Aluminium sulfate synergistic electrokinetic separation of soluble components from phosphorus slag and simultaneous stabilization of fluoride

Solidification and Stabilization of Fluorine and Phosphorus in Phosphate Mine Tailings and the Mechanism of F and P Fixation During Soilization

“…This can be explained by the occurrence of Al 3 + reacting with F À to generate AlF 3 , leading to a decline in the concentration of free-phase F in the phosphorus tailing, and ultimately achieving a stabilising effect (Figure 1a). [21] The addition of ferrous sulfate promoted the stabilization of effective phosphorus in phosphate mine tailings. Up to 77.66 % of the effective phosphorus in the phosphate mine tailings was solidified by the addition of 1 % ferrous sulfate, which may be attributed to the formation of a more stable complex between the effective phosphorus in the phosphate mine tailings and ferrous ions (Figure 1a).…”