In Situ Immobilization on the Silica Gel Surface and Adsorption Capacity of Poly[N-(4-carboxyphenyl)methacrylamide] on Toxic Metal Ions

Table 1 The dependence of the degree of adsorption of metal ions on silica gel with immobilized poly[N-(4-carboxyphenyl)methacrylamide] (terms experiment: sorbent mass—0.1 g, volume solutions—25–100 ml, m ⁰ _M—00 mg)

pH and chemical composition of the environment	Degree of adsorption, %
pH and chemical composition of the environment	Cu(II)	Cd(II)	Ni(II)	Mn(II)	Pb(II)	Fe(III)
1.0 (0.1 M HCl)	21.28	6.58	63.86	6.58	59.43	5.88
1.7 (oxalate buffer)	16.83	11.05	40.05	11.05	99.99	6.08
4.0 (phthalate buffer)	15.82	1.05	65.55	1.05	55.81	33.15
5.5 (distilled water)	51.52	6.58	99.99	6.58	57.55	51.46
8.1 (sodium bicarbonate solution)	–	95.60	97.46	95.60	60.24	–
8.4 (ammonium acetate buffer)	70.20	21.32	–	21.32	–	54.07

Precipitation by hydrolysis of the salts of the corresponding metals was observed