Raw Eggshell as an Adsorbent for Copper Ions Biosorption—Equilibrium, Kinetic, Thermodynamic and Process Optimization Studies

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dc.citation.issue2
dc.citation.rankM22
dc.citation.spage206
dc.citation.volume13
dc.contributor.authorMarković, Miljan
dc.contributor.authorGorgievski, Milan
dc.contributor.authorŠtrbac, Nada
dc.contributor.authorGrekulović, Vesna
dc.contributor.authorBožinović, Kristina
dc.contributor.authorZdravković, Milica
dc.contributor.authorVuković, Milovan
dc.date.accessioned2023-12-25T21:44:51Z
dc.date.available2023-12-25T21:44:51Z
dc.date.issued2023
dc.description.abstractThe study on the biosorption of copper ions using raw eggshells as an adsorbent is presented in this paper. The influence of different process parameters, such as: initial pH value of the solution, initial Cu2+ ions concentration, initial mass of the adsorbent, and stirring rate, on the biosorption capacity was evaluated. The SEM-EDS analysis was performed before and after the biosorption process. SEM micrographs indicate a change in the morphology of the sample after the biosorption process. The obtained EDS spectra indicated that K, Ca, and Mg were possibly exchanged with Cu2+ ions during the biosorption process. The equilibrium analysis showed that the Langmuir isotherm model best describes the experimental data. Four kinetic models were used to analyze the experimental data, and the results revealed that the pseudo-first order kinetic model is the best fit for the analyzed data. Calculated thermodynamic data indicated that the biosorption process is spontaneous, and that copper ions are possibly bound to the surface of the eggshells by chemisorption. The biosorption process was optimized using Response Surface Methodology (RSM) based on the Box-Behnken Design (BBD), with the selected factors: adsorbent mass, initial metal ion concentration, and contact time.
dc.identifier.doi10.3390/met13020206
dc.identifier.issn2075-4701
dc.identifier.urihttps://www.mdpi.com/2075-4701/13/2/206/htm
dc.identifier.urihttps://repozitorijum.tfbor.bg.ac.rs/handle/123456789/762
dc.language.isoen
dc.publisherMDPI, Switzerland
dc.rights.licenseCC-BY
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.sourceMetals
dc.subjectbiosorption
dc.subjectresponse surface methodology
dc.subjectBox-Behnken design
dc.subjecteggshell
dc.subjectequilibrium
dc.subjectkinetics
dc.subjectthermodynamics
dc.subjectcopper ions
dc.titleRaw Eggshell as an Adsorbent for Copper Ions Biosorption—Equilibrium, Kinetic, Thermodynamic and Process Optimization Studies
dc.typearticle
dc.type.versionpublishedVersion

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