Geochemical characterization and assessment of fluoride sources in groundwater of Siloam area, Limpopo Province, South Africa.

Sci Rep · 2021 · PMC8263625 · PMID 34234224

Europe PMC DOI

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a decreasing trendno p-value reported

Fluoride concentrations show a decreasing trend from the surface down to the aquifer.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.