Potential of Canola Stalk as Biosorbent for the Removal of Remazol Black B Reactive Dye from Aqueous Solutions

Autor:	Alireza Ashori, Mohammad Layeghi, Elham Azadeh, Yahya Hamzeh, Soheila Izadyar, Mahsa S. Mirfatahi Niaraki
Rok vydání:	2012
Předmět:	Langmuir Sorbent Aqueous solution General Chemical Engineering Kinetics Inorganic chemistry Langmuir adsorption model General Chemistry symbols.namesake chemistry.chemical_compound Adsorption chemistry symbols Reactive dye Organic chemistry General Materials Science Freundlich equation
Zdroj:	Journal of Wood Chemistry and Technology. 32:328-341
ISSN:	1532-2319 0277-3813
DOI:	10.1080/02773813.2012.688912
Popis:	In this study, the possible use of canola stalks, which are agricultural residues available in large quantities, for the removal of Remazol Black B (RBB) was investigated. Batch adsorption studies were carried out to examine the influence of various parameters. The results indicated that adsorption was strongly pH-dependent but slightly sorbent dose- and contact time-dependent. The Freundlich and Langmuir adsorption models were used for the mathematical description of adsorption equilibrium and isotherm constants at 25°C. Both models were applicable for the description of dye adsorption isotherm in the concentration range studied. However, the Langmuir model showed a higher correlation coefficient than the Freundlich model. According to the Langmuir model, the highest adsorption capacity was found to be 32.8 mg/g. Kinetic models, pseudo-first order and pseudo-second order were employed to describe the adsorption mechanism. The adsorption data followed the pseudo-second order kinetic model with re...
Databáze:	OpenAIRE
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