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Sediment–Water Distribution and Benthic Boundary Layer Fluxes of Pharmaceuticals and Personal Care Products near Wastewater Discharge into a Tidal River Shoal
https://orcid.org/0000-0002-3727-5994
Pharmaceuticals and personal care products (PPCPs) were measured in porewater, sediment, and surface water at three sites near wastewater treatment plant (WTP) discharge along a 2 km downstream transect in a tributary shoal embayment (Alexandria, VA) of the tidal Potomac River. A benthic diffusion layer model evaluated water-only, dissolved organic carbon (DOC)-associated, and bioturbation mass transport pathways. Fluxes of 17 PPCPs nearest the WTP were all in the direction of surface water to sediment porewater (negative) with magnitudes of −0.0016 to −7.4 ng m–2 s–1. At the next downstream site, fluxes of seven PPCPs were bidirectional (negative and positive) and ranged from −4.8 × 10–4 to 0.0051 ng m–2 s–1. The furthest site downstream yielded fluxes of six PPCPs that were predominantly sediment to water (positive), ranging in magnitude from −0.0020 to 7.0 × 10–4 ng m–2 s–1. The bioturbation and water-only mass transport coefficients contributed most to fluxes for PPCPs. The DOC-associated mass transport term was negligible. The fluxes indicated sediments will continue serve as a source of PPCPs 2 km downstream from WTP discharge.
Sorption was appreciable for low-log D OW PPCPs (<3) having multiple hydrogen donor and acceptor groups, and benthic fluxes showed geosolids acted as both sources and sinks at varying distances from wastewater discharge.
Sediment–Water Distribution and Benthic Boundary Layer Fluxes of Pharmaceuticals and Personal Care Products near Wastewater Discharge into a Tidal River Shoal
https://orcid.org/0000-0002-3727-5994
Pharmaceuticals and personal care products (PPCPs) were measured in porewater, sediment, and surface water at three sites near wastewater treatment plant (WTP) discharge along a 2 km downstream transect in a tributary shoal embayment (Alexandria, VA) of the tidal Potomac River. A benthic diffusion layer model evaluated water-only, dissolved organic carbon (DOC)-associated, and bioturbation mass transport pathways. Fluxes of 17 PPCPs nearest the WTP were all in the direction of surface water to sediment porewater (negative) with magnitudes of −0.0016 to −7.4 ng m–2 s–1. At the next downstream site, fluxes of seven PPCPs were bidirectional (negative and positive) and ranged from −4.8 × 10–4 to 0.0051 ng m–2 s–1. The furthest site downstream yielded fluxes of six PPCPs that were predominantly sediment to water (positive), ranging in magnitude from −0.0020 to 7.0 × 10–4 ng m–2 s–1. The bioturbation and water-only mass transport coefficients contributed most to fluxes for PPCPs. The DOC-associated mass transport term was negligible. The fluxes indicated sediments will continue serve as a source of PPCPs 2 km downstream from WTP discharge.
Sorption was appreciable for low-log D OW PPCPs (<3) having multiple hydrogen donor and acceptor groups, and benthic fluxes showed geosolids acted as both sources and sinks at varying distances from wastewater discharge.
Sediment–Water Distribution and Benthic Boundary Layer Fluxes of Pharmaceuticals and Personal Care Products near Wastewater Discharge into a Tidal River Shoal
https://orcid.org/0000-0002-3727-5994
Pharmaceuticals and personal care products (PPCPs) were measured in porewater, sediment, and surface water at three sites near wastewater treatment plant (WTP) discharge along a 2 km downstream transect in a tributary shoal embayment (Alexandria, VA) of the tidal Potomac River. A benthic diffusion layer model evaluated water-only, dissolved organic carbon (DOC)-associated, and bioturbation mass transport pathways. Fluxes of 17 PPCPs nearest the WTP were all in the direction of surface water to sediment porewater (negative) with magnitudes of −0.0016 to −7.4 ng m–2 s–1. At the next downstream site, fluxes of seven PPCPs were bidirectional (negative and positive) and ranged from −4.8 × 10–4 to 0.0051 ng m–2 s–1. The furthest site downstream yielded fluxes of six PPCPs that were predominantly sediment to water (positive), ranging in magnitude from −0.0020 to 7.0 × 10–4 ng m–2 s–1. The bioturbation and water-only mass transport coefficients contributed most to fluxes for PPCPs. The DOC-associated mass transport term was negligible. The fluxes indicated sediments will continue serve as a source of PPCPs 2 km downstream from WTP discharge.
Sorption was appreciable for low-log D OW PPCPs (<3) having multiple hydrogen donor and acceptor groups, and benthic fluxes showed geosolids acted as both sources and sinks at varying distances from wastewater discharge.
Sediment–Water Distribution and Benthic Boundary Layer Fluxes of Pharmaceuticals and Personal Care Products near Wastewater Discharge into a Tidal River Shoal
Foster, Gregory D. (author) / Leahigh, Arion (author)
ACS ES&T Water ; 1 ; 1447-1455
2021-06-11
Article (Journal)
Electronic Resource
English
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