Treatment technologies and degradation pathways of glyphosate: A critical review

Feng, Dan; Soric, Audrey; Boutin, Olivier

doi:10.1016/j.scitotenv.2020.140559

Cited by 105 publications

(63 citation statements)

References 118 publications

(140 reference statements)

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“…This finding may suggest that P. lilacinum degrades glyphosate through the pathway that involves a C-P bond cleavage, causing the release of a phosphate group and sarcosine, where the latter may be further degraded upon releasing glycine and formaldehyde [44]. In our samples, glycine has never been detected probably due to either an incomplete pathway or the uptake of sarcosine and/or released glycine by the biomass, since it can be utilised as nutritional sources [73,74]. Uptake in biomass may also explain the reason why, despite glyphosate degradation occurring mainly during the first week, sarcosine is not detected before the third week.…”

Section: Discussionmentioning

confidence: 69%

“…However, Adelowo and Correa also detected AMPA, the first metabolite reported in another known glyphosate degradation pathway in fungi, in their samples [44][45][46]. The AMPA pathway involves the cleavage of the C-N bond of glyphosate releasing AMPA as first step of degradation, which can either be degraded to methylamine and phosphate or to phosphoformaldehyde and, later, to formaldehyde [10,44,73]. Therefore, considering their results, it is possible to hypothesise that the same strain may operate at the same time through different pathways.…”

Section: Discussionmentioning

confidence: 99%

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Glyphosate-Eating Fungi: Study on Fungal Saprotrophic Strains’ Ability to Tolerate and Utilise Glyphosate as a Nutritional Source and on the Ability of Purpureocillium lilacinum to Degrade It

et al. 2021

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Glyphosate is the most commonly used herbicide worldwide. Its improper use during recent decades has resulted in glyphosate contamination of soils and waters. Fungal bioremediation is an environmentally friendly, cost effective, and feasible solution to glyphosate contamination in soils. In this study, several saprotrophic fungi isolated from agricultural environments were screened for their ability to tolerate and utilise Roundup in different cultural conditions as a nutritional source. Purpureocillium lilacinum was further screened to evaluate the ability to break down and utilise glyphosate as a P source in a liquid medium. The dose–response effect for Roundup, and the difference in toxicity between pure glyphosate and Roundup were also studied. This study reports the ability of several strains to tolerate 1 mM and 10 mM Roundup and to utilise it as nutritional source. P. lilacinum was reported for the first time for its ability to degrade glyphosate to a considerable extent (80%) and to utilise it as a P source, without showing dose-dependent negative effects on growth. Pure glyphosate was found to be more toxic than Roundup for P. lilacinum. Our results showed that pure glyphosate toxicity can be only partially addressed by the pH decrease determined in the culture medium. In conclusion, our study emphasises the noteworthy potential of P. lilacinum in glyphosate degradation.

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Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 99%

Glyphosate-Eating Fungi: Study on Fungal Saprotrophic Strains’ Ability to Tolerate and Utilise Glyphosate as a Nutritional Source and on the Ability of Purpureocillium lilacinum to Degrade It

et al. 2021

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“…Physicochemical processes such as adsorption, membrane filtration, and coagulation have proven to be efficient and economical for removing glyphosate [107,108]. Adsorption is a widely used process for treating and purifying water contaminated with glyphosate due to its simplicity, non-toxicity, low-cost design, and high efficiency.…”

Section: Physicochemical Treatments For Glyphosate Remediationmentioning

confidence: 99%

“…The glyphosate adsorption process occurs through physical and chemical interactions between the functional groups of the glyphosate molecule (-COOH, -NH 2 , and -PO(OH) 2 ) and the surface of the adsorbent [107]. In general, it has been found that under acidic conditions, the adsorption of glyphosate by different adsorbents is more favorable, so it has been proposed that pH is one of the most determining factors affecting the glyphosate adsorption process [108,113]. Likewise, the concentration of the pollutant, the temperature, the adsorbent dose, and the ionic strength are also key factors for the overall efficiency of this process [115].…”

