eprintid: 5652
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/56/52
datestamp: 2023-11-09 16:17:23
lastmod: 2023-11-09 16:17:23
status_changed: 2023-11-09 16:03:28
type: article
metadata_visibility: show
creators_name: Ezechi, E.H.
creators_name: Kutty, S.R.B.M.
creators_name: Malakahmad, A.
creators_name: Isa, M.H.
title: Characterization and optimization of effluent dye removal using a new low cost adsorbent: Equilibrium, kinetics and thermodynamic study
ispublished: pub
keywords: Adsorption isotherms; Costs; Efficiency; Kinetics; Optimization; Thermodynamic properties; Thermodynamics, Adsorption kinetics; Ageratum conyzoides; Box-Behnken; Intraparticle diffusion models; Kinetics and thermodynamics; Langmuir and Freundlich isotherm models; Pseudo-second-order kinetic models; Response surface methodology, Adsorption
note: cited By 76
abstract: 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.
date: 2015
publisher: Institution of Chemical Engineers
official_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
id_number: 10.1016/j.psep.2015.06.006
full_text_status: none
publication: Process Safety and Environmental Protection
volume: 98
pagerange: 16-32
refereed: TRUE
issn: 09575820
citation:   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.  ISSN 09575820