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    Rights statement: This is the author’s version of a work that was accepted for publication in Soil Biology and Biochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Biology and Biochemistry, 143, 2020 DOI: 10.1016/j.soilbio.2020.107722

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The effect of organic acids on the behaviour and biodegradation of 14C-phenanthrene in contaminated soil

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The effect of organic acids on the behaviour and biodegradation of 14C-phenanthrene in contaminated soil. / Vázquez-Cuevas, G.M.; Lag-Brotons, A.J.; Ortega-Calvo, J.J.; Stevens, C.J.; Semple, K.T.

In: Soil Biology and Biochemistry, Vol. 143, 107722, 30.04.2020.

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@article{5563a48508574a8eb713ca80be4591f9,
title = "The effect of organic acids on the behaviour and biodegradation of 14C-phenanthrene in contaminated soil",
abstract = "The interaction between root exudates and soil microbes has been hypothesised as the primary mechanism for the biodegradation of organic pollutants in the rhizosphere. However, the mechanisms governing this loss process are not completely understood. This study aimed to investigate the effect of two important compounds within root exudates (citric and malic acid) on 14C-phenanthrene desorption and bioaccessibility in soil. Overall results showed that the presence of both citric and malic acid (>100 mmol l−1) enhanced the desorption of 14C-phenanthrene; this appeared to be concentration dependant. Increases in extractability were not reflected in a higher bioaccessibility. Despite enhancing the desorption of 14C-phenanthrene in soil, there is no direct evidence indicating that citric or malic acid have the ability to promote the biodegradation of 14C-phenanthrene from soil. Results from this study provide a novel understanding of the role that substrates, typically found within the rhizosphere due to root exudation, play in the bioaccessibility and biodegradation of hydrocarbons in contaminated soil.",
author = "G.M. V{\'a}zquez-Cuevas and A.J. Lag-Brotons and J.J. Ortega-Calvo and C.J. Stevens and K.T. Semple",
note = "This is the author{\textquoteright}s version of a work that was accepted for publication in Soil Biology and Biochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Biology and Biochemistry, 143, 2020 DOI: 10.1016/j.soilbio.2020.107722",
year = "2020",
month = apr,
day = "30",
doi = "10.1016/j.soilbio.2020.107722",
language = "English",
volume = "143",
journal = "Soil Biology and Biochemistry",
issn = "0038-0717",
publisher = "Elsevier Ltd",

}

RIS

TY - JOUR

T1 - The effect of organic acids on the behaviour and biodegradation of 14C-phenanthrene in contaminated soil

AU - Vázquez-Cuevas, G.M.

AU - Lag-Brotons, A.J.

AU - Ortega-Calvo, J.J.

AU - Stevens, C.J.

AU - Semple, K.T.

N1 - This is the author’s version of a work that was accepted for publication in Soil Biology and Biochemistry. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Soil Biology and Biochemistry, 143, 2020 DOI: 10.1016/j.soilbio.2020.107722

PY - 2020/4/30

Y1 - 2020/4/30

N2 - The interaction between root exudates and soil microbes has been hypothesised as the primary mechanism for the biodegradation of organic pollutants in the rhizosphere. However, the mechanisms governing this loss process are not completely understood. This study aimed to investigate the effect of two important compounds within root exudates (citric and malic acid) on 14C-phenanthrene desorption and bioaccessibility in soil. Overall results showed that the presence of both citric and malic acid (>100 mmol l−1) enhanced the desorption of 14C-phenanthrene; this appeared to be concentration dependant. Increases in extractability were not reflected in a higher bioaccessibility. Despite enhancing the desorption of 14C-phenanthrene in soil, there is no direct evidence indicating that citric or malic acid have the ability to promote the biodegradation of 14C-phenanthrene from soil. Results from this study provide a novel understanding of the role that substrates, typically found within the rhizosphere due to root exudation, play in the bioaccessibility and biodegradation of hydrocarbons in contaminated soil.

AB - The interaction between root exudates and soil microbes has been hypothesised as the primary mechanism for the biodegradation of organic pollutants in the rhizosphere. However, the mechanisms governing this loss process are not completely understood. This study aimed to investigate the effect of two important compounds within root exudates (citric and malic acid) on 14C-phenanthrene desorption and bioaccessibility in soil. Overall results showed that the presence of both citric and malic acid (>100 mmol l−1) enhanced the desorption of 14C-phenanthrene; this appeared to be concentration dependant. Increases in extractability were not reflected in a higher bioaccessibility. Despite enhancing the desorption of 14C-phenanthrene in soil, there is no direct evidence indicating that citric or malic acid have the ability to promote the biodegradation of 14C-phenanthrene from soil. Results from this study provide a novel understanding of the role that substrates, typically found within the rhizosphere due to root exudation, play in the bioaccessibility and biodegradation of hydrocarbons in contaminated soil.

U2 - 10.1016/j.soilbio.2020.107722

DO - 10.1016/j.soilbio.2020.107722

M3 - Journal article

VL - 143

JO - Soil Biology and Biochemistry

JF - Soil Biology and Biochemistry

SN - 0038-0717

M1 - 107722

ER -