S 73 Sorbents based on N-(2-carboxyethyl)chitosan cross-linked by nanosecond electron beams / S. Yu. Sokovnin, M. E. Balezin, I. S. Puzyrev, A. V. Pestov, Yu. G. Yatluk, E. V. Zabolotskaya // Russian Chemical Bulletin. - 2009. - Vol. 58, № 6. - P1172-1179 : il. - Bibliogr. : p. 1179 (17 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ХИТОЗАНЫ -- КАРБОКСИЭТИЛХИТОЗАН -- ХЕЛАТНЫЕ СОРБЕНТЫ Аннотация: Methods for the synthesis of new chelating chitosan derivatives containing 2-carboxyethyl groups were developed. Their macromolecules were cross linked by the irradiation with a nanosecond electron beam, which gave for the first time sorbents with a high sorption capacity for CuII ions. The maximum sorption capacity, which is achieved in the pH range 6.5—7.2. and the Langmuir adsorption constant of Cu2+ ions on the sorbent with the degree of substitution 0.91 are 1.37 mmol g–1 and 152.51 L mol–1, respectively. The structures of the formed complexes in the sorbent phase were characterized by ESR spectroscopy Полный текст |