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Removal of phenol from aqueous phase by using neutralized red mud
Scopus
Toplam 169 atıf DOI
The objective of this study is to remove the phenol from aqueous solution by using the neutralized red mud in batch adsorption technique. The study was carried out as functions of contact time, pH, initial phenol concentration, red mud dosage and effect of salt addition. The experiments demonstrated that maximum phenol removal was obtained in a wide pH range of 1-9 and it takes 10 h to attain equilibrium. The adsorption data was analyzed using the Langmuir and the Freundlich isotherm models and it was found that the Freundlich isotherm model represented the measured sorption data well. The influence of addition of salt on phenol removal depends on the relative affinity of the anions for the red mud surface and the relative concentrations of the anions. © 2006 Elsevier Inc. All rights reserved.
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Increasing the phenol adsorption capacity of neutralized red mud by application of acid activation procedure
Scopus
Havuzumuzda 53 atıf almış
The objective of this study was to investigate the removal of phenol from aqueous solution by using acid activated red mud in batch adsorption experiments. The study was carried out as functions of pH, contact time, activated red mud dosage and initial phenol concentration. It was found that the maximum removal was obtained at pH below 8 and the adsorption equilibrium time was 10 h. Adsorption was followed the pseudo second-order kinetic model. According to the coefficient of determination and non-linear regression analysis carried out by Chisquare test, the Langmuir isotherm better represented the adsorption data in comparison to the Freundlich isotherm. The phenol adsorption capacity of the activated red mud (8.156 mg/g) was found to be higher than that of the neutralized red mud (4.127 mg/g) at pH 6 and 25±1°C. Negative ΔG0 value (-22.692 kJ/mol) indicated that the adsorption of phenol onto the activated red mud was spontaneous and feasible process. © 2008 Elsevier B.V. All rights reserved.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey