TY  - CONF
AU  - Kalebić, Barbara
AU  - Škoro, Nikola
AU  - Kovač, Janez
AU  - Rajić, Nevenka
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6573
AB  - The use of antibiotics constantly increases which has a notable negative impact on water bodies. Ciprofloxacin (CIP) is widely applied
antibiotic in both human and veterinary medicine, as well as in a livestock breeding. Due to its extensive use, CIP has been found in
wastewater effluents in a wide concentration range from ng to mg dm^(–3). An extremely high concentration of up to 50 mg dm^(–3)
has been found near drug manufacturing plants [1]. Since CIP, as well as many other pharmaceuticals, cannot be efficiently removed
from wastewater streams by conventional wastewater treatments, it is of a great importance to find an acceptable method for their
removal.
This study reports the use of natural calcium-rich clinoptilolite (CLI) for the adsorption of CIP and regeneration of the spent adsorbent
(CLI-CIP) by non-thermal atmospheric pressure plasma (NTP). The results show that the CLI possesses a high adsorption efficiency in
removal of CIP at 283, 288 and 293 K in a slightly acidic medium (pH= 5) for the initial concentrations from 15 to 75 mg dm^(–3). The
CIP adsorption by CLI follows the Lagergren’s pseudo-second-order kinetics and it can be described well by the Langmuir isotherm
model. For all studied temperatures and initial concentrations more than 85% of the CIP is removed within the first 10 minutes. The
results also indicate that the CIP adsorption mechanism includes two phenomena: 1) electrostatic interactions between negatively
charged aluminosilicate lattice and cationic form of CIP species and 2) ion-exchange reaction.
The use of NTP for the regeneration of CLI-CIP was based on the assumption that NTP generates highly reactive species which can
induce a cleavage of the bonds formed between active sites on the CLI surface and CIP, and also induce the CIP decomposition. The
NTP treatment was performed for a short time, with a low energy consumption, and without using the additional chemicals. All these
make the procedure acceptable not only from economical point of view but also regarding environmental issues [2].
A surface dielectric barrier discharge plasma source was used for the treatment of CLI-CIP. The regeneration study was consisted of five
successive adsorption/NTP cycles. Powder X-ray diffraction and Brunauer–Emmett–Teller surface area analyses confirmed that the
plasma treatment did not influence the CLI lattice nor its textural properties. Moreover, X-ray photoelectron spectroscopy confirmed
that the NTP reduces carbon content in the regenerated CLI for more than 90% and that the plasma reactive species are involved in the
CLI regeneration process.
The obtained results strongly support the applicability of the NTP treatment in regeneration of zeolite-based adsorbents used in
pharmaceutical removal from wastewater.
PB  - Slovenian Zeoilte Association
C3  - Book of abstracts / 9th Conference of the Federation of European Zeolite Associations (FEZA
2023), 2nd-6th of July
T1  - ON THE ADSORPTION OF CIPROFLOXACIN BY CLINOPTILOLITE AND USE OF NON THERMAL ATMOSPHERIC PRESSURE PLASMA FOR REGENERATION OF THE SPENT ZEOLITE
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6573
ER  - 

