Discharge of landfill leachate to streambed sediments impacts the mineralization potential of phenoxy acid herbicides depending on the initial abundance of tfdA gene classes

Meric Batioglu Pazarbasi, Nemanja Milosevic, Flavio Malaguerra, Philip John Binning, Hans-Jørgen Albrechtsen, Poul Løgstrup Bjerg, Jens Aamand

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

To understand the role of abundance of tfdA gene classes belonging to β- and γ-proteobacteria on phenoxy acid herbicide degradation, streambed sediments were sampled around three seepage meters (SMs) installed in a landfill-impacted groundwater–surface water interface. Highest herbicide mass discharge to SM3, and lower herbicide mass discharges to SM1 and SM2 were determined due to groundwater discharge rates and herbicide concentrations. SM1-sediment with the lowest abundance of tfdA gene classes had the slowest mineralization, whereas SM2- and SM3-sediments with more abundant tfdA genes had faster mineralization. The observed difference in mineralization rates between discharge zones was simulated by a Monod-based kinetic model, which confirmed the role of abundance of tfdA gene classes. This study suggests presence of specific degraders adapted to slow growth rate and high yield strategy due to long-term herbicide exposure; and thus groundwater–surface water interface could act as a natural biological filter and protect stream water quality.
Original languageEnglish
JournalEnvironmental Pollution
Volume176
Pages (from-to)275-283
ISSN0269-7491
DOIs
Publication statusPublished - 2013

Cite this

@article{749d25af9a244311ac5f60d558b65afd,
title = "Discharge of landfill leachate to streambed sediments impacts the mineralization potential of phenoxy acid herbicides depending on the initial abundance of tfdA gene classes",
abstract = "To understand the role of abundance of tfdA gene classes belonging to β- and γ-proteobacteria on phenoxy acid herbicide degradation, streambed sediments were sampled around three seepage meters (SMs) installed in a landfill-impacted groundwater–surface water interface. Highest herbicide mass discharge to SM3, and lower herbicide mass discharges to SM1 and SM2 were determined due to groundwater discharge rates and herbicide concentrations. SM1-sediment with the lowest abundance of tfdA gene classes had the slowest mineralization, whereas SM2- and SM3-sediments with more abundant tfdA genes had faster mineralization. The observed difference in mineralization rates between discharge zones was simulated by a Monod-based kinetic model, which confirmed the role of abundance of tfdA gene classes. This study suggests presence of specific degraders adapted to slow growth rate and high yield strategy due to long-term herbicide exposure; and thus groundwater–surface water interface could act as a natural biological filter and protect stream water quality.",
author = "Pazarbasi, {Meric Batioglu} and Nemanja Milosevic and Flavio Malaguerra and Binning, {Philip John} and Hans-J{\o}rgen Albrechtsen and Bjerg, {Poul L{\o}gstrup} and Jens Aamand",
year = "2013",
doi = "10.1016/j.envpol.2013.01.050",
language = "English",
volume = "176",
pages = "275--283",
journal = "Environmental Pollution",
issn = "0269-7491",
publisher = "Pergamon Press",

}

Discharge of landfill leachate to streambed sediments impacts the mineralization potential of phenoxy acid herbicides depending on the initial abundance of tfdA gene classes. / Pazarbasi, Meric Batioglu; Milosevic, Nemanja; Malaguerra, Flavio; Binning, Philip John; Albrechtsen, Hans-Jørgen; Bjerg, Poul Løgstrup; Aamand, Jens.

In: Environmental Pollution, Vol. 176, 2013, p. 275-283.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Discharge of landfill leachate to streambed sediments impacts the mineralization potential of phenoxy acid herbicides depending on the initial abundance of tfdA gene classes

AU - Pazarbasi, Meric Batioglu

AU - Milosevic, Nemanja

AU - Malaguerra, Flavio

AU - Binning, Philip John

AU - Albrechtsen, Hans-Jørgen

AU - Bjerg, Poul Løgstrup

AU - Aamand, Jens

PY - 2013

Y1 - 2013

N2 - To understand the role of abundance of tfdA gene classes belonging to β- and γ-proteobacteria on phenoxy acid herbicide degradation, streambed sediments were sampled around three seepage meters (SMs) installed in a landfill-impacted groundwater–surface water interface. Highest herbicide mass discharge to SM3, and lower herbicide mass discharges to SM1 and SM2 were determined due to groundwater discharge rates and herbicide concentrations. SM1-sediment with the lowest abundance of tfdA gene classes had the slowest mineralization, whereas SM2- and SM3-sediments with more abundant tfdA genes had faster mineralization. The observed difference in mineralization rates between discharge zones was simulated by a Monod-based kinetic model, which confirmed the role of abundance of tfdA gene classes. This study suggests presence of specific degraders adapted to slow growth rate and high yield strategy due to long-term herbicide exposure; and thus groundwater–surface water interface could act as a natural biological filter and protect stream water quality.

AB - To understand the role of abundance of tfdA gene classes belonging to β- and γ-proteobacteria on phenoxy acid herbicide degradation, streambed sediments were sampled around three seepage meters (SMs) installed in a landfill-impacted groundwater–surface water interface. Highest herbicide mass discharge to SM3, and lower herbicide mass discharges to SM1 and SM2 were determined due to groundwater discharge rates and herbicide concentrations. SM1-sediment with the lowest abundance of tfdA gene classes had the slowest mineralization, whereas SM2- and SM3-sediments with more abundant tfdA genes had faster mineralization. The observed difference in mineralization rates between discharge zones was simulated by a Monod-based kinetic model, which confirmed the role of abundance of tfdA gene classes. This study suggests presence of specific degraders adapted to slow growth rate and high yield strategy due to long-term herbicide exposure; and thus groundwater–surface water interface could act as a natural biological filter and protect stream water quality.

U2 - 10.1016/j.envpol.2013.01.050

DO - 10.1016/j.envpol.2013.01.050

M3 - Journal article

VL - 176

SP - 275

EP - 283

JO - Environmental Pollution

JF - Environmental Pollution

SN - 0269-7491

ER -