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 . .