Leaching of phthalate acid esters from plastic mulch films and their degradation in response to UV irradiation and contrasting soil conditions
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In: Journal of Hazardous Materials, Vol. 443, No. part B, 130256, 05.02.2023.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
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
VL - 443
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
SN - 0304-3894
IS - part B
M1 - 130256
ER -