TY  - CONF
AU  - Suručić, Ljiljana
AU  - Sandić, Zvjezdana
AU  - Stanković, Aljoša
AU  - Janjić, Goran
AU  - Tadić, Tamara
AU  - Marković, Bojana
AU  - Onjia, Antonije
AU  - Nastasović, Aleksandra
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7045
AB  - The contamination of water with chromium is a global issue that is especially
severe in developing countries with intensive mining and heavy industry (South
Africa, Pakistan, and India) [1,2]. Trivalent Cr(III) and hexavalent Cr(VI) are the
most common forms found in effluent water. Whereas trivalent chromium is a
micronutrient (25–35 g/day) involved in the metabolism of lipids and carbohydrates
[3,4], hexavalent chromium is exceedingly toxic, teratogenic, and mutagenic.
Particularly concerning are its high solubility in water, mobility in detritus, and
potential for bioaccumulation in living tissues. Due to these factors, hexavalent
chromium has been the subject of numerous studies, especially its removal from
effluent [5,6]. These studies have demonstrated that sorption is a highly effective and
relatively simple technique for chromium removal from wastewater. In terms of this,
magnetic heavy metals nanosorbents derived from inorganic compounds and
polymers [7-9] are incredibly intriguing, because they could have been readily
extracted from the mixture using an external magnetic field. The sorption
investigation of hexavalent chromium in aqueous solutions on the magnetic aminofunctionalized polymer nanocomposite based on glycidyl methacrylate, m-PGMA
revealed its highly selectivity and efficiency. [10,11]. The binding mechanism of hexavalent chromium ions onto m-PGMA was investigated using kinetic,
equilibrium, and thermodynamic experiments as well as molecular modeling
techniques (theoretical quantum-chemical calculations) [12-15]. It was observed that
the process occurs in two phases. In the first phase, electrostatic interactions attract
hexavalent chromium ions to the surface of the sorbent via the active sites (amino
and APTMS groups). Cr(VI) is then converted to Cr(III) ions, which can coordinate
with amino or hydroxyl groups on the surface of the sorbent [16]. The trivalent
chromium ions that persist in the solution or on the surface of the sorbent are less
hazardous than the initial hexavalent form. The application of m-PGMA sorbent
enables the transformation of the toxic form of chromium into a less hazardous form,
which is significant due to the possibility of sorbent regeneration and the subsequent
processing of the solution following sorption.
PB  - Banja Luka : University PIM
C3  - The Book of Abstracts / XII International Conference on Social and Technological Development – STED 2023, Trebinje, June, 15-18, 2023
T1  - Reductive removal of hexavalent chromium in aqueous solution by magnetic amino-functionalized polymer nanocomposite
EP  - 120
SP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7045
ER  - 

@conference{
author = "Suručić, Ljiljana and Sandić, Zvjezdana and Stanković, Aljoša and Janjić, Goran and Tadić, Tamara and Marković, Bojana and Onjia, Antonije and Nastasović, Aleksandra",
year = "2023",
abstract = "The contamination of water with chromium is a global issue that is especially
severe in developing countries with intensive mining and heavy industry (South
Africa, Pakistan, and India) [1,2]. Trivalent Cr(III) and hexavalent Cr(VI) are the
most common forms found in effluent water. Whereas trivalent chromium is a
micronutrient (25–35 g/day) involved in the metabolism of lipids and carbohydrates
[3,4], hexavalent chromium is exceedingly toxic, teratogenic, and mutagenic.
Particularly concerning are its high solubility in water, mobility in detritus, and
potential for bioaccumulation in living tissues. Due to these factors, hexavalent
chromium has been the subject of numerous studies, especially its removal from
effluent [5,6]. These studies have demonstrated that sorption is a highly effective and
relatively simple technique for chromium removal from wastewater. In terms of this,
magnetic heavy metals nanosorbents derived from inorganic compounds and
polymers [7-9] are incredibly intriguing, because they could have been readily
extracted from the mixture using an external magnetic field. The sorption
investigation of hexavalent chromium in aqueous solutions on the magnetic aminofunctionalized polymer nanocomposite based on glycidyl methacrylate, m-PGMA
revealed its highly selectivity and efficiency. [10,11]. The binding mechanism of hexavalent chromium ions onto m-PGMA was investigated using kinetic,
equilibrium, and thermodynamic experiments as well as molecular modeling
techniques (theoretical quantum-chemical calculations) [12-15]. It was observed that
the process occurs in two phases. In the first phase, electrostatic interactions attract
hexavalent chromium ions to the surface of the sorbent via the active sites (amino
and APTMS groups). Cr(VI) is then converted to Cr(III) ions, which can coordinate
with amino or hydroxyl groups on the surface of the sorbent [16]. The trivalent
chromium ions that persist in the solution or on the surface of the sorbent are less
hazardous than the initial hexavalent form. The application of m-PGMA sorbent
enables the transformation of the toxic form of chromium into a less hazardous form,
which is significant due to the possibility of sorbent regeneration and the subsequent
processing of the solution following sorption.",
publisher = "Banja Luka : University PIM",
journal = "The Book of Abstracts / XII International Conference on Social and Technological Development – STED 2023, Trebinje, June, 15-18, 2023",
title = "Reductive removal of hexavalent chromium in aqueous solution by magnetic amino-functionalized polymer nanocomposite",
pages = "120-118",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7045"
}

