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

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dc.contributor.authorLeiva, Eduardo
dc.contributor.authorTapia, Camila
dc.contributor.authorRodriguez, Carolina
dc.date.accessioned2025-01-20T22:05:14Z
dc.date.available2025-01-20T22:05:14Z
dc.date.issued2021
dc.description.abstractWater 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(-1) at pH 4.8 and pH 4.0, respectively. The results revealed that qmax (47.5 mg.g(-1)) 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).
dc.fuente.origenWOS
dc.identifier.doi10.3390/w13212960
dc.identifier.eissn2073-4441
dc.identifier.urihttps://doi.org/10.3390/w13212960
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/94130
dc.identifier.wosidWOS:000718595200001
dc.issue.numero21
dc.language.isoen
dc.revistaWater
dc.rightsacceso restringido
dc.subjectadsorption
dc.subjectcopper
dc.subjectzinc-oxide nanoparticles
dc.subjectnanomaterials
dc.subjectacid mine drainage
dc.subject.ods06 Clean Water and Sanitation
dc.subject.odspa06 Agua limpia y saneamiento
dc.titleHighly Efficient Removal of Cu(II) Ions from Acidic Aqueous Solution Using ZnO Nanoparticles as Nano-Adsorbents
dc.typeartículo
dc.volumen13
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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