Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions

Samantha J. Viljoen; Francesca L. Brailsford; Daniel, V Murphy; Murdoch University; David R. Chadwick; Davey L. Jones

doi:10.1016/j.jhazmat.2022.130256

Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions

Samantha J. Viljoen, Francesca L. Brailsford, Daniel, V Murphy, Murdoch University, David R. Chadwick, Davey L. Jones

School of Environmental & Natural Sciences

Murdoch University

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

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Abstract

Phthalate acid esters (PAEs) are commonly used plastic additives, not chemically bound to the plastic that migrate into surrounding environments, posing a threat to environmental and human health. Dibutyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) are two common PAEs found in agricultural soils, where degradation is attributed to microbial decomposition. Yet the impact of the plastic matrix on PAE degradation rates is poorly understood. Using 14C-labelled DBP and DEHP we show that migration from the plastic matrix into soil represents a key rate limiting step in their bioavailability and subsequent degradation. Incorporating PAEs into plastic film decreased their degradation in soil, DBP (DEHP) from 79% to 21% (9% to

Original language	English
Article number	130256
Journal	Journal of Hazardous Materials
Volume	443
Issue number	part B
Early online date	27 Oct 2022
DOIs	https://doi.org/10.1016/j.jhazmat.2022.130256
Publication status	Published - 5 Feb 2023

Keywords

Chemical additives
14C labelled PAE
Plastic pollution
Biodegradation
Bioremediation

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jhazmat.2022.130256Licence: CC BY-NC-ND

1-s2.0-S0304389422020507-main (1)Final published version, 2.97 MBLicence: CC BY-NC-ND

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title = "Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions",

abstract = "Phthalate acid esters (PAEs) are commonly used plastic additives, not chemically bound to the plastic that migrate into surrounding environments, posing a threat to environmental and human health. Dibutyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) are two common PAEs found in agricultural soils, where degradation is attributed to microbial decomposition. Yet the impact of the plastic matrix on PAE degradation rates is poorly understood. Using 14C-labelled DBP and DEHP we show that migration from the plastic matrix into soil represents a key rate limiting step in their bioavailability and subsequent degradation. Incorporating PAEs into plastic film decreased their degradation in soil, DBP (DEHP) from 79\% to 21\% (9\% to ",

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author = "Viljoen, \{Samantha J.\} and Brailsford, \{Francesca L.\} and Murphy, \{Daniel, V\} and Murdoch University and Chadwick, \{David R.\} and Jones, \{Davey L.\}",

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T1 - Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions

AU - Viljoen, Samantha J.

AU - Brailsford, Francesca L.

AU - Murphy, Daniel, V

AU - University, Murdoch

AU - Chadwick, David R.

AU - Jones, Davey L.

PY - 2023/2/5

Y1 - 2023/2/5

N2 - Phthalate acid esters (PAEs) are commonly used plastic additives, not chemically bound to the plastic that migrate into surrounding environments, posing a threat to environmental and human health. Dibutyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) are two common PAEs found in agricultural soils, where degradation is attributed to microbial decomposition. Yet the impact of the plastic matrix on PAE degradation rates is poorly understood. Using 14C-labelled DBP and DEHP we show that migration from the plastic matrix into soil represents a key rate limiting step in their bioavailability and subsequent degradation. Incorporating PAEs into plastic film decreased their degradation in soil, DBP (DEHP) from 79% to 21% (9% to

AB - Phthalate acid esters (PAEs) are commonly used plastic additives, not chemically bound to the plastic that migrate into surrounding environments, posing a threat to environmental and human health. Dibutyl phthalate (DBP) and di(2-ethylhexyl) phthalate (DEHP) are two common PAEs found in agricultural soils, where degradation is attributed to microbial decomposition. Yet the impact of the plastic matrix on PAE degradation rates is poorly understood. Using 14C-labelled DBP and DEHP we show that migration from the plastic matrix into soil represents a key rate limiting step in their bioavailability and subsequent degradation. Incorporating PAEs into plastic film decreased their degradation in soil, DBP (DEHP) from 79% to 21% (9% to

KW - Chemical additives

KW - 14C labelled PAE

KW - Plastic pollution

KW - Biodegradation

KW - Bioremediation

U2 - 10.1016/j.jhazmat.2022.130256

DO - 10.1016/j.jhazmat.2022.130256

M3 - Article

SN - 0304-3894

VL - 443

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

IS - part B

M1 - 130256

ER -

Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions

Abstract

Keywords

UN SDGs

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