@conference{
author = "Kalebić, Barbara and Škoro, Nikola and Kovač, Janez and Rajić, Nevenka",
year = "2023",
abstract = "The use of antibiotics constantly increases which has a notable negative impact on water bodies. Ciprofloxacin (CIP) is widely applied
antibiotic in both human and veterinary medicine, as well as in a livestock breeding. Due to its extensive use, CIP has been found in
wastewater effluents in a wide concentration range from ng to mg dm^(–3). An extremely high concentration of up to 50 mg dm^(–3)
has been found near drug manufacturing plants [1]. Since CIP, as well as many other pharmaceuticals, cannot be efficiently removed
from wastewater streams by conventional wastewater treatments, it is of a great importance to find an acceptable method for their
removal.
This study reports the use of natural calcium-rich clinoptilolite (CLI) for the adsorption of CIP and regeneration of the spent adsorbent
(CLI-CIP) by non-thermal atmospheric pressure plasma (NTP). The results show that the CLI possesses a high adsorption efficiency in
removal of CIP at 283, 288 and 293 K in a slightly acidic medium (pH= 5) for the initial concentrations from 15 to 75 mg dm^(–3). The
CIP adsorption by CLI follows the Lagergren’s pseudo-second-order kinetics and it can be described well by the Langmuir isotherm
model. For all studied temperatures and initial concentrations more than 85% of the CIP is removed within the first 10 minutes. The
results also indicate that the CIP adsorption mechanism includes two phenomena: 1) electrostatic interactions between negatively
charged aluminosilicate lattice and cationic form of CIP species and 2) ion-exchange reaction.
The use of NTP for the regeneration of CLI-CIP was based on the assumption that NTP generates highly reactive species which can
induce a cleavage of the bonds formed between active sites on the CLI surface and CIP, and also induce the CIP decomposition. The
NTP treatment was performed for a short time, with a low energy consumption, and without using the additional chemicals. All these
make the procedure acceptable not only from economical point of view but also regarding environmental issues [2].
A surface dielectric barrier discharge plasma source was used for the treatment of CLI-CIP. The regeneration study was consisted of five
successive adsorption/NTP cycles. Powder X-ray diffraction and Brunauer–Emmett–Teller surface area analyses confirmed that the
plasma treatment did not influence the CLI lattice nor its textural properties. Moreover, X-ray photoelectron spectroscopy confirmed
that the NTP reduces carbon content in the regenerated CLI for more than 90% and that the plasma reactive species are involved in the
CLI regeneration process.
The obtained results strongly support the applicability of the NTP treatment in regeneration of zeolite-based adsorbents used in
pharmaceutical removal from wastewater.",
publisher = "Slovenian Zeoilte Association",
journal = "Book of abstracts / 9th Conference of the Federation of European Zeolite Associations (FEZA
2023), 2nd-6th of July",
title = "ON THE ADSORPTION OF CIPROFLOXACIN BY CLINOPTILOLITE AND USE OF NON THERMAL ATMOSPHERIC PRESSURE PLASMA FOR REGENERATION OF THE SPENT ZEOLITE",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6573"
}

Kalebić, B., Škoro, N., Kovač, J.,& Rajić, N.. (2023). ON THE ADSORPTION OF CIPROFLOXACIN BY CLINOPTILOLITE AND USE OF NON THERMAL ATMOSPHERIC PRESSURE PLASMA FOR REGENERATION OF THE SPENT ZEOLITE. in Book of abstracts / 9th Conference of the Federation of European Zeolite Associations (FEZA
2023), 2nd-6th of July
Slovenian Zeoilte Association..
https://hdl.handle.net/21.15107/rcub_technorep_6573

Kalebić B, Škoro N, Kovač J, Rajić N. ON THE ADSORPTION OF CIPROFLOXACIN BY CLINOPTILOLITE AND USE OF NON THERMAL ATMOSPHERIC PRESSURE PLASMA FOR REGENERATION OF THE SPENT ZEOLITE. in Book of abstracts / 9th Conference of the Federation of European Zeolite Associations (FEZA
2023), 2nd-6th of July. 2023;.
https://hdl.handle.net/21.15107/rcub_technorep_6573 .

Kalebić, Barbara, Škoro, Nikola, Kovač, Janez, Rajić, Nevenka, "ON THE ADSORPTION OF CIPROFLOXACIN BY CLINOPTILOLITE AND USE OF NON THERMAL ATMOSPHERIC PRESSURE PLASMA FOR REGENERATION OF THE SPENT ZEOLITE" in Book of abstracts / 9th Conference of the Federation of European Zeolite Associations (FEZA
2023), 2nd-6th of July (2023),
https://hdl.handle.net/21.15107/rcub_technorep_6573 .

