nerc.ac.uk

Persistent organic pollutants in sediment and fish in the River Thames catchment (UK)

Lu, Qiong; Juergens, Monika D.; Johnson, Andrew C.; Graf, Carola; Sweetman, Andy; Crosse, John; Whitehead, Paul. 2017 Persistent organic pollutants in sediment and fish in the River Thames catchment (UK). Science of the Total Environment, 576. 78-84. 10.1016/j.scitotenv.2016.10.067

Before downloading, please read NORA policies.
[img] Text
N515298PP.pdf - Accepted Version
Restricted to NORA staff only until January 2018.

Download (2MB)

Abstract/Summary

Some organic pollutants including polychlorinated biphenyls (PCBs), polybrominated diphenylethers (PBDEs) and hexachlorobenzene (HCB) have been banned from production and use in the UK for > 30 years but due to their toxicity and persistence are still of concern. However, due to their hydrophobicity they are present at very low concentrations and are difficult to measure in water, and so other matrices need to be sampled in order to best assess contamination. This study measured concentrations of ΣICES 7 PCBs (PCB congeners 28, 52, 101, 118, 138, 153 and 180) and Σ6 PBDEs (PBDE congeners 28, 47, 99, 100, 153, 154) and HCB in both bed-sediments and wild roach (a common pelagic fish) in the Thames Basin. The highest sediment concentrations were detected in an urbanised tributary of the Thames, The Cut at Bracknell (HCB: 0.03–0.40 μg/kg dw; ICES 7 PCBs: 4.83–7.42 μg/kg dw; 6 BDEs: 5.82–23.10 μg/kg dw). When concentrations were expressed on a dry weight basis, the fish were much more contaminated than the sediments, but when sediment concentrations were normalised to organic carbon concentration they were comparable to the fish lipid normalised concentrations. Thus, despite the variability in the system, both sediments and wild fish can be considered suitable for representing the level of POPs contamination of the river system given sufficient sample numbers.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.scitotenv.2016.10.067
CEH Sections: Rees (from October 2014)
ISSN: 0048-9697
Additional Keywords: POPs, sediment, fish, River Thames
NORA Subject Terms: Ecology and Environment
Hydrology
Chemistry
Date made live: 02 Dec 2016 10:50 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/515298

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...