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Int. J. Environ. Res. Public Health 2017, 14(7), 722; doi:10.3390/ijerph14070722

Metal Water-Sediment Interactions and Impacts on an Urban Ecosystem

Department of Natural Sciences, Faculty of Science and Technology, Middlesex University, The Burroughs, Hendon, London NW4 4BT, UK
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Academic Editor: Susanne Charlesworth
Received: 26 May 2017 / Revised: 29 June 2017 / Accepted: 30 June 2017 / Published: 5 July 2017
(This article belongs to the Special Issue Heavy Metals: Environmental and Human Health)
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Abstract

The EU Water Framework Directive (WFD) requirement that all surface water bodies achieve good ecological status is still a goal for many regulatory authorities in England and Wales. This paper describes field and laboratory studies designed to identify metal contaminant loadings and their distributions within water bodies located in the Lower Lee catchment (London, UK). Water and sediment samples have been collected from increasingly urbanised sites on the River Lee and its main tributaries over a two-year period with samples analysed for total concentrations of cadmium, copper, lead, mercury, nickel, tin, and zinc. Complimentary batch tests indicate a positive relationship between aqueous metal concentrations and the batch test-derived sediment metal release data, particularly during wet weather events. Field data indicate a dynamic relationship between water and sediment concentrations with both being capable of exceeding relevant environmental quality standards/sediment quality guidelines at all sites. Mean sediment metal concentrations across all sites were found to be highest for Cu (141.1 ± 111.0 µg g−1), Pb (175.7 ± 83.0 µg g−1), and Zn (499.9 ± 264.7 µg g−1) with Zn demonstrating elevated mean water concentrations (17.2 ± 13.8 µg L−1) followed by Ni (15.6 ± 11.4 µg L−1) and Cu (11.1 ± 17.8 µg L−1). View Full-Text
Keywords: diffuse and point source pollution; urban receiving waters; urban sediment quality diffuse and point source pollution; urban receiving waters; urban sediment quality
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Lundy, L.; Alves, L.; Revitt, M.; Wildeboer, D. Metal Water-Sediment Interactions and Impacts on an Urban Ecosystem. Int. J. Environ. Res. Public Health 2017, 14, 722.

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