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Covalent bonding of polyhexamethyleneguanidine amides of maleic and o phthalic acids to the aminated silica surface was performed. The complexing properties of the obtained composite adsorbents with respect to Zn(II), Cu(II), Fe(III), Co(II), Pb(II), Ni(II), Mn(II), Mo(VI), and Cr(VI) ions were studied. The Mo(VI) and Cr(VI) reduction was detected on the modified silica surface bearing polyhexamethyle neguanidine amide with o phthalic acid. The formation of different ligand complexes with transition metal cations adsorbed on the synthesized composite surface was studied.

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