Sorption properties of poly(styrene-co-divinylbenzene) amine functionalized weak resin

The poly(styrene-co-divinylbenzene) amine functionalized weak re sin was st udied as adsorbent of heavy metal ions from an aqueous solution dy using th e Batch equilibrium procedure. The resin adsorbed Hg(II) 56% (0.56 mEq/g) a t pH 2, and 45% (1.13 mEq/g) of U(VI), 38% (0.36 mEq/g) of Pb(II) at pH 5 f rom an aqueous solution containing 1 g/L of each metal ion. It did not adso rb Cd(II), Zn(II). The equilibrium time was achieved during the first hour. The maximum load capacity for Hg(II) was 0.8 mEq/g (75 mg)/g dry resin. It is possible to recover around 60% of the resin after the treatment with 1- 4 M HClO4 and HNO3 of the loaded Hg(II) resin. (C) 2001 John Wiley & Sons, Inc.