Leaching of Fluoride from Biotite Mica in Soil: Implications for Fluoride in Shallow Groundwater | Zendy

Kanchana Kularatne | Zendy; H.M.T.G.A. Pitawala | Zendy

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Leaching of Fluoride from Biotite Mica in Soil: Implications for Fluoride in Shallow Groundwater

Author(s) -

Kanchana Kularatne,

H.M.T.G.A. Pitawala

Publication year - 2012

Publication title -

isrn soil science

Language(s) - English

Resource type - Journals

ISSN - 2090-875X

DOI - 10.5402/2012/739051

Subject(s) - biotite , leaching (pedology) , groundwater , weathering , dissolution , fluoride , geology , chemistry , mica , environmental chemistry , geochemistry , mineralogy , soil science , inorganic chemistry , soil water , quartz , organic chemistry , paleontology , geotechnical engineering

Leaching of F− from biotite was investigated at room temperature by performing a series of short-term leach tests. The leaching of F− from biotite structure strongly depends on its weathering stage. Results of this study suggest that high concentration of F− is leached from highly weathered biotite, compared to fresh biotite. Results of dissolution experiments confirm that the organic acids in soil promote the leaching of F− from biotite compared to inorganic acids. Citric acid which is a week organic acid enhances leaching of F− from biotite structure compared to strong inorganic acid HNO3, independent of the weathering stage of biotite. Strong positive correlation between K

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