TY  - JOUR
AU  - Velić, Natalija
AU  - Stjepanović, Marija
AU  - Pavlović, Stefan
AU  - Bagherifam, Saeed
AU  - Banković, Predrag
AU  - Jović-Jovičić, Nataša
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6901
AB  - Since the synthetic dye Congo red and nitrate are notorious contributors to water pollution
due to their persistent and potentially toxic nature, it is necessary to develop new efficient methods to
remove them from water bodies. Native lignocellulosic materials as biosorbents are mostly inferior,
i.e., the adsorption capacities of native materials are lower. Therefore, attempts have been made to
improve the adsorption capacities of such materials by physical and/or chemical methods, including
the production of biochar. In this study, adsorptive removal was investigated using a novel biosorbent
(mPWS) obtained by modifying poplar (waste) sawdust through quaternisation. The characterisation
of mPWS included SEM/EDX, FTIR, and MIP analysis. The adsorption of CR and nitrate onto mPWS
was studied in a batch system, as a function of contact time (1–240 min), biosorbent concentration
(1–8 g/dm3), and initial adsorbate concentration (25–200 mg/dm3). In all experiments, a high
removal of both adsorbates, from 60 to over 90%, was achieved. Langmuir and Freundlich adsorption
isotherm models were used in order to describe equilibrium adsorption data, while pseudo-first-order
and pseudo-second-order kinetic models, and the intraparticle diffusion model, were used to describe
possible adsorption mechanisms. The Langmuir model fit the adsorption data of CR well, while the
nitrate adsorption process was better interpreted with the Freundlich isotherm model. The kinetics
data for both CR and nitrate agreed with the pseudo-second-order kinetics model, while analysis
using the intraparticle diffusion model indicated two rate-limiting steps during the adsorption
process. Based on the results, it can be concluded that the tested novel biosorbent can be effectively
used for the removal of CR and nitrate from water (with its adsorption capacities being 70.3 mg/g
and 43.6 mg/g, respectively).
PB  - MDPI
T2  - Water
T1  - Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust
VL  - 15
IS  - 21
SP  - 3776
DO  - 10.3390/w15213776
ER  - 

@article{
author = "Velić, Natalija and Stjepanović, Marija and Pavlović, Stefan and Bagherifam, Saeed and Banković, Predrag and Jović-Jovičić, Nataša",
year = "2023",
abstract = "Since the synthetic dye Congo red and nitrate are notorious contributors to water pollution
due to their persistent and potentially toxic nature, it is necessary to develop new efficient methods to
remove them from water bodies. Native lignocellulosic materials as biosorbents are mostly inferior,
i.e., the adsorption capacities of native materials are lower. Therefore, attempts have been made to
improve the adsorption capacities of such materials by physical and/or chemical methods, including
the production of biochar. In this study, adsorptive removal was investigated using a novel biosorbent
(mPWS) obtained by modifying poplar (waste) sawdust through quaternisation. The characterisation
of mPWS included SEM/EDX, FTIR, and MIP analysis. The adsorption of CR and nitrate onto mPWS
was studied in a batch system, as a function of contact time (1–240 min), biosorbent concentration
(1–8 g/dm3), and initial adsorbate concentration (25–200 mg/dm3). In all experiments, a high
removal of both adsorbates, from 60 to over 90%, was achieved. Langmuir and Freundlich adsorption
isotherm models were used in order to describe equilibrium adsorption data, while pseudo-first-order
and pseudo-second-order kinetic models, and the intraparticle diffusion model, were used to describe
possible adsorption mechanisms. The Langmuir model fit the adsorption data of CR well, while the
nitrate adsorption process was better interpreted with the Freundlich isotherm model. The kinetics
data for both CR and nitrate agreed with the pseudo-second-order kinetics model, while analysis
using the intraparticle diffusion model indicated two rate-limiting steps during the adsorption
process. Based on the results, it can be concluded that the tested novel biosorbent can be effectively
used for the removal of CR and nitrate from water (with its adsorption capacities being 70.3 mg/g
and 43.6 mg/g, respectively).",
publisher = "MDPI",
journal = "Water",
title = "Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust",
volume = "15",
number = "21",
pages = "3776",
doi = "10.3390/w15213776"
}

Velić, N., Stjepanović, M., Pavlović, S., Bagherifam, S., Banković, P.,& Jović-Jovičić, N.. (2023). Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust. in Water
MDPI., 15(21), 3776.
https://doi.org/10.3390/w15213776

Velić N, Stjepanović M, Pavlović S, Bagherifam S, Banković P, Jović-Jovičić N. Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust. in Water. 2023;15(21):3776.
doi:10.3390/w15213776 .

