Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch

In this study, two types of modified cassava starch samples (MCS and MWS) prepared from commercially available native cassava starch (NCS) and native cassava starch extracted using the wet method (NWS) were investigated for the removal of Pb(II) ions from aqueous solutions. MCS and MWS samples were...

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Main Authors:	O. H. P. Gunawardene, C. A. Gunathilake, A. P. S. M. Amaraweera, N. M. L. Fernando, A. Manipura, W. A. Manamperi, K. M. A. K. Kulatunga, S. M. Rajapaksha, A. Gamage, R. S. Dassanayake, B. G. N. D. Weerasekara, P. N. K. Fernando, C. A. N. Fernando, J. A. S. C. Jayasinghe
Format:	Article
Language:	English
Published:	MDPI AG 2021-02-01
Series:	Journal of Composites Science
Subjects:	cassava starch modified starch TEOS Lead removal Pluronic (P123)
Online Access:	https://www.mdpi.com/2504-477X/5/2/46

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spelling	doaj-fe2fe1c4cdfc41e0b1963ce081d093fc2021-02-04T00:00:17ZengMDPI AGJournal of Composites Science2504-477X2021-02-015464610.3390/jcs5020046Removal of Pb(II) Ions from Aqueous Solution Using Modified StarchO. H. P. Gunawardene0C. A. Gunathilake1A. P. S. M. Amaraweera2N. M. L. Fernando3A. Manipura4W. A. Manamperi5K. M. A. K. Kulatunga6S. M. Rajapaksha7A. Gamage8R. S. Dassanayake9B. G. N. D. Weerasekara10P. N. K. Fernando11C. A. N. Fernando12J. A. S. C. Jayasinghe13Department of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaMaterials Engineering Department, California Polytechnic State University, San Luis Obispo, CA 93407, USADepartment of Manufacturing and Industrial Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Materials and Mechanical Technology, Faculty of Technology, University of Sri Jayewardenepura, Nugegoda 10250, Sri LankaDepartment of Chemical and Process Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaDepartment of Biosystems Technology, Faculty of Technology, University of Sri Jayewardenepura, Gangodawila, Nugegoda 10100, Sri LankaDepartment of Nano Science Technology, Faculty of Technology, Wayamba University of Sri Lanka, Kuliyapitiya 60200, Sri LankaDepartment of Chemistry, Faculty of Graduate Studies, University of Kelaniya, Kelaniya 11300, Sri LankaDepartment of Nano Science Technology, Faculty of Technology, Wayamba University of Sri Lanka, Kuliyapitiya 60200, Sri LankaDepartment of Civil Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya 20400, Sri LankaIn this study, two types of modified cassava starch samples (MCS and MWS) prepared from commercially available native cassava starch (NCS) and native cassava starch extracted using the wet method (NWS) were investigated for the removal of Pb(II) ions from aqueous solutions. MCS and MWS samples were synthesized under acidic conditions using Pluronic 123 as the structure-directing agent and tetraethylorthosilicate (TEOS) as the chemical modifying agent. Modified starch samples were characterized using Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray Diffraction (XRD), and a nitrogen (N<sub>2</sub>) gas adsorption–desorption analyser. MCS and MWS showed enhanced thermal stabilities upon acid hydrolysis and chemical modification. The effects of contact time and initial Pb(II) concentration were studied through batch adsorption experiments. Adsorption kinetics followed the pseudo-second-order kinetic model. The equilibrium adsorption data were analysed and compared by the Langmuir and Freundlich adsorption models. The coefficient correlation (R<sup>2</sup>) was employed as a measure of the fit. The Langmuir model fitted well with equilibrium adsorption data, giving a maximum Pb(II) adsorption capacity of 370.37 and 294.12 mg/g for MWS and MCS, respectively. Modified samples exhibited a higher desorption efficiency of over 97%. This study demonstrated that modified starch could be utilized for Pb(II) removal from industrial wastewater.https://www.mdpi.com/2504-477X/5/2/46cassava starchmodified starchTEOSLead removalPluronic (P123)
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	O. H. P. Gunawardene C. A. Gunathilake A. P. S. M. Amaraweera N. M. L. Fernando A. Manipura W. A. Manamperi K. M. A. K. Kulatunga S. M. Rajapaksha A. Gamage R. S. Dassanayake B. G. N. D. Weerasekara P. N. K. Fernando C. A. N. Fernando J. A. S. C. Jayasinghe
spellingShingle	O. H. P. Gunawardene C. A. Gunathilake A. P. S. M. Amaraweera N. M. L. Fernando A. Manipura W. A. Manamperi K. M. A. K. Kulatunga S. M. Rajapaksha A. Gamage R. S. Dassanayake B. G. N. D. Weerasekara P. N. K. Fernando C. A. N. Fernando J. A. S. C. Jayasinghe Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch Journal of Composites Science cassava starch modified starch TEOS Lead removal Pluronic (P123)
author_facet	O. H. P. Gunawardene C. A. Gunathilake A. P. S. M. Amaraweera N. M. L. Fernando A. Manipura W. A. Manamperi K. M. A. K. Kulatunga S. M. Rajapaksha A. Gamage R. S. Dassanayake B. G. N. D. Weerasekara P. N. K. Fernando C. A. N. Fernando J. A. S. C. Jayasinghe
author_sort	O. H. P. Gunawardene
title	Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch
title_short	Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch
title_full	Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch
title_fullStr	Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch
title_full_unstemmed	Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch
title_sort	removal of pb(ii) ions from aqueous solution using modified starch
publisher	MDPI AG
series	Journal of Composites Science
issn	2504-477X
publishDate	2021-02-01
description	In this study, two types of modified cassava starch samples (MCS and MWS) prepared from commercially available native cassava starch (NCS) and native cassava starch extracted using the wet method (NWS) were investigated for the removal of Pb(II) ions from aqueous solutions. MCS and MWS samples were synthesized under acidic conditions using Pluronic 123 as the structure-directing agent and tetraethylorthosilicate (TEOS) as the chemical modifying agent. Modified starch samples were characterized using Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), X-ray Diffraction (XRD), and a nitrogen (N<sub>2</sub>) gas adsorption–desorption analyser. MCS and MWS showed enhanced thermal stabilities upon acid hydrolysis and chemical modification. The effects of contact time and initial Pb(II) concentration were studied through batch adsorption experiments. Adsorption kinetics followed the pseudo-second-order kinetic model. The equilibrium adsorption data were analysed and compared by the Langmuir and Freundlich adsorption models. The coefficient correlation (R<sup>2</sup>) was employed as a measure of the fit. The Langmuir model fitted well with equilibrium adsorption data, giving a maximum Pb(II) adsorption capacity of 370.37 and 294.12 mg/g for MWS and MCS, respectively. Modified samples exhibited a higher desorption efficiency of over 97%. This study demonstrated that modified starch could be utilized for Pb(II) removal from industrial wastewater.
topic	cassava starch modified starch TEOS Lead removal Pluronic (P123)
url	https://www.mdpi.com/2504-477X/5/2/46
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Removal of Pb(II) Ions from Aqueous Solution Using Modified Starch

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