Preparation and metal binding behavior of poly(4-vinylbenzyl 2-hydroxyethyl) sulfoxide and sulfone

In order to explore the reuse properties of oxidized chelating resin containing sulfur after adsorption, two kinds of novel chelating resins, poly[4-vinylbenzyl-(2-hydroxyethyl)] sulfoxide (PVBSO) and poly[4-vinylbenzyl-(2-hydroxyethyl)] sulfone (PVBSO2), were synthesized using poly[4-vinylbenzyl-(2-hydroxyethyl)] sulfide (PVBS) as material. Their structures were confirmed by FTIR and XPS. The adsorption properties and mechanism for metal ions such as Au3+, Pt4+, Pd2+, Hg2+, CU2+, Ni2+, Fe3(+), Pb2+, Cd2+, and Zn2+ were investigated. Experimental results showed that PVBSO had good adsorption and selective properties for An(3+), Pd2+ and CU2+ when the coexisting ion was pt(4+), Ni2+, Pb2+ or Cd2+. In the aqueous system containing CU2+, and Pb2+ or CU2+ and Cd2+, PVBSO2 only adsorbed CU2+. The selective coefficients of PVBSO and PVBSO2 were alpha(Au/Pt) = 4.8, alpha(Au/Pd) = 11.8, alpha(Pd/Pt) = 10.9, alpha(Cu/Ni) = 2.5, alpha(Cu/Cd) = 41.2, alpha(Cu/Pb) = infinity, alpha(Cu/Ni) = 3.0, alpha(Cu/Cd) = infinity, alpha(Cu/Pb) = infinity, respectively. (c) 2005 Elsevier Ltd. All rights reserved.