Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies

In this study, polythiophene/Al2O3 (PTh/Al2O3) and polyaniline/Al2O3 (PAn/Al2O3) nanocomposites in the presence of poly(vinyl alcohol) (PVA) as the surfactant were synthesized via in situ chemical oxidative polymerization method in aqueous medium. The synthesized nanocomposites were characterized by...

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Autores principales:	Zeynab Karimi, Reza Khalili, Mohammad Ali Zazouli
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption kinetic polyaniline polythiophene thermodynamic Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/b6fbfa5a6b5d4529b9560a9e5e75a7dd
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spelling	oai:doaj.org-article:b6fbfa5a6b5d4529b9560a9e5e75a7dd2021-11-06T11:11:54ZSurface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies0273-12231996-973210.2166/wst.2021.224https://doaj.org/article/b6fbfa5a6b5d4529b9560a9e5e75a7dd2021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/1/182https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732In this study, polythiophene/Al2O3 (PTh/Al2O3) and polyaniline/Al2O3 (PAn/Al2O3) nanocomposites in the presence of poly(vinyl alcohol) (PVA) as the surfactant were synthesized via in situ chemical oxidative polymerization method in aqueous medium. The synthesized nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Results indicated that the Al2O3 and poly(vinyl alcohol) influenced the properties of synthesized nanocomposites. The aim of this research was to investigate the sorption characteristics of polythiophene and polyaniline nanocomposites for the removal of heavy metal cations including Pb(II), Zn(II) and Cd(II) from aqueous solution. The factors that affected the adsorption equilibrium as well as the removal efficiency of the nanoadsorbents, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated in detail. From the kinetic results, it was concluded that the pseudo-second-order kinetic model was found to be the best at describing the adsorption process for Pb(II), Zn(II) and Cd(II) on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. In addition, thermodynamic analysis suggests the endothermic and spontaneous nature of the present adsorption process with increased entropy on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. The results suggest polythiophene, polyaniline and their nanocomposites have great potential to be used as efficient absorbent for the removal of heavy metal ions from water. Highlights Synthesis of polythiophene nanocomposites containing Al2O3.; Products were investigated in terms of morphology.; Batch adsorption experiment was performed for the removal of heavy metal ions.; pH played vital role in the removal process.; The factors that affected the adsorption equilibrium as well as the removal efficiency, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated.;Zeynab KarimiReza KhaliliMohammad Ali ZazouliIWA PublishingarticleadsorptionkineticpolyanilinepolythiophenethermodynamicEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 1, Pp 182-199 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption kinetic polyaniline polythiophene thermodynamic Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption kinetic polyaniline polythiophene thermodynamic Environmental technology. Sanitary engineering TD1-1066 Zeynab Karimi Reza Khalili Mohammad Ali Zazouli Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
description	In this study, polythiophene/Al2O3 (PTh/Al2O3) and polyaniline/Al2O3 (PAn/Al2O3) nanocomposites in the presence of poly(vinyl alcohol) (PVA) as the surfactant were synthesized via in situ chemical oxidative polymerization method in aqueous medium. The synthesized nanocomposites were characterized by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD). Results indicated that the Al2O3 and poly(vinyl alcohol) influenced the properties of synthesized nanocomposites. The aim of this research was to investigate the sorption characteristics of polythiophene and polyaniline nanocomposites for the removal of heavy metal cations including Pb(II), Zn(II) and Cd(II) from aqueous solution. The factors that affected the adsorption equilibrium as well as the removal efficiency of the nanoadsorbents, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated in detail. From the kinetic results, it was concluded that the pseudo-second-order kinetic model was found to be the best at describing the adsorption process for Pb(II), Zn(II) and Cd(II) on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. In addition, thermodynamic analysis suggests the endothermic and spontaneous nature of the present adsorption process with increased entropy on PTh-PVA/Al2O3 and PAn-PVA/Al2O3. The results suggest polythiophene, polyaniline and their nanocomposites have great potential to be used as efficient absorbent for the removal of heavy metal ions from water. Highlights Synthesis of polythiophene nanocomposites containing Al2O3.; Products were investigated in terms of morphology.; Batch adsorption experiment was performed for the removal of heavy metal ions.; pH played vital role in the removal process.; The factors that affected the adsorption equilibrium as well as the removal efficiency, i.e., contact time, metal ion concentration, pH and adsorption conditions were investigated.;
format	article
author	Zeynab Karimi Reza Khalili Mohammad Ali Zazouli
author_facet	Zeynab Karimi Reza Khalili Mohammad Ali Zazouli
author_sort	Zeynab Karimi
title	Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
title_short	Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
title_full	Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
title_fullStr	Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
title_full_unstemmed	Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
title_sort	surface modified polythiophene/al2o3 and polyaniline/al2o3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/b6fbfa5a6b5d4529b9560a9e5e75a7dd
work_keys_str_mv	AT zeynabkarimi surfacemodifiedpolythiopheneal2o3andpolyanilineal2o3nanocompositesusingpolyvinylalcoholfortheremovalofheavymetalionsfromwaterkineticsthermodynamicandisothermstudies AT rezakhalili surfacemodifiedpolythiopheneal2o3andpolyanilineal2o3nanocompositesusingpolyvinylalcoholfortheremovalofheavymetalionsfromwaterkineticsthermodynamicandisothermstudies AT mohammadalizazouli surfacemodifiedpolythiopheneal2o3andpolyanilineal2o3nanocompositesusingpolyvinylalcoholfortheremovalofheavymetalionsfromwaterkineticsthermodynamicandisothermstudies
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Surface modified polythiophene/Al2O3 and polyaniline/Al2O3 nanocomposites using poly(vinyl alcohol) for the removal of heavy metal ions from water: kinetics, thermodynamic and isotherm studies

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