pH and conductivity change during the rinsing and adsorption of copper ions onto walnut shells

Marković, Miljan; Gorgievski, Milan; Štrbac, Nada; Grekulović, Vesna; Mitovski, Aleksandra; Božinović, Kristina; Zdravković, Milica

Conference Object Open access M33

Proceedings_IOC_2021-128-131full.pdf (2.05MB)

2021

Marković, Miljan
Gorgievski, Milan
Štrbac, Nada
Grekulović, Vesna
Mitovski, Aleksandra
Božinović, Kristina
Zdravković, Milica

University of Belgrade, Technical Faculty in Bor

Proceedings - 52nd International October Conference on Mining and Metallurgy - IOC 2021, November 29th - 30th 2021, Bor, Serbia, 2021, 113-116

113

116

English

M33 - Conference paper at an international conference, printed in full

The change in pH and conductivity values during the rinsing of the walnut shells as well as during the adsorption of copper ions wasinvestigated in this study. The pH value increases during the rinsing of the adsorbent, reaching a constant value after the passing of 100 ml of distilled water. The increase in the pH value during the rinsing of the adsorbent occurs as a result of the transfer of H+ ions from the aqueous phase into the molecular structure of the adsorbent, where they are exchanged with alkali and alkaline- earth metal ions. As for conductivity change, a sudden increase in conductivity occurs after passing the first 50 ml of distilled water, followed by a decrease in conductivity with further rinsing. The increase in conductivity is most likely caused by the increase in the concentration of alkali and alkaline earth metal ions in the solution, which are being transferred from the adsorbent structure into the aqueous phase. During the adsorption process, the pH value rapidly increases for the first few minutes, after which starts to decline. The release of H+ ions from the adsorbent structure into the aqueous phase causes a rapid decrease in pH value as a result of the deprotonation of functional groups in the adsorbent molecular structure. The conductivity increases during the adsorption process. This increase is due to an increase in the concentration of alkali and alkaline earth metal ions in the solution, which are exchanged with copper ions during the adsorption process.

Adsorption, copper ions, walnut shells, pH, conductivity

ISBN

978‐86‐6305‐119‐5

URI

https://ioc.tfbor.bg.ac.rs/public/2021/Proce...
https://repozitorijum.tfbor.bg.ac.rs/handle/...

dc.rights.license	CC-BY-NC-ND
dc.date.accessioned	2023-12-26T09:23:20Z
dc.date.available	2023-12-26T09:23:20Z
dc.date.issued	2021
dc.identifier.isbn	978‐86‐6305‐119‐5
dc.identifier.uri	https://ioc.tfbor.bg.ac.rs/public/2021/Proceedings_IOC_2021.pdf
dc.identifier.uri	https://repozitorijum.tfbor.bg.ac.rs/handle/123456789/2710
dc.description.abstract	The change in pH and conductivity values during the rinsing of the walnut shells as well as during the adsorption of copper ions wasinvestigated in this study. The pH value increases during the rinsing of the adsorbent, reaching a constant value after the passing of 100 ml of distilled water. The increase in the pH value during the rinsing of the adsorbent occurs as a result of the transfer of H+ ions from the aqueous phase into the molecular structure of the adsorbent, where they are exchanged with alkali and alkaline- earth metal ions. As for conductivity change, a sudden increase in conductivity occurs after passing the first 50 ml of distilled water, followed by a decrease in conductivity with further rinsing. The increase in conductivity is most likely caused by the increase in the concentration of alkali and alkaline earth metal ions in the solution, which are being transferred from the adsorbent structure into the aqueous phase. During the adsorption process, the pH value rapidly increases for the first few minutes, after which starts to decline. The release of H+ ions from the adsorbent structure into the aqueous phase causes a rapid decrease in pH value as a result of the deprotonation of functional groups in the adsorbent molecular structure. The conductivity increases during the adsorption process. This increase is due to an increase in the concentration of alkali and alkaline earth metal ions in the solution, which are exchanged with copper ions during the adsorption process.
dc.language.iso	en
dc.publisher	University of Belgrade, Technical Faculty in Bor
dc.source	Proceedings - 52nd International October Conference on Mining and Metallurgy - IOC 2021, November 29th - 30th 2021, Bor, Serbia, 2021, 113-116
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Adsorption
dc.subject	copper ions
dc.subject	walnut shells
dc.subject	pH
dc.subject	conductivity
dc.title	pH and conductivity change during the rinsing and adsorption of copper ions onto walnut shells
dc.type	conferenceObject
dc.type.version	publishedVersion
dc.citation.spage	113
dc.citation.epage	116
dc.creator	Marković, Miljan
dc.citation.rank	M33
dc.creator	Gorgievski, Milan
dc.creator	Štrbac, Nada
dc.creator	Grekulović, Vesna
dc.creator	Mitovski, Aleksandra
dc.creator	Božinović, Kristina
dc.creator	Zdravković, Milica


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