期刊
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
卷 256, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jenvrad.2022.107063
关键词
Lead; Dissolution kinetics; Occupational exposure; Fly ash; Boiler scale
Samples from coal-fired power stations in the Czech Republic were collected to assess their dissolution parameters, particularly uranium and lead content. The dissolution rates were analyzed using different models and it was found that uranium and lead were mainly deposited in fine particles.
Samples of fly ash, slag and boiler scale containing elevated amounts of uranium or lead (210Pb) from several coal-fired power stations in the Czech Republic were collected for an assessment of their dissolution parameters - the dissolution rates and their respective fractions in vitro. The dissolution data were fitted either by a biexpo-nential model or by a triexponential model. The uranium 234U and 238U in the fly ash sample are classified as M -type. Similarly, type M could be attributed for most of the materials containing 210Pb. A complementary mea-surement of the activity concentrations of 210Pb in relation to the grain size confirmed that the radionuclide is deposited mainly in fine particles (<25 mu m).
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