Optimization of adsorption of Cr(VI) from aqueous solution by adsorbent prepared from Leucaena leucocephala seed shell using design of experiment

The activated carbon was prepared from Leucaena leucocephala seed shell and used as adsorbent for the removal of hexavalent chromium [Cr(VI)] from aqueous solution. The variables affecting the adsorption process were optimized using response surface methodology (RSM). ANOVA revealed that all the var...

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Bibliographic Details
Published inSeparation science and technology Vol. 54; no. 15; pp. 2418 - 2430
Main Author Yusuff, Adeyinka S.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 13.10.2019
Taylor & Francis Ltd
Subjects
Activated carbon
Adsorbents
Adsorption
Aqueous solutions
characterization
Chromium
Design of experiments
Hexavalent chromium
isotherm
Isotherms
kinetic
Leucaena leucocephala
Optimization
Response surface methodology
Variance analysis
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Summary:The activated carbon was prepared from Leucaena leucocephala seed shell and used as adsorbent for the removal of hexavalent chromium [Cr(VI)] from aqueous solution. The variables affecting the adsorption process were optimized using response surface methodology (RSM). ANOVA revealed that all the variables studied had significant effects on the process. The obtained data showed that 71.49 mg/L initial Cr(VI) concentration, 4.22 solution pH, 0.57 g adsorbent dosage and 26.2 °C temperature resulted in 95.62% adsorption. Equilibrium adsorption isotherm and kinetic studies showed that Freundlich isotherm and the pseudo-second-order kinetic model fitted well to the experimental data.
ISSN:0149-6395
1520-5754
DOI:10.1080/01496395.2018.1547316