Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System

In this paper, a combined precipitation–flotation system is proposed for the removal of Fe(III), Zn(II), and Cd(II) as hydroxides. The efficiency of precipitation, as a function of pH, metal ion concentration, and dosage of the precipitating agent as the main variables, was evaluated. The results sh...

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Autores principales:	Leonor Zapién Zapién Serrano, Noemí Ortiz Ortiz Lara, Rafael Ríos Ríos Vera, Diana Cholico-González
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hydroxides precipitation flotation iron(III) zinc(II) cadmium(II) Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/82de28f69370489b881530f3fc13f9a9
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spelling	oai:doaj.org-article:82de28f69370489b881530f3fc13f9a92021-11-11T19:36:09ZRemoval of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System10.3390/su1321119132071-1050https://doaj.org/article/82de28f69370489b881530f3fc13f9a92021-10-01T00:00:00Zhttps://www.mdpi.com/2071-1050/13/21/11913https://doaj.org/toc/2071-1050In this paper, a combined precipitation–flotation system is proposed for the removal of Fe(III), Zn(II), and Cd(II) as hydroxides. The efficiency of precipitation, as a function of pH, metal ion concentration, and dosage of the precipitating agent as the main variables, was evaluated. The results showed that 99% efficiency was attained from a mixture solution containing the three metal ions in sulfate media at pH 10.3 after 15 min of treatment. The sedimentation behavior showed that a larger precipitate facilitated solid/liquid separation at 30 min. The characterization of precipitates was performed by X-ray diffraction (XRD) identifying iron, zinc, and cadmium oxides; hydroxides; and sodium sulfate. For the flotation, a 20 mg/L solution of dodecylamine (DDA) was used as a collector. Such a solution allowed for the removal of 76% of precipitates in concentrate. An increase in the collector concentration diminished the float percentage due to the micelle formation and low adsorption of the collector on the surface of the precipitate. The results provide evidence of the effectivity of the removal of metal ions by the combined precipitation–flotation system as an alternative for the treatment of acid mine drainage (AMD) in less time in comparison with a sedimentation stage.Leonor Zapién Zapién SerranoNoemí Ortiz Ortiz LaraRafael Ríos Ríos VeraDiana Cholico-GonzálezMDPI AGarticlehydroxidesprecipitationflotationiron(III)zinc(II)cadmium(II)Environmental effects of industries and plantsTD194-195Renewable energy sourcesTJ807-830Environmental sciencesGE1-350ENSustainability, Vol 13, Iss 11913, p 11913 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydroxides precipitation flotation iron(III) zinc(II) cadmium(II) Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350
spellingShingle	hydroxides precipitation flotation iron(III) zinc(II) cadmium(II) Environmental effects of industries and plants TD194-195 Renewable energy sources TJ807-830 Environmental sciences GE1-350 Leonor Zapién Zapién Serrano Noemí Ortiz Ortiz Lara Rafael Ríos Ríos Vera Diana Cholico-González Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
description	In this paper, a combined precipitation–flotation system is proposed for the removal of Fe(III), Zn(II), and Cd(II) as hydroxides. The efficiency of precipitation, as a function of pH, metal ion concentration, and dosage of the precipitating agent as the main variables, was evaluated. The results showed that 99% efficiency was attained from a mixture solution containing the three metal ions in sulfate media at pH 10.3 after 15 min of treatment. The sedimentation behavior showed that a larger precipitate facilitated solid/liquid separation at 30 min. The characterization of precipitates was performed by X-ray diffraction (XRD) identifying iron, zinc, and cadmium oxides; hydroxides; and sodium sulfate. For the flotation, a 20 mg/L solution of dodecylamine (DDA) was used as a collector. Such a solution allowed for the removal of 76% of precipitates in concentrate. An increase in the collector concentration diminished the float percentage due to the micelle formation and low adsorption of the collector on the surface of the precipitate. The results provide evidence of the effectivity of the removal of metal ions by the combined precipitation–flotation system as an alternative for the treatment of acid mine drainage (AMD) in less time in comparison with a sedimentation stage.
format	article
author	Leonor Zapién Zapién Serrano Noemí Ortiz Ortiz Lara Rafael Ríos Ríos Vera Diana Cholico-González
author_facet	Leonor Zapién Zapién Serrano Noemí Ortiz Ortiz Lara Rafael Ríos Ríos Vera Diana Cholico-González
author_sort	Leonor Zapién Zapién Serrano
title	Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
title_short	Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
title_full	Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
title_fullStr	Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
title_full_unstemmed	Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System
title_sort	removal of fe(iii), cd(ii), and zn(ii) as hydroxides by precipitation–flotation system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/82de28f69370489b881530f3fc13f9a9
work_keys_str_mv	AT leonorzapienzapienserrano removaloffeiiicdiiandzniiashydroxidesbyprecipitationflotationsystem AT noemiortizortizlara removaloffeiiicdiiandzniiashydroxidesbyprecipitationflotationsystem AT rafaelriosriosvera removaloffeiiicdiiandzniiashydroxidesbyprecipitationflotationsystem AT dianacholicogonzalez removaloffeiiicdiiandzniiashydroxidesbyprecipitationflotationsystem
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Removal of Fe(III), Cd(II), and Zn(II) as Hydroxides by Precipitation–Flotation System

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