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Changes in polycyclic aromatic hydrocarbon availability in River Tyne sediment following bioremediation treatments or activated carbon amendment

Lookup NU author(s): Dr Paola Meynet, Dr Russell Davenport, Dr Martin Jones, Professor David Werner

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Abstract

Bioremediation and activated carbon (AC) amendment were compared as remediation strategies for sediment from the River Tyne containing 16.4 +/- 7.3 mu g/g polycyclic aromatic hydrocarbons (PAHs) and approximately 5% coal particles by total dry sediment weight. Unamended, nutrient amended (biostimulated) and nutrient and Pseudomonas putida amended (bioaugmented) sediment microcosms failed to show a significant decrease in total sediment PAH concentrations over a one month period. Polyethylene passive (PE) samplers were embedded for 21 days in these sediment microcosms in order to measure the available portion of PAHs and accumulated 4.70 +/- 0.25, 12.43 +/- 1.78, and 23.49 +/- 2.73 mu g PAHs/g PE from the unamended, biostimulated, and bioaugmented,microcosms, respectively. Higher PAH uptake by PE samplers in biostimulated and bioaugmented microcosms coincided with slower degradation of spiked phenanthrene in sediment-free filtrate from these microcosms compared to filtrate from the unamended microcosms. Microbial community analysis revealed changes in the bacterial community directly following the addition of nutrients, but the added P. putida community failed to establish itself. Addition of 2% by dry sediment weight activated carbon reduced PAH uptake by PE samplers to 0.28 +/- 0.01 mu g PAHs/g PE, a greater than 90% reduction compared to the unamended microcosms. (C) 2010 Elsevier Ltd. All rights reserved.


Publication metadata

Author(s): Hale SE, Meynet P, Davenport RJ, Jones DM, Werner D

Publication type: Article

Publication status: Published

Journal: Water Research

Year: 2010

Volume: 44

Issue: 15

Pages: 4529-4536

Print publication date: 01/08/2010

ISSN (print): 0043-1354

ISSN (electronic): 1879-2448

Publisher: IWA Publishing

URL: http://dx.doi.org/10.1016/j.watres.2010.06.027

DOI: 10.1016/j.watres.2010.06.027


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