Adsorptive removal of acid blue 113 and tartrazine by fly ash from single and binary dye solutions

Journal Article · Wed Jul 01 04:00:00 EDT 2009 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496390802437057· OSTI ID:21149656

Pura, S; Atun, G ^[1]

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1. Istanbul University, Avcilar (Turkey). Dept. of Chemistry

Adsorption of two acid dyestuffs, acid blue 113 (AB) and tartrazine (TA), has been studied from their single and binary solutions by using fly ash (FA) as an adsorbent. The S shaped isotherms observed for dye adsorption from single solutions show that both acid dyes are not preferred at a low concentration region whereas adsorption of the dyes from binary solutions is enhanced via solute-solute interactions. Although the L-shaped isotherm is observed in binary solutions adsorbability of AB decreases in concentrated solutions with respect to single one, time dependency of adsorption is well described with a pseudo-second-order kinetic model as well as the linear relation of Bt vs. t plots (not passing through origin) indicates that film diffusion is effective on dye adsorption. Modeled isotherm curves using isotherm parameters of the Freundlich and Dubinin-Radushkevich (D-R) equations adequately fit to experimental equilibrium data. Equilibrium adsorption of AB in binary solutions has been quite well predicted by the extended Freundlich and the Sheindorf-Rebuhn-Sheintuch (SRS) models. In general, the isotherm curves constructed in the temperature range of 298-328K show that the optimum temperature is 318K for AB removal from both single and binary solutions.

• OSTI ID: 21149656
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 1 Vol. 44; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORPTION
ADSORPTION ISOTHERMS
BINARY MIXTURES
DYES
FLY ASH
REMOVAL
SORPTIVE PROPERTIES
WASTE PRODUCT UTILIZATION
WATER TREATMENT