Publications by authors named "Emmanuel Klubi"
Article Synopsis
- - This study analyzes levels of gamma-emitting radionuclides and various metals in sediments from the Ankobra, Pra, and Volta estuaries in Ghana, revealing enrichments in the Ankobra and Pra basins due to artisanal gold mining.
- - The concentrations of radionuclides were consistent with those typically found in the Earth's crust, and no definitive conclusions were drawn regarding their enrichment from gold mining activities; however, the study noted a transfer of radium from sediments to water.
- - The different patterns of metal enrichment in the estuaries were explored through various methods, indicating that the observed increases in metals like arsenic and copper are likely linked to iron-rich compounds from sulfide ores transported by rivers and deposited
Theoretical and experimental studies have shown that activity concentrations of fallout radionuclides (such as Cs and excess Pb) decrease with particles size in aqueous suspensions. This paper is aimed at reviewing the theoretical fundamentals for granulometric speciation of radionuclides, and at exploring its practical use in the analytical context of gamma spectrometry for the radiometric dating of recent sediments, with view to: i) improving the detection of Cs (since its use as independent chronostratigraphic mark is challenging in the southern hemisphere because its low fallout rate), ii) supporting refined CIC models and normalization techniques in Pb-based radiogeochronologies. The work uses surface sediments sampled from the Tinto Estuary (SW Spain), affected by mining and phosphate-fertilizer industries, and from the Ankobra Estuary (Ghana), affected by intensive artisanal gold-mining.
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