Abstract
Arsenic is a metalloid, which occurs in nature in various forms, but in natural waters mainly in the form of pentavalent oxyanion of arsenate As(V) and trivalent arsenite As(III), which dominates under anaerobic conditions. Arsenic water pollution is a serious problem due to its pronounced negative impact on human health. This paper describes the kinetic and equilibrium studies of the sorption mechanism of oxyanion As(V) in monocomponent aqueous solutions on a silanized magnetic amino-functionalized copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate m-Si-PGME-deta. It has been shown that the sorption of As(V) on m-Si-PGME-deta is a rapid process, initially controlled by ion diffusion rate through solution. After achieving the saturation of the sorbent surface, the sorption rate decreases, because the sorption rate determines the process of intraparticle pore diffusion. The maximum sorption capacity is 5.61 μmolˑg-1.
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