Recovery of Vanadium (V) Oxyanions by a Magnetic Macroporous Copolymer Nanocomposite Sorbent

An amino-functionalized magnetic macroporous copolymer of glycidyl methacrylate (GM) and ethylene glycol (E) dimethacrylate (m-poly(GME)-deta) was synthesized, fully characterized, used to investigate the adsorption vanadium (V) oxyanions from aqueous solutions (Ci = 0.5 mM) in a batch system at room temperature (298 K). Pseudo-first-order (PFO), pseudo-second-order (PSO), Elovich, intra-particle diffusion (IPD) models were analyze kinetic data. The study showed that sorption is rapid, i.e., half-time approximately one minute. Initially, process primarily involved surface sorbent particles, it best described by PSO model. However, after saturation active sites attained, rate decreases significantly because limitations rate, which then controlled IPD process. favorable pH range 3–6 due strong electrostatic interactions between absorption centers oxyanions. In stated range, deta with two three protonated N atoms are equilibrium as studied quantum chemical modeling. Among V(V) species present diluted media, H2VO4− ions dominates.