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Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus (S1);Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Chemija (N003);Chemistry (N003)
Author(s): Kaušpėdienė, Danutė;Ragauskas, Romas;Pakštas, Vidas;Gefenienė, Audronė
Title: Comparative investigation of plain and silver impregnated activated carbons for the removal of cyanide from basic aqueous solutions in the batch process
Is part of: Chemical engineering communications. Philadelphia : Taylor & Francis, 2017, Vol. 204, iss. 11
Extent: p. 1258-1269
Date: 2017
Keywords: Activated carbons adsorption;Electroplating;Free cyanide;Impregnation;Silver cyanide complex
Abstract: Purolite AC-20 and Norit RB 0.8CC activated carbons impregnated with AgNO3 were used for the removal of CN– and Ag–CN complex from model wastewater. The formed Ag0 centers were approved by scanning electron microscopy micrographs and X-ray powder diffraction data. The degree of Ag0 participating in CN– sorption varied from 100 to 45% on AC-20/Ag and from 100 to 73% on RB 0.8CC/Ag, by varying [CN–]/[Ag] in the initial solution from 2.0 to 19.2. The Freundlich isotherm and Fleming kinetic models were consistent with the experimental data. The KF values for the CN– adsorption on AC-20/Ag and RB 0.8CC/Ag increased by a factor of 1.2 and 1.5, but they lowered for Ag–CN adsorption by a factor of 4.1 and 2.1, respectively, as compared to that of plain activated carbons. The removal of 90% cyanides is appropriate by combining two batches from activated carbon: impregnated, mainly for the removal of CN–, and plain, removing the rest of Ag–CN
Affiliation(s): Valstybinis mokslinių tyrimų institutas Fizinių ir technologijos mokslų centras
Vytauto Didžiojo universitetas
Švietimo akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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