TY  - JOUR
AU  - Suligoj, Andraz
AU  - Pavlović, Jelena
AU  - Arcon, Iztok
AU  - Rajić, Nevenka
AU  - Novak-Tusar, Nataša
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4455
AB  - Due to their adsorbent, ion exchange and catalytic properties zeolites are suitable for a variety of applications. We report on the photocatalytic activity of a readily available and inexpensive natural zeolite clinoptilolite (Z) containing SnO2 (Sn-Z). The Sn-Z samples with 3-15 wt. % of Sn were prepared by using a precipitation-deposition method. Powder X-ray diffraction analysis showed that the zeolite structure was unaffected by the introduction of the Sn-phase. Diffuse reflectance UV/VIS spectra of the Sn-Z samples confirmed the presence of SnO2 and X-Ray absorption spectroscopy analyses suggested that the SnO2 particles mainly resided on the surface of the clinoptilolite, while ATR-FTIR analysis gave some clues that part of the SnO2 phase was incorporated in the pores of the zeolite. The presence of SnO2 in Sn-Z increased both adsorption capacity and photocatalytic performance which could be partially explained by higher surface area and partially with an increased negative potential of the surface. Adsorption and total degradation of methylene blue (MB) for the Sn-Z with the highest amount of Sn (15 wt.%) was about 30% and 45%, respectively, suggesting a synergetic effect between SnO2 and the clinoptilolite lattice. Reusability tests showed that these catalysts present a promising material for water purification.
PB  - MDPI, Basel
T2  - Catalysts
T1  - SnO2-Containing Clinoptilolite as a Composite Photocatalyst for Dyes Removal from Wastewater under Solar Light
IS  - 2
VL  - 10
DO  - 10.3390/catal10020253
ER  - 

@article{
author = "Suligoj, Andraz and Pavlović, Jelena and Arcon, Iztok and Rajić, Nevenka and Novak-Tusar, Nataša",
year = "2020",
abstract = "Due to their adsorbent, ion exchange and catalytic properties zeolites are suitable for a variety of applications. We report on the photocatalytic activity of a readily available and inexpensive natural zeolite clinoptilolite (Z) containing SnO2 (Sn-Z). The Sn-Z samples with 3-15 wt. % of Sn were prepared by using a precipitation-deposition method. Powder X-ray diffraction analysis showed that the zeolite structure was unaffected by the introduction of the Sn-phase. Diffuse reflectance UV/VIS spectra of the Sn-Z samples confirmed the presence of SnO2 and X-Ray absorption spectroscopy analyses suggested that the SnO2 particles mainly resided on the surface of the clinoptilolite, while ATR-FTIR analysis gave some clues that part of the SnO2 phase was incorporated in the pores of the zeolite. The presence of SnO2 in Sn-Z increased both adsorption capacity and photocatalytic performance which could be partially explained by higher surface area and partially with an increased negative potential of the surface. Adsorption and total degradation of methylene blue (MB) for the Sn-Z with the highest amount of Sn (15 wt.%) was about 30% and 45%, respectively, suggesting a synergetic effect between SnO2 and the clinoptilolite lattice. Reusability tests showed that these catalysts present a promising material for water purification.",
publisher = "MDPI, Basel",
journal = "Catalysts",
title = "SnO2-Containing Clinoptilolite as a Composite Photocatalyst for Dyes Removal from Wastewater under Solar Light",
number = "2",
volume = "10",
doi = "10.3390/catal10020253"
}

Suligoj, A., Pavlović, J., Arcon, I., Rajić, N.,& Novak-Tusar, N.. (2020). SnO2-Containing Clinoptilolite as a Composite Photocatalyst for Dyes Removal from Wastewater under Solar Light. in Catalysts
MDPI, Basel., 10(2).
https://doi.org/10.3390/catal10020253

Suligoj A, Pavlović J, Arcon I, Rajić N, Novak-Tusar N. SnO2-Containing Clinoptilolite as a Composite Photocatalyst for Dyes Removal from Wastewater under Solar Light. in Catalysts. 2020;10(2).
doi:10.3390/catal10020253 .

Suligoj, Andraz, Pavlović, Jelena, Arcon, Iztok, Rajić, Nevenka, Novak-Tusar, Nataša, "SnO2-Containing Clinoptilolite as a Composite Photocatalyst for Dyes Removal from Wastewater under Solar Light" in Catalysts, 10, no. 2 (2020),
https://doi.org/10.3390/catal10020253 . .

