Pages: 361-367

Authors: Ana A. Čučulović and Dragan S. Veselinović

Abstract

Extraction of ¹³⁷Cs from: Hypnum cupressiforme and Isothecium myurum mosses was investigated using the following solutions: H₂SO₄, HNO₃, and a mixture of H₂SO₄ and HNO₃ at three pH values (4.61, 5.15, and 5.75) and distilled water (pH = 6.50). After five successive desorption processes lasting 24 hours the following amounts of ¹³⁷Cs [%] were extracted from mosses: using acid solutions 19.1-34.7 and 18.4-30.5, and using distilled water 29.1 and 26.9. Sorption of ¹³⁷Cs was performed at no less than two sorption points in moss tissue. In the investigated pH region no significant influence of H₂SO₄ or HNO₃ on ¹³⁷Cs extraction was noted in relation to water extraction, i. e. extraction with acid rain with pH > 4.6.

Key words: H₂SO₄, HNO₃, H₂SO₄-HNO₃ mixture, distilled water, ¹³⁷Cs extraction, moss

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