TY  - JOUR
AU  - Kalebić, Barbara
AU  - Škoro, Nikola
AU  - Kovač, Janez
AU  - Rajić, Nevenka
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5066
AB  - Natural clinoptilolite (CLI) exhibited a high efficacy in ciprofloxacin (CIP) removal from aqueous solution by adsorption. However, the regeneration of the spent adsorbent was a challenge since the adsorption occurred via electrostatic interactions and ion-exchange reaction. Herein, the feasibility of non-thermal plasma (NTP) was studied for the regeneration of ciprofloxacin-containing clinoptilolite (CIP-CLI) in five successive adsorption/NTP regeneration cycles. The NTP treatments were performed using a surface dielectric barrier discharge (SDBD) operating at atmospheric pressure in air. Plasma discharge gap, sample mass, and electrode surfaces were varied to find optimal regeneration parameters. For the plasma source with an electrode surface of 37.2 cm2, the 2 mm electrode gap and 20 min of plasma treatment were found as optimal parameters (sample mass of 0.2 g). The plasma treatment did not affect clinoptilolite features which were concluded from a study of textural properties and powder X-ray diffraction (PXRD) analysis. X-ray photoelectron spectroscopy (XPS) showed a decrease of total carbon content with around 10% of carbon residual left on the surface. The CLI adsorption capacity can be regenerated to at least 90% of its initial capacity during the five successive cycles, showing the involvement of plasma reactive species in decomposition of adsorbed CIP.
PB  - Elsevier
T2  - Applied Surface Science
T1  - Regeneration of the ciprofloxacin-loaded clinoptilolite by non-thermal atmospheric plasma
SP  - 153379
SP  - 153379
VL  - 593
DO  - doi.org/10.1016/j.apsusc.2022.153379
ER  - 

@article{
author = "Kalebić, Barbara and Škoro, Nikola and Kovač, Janez and Rajić, Nevenka",
year = "2022",
abstract = "Natural clinoptilolite (CLI) exhibited a high efficacy in ciprofloxacin (CIP) removal from aqueous solution by adsorption. However, the regeneration of the spent adsorbent was a challenge since the adsorption occurred via electrostatic interactions and ion-exchange reaction. Herein, the feasibility of non-thermal plasma (NTP) was studied for the regeneration of ciprofloxacin-containing clinoptilolite (CIP-CLI) in five successive adsorption/NTP regeneration cycles. The NTP treatments were performed using a surface dielectric barrier discharge (SDBD) operating at atmospheric pressure in air. Plasma discharge gap, sample mass, and electrode surfaces were varied to find optimal regeneration parameters. For the plasma source with an electrode surface of 37.2 cm2, the 2 mm electrode gap and 20 min of plasma treatment were found as optimal parameters (sample mass of 0.2 g). The plasma treatment did not affect clinoptilolite features which were concluded from a study of textural properties and powder X-ray diffraction (PXRD) analysis. X-ray photoelectron spectroscopy (XPS) showed a decrease of total carbon content with around 10% of carbon residual left on the surface. The CLI adsorption capacity can be regenerated to at least 90% of its initial capacity during the five successive cycles, showing the involvement of plasma reactive species in decomposition of adsorbed CIP.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "Regeneration of the ciprofloxacin-loaded clinoptilolite by non-thermal atmospheric plasma",
pages = "153379-153379",
volume = "593",
doi = "doi.org/10.1016/j.apsusc.2022.153379"
}

Kalebić, B., Škoro, N., Kovač, J.,& Rajić, N.. (2022). Regeneration of the ciprofloxacin-loaded clinoptilolite by non-thermal atmospheric plasma. in Applied Surface Science
Elsevier., 593, 153379.
https://doi.org/doi.org/10.1016/j.apsusc.2022.153379

Kalebić B, Škoro N, Kovač J, Rajić N. Regeneration of the ciprofloxacin-loaded clinoptilolite by non-thermal atmospheric plasma. in Applied Surface Science. 2022;593:153379.
doi:doi.org/10.1016/j.apsusc.2022.153379 .

Kalebić, Barbara, Škoro, Nikola, Kovač, Janez, Rajić, Nevenka, "Regeneration of the ciprofloxacin-loaded clinoptilolite by non-thermal atmospheric plasma" in Applied Surface Science, 593 (2022):153379,
https://doi.org/doi.org/10.1016/j.apsusc.2022.153379 . .

