Adsorption of heavy-metal ions on Cibacron Blue F3GA-immobilized microporous polyvinylbutyral-based affinity membranes

摘要: Abstract Microporous polyvinylbutyral membranes were prepared by a solvent-casting technique. An affinity dye, i.e. Cibacron Blue F3GA was then immobilized. These with high water content of 89%, and carrying 3.3 mmol F3GA/m 2 membrane used in the adsorption/stripping some selected heavy-metal ions (e.g. Cu(II), Zn(II), Cd(II) Pb(II) from aqueous media containing different amounts these (0.024–4.60 mmol/1) at pH values (2.0–9.0). Adsorption rates very high, adsorption equilibria reached ca. 15 min. The maximum adsorptions onto F3GA-immobilized their single solutions 7.0 mmol/m for 16.8 22.2 Cd(II), 34.2 Pb(II). Similar behavior observed when competed (in case mixture), order Pb(II)> Cd(II)> Zn(II)> Cu(II). Heavy-metal regeneration achieved using 0.1 M HNO 3 30 It that could be repeatedly adsorbed tripped without significant loss capacity.