On the mechanism of sorption of nickel(II) ions by modified carbon sorbents

Autor:	T. I. Vakul’skaya, O. I. Randin, G. A. Petukhova, G. N. Dudareva
Rok vydání:	2015
Předmět:	inorganic chemicals Organic Chemistry Inorganic chemistry Metals and Alloys Solvation Ab initio chemistry.chemical_element Sorption Surfaces Coatings and Films chemistry.chemical_compound Nickel Dimethylglyoxime Solvation shell Adsorption chemistry Chemisorption Materials Chemistry
Zdroj:	Protection of Metals and Physical Chemistry of Surfaces. 51:939-943
ISSN:	2070-206X 2070-2051
DOI:	10.1134/s2070205115060064
Popis:	The results of a study of natural and synthetic carbon sorbents (CS) for extraction of nickel(II) ions from solutions are presented. The modification of sorbents by organic reagents (dimethylglyoxime and acethydrazidine) selectively interacting with nickel ions allowed increasing the sorption capacity to nickel by an average of one order of magnitude. The energy characteristics of possible structures of nickel complexes taking into account the solvation shells were calculated by the techniques of quantum chemistry ab initio. The starting and modified CS samples were studied by EPR spectroscopy before and after the sorption of nickel. Changes in the polyconjugated structure of sorbents in the processes of modification and adsorption were revealed. The mechanisms of sorption by the starting and modified sorbents including chemisorption, electrochemical, and various types of donor–acceptor interaction were proposed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::845ed357a5a7fb0c4defa55c75f013b3 https://doi.org/10.1134/s2070205115060064 Zobrazit plný text záznamu Full text from SpringerLink