From aq. 500-mg, F/L HF, H2SiF6, AIF3 or NaF solution, F was adsorbed on (a) granulated basic C (WD-ekstra), (b) powdered basic C (CWZ-14), (c) neutral C (CWO-22). (d) mineral carbonaceous sorbent (SMW), (e) coal-dust agglomerate, carbonized at 700degreesC and activated with steam at 850degreesC (AW) and (f) gamma-Al2O3 used at (a, b, c) 0-100, (d, e) 0-200, and (f) 2-10 g/L solution at room temp., pH < 7. F was best adsorbed from HF and H2SiF6 on &GE;20 g a, b,c and &GE;50 g d/L solution to attain equilibrium at &SIM;150 mg F/L solution at pH &SIM; 5. The lowest concentrations of F in the solutions studied were attained with c. At 100, 500 mg H3PO4/L and room temp. (30 min), H3PO4 did not interfere with F adsorption on a, b, c. H2SO4 at 0.3 --> 2.1 g/L, pH = 1, desorbed F totally from sorbent a. H2SO4, NH4OH, and (NH4)(2)SO4 favored desorption of F with H2O. The d, e were less effective than the a, b, c. In AIF(3) and H2SiF6, 10 g gamma-Al2O3/L reduced F to < 1 and to < 10 mg/L in 4 and 21 h, resp. The adsorbent should match the F solution, SO42- and OH- must be absent, and pH < 7. (25 refs.)