Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism

Hydroxyapatite (HAp) was synthesized from biowaste hen eggshells by wet precipitation method in which calcium hydroxide and phosphoric acid were used as precursors. The effectiveness of uranium(VI) adsorption onto HAp was investigated by batch adsorption experiments from aqueous solutions. The obtai...

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Autores principales:	Safir Ouassel, Salah Chegrouche, Djamel Nibou, Redouane Melikchi, Abderahmane Aknoun, Abdelhamid Mellah
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	adsorption hydroxyapatite kinetics mechanism thermodynamics u(vi) Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/d56f9ea952304e09acf534af0314b797
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spelling	oai:doaj.org-article:d56f9ea952304e09acf534af0314b7972021-11-06T10:51:03ZApplication of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism0273-12231996-973210.2166/wst.2021.022https://doaj.org/article/d56f9ea952304e09acf534af0314b7972021-03-01T00:00:00Zhttp://wst.iwaponline.com/content/83/5/1198https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Hydroxyapatite (HAp) was synthesized from biowaste hen eggshells by wet precipitation method in which calcium hydroxide and phosphoric acid were used as precursors. The effectiveness of uranium(VI) adsorption onto HAp was investigated by batch adsorption experiments from aqueous solutions. The obtained HAp powder was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectrometry, point of zero charge and Scanning electron microscope. The factors and levels used during the experiments were pH (2–5), adsorbent mass (0.01–0.05 g), and initial U(VI) concentration (100–310 mg L−1). A Box–Behnken design combined with analysis of variance was used to interpret the main effect influencing the adsorption. The results showed that pH was the most significant parameter affecting U(VI). The kinetic data correlates well with the pseudo-second-order model. The adsorption isotherms fitted the Langmuir-1 type model with the qmax = 175.22 mg g−1 at 25 °C. The calculated value of the mean free energy indicates the chemisorption process. Under optimal conditions, the uranium effluent derived from the precipitation of ammonium uranyl carbonate removal performance of 98% was achieved. This study proved that HAp prepared from eggshell was an ecofriendly and low-cost adsorbent and was very effective for the adsorption of U(VI) from aqueous solutions.Safir OuasselSalah ChegroucheDjamel NibouRedouane MelikchiAbderahmane AknounAbdelhamid MellahIWA Publishingarticleadsorptionhydroxyapatitekineticsmechanismthermodynamicsu(vi)Environmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 5, Pp 1198-1216 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption hydroxyapatite kinetics mechanism thermodynamics u(vi) Environmental technology. Sanitary engineering TD1-1066
spellingShingle	adsorption hydroxyapatite kinetics mechanism thermodynamics u(vi) Environmental technology. Sanitary engineering TD1-1066 Safir Ouassel Salah Chegrouche Djamel Nibou Redouane Melikchi Abderahmane Aknoun Abdelhamid Mellah Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
description	Hydroxyapatite (HAp) was synthesized from biowaste hen eggshells by wet precipitation method in which calcium hydroxide and phosphoric acid were used as precursors. The effectiveness of uranium(VI) adsorption onto HAp was investigated by batch adsorption experiments from aqueous solutions. The obtained HAp powder was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectrometry, point of zero charge and Scanning electron microscope. The factors and levels used during the experiments were pH (2–5), adsorbent mass (0.01–0.05 g), and initial U(VI) concentration (100–310 mg L−1). A Box–Behnken design combined with analysis of variance was used to interpret the main effect influencing the adsorption. The results showed that pH was the most significant parameter affecting U(VI). The kinetic data correlates well with the pseudo-second-order model. The adsorption isotherms fitted the Langmuir-1 type model with the qmax = 175.22 mg g−1 at 25 °C. The calculated value of the mean free energy indicates the chemisorption process. Under optimal conditions, the uranium effluent derived from the precipitation of ammonium uranyl carbonate removal performance of 98% was achieved. This study proved that HAp prepared from eggshell was an ecofriendly and low-cost adsorbent and was very effective for the adsorption of U(VI) from aqueous solutions.
format	article
author	Safir Ouassel Salah Chegrouche Djamel Nibou Redouane Melikchi Abderahmane Aknoun Abdelhamid Mellah
author_facet	Safir Ouassel Salah Chegrouche Djamel Nibou Redouane Melikchi Abderahmane Aknoun Abdelhamid Mellah
author_sort	Safir Ouassel
title	Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
title_short	Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
title_full	Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
title_fullStr	Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
title_full_unstemmed	Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
title_sort	application of response surface methodology for uranium(vi) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/d56f9ea952304e09acf534af0314b797
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Application of response surface methodology for uranium(VI) adsorption using hydroxyapatite prepared from eggshells waste material: study of influencing factors and mechanism

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