The role of surface coatings on sediments in sediment:water partitioning of trace elements and radionuclides

Ewais, Tarek A., Grant, Alastair and Abdel Fattah, A. T. (2000) The role of surface coatings on sediments in sediment:water partitioning of trace elements and radionuclides. Journal of Environmental Radioactivity, 49 (1). pp. 55-64. ISSN 1879-1700

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Abstract

Fine sediments usually have a much greater capacity to sorb metals and radionuclides than coarse sediments. In some estuarine sediments studied here the cation binding capacity of the sand fraction was much larger than would be predicted from estimates of specific surface area. This anomaly is shown to be due in part to surface coatings of iron compounds and to clay particles cemented to the sand grains by these coatings. Treatment of the sands with ultrasound and 0.5 M HCl removes these surface coatings and reduces their capacity to sorb Cs by a factor of four, but has a much smaller impact on their ability to sorb Zn and Co. Even after the removal of surface coatings the difference in partition coefficients between sands and clays was much less than expected.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Rosie Cullington
Date Deposited: 20 May 2011 10:50
Last Modified: 12 Jul 2020 23:41
URI: https://ueaeprints.uea.ac.uk/id/eprint/31162
DOI: 10.1016/S0265-931X(99)00096-X

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