Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents

Water pollution by heavy metals has significant effects on aquatic ecosystems. Copper is one of the heavy metals that can cause environmental pollution and toxic effects in natural waters. This encourages the development of better technological alternatives for the removal of this pollutant. This wo...

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Autores principales:	Eduardo Leiva, Camila Tapia, Carolina Rodríguez
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	adsorption copper zinc-oxide nanoparticles nanomaterials acid mine drainage Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/5ea002e6400f49d4bd51631022789e0b
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spelling	oai:doaj.org-article:5ea002e6400f49d4bd51631022789e0b2021-11-11T19:52:39ZHighly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents10.3390/w132129602073-4441https://doaj.org/article/5ea002e6400f49d4bd51631022789e0b2021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/2960https://doaj.org/toc/2073-4441Water pollution by heavy metals has significant effects on aquatic ecosystems. Copper is one of the heavy metals that can cause environmental pollution and toxic effects in natural waters. This encourages the development of better technological alternatives for the removal of this pollutant. This work explores the application of ZnO nanoparticles (ZnO-NPs) for the removal of Cu(II) ions from acidic waters. ZnO NPs were characterized and adsorption experiments were performed under different acidic pHs to evaluate the removal of Cu(II) ions with ZnO NPs. The ZnO NPs were chemically stable under acidic conditions. The adsorption capacity of ZnO NPs for Cu(II) was up to 47.5 and 40.2 mg·g<sup>−1</sup> at pH 4.8 and pH 4.0, respectively. The results revealed that qmax (47.5 mg·g<sup>−1</sup>) and maximum removal efficiency of Cu(II) (98.4%) are achieved at pH = 4.8. In addition, the surface roughness of ZnO NPs decreases approximately 70% after adsorption of Cu(II) at pH 4. The Cu(II) adsorption behavior was more adequately explained by Temkin isotherm model. Additionally, adsorption kinetics were efficiently explained with the pseudo-second-order kinetic model. These results show that ZnO NPs can be an efficient alternative for the removal of Cu(II) from acidic waters and the adsorption process was more efficient under pH = 4.8. This study provides new information about the potential application of ZnO NPs as an effective adsorbent for the remediation and treatment of acidic waters contaminated with Cu(II).Eduardo LeivaCamila TapiaCarolina RodríguezMDPI AGarticleadsorptioncopperzinc-oxide nanoparticlesnanomaterialsacid mine drainageHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 2960, p 2960 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	adsorption copper zinc-oxide nanoparticles nanomaterials acid mine drainage Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	adsorption copper zinc-oxide nanoparticles nanomaterials acid mine drainage Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Eduardo Leiva Camila Tapia Carolina Rodríguez Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
description	Water pollution by heavy metals has significant effects on aquatic ecosystems. Copper is one of the heavy metals that can cause environmental pollution and toxic effects in natural waters. This encourages the development of better technological alternatives for the removal of this pollutant. This work explores the application of ZnO nanoparticles (ZnO-NPs) for the removal of Cu(II) ions from acidic waters. ZnO NPs were characterized and adsorption experiments were performed under different acidic pHs to evaluate the removal of Cu(II) ions with ZnO NPs. The ZnO NPs were chemically stable under acidic conditions. The adsorption capacity of ZnO NPs for Cu(II) was up to 47.5 and 40.2 mg·g<sup>−1</sup> at pH 4.8 and pH 4.0, respectively. The results revealed that qmax (47.5 mg·g<sup>−1</sup>) and maximum removal efficiency of Cu(II) (98.4%) are achieved at pH = 4.8. In addition, the surface roughness of ZnO NPs decreases approximately 70% after adsorption of Cu(II) at pH 4. The Cu(II) adsorption behavior was more adequately explained by Temkin isotherm model. Additionally, adsorption kinetics were efficiently explained with the pseudo-second-order kinetic model. These results show that ZnO NPs can be an efficient alternative for the removal of Cu(II) from acidic waters and the adsorption process was more efficient under pH = 4.8. This study provides new information about the potential application of ZnO NPs as an effective adsorbent for the remediation and treatment of acidic waters contaminated with Cu(II).
format	article
author	Eduardo Leiva Camila Tapia Carolina Rodríguez
author_facet	Eduardo Leiva Camila Tapia Carolina Rodríguez
author_sort	Eduardo Leiva
title	Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
title_short	Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
title_full	Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
title_fullStr	Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
title_full_unstemmed	Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
title_sort	highly efficient removal of cu(ii) ions from acidic aqueous solution using zno nanoparticles as nano-adsorbents
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5ea002e6400f49d4bd51631022789e0b
work_keys_str_mv	AT eduardoleiva highlyefficientremovalofcuiiionsfromacidicaqueoussolutionusingznonanoparticlesasnanoadsorbents AT camilatapia highlyefficientremovalofcuiiionsfromacidicaqueoussolutionusingznonanoparticlesasnanoadsorbents AT carolinarodriguez highlyefficientremovalofcuiiionsfromacidicaqueoussolutionusingznonanoparticlesasnanoadsorbents
_version_	1718431410742624256

Highly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents

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