Section: Physicochemical Treatments For Glyphosate Remediationmentioning

confidence: 99%

Glyphosate Pollution Treatment and Microbial Degradation Alternatives, a Review

et al. 2021

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Glyphosate is a broad-spectrum herbicide extensively used worldwide to eliminate weeds in agricultural areas. Since its market introduction in the 70’s, the levels of glyphosate agricultural use have increased, mainly due to the introduction of glyphosate-resistant transgenic crops in the 90’s. Glyphosate presence in the environment causes pollution, and recent findings have proposed that glyphosate exposure causes adverse effects in different organisms, including humans. In 2015, glyphosate was classified as a probable carcinogen chemical, and several other human health effects have been documented since. Environmental pollution and human health threats derived from glyphosate intensive use require the development of alternatives for its elimination and proper treatment. Bioremediation has been proposed as a suitable alternative for the treatment of glyphosate-related pollution, and several microorganisms have great potential for the biodegradation of this herbicide. The present review highlights the environmental and human health impacts related to glyphosate pollution, the proposed alternatives for its elimination through physicochemical and biological approaches, and recent studies related to glyphosate biodegradation by bacteria and fungi are also reviewed. Microbial remediation strategies have great potential for glyphosate elimination, however, additional studies are needed to characterize the mechanisms employed by the microorganisms to counteract the adverse effects generated by the glyphosate exposure.

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“…Esses processos baseiam-se na produção de radicais hidroxilas (HO • ), os quais são altamente oxidantes e não seletivos, sendo capazes de degradar compostos de difícil oxidação (Forti et al, 2020;Rêgo, et al, 2014;Tadayozzi et al, 2021). Uma das maneiras mais eficientes de gerar radicais hidroxilas é por meio de uma mistura de peróxido de hidrogênio e sais ferrosos, conhecida por "Reagente de Fenton" (Haber e Weiss, 1934), onde os radicais são produzidos em reações em cadeia (Feng et al, 2020;Guimarães, 2013;Zhang et al, 2019). Nesse contexto, o objetivo deste trabalho foi aplicar o processo oxidativo denominado eletro-Fenton para tratar um efluente industrial proveniente da fabricação de lentes solares, que contem diferentes corantes do grupo antraquinona em sua composição.…”

Section: Introductionunclassified

Tratamento de efluentes provenientes da fabricação de lentes solares

Forti

Tadayozzi

Silva

et al. 2021

RSD

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Este trabalho é uma parceria com uma empresa de produtos oftálmicos que gera efluentes contendo uma mistura de três corantes dispersos: azul 56, amarelo 54 e vermelho 60, todos da classe das antraquinonas. Os corantes dessa classe são resistentes a degradação devido a sua estrutura aromática, a qual retêm a cor por longos períodos de tempo. O tratamento destes corantes é de extrema importância devido à sua toxicidade, podendo apresentar comportamento cancerígeno e mutagênico. O objetivo deste trabalho foi oxidar os compostos orgânicos poluentes usando processos oxidativos avançados. Para isso, foram realizadas eletrólises a corrente constante usando eletrodos de óxidos como catalisadores heterogêneos juntamente com o reagente de Fenton (Fe2+ + H2O2). A descoloração e oxidação foram monitoradas por espectrometria UV-Visível, cromatografia líquida de alta eficiência e carbono orgânico total. O tratamento aplicado permitiu uma rápida degradação dos grupos cromóforos e houve grande influência da concentração do peróxido de hidrogênio na velocidade dessa degradação. Os resultados foram satisfatórios, uma vez que a coloração foi eliminada e os produtos da oxidação identificados não apresentam toxicidade e podem facilmente tratados por métodos tradicionais.

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Treatment technologies and degradation pathways of glyphosate: A critical review

Cited by 105 publications

References 118 publications

Glyphosate-Eating Fungi: Study on Fungal Saprotrophic Strains’ Ability to Tolerate and Utilise Glyphosate as a Nutritional Source and on the Ability of Purpureocillium lilacinum to Degrade It

Glyphosate-Eating Fungi: Study on Fungal Saprotrophic Strains’ Ability to Tolerate and Utilise Glyphosate as a Nutritional Source and on the Ability of Purpureocillium lilacinum to Degrade It

Glyphosate Pollution Treatment and Microbial Degradation Alternatives, a Review

Tratamento de efluentes provenientes da fabricação de lentes solares

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