ArticleEnvironmental monitoring and assessment2026
Assessment of heavy metals and naturally occurring radioactive materials (NORM) from historical mine wastelands: a case study of Brakpan, South Africa.
Article in Environmental monitoring and assessment, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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Abstract
Mining has contributed to South Africa's development, but its legacy has left more than 6000 abandoned sites, with Brakpan in South Africa among the most affected areas. This study assessed heavy metals and naturally occurring radioactive materials (NORM) in the Brakpan mine wasteland in Gauteng Province, South Africa. Soil and water samples from the area were analysed using inductively coupled plasma mass spectrometry (ICP-MS) for heavy metals and high-purity germanium gamma-ray spectrometry (HPGe) was used for NORM analysis. The results showed elevated concentrations of several contaminants. In soils, chromium (103.98 mg/kg) and arsenic (47.75 mg/kg) were notably enriched, while uranium exhibited the highest mean concentration (7.14 mg/kg), exceeding the South African soil quality guidelines for contaminated land. Water samples showed high concentration of uranium (mean 1.64 mg/L) and nickel (12.78 mg/L) concentrations, exceeding guideline values for agricultural use and aquatic ecosystem protection value of 0.03 mg/L and 0.04 mg/L, respectively. Suggesting potential risks to downstream water users and ecological receptors. Radiological analysis revealed activity concentrations of
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