Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study

The adsorption capacity of a neglected adsorbent, Ageratum conyzoides leaf powder (ACLP), was investigated in this study for effluent dye removal. The adsorbent was characterized using FESEM, FTIR, BET, XRF, XRD and EDX. The combined effects of three independent variables (pH, dye concentration and...

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Main Authors: Ezechi, E.H., Kutty, S.R.B.M., Malakahmad, A., Isa, M.H.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.26081 /
Published: Institution of Chemical Engineers 2015
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941330164&doi=10.1016%2fj.psep.2015.06.006&partnerID=40&md5=7cb3b6aced1491185d2b60349dee65b3
http://eprints.utp.edu.my/26081/
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spelling utp-eprints.260812021-08-30T08:51:28Z Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study Ezechi, E.H. Kutty, S.R.B.M. Malakahmad, A. Isa, M.H. The adsorption capacity of a neglected adsorbent, Ageratum conyzoides leaf powder (ACLP), was investigated in this study for effluent dye removal. The adsorbent was characterized using FESEM, FTIR, BET, XRF, XRD and EDX. The combined effects of three independent variables (pH, dye concentration and adsorbent concentration) were evaluated in a batch study through Box Behnken model of the response surface methodology (RSM) for experimental design, analysis and process optimization. Dye removal efficiency was monitored at a predetermined contact time of 20 min. Adsorption kinetics was examined by first and second order rate models, Elovich and intraparticle diffusion models, while equilibrium study was examined by Langmuir and Freundlich isotherm models. At optimum conditions of pH 4 and adsorbent concentration of 0.06 g, dye removal efficiency exceeded 90 and was successfully optimized by RSM. Adsorption kinetics was described by pseudo second order kinetic model while equilibrium study was represented by Langmuir isotherm with maximum adsorption capacity of 192.4 mg/g. Preconcentration of MB onto ACLP was investigated and a factor of 108.3 was obtained. ACLP was regenerated and could be reused for a minimum of 20 cycles. Thermodynamic studies show that adsorption was spontaneous and exothermic. The results illustrate that Ageratum conyzoides leaf powder could be effectively utilized for effluent dye removal. © 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. Institution of Chemical Engineers 2015 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941330164&doi=10.1016%2fj.psep.2015.06.006&partnerID=40&md5=7cb3b6aced1491185d2b60349dee65b3 Ezechi, E.H. and Kutty, S.R.B.M. and Malakahmad, A. and Isa, M.H. (2015) Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study. Process Safety and Environmental Protection, 98 . pp. 16-32. http://eprints.utp.edu.my/26081/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The adsorption capacity of a neglected adsorbent, Ageratum conyzoides leaf powder (ACLP), was investigated in this study for effluent dye removal. The adsorbent was characterized using FESEM, FTIR, BET, XRF, XRD and EDX. The combined effects of three independent variables (pH, dye concentration and adsorbent concentration) were evaluated in a batch study through Box Behnken model of the response surface methodology (RSM) for experimental design, analysis and process optimization. Dye removal efficiency was monitored at a predetermined contact time of 20 min. Adsorption kinetics was examined by first and second order rate models, Elovich and intraparticle diffusion models, while equilibrium study was examined by Langmuir and Freundlich isotherm models. At optimum conditions of pH 4 and adsorbent concentration of 0.06 g, dye removal efficiency exceeded 90 and was successfully optimized by RSM. Adsorption kinetics was described by pseudo second order kinetic model while equilibrium study was represented by Langmuir isotherm with maximum adsorption capacity of 192.4 mg/g. Preconcentration of MB onto ACLP was investigated and a factor of 108.3 was obtained. ACLP was regenerated and could be reused for a minimum of 20 cycles. Thermodynamic studies show that adsorption was spontaneous and exothermic. The results illustrate that Ageratum conyzoides leaf powder could be effectively utilized for effluent dye removal. © 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
format Article
author Ezechi, E.H.
Kutty, S.R.B.M.
Malakahmad, A.
Isa, M.H.
spellingShingle Ezechi, E.H.
Kutty, S.R.B.M.
Malakahmad, A.
Isa, M.H.
Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
author_sort Ezechi, E.H.
title Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
title_short Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
title_full Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
title_fullStr Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
title_full_unstemmed Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
title_sort characterization and optimization of effluent dye removal using a new low cost adsorbent: equilibrium, kinetics and thermodynamic study
publisher Institution of Chemical Engineers
publishDate 2015
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941330164&doi=10.1016%2fj.psep.2015.06.006&partnerID=40&md5=7cb3b6aced1491185d2b60349dee65b3
http://eprints.utp.edu.my/26081/
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score 11.62408

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