Adsorption of glyphosate on clays and soils from Paraná State: effect of pH and competitive adsorption of phosphate

Cruz, Lútecia Hiera da; Santana, Henrique de; Zaia, Cássia Thaïs Bussamra Vieira; Zaia, Dimas Augusto Morozin

doi:10.1590/s1516-89132007000300004

Cited by 36 publications

(27 citation statements)

References 15 publications

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“…However, it is worth pointing out that in spite of the absence of a sharp resolution, an excellent match between the experimental and theoretical curves was achieved when two doublets were used tentatively to fit the very central part of the spectra of GPS-and PO 4 3--containing samples. One of the components had IS, QS, and G constrained to be equal to those found for the respective complex itself (i.e., either PO Figure 4S d) are around 1% of the total spectrum.…”

Section: Resultsmentioning

confidence: 92%

“…These subspectral areas could be understood merely as rough approximations since the uncertainties are as large as the fitted values, which demonstrates that the complex concentrations in the processed soils are too low to be unambiguously detected by Mössbauer spectroscopy. Indeed, according to Glass, 3 Morillo et al, 5 Prata et al, 8 Wang et al, 12,16 da Cruz et al 4 and Gimsing et al, 13 the amount of GPS adsorbed for several soils studied by these authors ranged from 0.02 to 60 mmol of GPS/ g of soil.…”

Section: Resultsmentioning

confidence: 93%

“…[4][5][6][7][11][12][13]16,32,42 They found that the GPS phosphonate group interacts with metals, and in some cases, amine and/or carboxylic groups also interact with metals. Thus, forest reserve soil samples should also show an FT-IR band due to the interaction of metals (Fe…”

Section: Resultsmentioning

confidence: 99%

“…To determine the presence of either GPS/Fe 3+ or PO 4 3-/Fe 3+ in the soil samples, the samples were also measured at 88 K. Figure 4S, supplementary material, shows some selected results obtained at this temperature. Both complexes also show doublets ( Figure 4S a and b), even though with broadened lines.…”

Section: Resultsmentioning

confidence: 99%

“…Some of them can be attributed to: 3017 cm . [29][30][31] The adsorption of GPS onto soils of Paraná State was studied by da Cruz et al 4 and de Santana et al. 32 The FT-IR spectrum of GPS adsorbed onto the soil of a Londrina area farm ( ) in soils.…”

Section: Cyclic Voltammogramsmentioning

confidence: 99%

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Adsorption of glyphosate in a forest soil: a study using Mössbauer and FT-IR spectroscopy

Benetoli¹,

Carneiro²,

Zaia³

et al. 2010

Quím. Nova

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Recebido em 28/5/09; aceito em 25/11/09; publicado na web em 23/3/10We studied the adsorption of glyphosate (GPS) onto soil mineral particles, using FT-IR and Mössbauer 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. Mössbauer 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.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Cyclic Voltammogramsmentioning

confidence: 99%

See 3 more Smart Citations

Adsorption of glyphosate in a forest soil: a study using Mössbauer and FT-IR spectroscopy

Benetoli¹,

Carneiro²,

Zaia³

et al. 2010

Quím. Nova

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Highly Efficient and Low‐Cost Clay‐Based Adsorbent for Glyphosate Removal from Contaminated Water

et al. 2022

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Glyphosate removal from contaminated water by natural clay, natural zeolite, commercial kaolin, bentonite, and sepiolite was compared. Natural clay showed high removal efficiency next to purified kaolin. The adsorption data for natural clay better fitted the Langmuir isotherm model and pseudo-second-order kinetic model. The adsorbent dose was found to be the most important process parameter while the pH did not exhibit any significant effect. An optimization study allowed achieving the highest removal efficiency and sorption capacity. The correlation coefficient R 2 of the regression model indicated that the observed results fitted well with the model prediction.

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Glyphosate adsorption on synthetic allophanes and halloysite: Effects of pH and mineral properties

Remlinger,

Lenhardt,

Rechberger

et al. 2023

J. Plant Nutr. Soil Sci.

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BackgroundGlyphosate (GLP) is a widely used herbicide with possible adverse effects on human health and the environment. In soils, GLP strongly adsorbs on clay‐sized minerals, depending on pH, the amount of organic carbon, as well as the contents and properties of Al and Fe oxyhydroxides and clay minerals. Many clay‐sized minerals have already been investigated regarding GLP adsorption behavior, but information on minerals commonly found in volcanic soils is still lacking.AimThe aim of this study was to investigate for the first time the pH‐dependent adsorption of GLP on allophane and halloysite, typical minerals found in volcanic soils.MethodsGLP adsorption was studied in batch experiments at three pH values (5, 6, and 7). Synthetic allophanes with two different initial Al:Si ratios (1.4 and 1.8) and a halloysite were used as adsorbents.ResultsThe adsorption capacity (AC) increased with rising Al:Si ratio and decreasing pH. The AC of allophane was significantly higher than that of halloysite. GLP adsorption on allophane was larger than that reported for other clay minerals and Al and Fe oxyhydroxides, especially at low pH. The AC of halloysite was higher than reported for most other clay minerals.ConclusionDifferent mineral formation pathways in volcanic soils, notably the formation of halloysite versus allophanes, strongly affect the soils’ retention capacity for GLP. The high AC of allophanes may induce the low mobility of GLP in allophane‐containing soils. Long‐term use of GLP may accumulate the herbicide in these soils with potential effects on biodiversity and ecosystem services.

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Adsorption of glyphosate on clays and soils from Paraná State: effect of pH and competitive adsorption of phosphate

Cited by 36 publications

References 15 publications

Adsorption of glyphosate in a forest soil: a study using Mössbauer and FT-IR spectroscopy

Adsorption of glyphosate in a forest soil: a study using Mössbauer and FT-IR spectroscopy

Highly Efficient and Low‐Cost Clay‐Based Adsorbent for Glyphosate Removal from Contaminated Water

Glyphosate adsorption on synthetic allophanes and halloysite: Effects of pH and mineral properties

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