Transport of As (III) from Acidic Feed Solution through Supported Liquid Membrane Impregnated with Tri-n-dodecylamine and Recovery as As (V)

Figure 6

Effect of NaOH concentration on transport of As (III). [HCl] in feed solution = 0.67 mol/dm³, [TDDA] in membrane phase = 0.63 mol/dm³, [NaOH] in stripping solution = 0.25 mol/dm³ to 1.50 mol/dm³, [As (III)] = 8.6019 × 10⁻⁴ mol/dm³, [H₂O₂] = 10⁻⁷ mol/L, time = 4.0 h.