Suručić, L., Sandić, Z., Stanković, A., Janjić, G., Tadić, T., Marković, B., Onjia, A.,& Nastasović, A.. (2023). Reductive removal of hexavalent chromium in aqueous solution by magnetic amino-functionalized polymer nanocomposite. in The Book of Abstracts / XII International Conference on Social and Technological Development – STED 2023, Trebinje, June, 15-18, 2023
Banja Luka : University PIM., 118-120.
https://hdl.handle.net/21.15107/rcub_technorep_7045

Suručić L, Sandić Z, Stanković A, Janjić G, Tadić T, Marković B, Onjia A, Nastasović A. Reductive removal of hexavalent chromium in aqueous solution by magnetic amino-functionalized polymer nanocomposite. in The Book of Abstracts / XII International Conference on Social and Technological Development – STED 2023, Trebinje, June, 15-18, 2023. 2023;:118-120.
https://hdl.handle.net/21.15107/rcub_technorep_7045 .

Suručić, Ljiljana, Sandić, Zvjezdana, Stanković, Aljoša, Janjić, Goran, Tadić, Tamara, Marković, Bojana, Onjia, Antonije, Nastasović, Aleksandra, "Reductive removal of hexavalent chromium in aqueous solution by magnetic amino-functionalized polymer nanocomposite" in The Book of Abstracts / XII International Conference on Social and Technological Development – STED 2023, Trebinje, June, 15-18, 2023 (2023):118-120,
https://hdl.handle.net/21.15107/rcub_technorep_7045 .

TY  - CONF
AU  - Tadić, Tamara
AU  - Sandić, Zvjezdana
AU  - Bulatović, Sandra
AU  - Marković, Bojana
AU  - Nastasović, Aleksandra
AU  - Onjia, Antonije
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7049
AB  - Silver as one of the most known precious metal is used on a large scale in various industrial
branches and the release of silver ions from such industrial activities potentially can cause
serious environmental problems. Therefore, the removal of this metal from wastewater is a great
challenge, and it is crucial for the quality improvement of the environment. Porous polymer
materials with high specific surface areas and other specific physical and chemical
characteristics have gained much attention as sorbents in the field of environmental protection.
In this paper, macroporous poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate)
copolymer synthesized by suspension copolymerization and functionalized with
diethylenetriamine was employed for silver ions sorption from aqueous solution at unadjucted
pH and room temperature. The sorption kinetics and isotherms were studied to establish the
mechanisms of sorption process. The kinetic data were modeled with pseudo-first-order (PFO),
pseudo-second-order (PSO), Elovich and fractional power (FP) models as well as intraparticle
diffusion (IPD) and liquid diffusion model (LFD), while the equilibrium data were analized
using Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models. Eight error functions
such as coefficient of determination (R2
), Marquardt’s percent standard deviation (MPSD), Chisquare statistic test (χ2
), hybrid fractional error function (HYBRID), the root mean square error
(RMSE), the sum of the errors squared (SSE), sum of the absolute errors (SAE), and average
relative error (ARE) were used to estimate the error deviations between theoretically predicted
and experimental values of sorption capacities. The best kinetic and isotherm models were
determined by normalizing eight error functions and finding the sum of normalized error value
(SNE). The sorption kinetic studies revealed that the sorption of silver by macroporous aminofunctionalized sorbent obeys the PSO kinetic model. In addition, the results indicate that
sorption was governed by intraparticle diffusion with the evident influence of liquid film
diffusion. The obtained results showed that the sorption isotherm data were satisfactorily fitted
to the Redlich-Peterson isotherm model.
PB  - Zvornik : Faculty of Technology
C3  - Book of Abstracts / VIII International Congress "Engineering, Environment and Materials in Process Industry", Jahorina, March 20-23, 2023
T1  - Kinetics and isotherms modeling of silver removal onto macroporous amino sorbent
SP  - 125
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7049
ER  - 

