Change in pH and conductivity during the rinsing and the biosorption of copper ions onto pumpkin peel

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dc.citation.epage4
dc.citation.issue8
dc.citation.spage1
dc.citation.volume5
dc.contributor.authorMarković, Marina
dc.contributor.authorGorgievski, Milan
dc.contributor.authorMarković, Miljan
dc.contributor.authorGrekulović, Vesna
dc.contributor.authorŠtrbac, Nada
dc.contributor.authorZdravković, Milica
dc.contributor.authorBožinović, Kristina
dc.date.accessioned2025-08-21T08:10:45Z
dc.date.available2025-08-21T08:10:45Z
dc.date.issued2025
dc.description.abstractThe changes in pH and conductivity during the rinsing of the pumpkin peel, and the biosorption of Cu2+ ions, were the subject of this work. The obtained data showed that the pH value of the solutions increased during the rinsing of the biosorbent, as a result of the transfer of H+ ions from the aqueous phase into the structure of the pumpkin peel. An increase in the conductivity value was observed in the initial period of rinsing the pumpkin peel, followed by a decrease. The increase in conductivity in the initial phase contributed to the self-leaching of the alkali and alkaline earth metal ions from the structure of the pumpkin peel, which were transferred into the aqueous phase. The further decrease in conductivity is a result of the dilution of the aqueous phase. The pH value decreased during the biosorption of Cu2+ ions, as hydrogen ions were transferred from the pumpkin peel structure into the solution, and then exchanged with Cu2+ ions. The conductivity value increased during the biosorption process, with a rapid increase in the initial period of 5 minutes, due to the transfer of alkali and alkaline earth metal ions into the solution.
dc.identifier.doi10.57131/jstm.2025.8.1
dc.identifier.issn2744-2659
dc.identifier.issn2744-2640
dc.identifier.urihttps://repozitorijum.tfbor.bg.ac.rs/handle/123456789/5990
dc.language.isoen
dc.publisherUniversity of Zenica, Faculty of Metallurgy and Technology
dc.rights.licenseCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceJournal of Sustainable Technologies and Materials
dc.subjectbiosorption
dc.subjectpumpkin peel
dc.subjectpH
dc.subjectconductivity
dc.titleChange in pH and conductivity during the rinsing and the biosorption of copper ions onto pumpkin peel
dc.typearticle
dc.type.versionpublishedVersion

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