Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis

In this present work, organo-modified rice husk (SMRH) adsorbent was prepared by using cetyltrimethyl ammonium bromide (CTAB) for removing Congo red (CR), a model anionic dye, from aqueous solution. The FTIR analysis indicated that CTAB was adsorbed onto the surface of rice husk. The adsorption wa...

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Main Authors: Chanut Bamroongwongdee, Songsiri Suwannee, Manit Kongsomsaksiri
Format: Article
Language:English
Published: Prince of Songkla University 2019-10-01
Series:Songklanakarin Journal of Science and Technology (SJST)
Subjects:
Online Access:https://rdo.psu.ac.th/sjstweb/journal/41-5/15.pdf
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spelling doaj-4942477ee1a44903989a89a7005e4cd62020-11-25T01:19:34ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952019-10-014151076108310.14456/sjst-psu.2019.135Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysisChanut Bamroongwongdee0Songsiri Suwannee1Manit Kongsomsaksiri2Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bang Sue, Bangkok, 10800 ThailandDepartment of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bang Sue, Bangkok, 10800 ThailandDepartment of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bang Sue, Bangkok, 10800 ThailandIn this present work, organo-modified rice husk (SMRH) adsorbent was prepared by using cetyltrimethyl ammonium bromide (CTAB) for removing Congo red (CR), a model anionic dye, from aqueous solution. The FTIR analysis indicated that CTAB was adsorbed onto the surface of rice husk. The adsorption was found to be favored at a lower pH. The amount of CR uptake was found to increase with increasing the initial CR concentration and contact time but decrease with increasing the amount of adsorbent. The equilibrium adsorption data were fitted well with the Langmuir model. The adsorption kinetics showed that CR adsorption onto SMRH followed the pseudo-second-order model. It was found that intra-particle diffusion was not the only rate-determining step. Thermodynamic studies revealed that CR adsorption onto SMRH was spontaneous and endothermic in nature.https://rdo.psu.ac.th/sjstweb/journal/41-5/15.pdfadsorptioncongo redmodified rice huskkineticsthermodynamics
collection DOAJ
language English
format Article
sources DOAJ
author Chanut Bamroongwongdee
Songsiri Suwannee
Manit Kongsomsaksiri
spellingShingle Chanut Bamroongwongdee
Songsiri Suwannee
Manit Kongsomsaksiri
Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
Songklanakarin Journal of Science and Technology (SJST)
adsorption
congo red
modified rice husk
kinetics
thermodynamics
author_facet Chanut Bamroongwongdee
Songsiri Suwannee
Manit Kongsomsaksiri
author_sort Chanut Bamroongwongdee
title Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
title_short Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
title_full Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
title_fullStr Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
title_full_unstemmed Adsorption of Congo red from aqueous solution by surfactant-modified rice husk: Kinetic, isotherm and thermodynamic analysis
title_sort adsorption of congo red from aqueous solution by surfactant-modified rice husk: kinetic, isotherm and thermodynamic analysis
publisher Prince of Songkla University
series Songklanakarin Journal of Science and Technology (SJST)
issn 0125-3395
publishDate 2019-10-01
description In this present work, organo-modified rice husk (SMRH) adsorbent was prepared by using cetyltrimethyl ammonium bromide (CTAB) for removing Congo red (CR), a model anionic dye, from aqueous solution. The FTIR analysis indicated that CTAB was adsorbed onto the surface of rice husk. The adsorption was found to be favored at a lower pH. The amount of CR uptake was found to increase with increasing the initial CR concentration and contact time but decrease with increasing the amount of adsorbent. The equilibrium adsorption data were fitted well with the Langmuir model. The adsorption kinetics showed that CR adsorption onto SMRH followed the pseudo-second-order model. It was found that intra-particle diffusion was not the only rate-determining step. Thermodynamic studies revealed that CR adsorption onto SMRH was spontaneous and endothermic in nature.
topic adsorption
congo red
modified rice husk
kinetics
thermodynamics
url https://rdo.psu.ac.th/sjstweb/journal/41-5/15.pdf
work_keys_str_mv AT chanutbamroongwongdee adsorptionofcongoredfromaqueoussolutionbysurfactantmodifiedricehuskkineticisothermandthermodynamicanalysis
AT songsirisuwannee adsorptionofcongoredfromaqueoussolutionbysurfactantmodifiedricehuskkineticisothermandthermodynamicanalysis
AT manitkongsomsaksiri adsorptionofcongoredfromaqueoussolutionbysurfactantmodifiedricehuskkineticisothermandthermodynamicanalysis
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