Sediment-water distribution of contaminants of emerging concern in a mixed use watershed

David J. Fairbairn; M. Ekrem Karpuzcu; William A. Arnold; Brian L. Barber; Elizabeth F. Kaufenberg; William C. Koskinen; Paige J. Novak; Pamela J. Rice; Deborah L. Swackhamer

doi:10.1016/j.scitotenv.2014.10.046

Sediment-water distribution of contaminants of emerging concern in a mixed use watershed

David J. Fairbairn^*, M. Ekrem Karpuzcu, William A. Arnold, Brian L. Barber, Elizabeth F. Kaufenberg, William C. Koskinen, Paige J. Novak, Pamela J. Rice, Deborah L. Swackhamer

^*Corresponding author for this work

University of Minnesota Twin Cities

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

80 Citations (Scopus)

Abstract

This study evaluated the occurrence and distribution of 15 contaminants of emerging concern (CECs) in stream water and sediments in the Zumbro River watershed in Minnesota and compared these with sub-watershed land uses. Sixty pairs of sediment and water samples were collected across all seasons from four stream sites for over two years and analyzed for selected personal care products, pesticides, human and veterinary medications, and phytoestrogens. Spatial and temporal analyses indicate that pharmaceuticals and personal care products (urban/residential CECs) are significantly elevated in water and/or sediment at sites with greater population density (>100people/km²) and percentage of developed land use (>8% of subwatershed area) than those with less population density and land area under development. Significant spatial variations of agricultural pesticides in water and sediment were detectable, even though all sites had a high percentage of agricultural land use. Seasonality in CEC concentration was observed in water but not in sediment, although sediment concentrations of three CECs did vary between years. Average measured non-equilibrium distribution coefficients exceeded equilibrium hydrophobic partitioning-based predictions for 5 of the 7 detected CECs by at least an order of magnitude. Agreement of measured and predicted distribution coefficients improved with increasing hydrophobicity and in-stream persistence. The more polar and degradable CECs showed greater variability in measured distributions across different sampling events. Our results confirm that CECs are present in urban and agricultural stream sediments, including those CECs that would typically be thought of as non-sorptive based on their log K_ow values. These results and the observed patterns of sediment and water distributions augment existing information to improve prediction of CEC fate and transport, leading to more accurate assessments of exposure and risk to surface water ecosystems.

Original language	English
Pages (from-to)	896-904
Number of pages	9
Journal	Science of the Total Environment
Volume	505
DOIs	https://doi.org/10.1016/j.scitotenv.2014.10.046
Publication status	Published - 1 Feb 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V.

Keywords

Agriculture
CEC
PPCP
Sediment
Surface water
Urban

UN SDGs

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

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10.1016/j.scitotenv.2014.10.046

Cite this

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title = "Sediment-water distribution of contaminants of emerging concern in a mixed use watershed",

abstract = "This study evaluated the occurrence and distribution of 15 contaminants of emerging concern (CECs) in stream water and sediments in the Zumbro River watershed in Minnesota and compared these with sub-watershed land uses. Sixty pairs of sediment and water samples were collected across all seasons from four stream sites for over two years and analyzed for selected personal care products, pesticides, human and veterinary medications, and phytoestrogens. Spatial and temporal analyses indicate that pharmaceuticals and personal care products (urban/residential CECs) are significantly elevated in water and/or sediment at sites with greater population density (>100people/km2) and percentage of developed land use (>8% of subwatershed area) than those with less population density and land area under development. Significant spatial variations of agricultural pesticides in water and sediment were detectable, even though all sites had a high percentage of agricultural land use. Seasonality in CEC concentration was observed in water but not in sediment, although sediment concentrations of three CECs did vary between years. Average measured non-equilibrium distribution coefficients exceeded equilibrium hydrophobic partitioning-based predictions for 5 of the 7 detected CECs by at least an order of magnitude. Agreement of measured and predicted distribution coefficients improved with increasing hydrophobicity and in-stream persistence. The more polar and degradable CECs showed greater variability in measured distributions across different sampling events. Our results confirm that CECs are present in urban and agricultural stream sediments, including those CECs that would typically be thought of as non-sorptive based on their log Kow values. These results and the observed patterns of sediment and water distributions augment existing information to improve prediction of CEC fate and transport, leading to more accurate assessments of exposure and risk to surface water ecosystems.",

keywords = "Agriculture, CEC, PPCP, Sediment, Surface water, Urban",

author = "Fairbairn, {David J.} and Karpuzcu, {M. Ekrem} and Arnold, {William A.} and Barber, {Brian L.} and Kaufenberg, {Elizabeth F.} and Koskinen, {William C.} and Novak, {Paige J.} and Rice, {Pamela J.} and Swackhamer, {Deborah L.}",

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doi = "10.1016/j.scitotenv.2014.10.046",

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T1 - Sediment-water distribution of contaminants of emerging concern in a mixed use watershed

AU - Fairbairn, David J.

