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CatalystsVolume 12, Issue 2, February 2022, Article number 224

Studies of Clinoptilolite-Rich Zeolitic Tuffs from Different Regions and Their Activity in Photodegradation of Methylene Blue(Article)(Open Access)

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  • aInnovation Center of Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11120, Serbia
  • bNational Institute of Chemistry, Department of Inorganic Chemistry and Technology, Hajdrihova 19, Ljubljana, SI-1001, Slovenia
  • cFaculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, Ljubljana, SI-1001, Slovenia
  • dGraduate School, University of Nova Gorica, Vipavska 13, Nova Gorica, SI-5000, Slovenia
  • eFaculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, 11120, Serbia

Abstract

The present study focuses on clinoptilolite (CLI)-rich natural zeolitic tuffs and their photocatalytic activity in the degradation of cationic organic dyes. CLI from different regions was tested in the photocatalytic degradation of methylene blue (MB) as a model cationic dye. The photocatalytic tests were performed at room temperature and atmospheric pressure under visible light irradiation. For all the CLI samples, the highest activity was observed at pH = 6. Total MB degradation varied between 70 and 91% (C0 = 10 mg dm–3, 0.2 g dm–3 of photocatalyst, during 300 min). It is suggested that the presence of Fe species in the studied tuffs is responsible for the pho-tocatalytic activity. The activity increases linearly with the Fe content in the tuffs. The MB photo-degradation follows the Langmuir–Hinshelwood kinetic model. The recyclability tests showed good stability and efficiency of the photocatalyst. The degradation rate decreased from 91 to 69% during three reaction cycles, indicating a promising potential of natural zeolites in the treatment of textile industry wastewater. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.

Author keywords

ClinoptiloliteNatural zeolitesOrganic dyesPhotocatalystPhotocatalytic activity

Funding details

Funding sponsor Funding number Acronym
Javna Agencija za Raziskovalno Dejavnost RSP1-0021,P1-0134ARRS
Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja200135,451-03-9/2022-14/200287,451-03-9/2022-14/200135MPNTR

  • 1

    Funding: This research was funded by the Ministry of Education, Science and Technological Development of the Republic of Serbia (Contract No. 451-03-9/2022-14/200287 and 451-03-9/2022-14/200135) and the Slovenian Research Agency (research programs P1-0021 and P1-0134).

  • ISSN: 20734344
  • Source Type: Journal
  • Original language: English
  • DOI: 10.3390/catal12020224
  • Document Type: Article
  • Publisher: MDPI

  Rajić, N.; Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, Belgrade, Serbia;
© Copyright 2022 Elsevier B.V., All rights reserved.

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Salah Elbanna, E. , Farghali, A.A. , Khedr, M.H.
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