Adsorption properties of nanostructured form of aluminium hydroxide γ-modification

Autor:	V. I. Dudarev, E. G. Filatova, L. A. Begunova
Rok vydání:	2020
Předmět:	chemistry.chemical_compound Materials science Adsorption Chemical engineering chemistry Aluminium hydroxide
Zdroj:	IOP Conference Series: Materials Science and Engineering. 962:042078
ISSN:	1757-899X 1757-8981
DOI:	10.1088/1757-899x/962/4/042078
Popis:	Adsorption properties of aluminium hydroxide γ-modification towards toxic copper(II) and zinc(II) ions were studied. In a neutral medium at pH=7.6, the ion adsorption capacity was 264 mg/g for copper(II) and 338 mg/g for zinc(II). The study of the temperature effect on the absorbability of toxic ions established that the adsorption capacity is characterized by an increase followed by a decrease as the equilibrium value is reached. The absorbability increase in the initial moment is caused by an increase in the formation rate of hydroxo aqua complexes of copper(II) and zinc(II) ions. The differential heat of adsorption was determined. It demonstrated a decrease from 27 to 20 kJ/mol during the process, which is caused by the fact that, as the most active centres of nanostructured form of aluminium hydroxide γ-modification are saturated, heavy metal ions are adsorbed by decreasingly active regions of its surface.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::62a5f0b9e26f43f469942f67db62fe73 https://doi.org/10.1088/1757-899x/962/4/042078 Zobrazit plný text záznamu