Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

Abstract In this study, cashew nut shells (CNS), waste from a cashew nut processing factory, have been used as an adsorbent for Pb(II) ions in water. Treatments of CNS with 1 M of H2SO4, HNO3, and NaOH solutions were performed to modify their surfaces and improve their adsorption capacities. Charact...

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Autores principales:	Kamchai Nuithitikul, Rapeeporn Phromrak, Wikanda Saengngoen
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bb4a2cd8753a43069b5f03cfa7d0501b
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spelling	oai:doaj.org-article:bb4a2cd8753a43069b5f03cfa7d0501b2021-12-02T11:02:17ZUtilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution10.1038/s41598-020-60161-92045-2322https://doaj.org/article/bb4a2cd8753a43069b5f03cfa7d0501b2020-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-60161-9https://doaj.org/toc/2045-2322Abstract In this study, cashew nut shells (CNS), waste from a cashew nut processing factory, have been used as an adsorbent for Pb(II) ions in water. Treatments of CNS with 1 M of H2SO4, HNO3, and NaOH solutions were performed to modify their surfaces and improve their adsorption capacities. Characterization of untreated and chemical-treated CNS was carried out using nitrogen adsorption isotherm, elemental (CHN) analysis, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX). In the study of Pb(II) removal, various models of adsorption kinetics and isotherms were evaluated against the experimental data. The results showed that H2SO4-treated CNS exhibited the highest adsorption capacity. The chemical treatment removes impurities, alters the surface functional groups and improves specific surface areas and pore volumes of native CNS significantly. Surface adsorption and intra-particle diffusion steps were found to substantially affect the overall adsorption process of Pb(II) on H2SO4-treated CNS. Owing to its easy preparation and comparable adsorption capacity, H2SO4-treated CNS has the potential to be developed as a low-cost adsorbent for the removal of Pb(II) from contaminated water.Kamchai NuithitikulRapeeporn PhromrakWikanda SaengngoenNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-14 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Kamchai Nuithitikul Rapeeporn Phromrak Wikanda Saengngoen Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
description	Abstract In this study, cashew nut shells (CNS), waste from a cashew nut processing factory, have been used as an adsorbent for Pb(II) ions in water. Treatments of CNS with 1 M of H2SO4, HNO3, and NaOH solutions were performed to modify their surfaces and improve their adsorption capacities. Characterization of untreated and chemical-treated CNS was carried out using nitrogen adsorption isotherm, elemental (CHN) analysis, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) equipped with energy dispersive X-ray analysis (EDX). In the study of Pb(II) removal, various models of adsorption kinetics and isotherms were evaluated against the experimental data. The results showed that H2SO4-treated CNS exhibited the highest adsorption capacity. The chemical treatment removes impurities, alters the surface functional groups and improves specific surface areas and pore volumes of native CNS significantly. Surface adsorption and intra-particle diffusion steps were found to substantially affect the overall adsorption process of Pb(II) on H2SO4-treated CNS. Owing to its easy preparation and comparable adsorption capacity, H2SO4-treated CNS has the potential to be developed as a low-cost adsorbent for the removal of Pb(II) from contaminated water.
format	article
author	Kamchai Nuithitikul Rapeeporn Phromrak Wikanda Saengngoen
author_facet	Kamchai Nuithitikul Rapeeporn Phromrak Wikanda Saengngoen
author_sort	Kamchai Nuithitikul
title	Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
title_short	Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
title_full	Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
title_fullStr	Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
title_full_unstemmed	Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution
title_sort	utilization of chemically treated cashew-nut shell as potential adsorbent for removal of pb(ii) ions from aqueous solution
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/bb4a2cd8753a43069b5f03cfa7d0501b
work_keys_str_mv	AT kamchainuithitikul utilizationofchemicallytreatedcashewnutshellaspotentialadsorbentforremovalofpbiiionsfromaqueoussolution AT rapeepornphromrak utilizationofchemicallytreatedcashewnutshellaspotentialadsorbentforremovalofpbiiionsfromaqueoussolution AT wikandasaengngoen utilizationofchemicallytreatedcashewnutshellaspotentialadsorbentforremovalofpbiiionsfromaqueoussolution
_version_	1718396312532025344

Utilization of chemically treated cashew-nut shell as potential adsorbent for removal of Pb(II) ions from aqueous solution

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