137Cs desorption from lichen using acid solutions |
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| Authors: | A A ?u?ulovi? D Veselinovi? and S S Miljani? |
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| Institution: | (1) INEP—Institute for the Application of Nuclear Energy, Banatska 31b, Zemun, Serbia;(2) Faculty of Physical Chemistry, University of Belgrade, P.O. Box 137, Belgrade, Serbia |
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| Abstract: | Desoprtion of 137Cs from samples of Cetraria islandica lichen using HCl (A) and HNO3 (B) acid solutions with pH values from 2.00 to 3.75 was investigated. After five consecutive desorptions lasting 24 h it was
shown that between 52.2% (solution B pH 3.28) and 72.2% (solution A pH 2.00) of 137Cs was desorbed from the lichen and the initial desorptions were the most successful. Lichen desorbed with the stated solutions
did not undergo structural changes. The amount of absorbed water from solutions A and B, used for desorption from lichen, in relation to the starting volume (expressed in %) showed that solution concentration
did not take place. Lichen act as neutralizing agents because the pH of the lichen thallus is higher than the pH value of
the solution used
The article is published in the original. |
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