The herbicide glyphosate is increasingly used for its low toxicity and high rate of degradation in soils. Glyphosate is known to interact in soils with iron and aluminum oxides and to form insoluble complexes, whereas limited attention has been devoted to the study of chemical interactions of glyphosate with soil organic components. The objective of this investigation was to evaluate the possible occurrence of glyphosate-humic acids complexes. Samples were freeze-dried and analyzed by infrared and fluorescence spectroscopy in the emission, excitation and synchronous-scan excitation modes. Spectroscopic results showed an apparent disaggregation of the humic molecule with increasing glyphosate content, probably due to an increasing extent of hydrogen bonding interactions between the phosphono groups of glyphosate and the humic polymer.

Infrared and fluorescence spectroscopy of Glyphosate-humic acid complexes

CELANO, Giuseppe;
1992-01-01

Abstract

The herbicide glyphosate is increasingly used for its low toxicity and high rate of degradation in soils. Glyphosate is known to interact in soils with iron and aluminum oxides and to form insoluble complexes, whereas limited attention has been devoted to the study of chemical interactions of glyphosate with soil organic components. The objective of this investigation was to evaluate the possible occurrence of glyphosate-humic acids complexes. Samples were freeze-dried and analyzed by infrared and fluorescence spectroscopy in the emission, excitation and synchronous-scan excitation modes. Spectroscopic results showed an apparent disaggregation of the humic molecule with increasing glyphosate content, probably due to an increasing extent of hydrogen bonding interactions between the phosphono groups of glyphosate and the humic polymer.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4679880
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 30
social impact