@conference{
author = "Tadić, Tamara and Sandić, Zvjezdana and Bulatović, Sandra and Marković, Bojana and Nastasović, Aleksandra and Onjia, Antonije",
year = "2023",
abstract = "Silver as one of the most known precious metal is used on a large scale in various industrial
branches and the release of silver ions from such industrial activities potentially can cause
serious environmental problems. Therefore, the removal of this metal from wastewater is a great
challenge, and it is crucial for the quality improvement of the environment. Porous polymer
materials with high specific surface areas and other specific physical and chemical
characteristics have gained much attention as sorbents in the field of environmental protection.
In this paper, macroporous poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate)
copolymer synthesized by suspension copolymerization and functionalized with
diethylenetriamine was employed for silver ions sorption from aqueous solution at unadjucted
pH and room temperature. The sorption kinetics and isotherms were studied to establish the
mechanisms of sorption process. The kinetic data were modeled with pseudo-first-order (PFO),
pseudo-second-order (PSO), Elovich and fractional power (FP) models as well as intraparticle
diffusion (IPD) and liquid diffusion model (LFD), while the equilibrium data were analized
using Langmuir, Freundlich, Sips and Redlich-Peterson isotherm models. Eight error functions
such as coefficient of determination (R2
), Marquardt’s percent standard deviation (MPSD), Chisquare statistic test (χ2
), hybrid fractional error function (HYBRID), the root mean square error
(RMSE), the sum of the errors squared (SSE), sum of the absolute errors (SAE), and average
relative error (ARE) were used to estimate the error deviations between theoretically predicted
and experimental values of sorption capacities. The best kinetic and isotherm models were
determined by normalizing eight error functions and finding the sum of normalized error value
(SNE). The sorption kinetic studies revealed that the sorption of silver by macroporous aminofunctionalized sorbent obeys the PSO kinetic model. In addition, the results indicate that
sorption was governed by intraparticle diffusion with the evident influence of liquid film
diffusion. The obtained results showed that the sorption isotherm data were satisfactorily fitted
to the Redlich-Peterson isotherm model.",
publisher = "Zvornik : Faculty of Technology",
journal = "Book of Abstracts / VIII International Congress "Engineering, Environment and Materials in Process Industry", Jahorina, March 20-23, 2023",
title = "Kinetics and isotherms modeling of silver removal onto macroporous amino sorbent",
pages = "125",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7049"
}

Tadić, T., Sandić, Z., Bulatović, S., Marković, B., Nastasović, A.,& Onjia, A.. (2023). Kinetics and isotherms modeling of silver removal onto macroporous amino sorbent. in Book of Abstracts / VIII International Congress "Engineering, Environment and Materials in Process Industry", Jahorina, March 20-23, 2023
Zvornik : Faculty of Technology., 125.
https://hdl.handle.net/21.15107/rcub_technorep_7049

Tadić T, Sandić Z, Bulatović S, Marković B, Nastasović A, Onjia A. Kinetics and isotherms modeling of silver removal onto macroporous amino sorbent. in Book of Abstracts / VIII International Congress "Engineering, Environment and Materials in Process Industry", Jahorina, March 20-23, 2023. 2023;:125.
https://hdl.handle.net/21.15107/rcub_technorep_7049 .

Tadić, Tamara, Sandić, Zvjezdana, Bulatović, Sandra, Marković, Bojana, Nastasović, Aleksandra, Onjia, Antonije, "Kinetics and isotherms modeling of silver removal onto macroporous amino sorbent" in Book of Abstracts / VIII International Congress "Engineering, Environment and Materials in Process Industry", Jahorina, March 20-23, 2023 (2023):125,
https://hdl.handle.net/21.15107/rcub_technorep_7049 .