Velić, Natalija, Stjepanović, Marija, Pavlović, Stefan, Bagherifam, Saeed, Banković, Predrag, Jović-Jovičić, Nataša, "Modified Lignocellulosic Waste for the Amelioration of Water Quality: Adsorptive Removal of Congo Red and Nitrate Using Modified Poplar Sawdust" in Water, 15, no. 21 (2023):3776,
https://doi.org/10.3390/w15213776 . .

TY  - CONF
AU  - Velić, Natalija
AU  - Stjepanović, Marija
AU  - Ilić, Irena
AU  - Habuda-Stanić, Mirna
AU  - Jović-Jovičić, Nataša
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6930
AB  - In this study, lignocellulose waste materials and smectite clay were modified into adsorbents with surface free ammonium groups. Poplar waste biomass and brewer’s spent grain were chemically modified. Smectite based adsorbents were obtained by intercalation of biopolymer chitosan and hexadecyl trimethylammonium (HDTMA+) cations in smectite structure. The samples were characterized by using X-ray diffraction, elemental analysis and FTIR spectroscopy. The adsorbents were tested for removal of azo dye Congo Red (CR). The concentration of CR was analyzed before and after adsorption test using Thermo Electron Nicolet Evolution 500 UV-VIS spectrophotometer in wavelength range from 250 – 800 nm. It was estimated that adsorption isotherms of CR for all investigated adsorbents showed best fit with Langmuir adsorption model.
PB  - Society of Physical Chemists of Serbia
C3  - Proceedings - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2021, September 20-24 2021, Belgrade, Serbia
T1  - Alkylammonium clay based nanocomposites vs. alkylammonium- modified lignocellulosic materials in adsorption of Congo Red
VL  - 2
SP  - 465
EP  - 467
UR  - https://hdl.handle.net/21.15107/rcub_cer_6930
ER  - 

@conference{
author = "Velić, Natalija and Stjepanović, Marija and Ilić, Irena and Habuda-Stanić, Mirna and Jović-Jovičić, Nataša",
year = "2021",
abstract = "In this study, lignocellulose waste materials and smectite clay were modified into adsorbents with surface free ammonium groups. Poplar waste biomass and brewer’s spent grain were chemically modified. Smectite based adsorbents were obtained by intercalation of biopolymer chitosan and hexadecyl trimethylammonium (HDTMA+) cations in smectite structure. The samples were characterized by using X-ray diffraction, elemental analysis and FTIR spectroscopy. The adsorbents were tested for removal of azo dye Congo Red (CR). The concentration of CR was analyzed before and after adsorption test using Thermo Electron Nicolet Evolution 500 UV-VIS spectrophotometer in wavelength range from 250 – 800 nm. It was estimated that adsorption isotherms of CR for all investigated adsorbents showed best fit with Langmuir adsorption model.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Proceedings - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2021, September 20-24 2021, Belgrade, Serbia",
title = "Alkylammonium clay based nanocomposites vs. alkylammonium- modified lignocellulosic materials in adsorption of Congo Red",
volume = "2",
pages = "465-467",
url = "https://hdl.handle.net/21.15107/rcub_cer_6930"
}

Velić, N., Stjepanović, M., Ilić, I., Habuda-Stanić, M.,& Jović-Jovičić, N.. (2021). Alkylammonium clay based nanocomposites vs. alkylammonium- modified lignocellulosic materials in adsorption of Congo Red. in Proceedings - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2021, September 20-24 2021, Belgrade, Serbia
Society of Physical Chemists of Serbia., 2, 465-467.
https://hdl.handle.net/21.15107/rcub_cer_6930

Velić N, Stjepanović M, Ilić I, Habuda-Stanić M, Jović-Jovičić N. Alkylammonium clay based nanocomposites vs. alkylammonium- modified lignocellulosic materials in adsorption of Congo Red. in Proceedings - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2021, September 20-24 2021, Belgrade, Serbia. 2021;2:465-467.
https://hdl.handle.net/21.15107/rcub_cer_6930 .

Velić, Natalija, Stjepanović, Marija, Ilić, Irena, Habuda-Stanić, Mirna, Jović-Jovičić, Nataša, "Alkylammonium clay based nanocomposites vs. alkylammonium- modified lignocellulosic materials in adsorption of Congo Red" in Proceedings - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Physical Chemistry 2021, September 20-24 2021, Belgrade, Serbia, 2 (2021):465-467,
https://hdl.handle.net/21.15107/rcub_cer_6930 .