Izvorni znanstveni članak
Influence of salt on the decolourisation of Everzol Black B dye solution by adsorption process
Petra Mihovilović
; Sveučilište u Zagrebu Tekstilno-tehnološki fakultet, Zagreb, Hrvatska
*
Mario Cetina
; Sveučilište u Zagrebu Tekstilno-tehnološki fakultet, Zagreb, Hrvatska
Branka Vojnović
; Sveučilište u Zagrebu Tekstilno-tehnološki fakultet, Zagreb, Hrvatska
Ana Pešić
; Sveučilište u Zagrebu Tekstilno-tehnološki fakultet, Zagreb, Hrvatska
Antonija Ivezić
; Sveučilište u Zagrebu Tekstilno-tehnološki fakultet, Zagreb, Hrvatska
* Dopisni autor.
Sažetak
The textile industry produces considerable amounts of wastewater, which often contain high content of remained dyes from dyeing processes. Of the many decolourisation methods available, the adsorption has proven to be one of the most efficient and cost-effective. Namely, salts present in the wastewater due to its usage as auxiliaries in the dyeing process can increase the efficiency of the adsorption process. The aim of this paper was to investigate the adsorption efficiency of commercially available powdered activated carbon for the removal of the reactive dye Everzol Black B (c0= 500 mg dm-3) in the presence of sodium chloride at the different concentrations (c = 0.1 and 1.0 mol dm-3). Isothermal batch adsorption studies were carried out at 45 (±1) °C with 0.1 g of activated carbon in the periods of 15 minutes to 16 hours when equilibrium was reached, and the results were compared with the adsorption process in a salt absence. Based on the results obtained, we determined that the adsorption process in a presence of sodium chloride results in increase in the decolourisation efficiency. Regardless of salt conecentration adsorption follows the pseudo-second-order kinetic model. Finally, determined thermodynamic parameters confirmed that the presence of sodium chloride leads to more energetically favourable process compared to the one in salt absence, and that higher sodium chloride concentration leads to the more spontaneous adsorption.
Ključne riječi
textile wastewater; Everzol Black B; isothermal adsorption; activated carbon; ionic strength; adsorption kinetics
Hrčak ID:
347536
URI
Datum izdavanja:
10.11.2025.
Posjeta: 0 *