We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Removal of Direct Orange 26 azo dye from water using natural carbonaceous materials.
- Authors
Kuśmierek, Krzysztof; Dąbek, Lidia; Świątkowski, Andrzej
- Abstract
The aim of the study was to assess the possibility of using natural carbonaceous materials such as peat, lignite, and hard coal as low-cost sorbents for the removal of Direct Orange 26 azo dye from an aqueous solution. The adsorption kinetics and the influence of experimental conditions were investigated. The following materials were used in the research: azo dye Direct Orange 26, Spill-Sorb "Fison" peat (Alberta, Canada), lignite (Bełchatów, Poland), and hard coal ("Zofiówka" mine, Poland). The morphology and porous structure of the absorbents were tested. Dye sorption was carried out under static conditions, with different doses of sorbents, pH of the solution, and ionic strength. It was observed that the adsorption of Direct Orange 26 dye on all three adsorbents was strongly dependent on the pH of the solution, while the ionic strength of the solution did not affect the adsorption efficiency. The adsorption kinetics were consistent with the pseudo-second-order reaction model. The stage which determines the rate of adsorption is the diffusion of the dye in the near-surface layer. The process of equilibrium adsorption of Direct Orange 26 dye on all tested adsorbents is best described by the Langmuir isotherm. The maximum adsorption capacity for peat, brown coal and hard coal was 17.7, 15.1 and 13.8 mg/g, respectively. The results indicate that peat, lignite, and hard coal can be considered as alternative adsorbents for removing azo dyes from aqueous solutions.
- Subjects
POLAND; AZO dyes; ANTHRACITE coal; ADSORPTION kinetics; WATER use; LANGMUIR isotherms; COLOR removal in water purification; LIGNITE
- Publication
Archives of Environmental Protection, 2023, Vol 49, Issue 1, p47
- ISSN
2083-4772
- Publication type
Article
- DOI
10.24425/aep.2023.144736