Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/11134
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bobos, I. | pt |
dc.contributor.author | Rocha, F. | pt |
dc.date.accessioned | 2013-10-14T17:32:06Z | - |
dc.date.issued | 2006 | - |
dc.identifier.issn | 0375-6742 | pt |
dc.identifier.uri | http://hdl.handle.net/10773/11134 | - |
dc.description.abstract | Radiocaesium (137Cs) dispersion and Cs+ fixation were studied in the sediments collected from the lagoon systems of “Ria de Aveiro”. The Cs+ sorption was tested for the fine mica grains and for the < 2 μm clay fractions extracted from silty clays. The Cs+ exchange is found strongly onto mica-rich fractions than smectite-rich fractions. The distribution coefficient increases if the silty material is constituted by rich-mica clay fractions or if the non-clay minerals are removed from the silty-clay material. The samples studied behave as multisite ion exchange, where Cs+ engages in ion-exchange reactions with hydrated cations on planar sites on expansible layer silicates. Higher concentrations of the 137Cs were found associated with mica-rich silty clays. The 137Cs ranges from 3.2 to 3.9 Bq kg− 1 in the < 38 μm fractions and from 2.9 to 3.3 Bq kg− 1 in the < 64 μm fractions. | pt |
dc.language.iso | eng | pt |
dc.publisher | Elsevier | pt |
dc.rights | restrictedAccess | por |
dc.subject | Radiocaesium | pt |
dc.subject | Distribution coefficient | pt |
dc.subject | Silty-clay sediments | pt |
dc.subject | Lagoon systems of “Ria de Aveiro” | pt |
dc.subject | Portugal | pt |
dc.title | Radiocaesium dispersion and fixation in the lagoon systems of "Ria de Aveiro", Portugal | pt |
dc.type | article | pt |
dc.peerreviewed | yes | pt |
ua.distribution | international | pt |
degois.publication.firstPage | 367 | pt |
degois.publication.issue | 1-3 | pt |
degois.publication.lastPage | 372 | pt |
degois.publication.title | Journal of Geochemical Exploration | pt |
degois.publication.volume | 88 | pt |
dc.date.embargo | 10000-01-01 | - |
dc.identifier.doi | 10.1016/j.gexplo.2005.08.077 | pt |
Appears in Collections: | DBio - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Radiocaesium dispersion and fixation in the lagoon.pdf | 320.67 kB | Adobe PDF |
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