Evidence for the migration of steroidal estrogens through river bed sediments

Labadie, P., Cundy, A.B., Stone, K.J.L., Andrews, M., Valbonesi, S. and Hill, E.M. (2007) Evidence for the migration of steroidal estrogens through river bed sediments Environmental Science and Technology, 41 (12). pp. 4299-4304. ISSN 1520-5851

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Abstract

Estrogenic substances discharged from wastewater treatment plants have been detected in surface sediments of receiving waters, but little is known of their vertical migration through buried sediments and their potential to contaminate subsurface waters. The vertical profiles of estrogenic chemicals were investigated in sediment cores at an alluvial freshwater site (Ditchling) and a clay-rich estuarine site (Lewes), both of which are downstream of wastewater discharges into the River Ouse (Sussex, U.K.). Estrone (E1) was the predominate estrogen detected in surface and buried sediments at both sites and was detected in undisturbed clay sediments >120 years old. Profiles of E1 at Ditchling were characterised by a prominent subsurface peak of E1 at the alluvium/clay interface (-15cm) at a concentration (28.8+-6.0 ng/g of dry wt) that was 9-fold higher than in the surface sediment. In contrast, a steady downcore decline in E1 concentrations was observed in the clay-rich Lewes core. This work provides the first in situ evidence of estrogen migration through river bed sediments and reveals that movement of estrogens through unconsolidated sediment can result in penetration to the underlying substrata and therefore the potential for groundwater contamination.

Item Type:Journal article
Subjects:F000 Physical Sciences > F600 Geology
DOI (a stable link to the resource):10.1012/es063062j
Faculties:Faculty of Science and Engineering > School of Environment and Technology > Ground water and structural engineering
Faculty of Science and Engineering > School of Environment and Technology
ID Code:2451
Deposited By:editor environment
Deposited On:17 Oct 2007
Last Modified:30 Apr 2012 11:46

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