Ivashita, Flávio F. Paesano, Andrea Zaia, Dimas A.M. Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title | Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title_full | Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title_fullStr | Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title_full_unstemmed | Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title_short | Interaction between glyphosate and montmorillonite in the presence of artificial seawater |
title_sort | interaction between glyphosate and montmorillonite in the presence of artificial seawater |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7062928/ https://www.ncbi.nlm.nih.gov/pubmed/32181399 http://dx.doi.org/10.1016/j.heliyon.2020.e03532 |
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