Effect of chelation on the uptake and loss of yttrium-91 by porphyra

Porphyra umbilicalis accumulates the fission product yttrium-91 in six hours to a concentration factor of 288 ± 126. This accumulated yttrium may be easily removed to a large extent by washing with sea water to which EDTA has been added. This proves that yttrium is only present in the outer layers o...

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Bibliographic Details
Published in:Netherlands journal of sea research 1969, Vol.4 (3), p.310-316
Main Author: Vosjan, J.H.
Format: Article
Language:English
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Summary:Porphyra umbilicalis accumulates the fission product yttrium-91 in six hours to a concentration factor of 288 ± 126. This accumulated yttrium may be easily removed to a large extent by washing with sea water to which EDTA has been added. This proves that yttrium is only present in the outer layers of the thallus, where it has accumulated by adsorption or (and) ion exchange. When non-active yttrium is added the concentration factor decreases in concentrations over 0.008 mg Y/1, because of precipitation. From sea water containing 10 −5 M EDTA Porphyra hardly extracts any yttrium at all, because the yttrium is chelated.
ISSN:0077-7579
DOI:10.1016/0077-7579(69)90002-7