Abstract
The concentrations (mg kg −1) of Fe, Mn, Zn, Pb, Cu and Cd have been determined in suspended coastal particulates. Enrichment factors (EF) have been determined with iron as the reference element to identify contaminated particulates. Decreases in EFs between the Irish Sea and west of Scotland are interpreted as being due to a combination of dilution and sedimentation of enriched particulates from the Irish Sea. Particulates from the Firth of Clyde are shown to be enriched in manganese. Trace metal enrichments within the Firth are closely correlated with manganese (but not iron), suggesting that manganese hydroxide coatings are important. The origin of such coatings and the wider implications to coastal geochemistry are discussed.
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