Investigation of thorium(IV) removal utilizing reduced graphene oxide-zinc oxide nanofibers via response surface methodology

Ikbal Gozde Kaptanoglu; Sabriye Yusan; Umit H. Kaynar; Sule Aytas; Sema Akyil Erenturk; Iro Dianellou

doi:10.1007/s10967-025-10095-1

Investigation of thorium(IV) removal utilizing reduced graphene oxide-zinc oxide nanofibers via response surface methodology

Ikbal Gozde Kaptanoglu^*, Sabriye Yusan, Umit H. Kaynar, Sule Aytas, Sema Akyil Erenturk, Iro Dianellou

^*Corresponding author for this work

Energy Institute

Research output: Contribution to journal › Article › peer-review

Abstract

This study examines the removal of Th(IV) ions from aqueous solutions using reduced graphene oxide-zinc oxide (rGO-ZnO) nanofibers synthesized via electrospinning. The nanofibers were characterized using XRD, SEM, FTIR, XPS, and zeta potential measurements. Response surface methodology optimized adsorption parameters, including pH, temperature, Th(IV) concentration, and adsorbent dosage. The Freundlich isotherm indicated heterogeneous adsorption, and thermodynamic analysis revealed an endothermic process with enhanced efficiency at higher temperatures. The maximum adsorption capacity was 99.73 mg/g, demonstrating the high performance of rGO-ZnO nanofibers. Competitive adsorption studies demonstrated high selectivity for Th(IV), demonstrating the potential of rGO-ZnO nanofibers for radioactive wastewater treatment.

Original language	English
Journal	Journal of Radioanalytical and Nuclear Chemistry
DOIs	https://doi.org/10.1007/s10967-025-10095-1
Publication status	Accepted/In press - 2025

Bibliographical note

Publisher Copyright:
© The Author(s) 2025.

Keywords

Adsorption
Reduced graphene oxide
Response surface methodology
Thorium(IV)
Zinc oxide nanofibers

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10.1007/s10967-025-10095-1

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title = "Investigation of thorium(IV) removal utilizing reduced graphene oxide-zinc oxide nanofibers via response surface methodology",

abstract = "This study examines the removal of Th(IV) ions from aqueous solutions using reduced graphene oxide-zinc oxide (rGO-ZnO) nanofibers synthesized via electrospinning. The nanofibers were characterized using XRD, SEM, FTIR, XPS, and zeta potential measurements. Response surface methodology optimized adsorption parameters, including pH, temperature, Th(IV) concentration, and adsorbent dosage. The Freundlich isotherm indicated heterogeneous adsorption, and thermodynamic analysis revealed an endothermic process with enhanced efficiency at higher temperatures. The maximum adsorption capacity was 99.73 mg/g, demonstrating the high performance of rGO-ZnO nanofibers. Competitive adsorption studies demonstrated high selectivity for Th(IV), demonstrating the potential of rGO-ZnO nanofibers for radioactive wastewater treatment.",

keywords = "Adsorption, Reduced graphene oxide, Response surface methodology, Thorium(IV), Zinc oxide nanofibers",

author = "Kaptanoglu, {Ikbal Gozde} and Sabriye Yusan and Kaynar, {Umit H.} and Sule Aytas and Erenturk, {Sema Akyil} and Iro Dianellou",

note = "Publisher Copyright: {\textcopyright} The Author(s) 2025.",

year = "2025",

doi = "10.1007/s10967-025-10095-1",

language = "English",

journal = "Journal of Radioanalytical and Nuclear Chemistry",

issn = "0236-5731",

publisher = "Akademiai Kiado ZRt.",

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TY - JOUR

T1 - Investigation of thorium(IV) removal utilizing reduced graphene oxide-zinc oxide nanofibers via response surface methodology

AU - Kaptanoglu, Ikbal Gozde

AU - Yusan, Sabriye

AU - Kaynar, Umit H.

AU - Aytas, Sule

AU - Erenturk, Sema Akyil

AU - Dianellou, Iro

N1 - Publisher Copyright: © The Author(s) 2025.

PY - 2025

Y1 - 2025

N2 - This study examines the removal of Th(IV) ions from aqueous solutions using reduced graphene oxide-zinc oxide (rGO-ZnO) nanofibers synthesized via electrospinning. The nanofibers were characterized using XRD, SEM, FTIR, XPS, and zeta potential measurements. Response surface methodology optimized adsorption parameters, including pH, temperature, Th(IV) concentration, and adsorbent dosage. The Freundlich isotherm indicated heterogeneous adsorption, and thermodynamic analysis revealed an endothermic process with enhanced efficiency at higher temperatures. The maximum adsorption capacity was 99.73 mg/g, demonstrating the high performance of rGO-ZnO nanofibers. Competitive adsorption studies demonstrated high selectivity for Th(IV), demonstrating the potential of rGO-ZnO nanofibers for radioactive wastewater treatment.

AB - This study examines the removal of Th(IV) ions from aqueous solutions using reduced graphene oxide-zinc oxide (rGO-ZnO) nanofibers synthesized via electrospinning. The nanofibers were characterized using XRD, SEM, FTIR, XPS, and zeta potential measurements. Response surface methodology optimized adsorption parameters, including pH, temperature, Th(IV) concentration, and adsorbent dosage. The Freundlich isotherm indicated heterogeneous adsorption, and thermodynamic analysis revealed an endothermic process with enhanced efficiency at higher temperatures. The maximum adsorption capacity was 99.73 mg/g, demonstrating the high performance of rGO-ZnO nanofibers. Competitive adsorption studies demonstrated high selectivity for Th(IV), demonstrating the potential of rGO-ZnO nanofibers for radioactive wastewater treatment.

KW - Adsorption

KW - Reduced graphene oxide

KW - Response surface methodology

KW - Thorium(IV)

KW - Zinc oxide nanofibers

UR - http://www.scopus.com/inward/record.url?scp=105002778339&partnerID=8YFLogxK

U2 - 10.1007/s10967-025-10095-1

DO - 10.1007/s10967-025-10095-1

M3 - Article

AN - SCOPUS:105002778339

SN - 0236-5731

JO - Journal of Radioanalytical and Nuclear Chemistry

JF - Journal of Radioanalytical and Nuclear Chemistry

ER -

Investigation of thorium(IV) removal utilizing reduced graphene oxide-zinc oxide nanofibers via response surface methodology

Abstract

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Keywords

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