TY  - JOUR
AU  - Jovanović, Mina
AU  - Arcon, Iztok
AU  - Kovač, Janez
AU  - Novak-Tusar, Nataša
AU  - Obradović, Bojana
AU  - Rajić, Nevenka
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3440
AB  - In this study the uptake capacity of Mn(II) ions by zeolite A beads was investigated for different initial Mn concentration (100-400 mg Mn dm(-3)) in batch mode at 25-55 degrees C. The obtained adsorption capacity varying from 30 to 50 mg Mn g(-1) demonstrated a high affinity of zeolite A towards Mn(II) present in solutions. Kinetic studies indicated the intra-particle diffusion as the rate limiting step up to 45 degrees C with apparent diffusivities in the range (1.2-2.0) x 10(-13) m(2) s(-1) and the activation energy of 21.9 kJ mol(-1), which implies strong interactions between the zeolite A and Mn ions. At 55 degrees C ion-exchange became the rate limiting step. The adsorption isotherms were studied at 25 degrees C showing that the Mn adsorption is the best described by the Langmuir model suggesting a homogenous zeolite surface. XPS analysis of the Mn-loaded beads showed that there is no surface accumulation of Mn but an almost uniform Mn distribution inside zeolite A, whereas XANES and EXAFS suggested that the adsorption of Mn(II) was followed by the Mn(II) oxidation and oxide formation. Regeneration of the spent zeolite was examined in 8 adsorption/desorption cycles by a chelating Na(2)EDTA in a fluidized column. It has been found that zeolite A beads could be reused for at least 4 cycles with satisfactory Mn(II) adsorption efficiencies of about 70%.
PB  - Elsevier Science Bv, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent
EP  - 385
SP  - 378
VL  - 226
DO  - 10.1016/j.micromeso.2016.02.026
ER  - 

@article{
author = "Jovanović, Mina and Arcon, Iztok and Kovač, Janez and Novak-Tusar, Nataša and Obradović, Bojana and Rajić, Nevenka",
year = "2016",
abstract = "In this study the uptake capacity of Mn(II) ions by zeolite A beads was investigated for different initial Mn concentration (100-400 mg Mn dm(-3)) in batch mode at 25-55 degrees C. The obtained adsorption capacity varying from 30 to 50 mg Mn g(-1) demonstrated a high affinity of zeolite A towards Mn(II) present in solutions. Kinetic studies indicated the intra-particle diffusion as the rate limiting step up to 45 degrees C with apparent diffusivities in the range (1.2-2.0) x 10(-13) m(2) s(-1) and the activation energy of 21.9 kJ mol(-1), which implies strong interactions between the zeolite A and Mn ions. At 55 degrees C ion-exchange became the rate limiting step. The adsorption isotherms were studied at 25 degrees C showing that the Mn adsorption is the best described by the Langmuir model suggesting a homogenous zeolite surface. XPS analysis of the Mn-loaded beads showed that there is no surface accumulation of Mn but an almost uniform Mn distribution inside zeolite A, whereas XANES and EXAFS suggested that the adsorption of Mn(II) was followed by the Mn(II) oxidation and oxide formation. Regeneration of the spent zeolite was examined in 8 adsorption/desorption cycles by a chelating Na(2)EDTA in a fluidized column. It has been found that zeolite A beads could be reused for at least 4 cycles with satisfactory Mn(II) adsorption efficiencies of about 70%.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent",
pages = "385-378",
volume = "226",
doi = "10.1016/j.micromeso.2016.02.026"
}

Jovanović, M., Arcon, I., Kovač, J., Novak-Tusar, N., Obradović, B.,& Rajić, N.. (2016). Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent. in Microporous and Mesoporous Materials
Elsevier Science Bv, Amsterdam., 226, 378-385.
https://doi.org/10.1016/j.micromeso.2016.02.026

Jovanović M, Arcon I, Kovač J, Novak-Tusar N, Obradović B, Rajić N. Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent. in Microporous and Mesoporous Materials. 2016;226:378-385.
doi:10.1016/j.micromeso.2016.02.026 .

Jovanović, Mina, Arcon, Iztok, Kovač, Janez, Novak-Tusar, Nataša, Obradović, Bojana, Rajić, Nevenka, "Removal of manganese in batch and fluidized bed systems using beads of zeolite a as adsorbent" in Microporous and Mesoporous Materials, 226 (2016):378-385,
https://doi.org/10.1016/j.micromeso.2016.02.026 . .