The adsorption study of Royal Blue Tiafix and Black Tiassolan dyes using bone char as adsorbent
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2018
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In this study, the potential of bone char for Royal Blue Tiafix and Black Tiassolan dyes adsorption
from aqueous solutions was evaluated. The adsorbent was characterized physically and chemically
by adsorption/desorption of N2 at 77 K, scanning electron microscopy, X-ray diffraction, and
infrared spectroscopy. The equilibrium adsorption results for bone char can be successfully modeled by the Langmuir and Freundlich isotherms. Pseudo-first-order and pseudo-second-order
models were used to describe the kinetic data and rate constants were evaluated. Kinetics of
each dye was found to follow pseudo-second-order rate kinetic model, with great correlation
(higher than 0.99). In order to reduce the number of experiments to achieve better dye removal
efficiency, a 23 full factorial design with three central points and six axial points was applied in the
equilibrium experiments. The variables analyzed were agitation, temperature, and pH.
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Factorial design, Adsorbent, Bone char, Dye adsorption
Citação
MOURA, Rowander A.; SEOLATTO, Araceli A.; FERREIRA, Maria E. de Oliveira; FREITAS, Fernanda F. The adsorption study of Royal Blue Tiafix and Black Tiassolan dyes using bone char as adsorbent. Adsorption Science & Technology, London, v. 36 n. 3/4, p. 1178-1198, 2018. DOI: 10.1177/0263617418759776. DisponĂvel em: https://journals.sagepub.com/doi/10.1177/0263617418759776. Acesso em: 20 jun. 2023.