journal article·2025-04-14Open access

Removal of heavy metals lead and copper ions from waste water using green synthesized MnO2/Mn2O3 nanoparticles

VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria, I. Aouadj, H. Zerrouki, VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria, L. Zenkhri, VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria, M. S. Nedjimi, VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria, M. L. Belfar, VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria, S. Tlili, LARENZA Laboratory, Kasdi Merbah Ouargla University, 30000, Ouargla, Algeria, K. Mokadem, VPRS Laboratory, Faculty of Mathematics & Matter Sciences University of Kasdi Merbah, B.P. 511, 30000, Ouargla, Algeria

Abstract

The current study examined the removal of lead and copper ions from aqueous solutions using a variety of experimental techniques by producing manganese oxide sorbent nanoparticles (MnO2/Mn2O3-NPs) from a sunflower seed husk extract (Helianthus annuus). Key factors that affected the adsorption process were the pH level, contact time, starting metal ion concentration, and dose of the nanoadsorbent. Numerousanalytical methodswere employed to confirm the environmentally friendly manufacturing of MnO2/Mn2O3-NPs.According to the data, the MnO2/Mn2O3 -NP had an average size of roughly 26.93 nm.The adsorption reaction rate was analyzed by comparing pseudo-firstand pseudo-second-rate models.According to the recorded data, lead and copper ions adsorption response on the MnO2/Mn2O3-NPs agreed on the paradigm of pseudo-second order. Langmuir and Freundlich's models assessed lead and copper sorption onto the absorbed substance.Considering the parameters that each model yields, the Langmuir isotherms emerge as the favoured choice for the adsorption of Pb2+and Cu2+ions on MnO2/Mn2O3 nanoparticles. MnO2/Mn2O3-NPs show promise as an adsorbent material to remove heavy metals from water solutions.
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Research context

OpenAlex topics: Adsorption and biosorption for pollutant removal · Extraction and Separation Processes

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