Spectroscopic characterization of Greek dolomitic marble surface interacted with uranium and thorium in aqueous solutions
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| Title: | Spectroscopic characterization of Greek dolomitic marble surface interacted with uranium and thorium in aqueous solutions |
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| Authors: | Godelitsas, A.1 agodel@geol.uoa.gr, Kokkoris, M.2, Chatzitheodoridis, E.3, Misaelides, P.4 |
| Source: | Nuclear Instruments & Methods in Physics Research Section B. May2008, Vol. 266 Issue 10, p2363-2366. 4p. |
| Subjects: | Spectrum analysis, Marble, Uranium, Thorium |
| Abstract: | Abstract: The surface of a typical Greek (Thassian) dolomitic marble was studied after interaction with U- and Th-containing aqueous solutions (1000mg/L, free-drift experiments for 1week at atmospheric ), using 12C-RBS and Laser μ-Raman spectroscopy. Powder-XRD and SEM-EDS were also applied to investigate the phases deposited on the surface of the interacted samples. The obtained results indicated a considerable removal of U from the aqueous medium mainly due to massive surface precipitation of amorphous UO2-hydroxide phases forming a relatively thick (μm-sized) coating on the carbonate substrate. The interaction of Th with dolomitic marble surface is also intense leading to a formation of an amorphous Th-hydroxide layer of similar thickness but of significantly lower elemental atomic proportion. [Copyright &y& Elsevier] |
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| Database: | Engineering Source |
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