Enhanced Glyphosate Removal by Montmorillonite in the Presence of Fe(III)

Ren, Zhong; Dong, Yuanhua

doi:10.1021/ie502773j

Cited by 28 publications

(16 citation statements)

References 43 publications

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“…In clay minerals saturated with higher-charge cations was also observed higher glyphosate adsorption. Since the phosphonate group of glyphosate interacts with metals (Fe, Al, Cu), thus an increase of the content of these metals in clay increases the glyphosate adsorption (Mcconnell and Hossner, 1985;Motekaitis and Martell, 1985;Morillo et al, 1997Morillo et al, , 2000Ren et al, 2014). Surface area is also an important parameter for the adsorption of glyphosate (Mcconnell and Hossner, 1985;Glass, 1987;da Cruz et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Interaction between glyphosate and montmorillonite in the presence of artificial seawater

Pereira

Costa

Ivashita

et al. 2020

Heliyon

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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. M€ ossbauer data showed that the interaction of the phosphonate group of glyphosate with Fe 2þ of montmorillonite prevents its oxidation to Fe 3þ . 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 2þ interacts with glyphosate of the phosphonate group, thus causing an increase in its adsorption onto montmorillonite. However, glyphosate dissolved in 0.50 mol L À1 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 2þ 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.

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Section: Introductionmentioning

confidence: 99%

Interaction between glyphosate and montmorillonite in the presence of artificial seawater

Pereira

Costa

Ivashita

et al. 2020

Heliyon

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“…These remediation technologies can be classified into physical, biological, and chemical processes 19 . Physical treatment processes, including adsorption 20,21 and filtration, 22,23 produce concentrated waste streams that require post-treatment processing in order to be converted to nontoxic products. Although bioremediation technologies can destroy the target contaminants, an obstacle to their applicability is long residence times.…”

Section: Introductionmentioning

confidence: 99%

“…24 Chemical remediation processes are under development to remove GP from wastewater, [25][26][27] however with chemical remediation there is a need for further treatment of degradation products. 19,20 Thermal treatment methods including incineration and pyrolysis are well-established destruction strategies for solid waste management. The main advantages of thermochemical treatment processes are waste volume reduction with potentially complete destruction of toxic compound.…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition Kinetics of Glyphosate (GP) and its Metabolite Aminomethylphosphonic Acid (AMPA)

Narimani¹,

Silva²

2019

Preprint

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Glyphosate (GP) is a widely used herbicide worldwide, yet accumulation of GP and its main byproduct, aminomethylphosphonic acid (AMPA), in soil and water has raised concerns about its potential effects to human health. Thermal treatment processes are one option for decontaminating material containing GP and AMPA, yet the thermal decomposition chemistry of these compounds remains poorly understood. Here, we have revealed the thermal decomposition mechanism of GP and AMPA by applying computational chemistry and reaction rate theory methods. <br>

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“…Several conventional methods such as adsorption (Hu et al, 2011;Ren et al, 2014), membrane filtration (Speth, 1993), biological and chemical treatments (Jardim et al, 1997), have been used to treat glyphosate containing wastewater. The effectiveness of the above methods is varying.…”

Section: Introductionmentioning

confidence: 99%

An activated carbon fiber cathode for the degradation of glyphosate in aqueous solutions by the Electro-Fenton mode: Optimal operational conditions and the deposition of iron on cathode on electrode reusability

et al. 2016

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a b s t r a c tAn activated carbon fiber (ACF) cathode was fabricated and used to treat glyphosate containing wastewater by the Electro-Fenton (EF) process. The results showed that glyphosate was rapidly and efficiently degraded and the BOD 5 /COD ratio was increased to >0.3 implying the feasibility of subsequent treatment of the treated wastewater by biological methods. The results of ion chromatography and HPLC measurements indicated that glyphosate was completely decomposed. Effective OH generation and rapid recycling/recovery of the Fe 2þ ions at the cathode were responsible primarily for the high performance of the ACF-EF process. Factors such as inlet oxygen gas flow rate, Fe 2þ dosage, initial glyphosate concentration, applied current intensity, and solution pH that may affect the efficiency of the ACF-EF process were further studied and the optimum operation condition was established. Results of SEM/EDX, BET and XPS analysis showed the deposition of highly dispersed fine Fe 2 O 3 particles on the ACF surface during the EF reaction. The possibility of using the Fe 2 O 3 -ACF as iron source in the EF process was assessed. Results showed that the Fe 2 O 3 -ACF electrode was effective in degrading glyphosate in the EF process. The deposition of Fe 2 O 3 particles on the ACF electrode had no adverse effect on the reusability of the ACF cathode.

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Enhanced Glyphosate Removal by Montmorillonite in the Presence of Fe(III)

Cited by 28 publications

References 43 publications

Interaction between glyphosate and montmorillonite in the presence of artificial seawater

Interaction between glyphosate and montmorillonite in the presence of artificial seawater

Thermal Decomposition Kinetics of Glyphosate (GP) and its Metabolite Aminomethylphosphonic Acid (AMPA)

An activated carbon fiber cathode for the degradation of glyphosate in aqueous solutions by the Electro-Fenton mode: Optimal operational conditions and the deposition of iron on cathode on electrode reusability

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