TY  - JOUR
AU  - Kumar, Amit
AU  - Škoro, Nikola
AU  - Gernjak, Wolfgang
AU  - Povrenović, Dragan
AU  - Puač, Nevena
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5081
AB  - In this work, the direct and indirect removal of Acid Blue 25 (AB25) from water by using cold atmospheric pressure plasma jet (APPJ) has been demonstrated. APPJ with a pin electrode type configuration operating with argon as a working gas was used as a plasma source for treatments. In this configuration, argon plasma was formed in the contact with surrounding air over the liquid surface. The plasma was driven by using a high voltage radio frequency (RF) power supply. The system was characterized by the measurement of electrical characteristics and by employing optical emission spectroscopy (OES). The electrical characterization gave information about the voltages and currents, i.e., working points of the discharge, as well as power deposition to the sample. OES recorded the emission spectra and confirmed several existing reactive species in the gas phase of the plasma system. During the direct treatment, AB25-containing solution was directly exposed to APPJ. The direct treatment was performed by modifying various experimental parameters, such as initial AB25 concentrations, treatment times, and input powers. In the indirect treatment, AB25 was treated by using plasma activated water (PAW). The characterization of PAW was performed and various plasma-induced long-lived species, such as nitrate (NO3−), nitrite (NO2−) and hydrogen peroxide (H2O2) have been quantified using colorimetric techniques. Besides, blank experiments have been conducted with main constituents in PAW, where AB25 was treated individually by NO3−, NO2−, and H2O2 and with a mixture of these three species. As expected, with the direct treatment almost complete removal of AB25 was achieved. The measurements also provided an insight into the kinetics of the degradation of AB25. In the indirect treatment, PAW removed a significant amount of AB25 within 17 days. In the blank experiments, H2O2 containing solutions created a favourable influence on removal of AB25 from liquid.
PB  - Frontiers Media S.A.
T2  - Frontiers in Physics
T1  - Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet
SP  - 835635
VL  - 10
DO  - 10.3389/fphy.2022.835635
ER  - 

@article{
author = "Kumar, Amit and Škoro, Nikola and Gernjak, Wolfgang and Povrenović, Dragan and Puač, Nevena",
year = "2022",
abstract = "In this work, the direct and indirect removal of Acid Blue 25 (AB25) from water by using cold atmospheric pressure plasma jet (APPJ) has been demonstrated. APPJ with a pin electrode type configuration operating with argon as a working gas was used as a plasma source for treatments. In this configuration, argon plasma was formed in the contact with surrounding air over the liquid surface. The plasma was driven by using a high voltage radio frequency (RF) power supply. The system was characterized by the measurement of electrical characteristics and by employing optical emission spectroscopy (OES). The electrical characterization gave information about the voltages and currents, i.e., working points of the discharge, as well as power deposition to the sample. OES recorded the emission spectra and confirmed several existing reactive species in the gas phase of the plasma system. During the direct treatment, AB25-containing solution was directly exposed to APPJ. The direct treatment was performed by modifying various experimental parameters, such as initial AB25 concentrations, treatment times, and input powers. In the indirect treatment, AB25 was treated by using plasma activated water (PAW). The characterization of PAW was performed and various plasma-induced long-lived species, such as nitrate (NO3−), nitrite (NO2−) and hydrogen peroxide (H2O2) have been quantified using colorimetric techniques. Besides, blank experiments have been conducted with main constituents in PAW, where AB25 was treated individually by NO3−, NO2−, and H2O2 and with a mixture of these three species. As expected, with the direct treatment almost complete removal of AB25 was achieved. The measurements also provided an insight into the kinetics of the degradation of AB25. In the indirect treatment, PAW removed a significant amount of AB25 within 17 days. In the blank experiments, H2O2 containing solutions created a favourable influence on removal of AB25 from liquid.",
publisher = "Frontiers Media S.A.",
journal = "Frontiers in Physics",
title = "Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet",
pages = "835635",
volume = "10",
doi = "10.3389/fphy.2022.835635"
}

Kumar, A., Škoro, N., Gernjak, W., Povrenović, D.,& Puač, N.. (2022). Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet. in Frontiers in Physics
Frontiers Media S.A.., 10, 835635.
https://doi.org/10.3389/fphy.2022.835635

Kumar A, Škoro N, Gernjak W, Povrenović D, Puač N. Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet. in Frontiers in Physics. 2022;10:835635.
doi:10.3389/fphy.2022.835635 .

Kumar, Amit, Škoro, Nikola, Gernjak, Wolfgang, Povrenović, Dragan, Puač, Nevena, "Direct and Indirect Treatment of Organic Dye (Acid Blue 25) Solutions by Using Cold Atmospheric Plasma Jet" in Frontiers in Physics, 10 (2022):835635,
https://doi.org/10.3389/fphy.2022.835635 . .