Chemical Equilibria of Fluorine in Soils

Fluoride sorption and mineral stability in an Alberta soil interacting with phosphogypsum leachate

“…Fluorite is the most probable mineral affecting F activities in soil-PGL systems. Other researchers predict that fluorite is stable in slightly acid and near-neutral soils (Elrashidi and Lindsay 1986a). The same researchers found that at a pH below 4.5, aluminum fluonde is likely to precipitate.…”

Electrokinetic remediation of fluorine-contaminated soil: Conditioning of anolyte

“…However, anionic pollutants such as arsenic and fluoride could be desorbed or dissolved in alkaline conditions from soil mineral more than in acidic or a neutral condition [9]. In electrokinetic removal of anionic pollutants, alkaline conditioning of soil could enhance the removal of fluorine from soil [17][18][19][20].…”

Immobilization Mechanism of Fluorine in Aqueous Solution from Road Material Containing Synthetic Hot Metal Pretreatment Slag by Shaking Test

“…Though there were several stable phases 8,9) which contained fluorine, the stable phase in this calculation is fluorite regardless of Fe, Al and Si ion as shown in Fig. 3, indicating that the immobilization of fluorine was dominated by the Ca ion.…”