Abstract:
:Red mud, an industrial by-product generated during the processing of bauxite ore, was investigated as an inexpensive and effective adsorbent for the adsorption of methylene blue from aqueous solution. Chemical and heat treatments were applied to the raw red mud. The effects of contact time, adsorbent amount, pH, temperature and initial dye concentration were investigated. The adsorption isotherm and kinetics of the raw and activated red mud were studied. Freundlich, Temkin and Dubinin-Radushkevich isotherms were obtained using concentrations of methylene blue ranging from 10 to 70 mg/L. The results indicated that the Dubinin-Radushkevich model provides the best correlation of the experimental data. The adsorption rate data were analysed according to the pseudo-first order kinetic, pseudo-second order kinetic, intraparticle diffusion kinetic and Elovich kinetic models. The pseudo-second order kinetic was the best fit kinetic model for the experimental data.
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Coruh S,Geyikçi F,Ergun ONdoi
10.1080/09593330.2010.529946subject
Has Abstractpub_date
2011-08-01 00:00:00pages
1183-93issue
11-12eissn
0959-3330issn
1479-487Xjournal_volume
32pub_type
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