Original scientific paper
Adsorption of reactive dye on activated carbon: kinetic study and influence of initial dye concentration
Adriana Gaščić
; University of Zagreb, Faculty of Textile Technology, Zagreb, Croatia
Ana Sutlović
orcid.org/0000-0002-4629-8434
; University of Zagreb, Faculty of Textile Technology, Zagreb, Croatia
Branka Vojnović
; University of Zagreb, Faculty of Textile Technology, Zagreb, Croatia
Mario Cetina
orcid.org/0000-0001-7524-5828
Abstract
Although many of the dyes used in dyeing process are not toxic, dyed effluents
have harmful and negative aesthetic and biological effect on water systems,
and therefore dyes should be removed from wastewaters. This paper deals
with isothermal adsorption of Reactive Black 5 dye on commercial activated
carbon. Batch adsorption study was carried out in different periods, from 30
minutes to 16 hours, when equilibrium was reached. Results show exponential
lowering of dye concentration after adsorption, from 500 mg dm-3 to
118 mg dm-3 at equilibrium. In order to investigate the mechanism of
adsorption kinetic studies have been performed, and pseudo-second order
kinetic model better describes adsorption process of this system. The aim of
this work was also to compare influence of initial dye concentration on the
adsorption process; percentage of adsorbed dye at equilibrium for initial dye
concen-tration c0 = 300 mg dm-3 is for 18 % bigger than that of
c0 = 500 mg dm-3.
Keywords
isothermal adsorption; wastewaters; activated carbon; reactive dye; adsorption kinetics
Hrčak ID:
305984
URI
Publication date:
14.11.2021.
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