Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent

The adsorption capacity of a novel adsorbent (Ageratum conyzoide leaf powder) was investigated for Cr(VI) removal from aqueous solution. Experiments were designed with the Box�Behnken model of the response surface methodology (RSM). Preliminary experiments were conducted to obtain the optimum rang...

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Main Authors: Ezechi, E.H., Kutty, S.R.B.M., Isa, M.H., Liew, M.S.
Format: Article
Published: Taylor and Francis Inc. 2016
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952663833&doi=10.1080%2f19443994.2015.1129506&partnerID=40&md5=3a0792f40d74221bc998baf8875d2a54
http://eprints.utp.edu.my/25690/
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spelling my.utp.eprints.256902021-08-27T09:40:19Z Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent Ezechi, E.H. Kutty, S.R.B.M. Isa, M.H. Liew, M.S. The adsorption capacity of a novel adsorbent (Ageratum conyzoide leaf powder) was investigated for Cr(VI) removal from aqueous solution. Experiments were designed with the Box�Behnken model of the response surface methodology (RSM). Preliminary experiments were conducted to obtain the optimum range of process variables used for the Box�Behnken model. Three independent variables (pH, initial concentration, and adsorbent mass) were examined. The results show that Cr(VI) removal was more favorable at pH 2. Increase in pH above 2 resulted in negative Cr(VI) removal. Cr(VI) removal increased when adsorbent mass was increased, but decreased with increase in initial concentration. Cr(VI) removal of 92 was obtained at pH 2 and adsorbent mass of 0.3 g. Experiments were successfully optimized by RSM. Kinetics study correlated with the pseudo-second-order kinetic model, whereas equilibrium study was best described by the Langmuir isotherm model with maximum adsorption capacity of 437 mg/g. Thermodynamic parameters indicate a spontaneous, exothermic, and physiosorption process. © 2015 Balaban Desalination Publications. All rights reserved. Taylor and Francis Inc. 2016 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952663833&doi=10.1080%2f19443994.2015.1129506&partnerID=40&md5=3a0792f40d74221bc998baf8875d2a54 Ezechi, E.H. and Kutty, S.R.B.M. and Isa, M.H. and Liew, M.S. (2016) Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent. Desalination and Water Treatment, 57 (47). pp. 22507-22518. http://eprints.utp.edu.my/25690/
institution Universiti Teknologi Petronas
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continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description The adsorption capacity of a novel adsorbent (Ageratum conyzoide leaf powder) was investigated for Cr(VI) removal from aqueous solution. Experiments were designed with the Box�Behnken model of the response surface methodology (RSM). Preliminary experiments were conducted to obtain the optimum range of process variables used for the Box�Behnken model. Three independent variables (pH, initial concentration, and adsorbent mass) were examined. The results show that Cr(VI) removal was more favorable at pH 2. Increase in pH above 2 resulted in negative Cr(VI) removal. Cr(VI) removal increased when adsorbent mass was increased, but decreased with increase in initial concentration. Cr(VI) removal of 92 was obtained at pH 2 and adsorbent mass of 0.3 g. Experiments were successfully optimized by RSM. Kinetics study correlated with the pseudo-second-order kinetic model, whereas equilibrium study was best described by the Langmuir isotherm model with maximum adsorption capacity of 437 mg/g. Thermodynamic parameters indicate a spontaneous, exothermic, and physiosorption process. © 2015 Balaban Desalination Publications. All rights reserved.
format Article
author Ezechi, E.H.
Kutty, S.R.B.M.
Isa, M.H.
Liew, M.S.
spellingShingle Ezechi, E.H.
Kutty, S.R.B.M.
Isa, M.H.
Liew, M.S.
Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
author_facet Ezechi, E.H.
Kutty, S.R.B.M.
Isa, M.H.
Liew, M.S.
author_sort Ezechi, E.H.
title Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
title_short Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
title_full Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
title_fullStr Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
title_full_unstemmed Application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
title_sort application of response surface methodology for the optimization of hexavalent chromium removal using a new low-cost adsorbent
publisher Taylor and Francis Inc.
publishDate 2016
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84952663833&doi=10.1080%2f19443994.2015.1129506&partnerID=40&md5=3a0792f40d74221bc998baf8875d2a54
http://eprints.utp.edu.my/25690/
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