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Enrichment And Heterogeneity Of Trace Elements At The Redox-Interface Of Fe-Rich Intertidal Sediments, Annabelle F. Keene, Scott G. Johnston, Richard T. Bush, Edward D. Burton, Leigh A. Sullivan, Matthew Dundon, Angus E. Mcelnea, C Doug Smith, Col R. Ahern, Bernard Powell
Enrichment And Heterogeneity Of Trace Elements At The Redox-Interface Of Fe-Rich Intertidal Sediments, Annabelle F. Keene, Scott G. Johnston, Richard T. Bush, Edward D. Burton, Leigh A. Sullivan, Matthew Dundon, Angus E. Mcelnea, C Doug Smith, Col R. Ahern, Bernard Powell
Professor Edward D Burton
Redox-interfacial sediments can undergo radical geochemical changes with oscillating tides. In this study, we examine trace element enrichment and availability, at both landscape and pedon-scales, in the surface sediments of a remediating acidic tidalwetland. Fe-rich sediments at the surface-water interface (0–10mmin depth) were collected across an elevation gradient spanning the supratidal to subtidal range. These sediments were analysed for solid phase Fe fractions and trace elements (As, Pb, Cr, Cu, Mn, Ni, Zn, V, B, Co, Mo, Ba and U) via dilute HCl-extractions and total digests. Their concentrations were compared with those of underlying (0.05–0.65 m in depth) former sulfuric …