Research Article

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

Figure 1

Variation of available (a) Fāˆ’, (b) K+, and (c) Fe2+ in treated mica according to weathering stage, and leaching rate of (d) Fāˆ’, (e) K+, and (f) Fe2+ from fresh biotite.
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