Glyphosate dispersion, degradation, and aquifer contamination in vineyards and wheat fields in the Po Valley, Italy

Daniele la Cecilia; Fiona H.M. Tang; Nicholas V. Coleman; Chris Conoley; R. Willem Vervoort; Federico Maggi

doi:10.1016/j.watres.2018.09.008

Glyphosate dispersion, degradation, and aquifer contamination in vineyards and wheat fields in the Po Valley, Italy

Daniele la Cecilia, Fiona H.M. Tang, Nicholas V. Coleman, Chris Conoley, R. Willem Vervoort, Federico Maggi

Research output: Contribution to journal › Article › Research › peer-review

27 Citations (Scopus)

Abstract

Biodegradation of glyphosate (GLP) and its metabolite aminomethylphosphonic acid (AMPA) was numerically assessed for a vineyard and a wheat field in the Po Valley, Italy. Calculation of the Hazard Quotient suggested that GLP and AMPA can pose a risk of aquifer contamination in the top 1.5 m depth within 50 years of GLP use. Numerical results relative to soil GLP and AMPA concentrations, and GLP age, half life, and turnover time show that GLP was equivalently removed through hydrolysis and oxidation, but the latter produced AMPA. Biodegradation processes in the root zone removed more than 90% of applied GLP and more than 23% of the produced AMPA between two consecutive applications. Doubling organic carbon availability enhanced GLP and AMPA biodegradation, especially GLP hydrolysis to sarcosine. This work highlights that GLP and AMPA removal is controlled by soil water dynamics that depend on ecohydrological boundary conditions, and by carbon sources availability to biodegraders.

Original language	English
Pages (from-to)	37-54
Number of pages	18
Journal	Water Research
Volume	146
DOIs	https://doi.org/10.1016/j.watres.2018.09.008
Publication status	Published - 1 Dec 2018
Externally published	Yes

Keywords

AMPA
Biodegradation
Contaminant ecohydrology
Glyphosate
Michaelis-menten-monod
Pesticide

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10.1016/j.watres.2018.09.008

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title = "Glyphosate dispersion, degradation, and aquifer contamination in vineyards and wheat fields in the Po Valley, Italy",

abstract = "Biodegradation of glyphosate (GLP) and its metabolite aminomethylphosphonic acid (AMPA) was numerically assessed for a vineyard and a wheat field in the Po Valley, Italy. Calculation of the Hazard Quotient suggested that GLP and AMPA can pose a risk of aquifer contamination in the top 1.5 m depth within 50 years of GLP use. Numerical results relative to soil GLP and AMPA concentrations, and GLP age, half life, and turnover time show that GLP was equivalently removed through hydrolysis and oxidation, but the latter produced AMPA. Biodegradation processes in the root zone removed more than 90% of applied GLP and more than 23% of the produced AMPA between two consecutive applications. Doubling organic carbon availability enhanced GLP and AMPA biodegradation, especially GLP hydrolysis to sarcosine. This work highlights that GLP and AMPA removal is controlled by soil water dynamics that depend on ecohydrological boundary conditions, and by carbon sources availability to biodegraders.",

keywords = "AMPA, Biodegradation, Contaminant ecohydrology, Glyphosate, Michaelis-menten-monod, Pesticide",

author = "{la Cecilia}, Daniele and Tang, {Fiona H.M.} and Coleman, {Nicholas V.} and Chris Conoley and Vervoort, {R. Willem} and Federico Maggi",

note = "Funding Information: DLC, FHMT, NC, CC, RWV, and FM were supported by the Sydney Research Excellence Initiative ( SREI2020 ) of The University of Sydney. FM was also supported by the Mid Career Research Award (MCR) of The University of Sydney and by the Sydney Research Accelerator Fellowship (SOAR) by The University of Sydney . The authors acknowledge the University of Sydney HPC service ( http://sydney.edu.au/research_support/ ). The BRTSim solver package can be downloaded at https://www.dropbox.com/sh/wrfspx9f1dvuspr/AAD5iA9PsteX3ygAJxQDxAy9a?dl=0 . Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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T1 - Glyphosate dispersion, degradation, and aquifer contamination in vineyards and wheat fields in the Po Valley, Italy

AU - la Cecilia, Daniele

AU - Tang, Fiona H.M.

AU - Coleman, Nicholas V.

AU - Conoley, Chris

AU - Vervoort, R. Willem

AU - Maggi, Federico

N1 - Funding Information: DLC, FHMT, NC, CC, RWV, and FM were supported by the Sydney Research Excellence Initiative ( SREI2020 ) of The University of Sydney. FM was also supported by the Mid Career Research Award (MCR) of The University of Sydney and by the Sydney Research Accelerator Fellowship (SOAR) by The University of Sydney . The authors acknowledge the University of Sydney HPC service ( http://sydney.edu.au/research_support/ ). The BRTSim solver package can be downloaded at https://www.dropbox.com/sh/wrfspx9f1dvuspr/AAD5iA9PsteX3ygAJxQDxAy9a?dl=0 . Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Biodegradation of glyphosate (GLP) and its metabolite aminomethylphosphonic acid (AMPA) was numerically assessed for a vineyard and a wheat field in the Po Valley, Italy. Calculation of the Hazard Quotient suggested that GLP and AMPA can pose a risk of aquifer contamination in the top 1.5 m depth within 50 years of GLP use. Numerical results relative to soil GLP and AMPA concentrations, and GLP age, half life, and turnover time show that GLP was equivalently removed through hydrolysis and oxidation, but the latter produced AMPA. Biodegradation processes in the root zone removed more than 90% of applied GLP and more than 23% of the produced AMPA between two consecutive applications. Doubling organic carbon availability enhanced GLP and AMPA biodegradation, especially GLP hydrolysis to sarcosine. This work highlights that GLP and AMPA removal is controlled by soil water dynamics that depend on ecohydrological boundary conditions, and by carbon sources availability to biodegraders.

AB - Biodegradation of glyphosate (GLP) and its metabolite aminomethylphosphonic acid (AMPA) was numerically assessed for a vineyard and a wheat field in the Po Valley, Italy. Calculation of the Hazard Quotient suggested that GLP and AMPA can pose a risk of aquifer contamination in the top 1.5 m depth within 50 years of GLP use. Numerical results relative to soil GLP and AMPA concentrations, and GLP age, half life, and turnover time show that GLP was equivalently removed through hydrolysis and oxidation, but the latter produced AMPA. Biodegradation processes in the root zone removed more than 90% of applied GLP and more than 23% of the produced AMPA between two consecutive applications. Doubling organic carbon availability enhanced GLP and AMPA biodegradation, especially GLP hydrolysis to sarcosine. This work highlights that GLP and AMPA removal is controlled by soil water dynamics that depend on ecohydrological boundary conditions, and by carbon sources availability to biodegraders.

KW - AMPA

KW - Biodegradation

KW - Contaminant ecohydrology

KW - Glyphosate

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JO - Water Research

JF - Water Research

ER -

Glyphosate dispersion, degradation, and aquifer contamination in vineyards and wheat fields in the Po Valley, Italy

Abstract

Keywords

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