The styrene-maleic anhydride copolymer was chemically modified, in the presence of formaldehyde, with 4-amino-2-hydroxybenzoic acid or 4-aminobenzoic acid giving sorbents S 1 and S 2 , respectively. The specific sorption behaviour of S 1 and S 2 towards germanium(IV) was examined and optimized, the preconcentrated germanium(IV) after desorption being spectrophotometrically quantified with bis(2,3,4-trihydroxyphenylazo)benzidine in the presence of hexamethylenetetramine, phenanthroline and 2,2'-bipyridine. The dynamic sorption capacity and detection limits (3σ, n = 17) of germanium were found to be 152.2 and 127.1 mg·g , for S 1 and S 2 , accordingly. The application of S 1 and S 2 was demonstrated for the selective preconcentration/determination of germanium in seawater and water obtained after oil pumping.
Copolymer of maleic anhydride with styrene is modified and two new chelating sorbents are synthesized. These sorbents contains fragments of m-phenilendiamine (S1) and diaminobenzidine (S2). The sorption conditions of cadmium with these sorbents were investigated for the first time (pH=5, 2 Cd C =6•10-2 mol/l, V liquid =20 ml, m sorbent =0.05 g, СЕ=487 mg/g (for S1) and СЕ=509 mg/g (for S2). Sorption was studied in static and dynamic modes. The results of the study showed that the maximum sorption of sorbents S1 and S2 is observed at pH 5. The effect of metal concentration on sorption was also studied. The developed methodology has been applied to isolate cadmium(II) from the water of the river Agstafa and the river Jogaz of the Kazakh region of the Azerbaijan Republic.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.