AU - Karpuzcu, M. Ekrem

AU - Arnold, William A.

AU - Barber, Brian L.

AU - Kaufenberg, Elizabeth F.

AU - Koskinen, William C.

AU - Novak, Paige J.

AU - Rice, Pamela J.

AU - Swackhamer, Deborah L.

PY - 2015/2/1

Y1 - 2015/2/1

N2 - This study evaluated the occurrence and distribution of 15 contaminants of emerging concern (CECs) in stream water and sediments in the Zumbro River watershed in Minnesota and compared these with sub-watershed land uses. Sixty pairs of sediment and water samples were collected across all seasons from four stream sites for over two years and analyzed for selected personal care products, pesticides, human and veterinary medications, and phytoestrogens. Spatial and temporal analyses indicate that pharmaceuticals and personal care products (urban/residential CECs) are significantly elevated in water and/or sediment at sites with greater population density (>100people/km2) and percentage of developed land use (>8% of subwatershed area) than those with less population density and land area under development. Significant spatial variations of agricultural pesticides in water and sediment were detectable, even though all sites had a high percentage of agricultural land use. Seasonality in CEC concentration was observed in water but not in sediment, although sediment concentrations of three CECs did vary between years. Average measured non-equilibrium distribution coefficients exceeded equilibrium hydrophobic partitioning-based predictions for 5 of the 7 detected CECs by at least an order of magnitude. Agreement of measured and predicted distribution coefficients improved with increasing hydrophobicity and in-stream persistence. The more polar and degradable CECs showed greater variability in measured distributions across different sampling events. Our results confirm that CECs are present in urban and agricultural stream sediments, including those CECs that would typically be thought of as non-sorptive based on their log Kow values. These results and the observed patterns of sediment and water distributions augment existing information to improve prediction of CEC fate and transport, leading to more accurate assessments of exposure and risk to surface water ecosystems.

AB - This study evaluated the occurrence and distribution of 15 contaminants of emerging concern (CECs) in stream water and sediments in the Zumbro River watershed in Minnesota and compared these with sub-watershed land uses. Sixty pairs of sediment and water samples were collected across all seasons from four stream sites for over two years and analyzed for selected personal care products, pesticides, human and veterinary medications, and phytoestrogens. Spatial and temporal analyses indicate that pharmaceuticals and personal care products (urban/residential CECs) are significantly elevated in water and/or sediment at sites with greater population density (>100people/km2) and percentage of developed land use (>8% of subwatershed area) than those with less population density and land area under development. Significant spatial variations of agricultural pesticides in water and sediment were detectable, even though all sites had a high percentage of agricultural land use. Seasonality in CEC concentration was observed in water but not in sediment, although sediment concentrations of three CECs did vary between years. Average measured non-equilibrium distribution coefficients exceeded equilibrium hydrophobic partitioning-based predictions for 5 of the 7 detected CECs by at least an order of magnitude. Agreement of measured and predicted distribution coefficients improved with increasing hydrophobicity and in-stream persistence. The more polar and degradable CECs showed greater variability in measured distributions across different sampling events. Our results confirm that CECs are present in urban and agricultural stream sediments, including those CECs that would typically be thought of as non-sorptive based on their log Kow values. These results and the observed patterns of sediment and water distributions augment existing information to improve prediction of CEC fate and transport, leading to more accurate assessments of exposure and risk to surface water ecosystems.

KW - Agriculture

KW - CEC

KW - PPCP

KW - Sediment

KW - Surface water

KW - Urban

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M3 - Article

C2 - 25461092

AN - SCOPUS:84911059532

SN - 0048-9697

VL - 505

SP - 896

EP - 904

JO - Science of the Total Environment

JF - Science of the Total Environment

ER -

Sediment-water distribution of contaminants of emerging concern in a mixed use watershed

Abstract

Bibliographical note

Keywords

UN SDGs

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