The invention discloses a
fluorine adsorbent and a method for removing and recovering
fluorine from
fluorine-containing water. The adsorbent is mixture comprising
metal element Me
oxide, Me
hydrate and
silicon oxide and Me
hydrate; the [sigma Me] / [Si]
mole ratio of the adsorbent is 0.01-100;
metal element Me is selected from elements capable of forming oxyfluoride with fluorine; the applicable pH(potential of
hydrogen) range of the adsorbent is 0-7. The fluorine removing
recovery method is characterized in that the fluorine-containing water contacts with the adsorbent, fluorine in the water is removed by adsorption, fluorine removing rate reaches 99.3% or more, the load adsorbent obtained by
filtration is desorbed by alkali to obtain a regenerated adsorbent and fluorine-containing solution, the regenerated adsorbent is returned to an adsorption process to be reused,
sodium-containing reagents are added into fluorine-containing solution to crystallize and separate out
sodium fluoride,and
crystallization mother liquor obtained by
filtration can return to a regenerating process of the load adsorbent to be reused. According to the fluorine adsorbent, the fluorine adsorption rate of the adsorbent is high, the adsorbent is applicable to wide pH value ranges, the F (fluorine) in the water can be reduced to 1mg / L or less and is recovered by
sodium fluoride, and waste is changed intowealth. The fluorine adsorbent has the advantages of simple process, simplicity and convenience in operation, cleanness,
environmental protection, good fluorine removing effect and the like, and the fluorine adsorbent is suitable for removing, recovering and industrial application of fluorine in the fluorine-containing water.