ADSORPTION OF GLYPHOSATE IN A FOREST SOIL: A STUDY USING MOSSBAUER AND FT-IR SPECTROSCOPY

作者：Benetoli Luis Otavio de B^*; de Santana Henrique; Carneiro Cristine E A; Zaia Dimas A M; Ferreira Ailton S; Paesano Andrea Jr; Zaia Cassia Thais B V

来源：Quimica Nova, 2010, 33(4): 855-859.

DOI：10.1590/S0100-40422010000400017

• herbicides
• metals
• soil

We studied the adsorption of glyphosate (GPS) onto soil mineral particles, using FT-IR and Mossbauer spectroscopy. From IR measurements for samples collected under native vegetation of a forest reserve, bands at 1632 and 1407 cm(-1) could be attributed to the interaction between the carboxylic group of GPS and structural Al(3+) and Fe(3+) on the surface of mineral particles; bands at 1075 and 1000 cm(-1) were observed only for cultivated soil. Mossbauer spectra for these soils were definitely fitted using a broad central doublet in addition to the magnetic component. This multiple quadrupolar component may be attributed to all non-magnetic Fe(3+) contributions, including that of the GPS/Fe(3+) complex.

• 出版日期2010