Retention of riverine iron in estuaries

Details Retention of riverine iron in estuaries Retention of riverine iron in estuaries

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.1003m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Issue 6, pp.1003-1009

Physics

4

Scientific paper

Retention of Fe flocs, resulting from the mixing of river water and seawater, was examined in three Maine estuaries. Riverine Fe was found to remain fairly conservative with salinity, implying that the process of floccufation does not necessarily remove Fe from water parcels. Laboratory experiments corroborated the field data by demonstrating that neither gravity nor suspended sediment were very effective in removing flocculated Fe from suspension. However, input of a tannery effluent did appear to result in scavenging of Fe from estuarine waters. Flocculated riverine Fe was found to increase considerably the Fe concentrations of estuarine bottom sediments, with the amount of iron per sediment specific surface area dependent on mean river flow entering an estuary. While no long term retention efficiencies could be calculated for these estuaries, it seems likely that a significant portion of flocculated riverine Fe escapes to shelf waters.

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