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The Relationship between Epilithic Periphyton (Biofilm) Bound Metals and Metals Bound to Sediments in Freshwater Systems

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Abstract

Surficial sediments and epilithic periphyton (biofilm) were sampled from six sites on the River Churnet and five sites on the River Manifold in Staffordshire and analysed for cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn). The sites demonstrated a wide range of sediment trace metal concentrations determined by inductively coupled plasma optical emission spectrometry (ICP-OES) and atomic absorbtion spectroscopy (AAS). Biofilm was removed from the substrate using physical abrasion and 0.005 M ethylenediaminoethanetetra-acetic acid (EDTA) extractant. The European Standards, Measurements and Testing Programmes (BCR) operationally defined geochemical speciation scheme was used to determine the exchangeable, acid soluble fraction of the sediments. Significant positive correlations were determined between the EDTA extractable biofilm and the exchangeable sediment fraction for Cd, Cu and Zn but not for Pb. Natural epilithic periphyton may be a potential metal biomonitor particularly of Cu, Cd and Zn in aquatic systems and provide supporting information in relation to potential sediment toxicity.

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Holding, K., Gill, R. & Carter, J. The Relationship between Epilithic Periphyton (Biofilm) Bound Metals and Metals Bound to Sediments in Freshwater Systems. Environmental Geochemistry and Health 25, 87–93 (2003). https://doi.org/10.1023/A:1021205101133

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  • DOI: https://doi.org/10.1023/A:1021205101133

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