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Adsorption of Neutral Red Dye from an Aqueous Solution onto Natural Sepiolite Using Full Factorial Design

Published online by Cambridge University Press:  01 January 2024

Semra Çoruh ,
Feza Geyikçi  and
Sermin Elevli
Semra Çoruh*
Affiliation:
Department of Environmental Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
Feza Geyikçi
Affiliation:
Department of Chemical Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
Sermin Elevli
Affiliation:
Department of Industrial Engineering, Ondokuz Mayıs University, 55139 Samsun, Turkey
*
* E-mail address of corresponding author: semcoruh@omu.edu.tr
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Abstract

The main objective of factorial design is to construct an empirical model to understand complex phenomena such as a purification process up to a given level of accuracy. The present study aimed to investigate the adsorption of Neutral Red dye (NR) from an aqueous solution onto sepiolite using 24 full factorial design. The combined effect of initial dye concentration, adsorbent dosage, pH, and particle size on adsorption of the dye was studied. The results were analyzed statistically using the student’s t-test, analysis of variance (ANOVA), and an F-test to define important experimental factors and their relative levels of importance. A regression model which may be used to estimate the removal efficiency of NR without performing any experiments was suggested. The coefficient of determination (R2 = 0.9938) indicated that <1% only of the total variations remain unexplained by the regression model. The experimental factors selected were determined to influence the adsorption process, but their relative importance varied according to the following sequence: pH > adsorbent dosage > particle size > initial concentration. The magnitude of the effects measured in this work can be used as a guide for how to adapt the adsorption process for different process conditions. The results also indicated that natural sepiolite is a suitable adsorbent for NR.

Keywords

AdsorptionFull Factorial DesignNeutral RedSepiolite
Type
Article
Information
Clays and Clay Minerals , Volume 59 , Issue 6 , December 2011 , pp. 617 - 625
Copyright
Copyright © Clay Minerals Society 2011

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