TY  - JOUR
AU  - Nikolić, Irena
AU  - Đurović, Dijana
AU  - Tadić, Milena
AU  - Radmilović, Vuk
AU  - Radmilović, Velimir R.
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4356
AB  - Two adsorbents, pristine electric arc furnace slag (EAFS) and alkali activated slag (AAS) were used for Cu2+ removal from aquatic solutions. Batch adsorption tests were conducted at various temperatures and initial Cu2+ concentrations, while solid to liquid ratio and pH of solution were kept constant. Pseudo-first-order and pseudo-second-order (PSO) kinetics models, Langmuir and Freundlich isotherm models, as well as intraparticle and Boyd's diffusion models were applied in order to investigate the adsorption process. It has been found that alkali activation of EAFS leads to an increase in the specific surface of slag and thus improves the sorption properties of EAFS. The adsorption of Cu2+ onto both adsorbents proceeds via PSO adsorption mechanism, film diffusion mainly controls the adsorption process, and Langmuir isotherm model fits well the experimental data. Results indicated a fast adsorption process which is spontaneous and endothermic in nature. Microstructural investigation of EAFS and AAS revealed morphological changes in metal loaded EAFS and AAS samples in comparison to unloaded adsorbents. X-ray powder diffraction analysis indicated that adsorption of Cu2+ onto both adsorbents occurs through formation of a Cu-complex.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Chemical Engineering Communications
T1  - Adsorption kinetics, equilibrium, and thermodynamics of Cu2+ on pristine and alkali activated steel slag
EP  - 1297
IS  - 9
SP  - 1278
VL  - 207
DO  - 10.1080/00986445.2019.1685986
ER  - 

@article{
author = "Nikolić, Irena and Đurović, Dijana and Tadić, Milena and Radmilović, Vuk and Radmilović, Velimir R.",
year = "2020",
abstract = "Two adsorbents, pristine electric arc furnace slag (EAFS) and alkali activated slag (AAS) were used for Cu2+ removal from aquatic solutions. Batch adsorption tests were conducted at various temperatures and initial Cu2+ concentrations, while solid to liquid ratio and pH of solution were kept constant. Pseudo-first-order and pseudo-second-order (PSO) kinetics models, Langmuir and Freundlich isotherm models, as well as intraparticle and Boyd's diffusion models were applied in order to investigate the adsorption process. It has been found that alkali activation of EAFS leads to an increase in the specific surface of slag and thus improves the sorption properties of EAFS. The adsorption of Cu2+ onto both adsorbents proceeds via PSO adsorption mechanism, film diffusion mainly controls the adsorption process, and Langmuir isotherm model fits well the experimental data. Results indicated a fast adsorption process which is spontaneous and endothermic in nature. Microstructural investigation of EAFS and AAS revealed morphological changes in metal loaded EAFS and AAS samples in comparison to unloaded adsorbents. X-ray powder diffraction analysis indicated that adsorption of Cu2+ onto both adsorbents occurs through formation of a Cu-complex.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Chemical Engineering Communications",
title = "Adsorption kinetics, equilibrium, and thermodynamics of Cu2+ on pristine and alkali activated steel slag",
pages = "1297-1278",
number = "9",
volume = "207",
doi = "10.1080/00986445.2019.1685986"
}

Nikolić, I., Đurović, D., Tadić, M., Radmilović, V.,& Radmilović, V. R.. (2020). Adsorption kinetics, equilibrium, and thermodynamics of Cu2+ on pristine and alkali activated steel slag. in Chemical Engineering Communications
Taylor & Francis Inc, Philadelphia., 207(9), 1278-1297.
https://doi.org/10.1080/00986445.2019.1685986

Nikolić I, Đurović D, Tadić M, Radmilović V, Radmilović VR. Adsorption kinetics, equilibrium, and thermodynamics of Cu2+ on pristine and alkali activated steel slag. in Chemical Engineering Communications. 2020;207(9):1278-1297.
doi:10.1080/00986445.2019.1685986 .

Nikolić, Irena, Đurović, Dijana, Tadić, Milena, Radmilović, Vuk, Radmilović, Velimir R., "Adsorption kinetics, equilibrium, and thermodynamics of Cu2+ on pristine and alkali activated steel slag" in Chemical Engineering Communications, 207, no. 9 (2020):1278-1297,
https://doi.org/10.1080/00986445.2019.1685986 . .

TY  - JOUR
AU  - Nikolić, Irena
AU  - Tadić, Milena
AU  - Janković-Častvan, Ivona
AU  - Radmilović, Vuk
AU  - Radmilović, Velimir R.
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3939
AB  - The durability of alkali-activated steel electric arc furnace slag (EAFS) in a marine environment was evaluated with respect to the chemical composition of the alkaline activator. Two different alkaline activators have been used: a mixture of NaOH and Na2SiO3 solutions (Na-activator), as well as a mixture of KOH and K2SiO3 solutions (K-activator). The obtained results gave the insight into the influence of alkaline activator chemistry on the compressive strength and durability of alkali-activated slag (AAS), which was exposed to the damaging seawater environment. The porosity of AAS was found to be the most important factor with regards to the strength and durability of these materials in marine environment. Sodium based alkali-activated slag (Na-AAS) displayed lower porosity and higher compressive strength compared to potassium based AAS (K-AAS). Lower porosity and thus a lower rate of water uptake by AAS matrix, i.e., the lower sorptivity was exhibited by the Na-AAS when compared to K-AAS. Hence, Na-AAS exhibited better durability in a marine environment.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Durability of alkali activated slag in a marine environment: Influence of alkali ion
EP  - 1156
IS  - 10
SP  - 1143
VL  - 83
DO  - 10.2298/JSC180328057N
ER  - 

@article{
author = "Nikolić, Irena and Tadić, Milena and Janković-Častvan, Ivona and Radmilović, Vuk and Radmilović, Velimir R.",
year = "2018",
abstract = "The durability of alkali-activated steel electric arc furnace slag (EAFS) in a marine environment was evaluated with respect to the chemical composition of the alkaline activator. Two different alkaline activators have been used: a mixture of NaOH and Na2SiO3 solutions (Na-activator), as well as a mixture of KOH and K2SiO3 solutions (K-activator). The obtained results gave the insight into the influence of alkaline activator chemistry on the compressive strength and durability of alkali-activated slag (AAS), which was exposed to the damaging seawater environment. The porosity of AAS was found to be the most important factor with regards to the strength and durability of these materials in marine environment. Sodium based alkali-activated slag (Na-AAS) displayed lower porosity and higher compressive strength compared to potassium based AAS (K-AAS). Lower porosity and thus a lower rate of water uptake by AAS matrix, i.e., the lower sorptivity was exhibited by the Na-AAS when compared to K-AAS. Hence, Na-AAS exhibited better durability in a marine environment.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Durability of alkali activated slag in a marine environment: Influence of alkali ion",
pages = "1156-1143",
number = "10",
volume = "83",
doi = "10.2298/JSC180328057N"
}

Nikolić, I., Tadić, M., Janković-Častvan, I., Radmilović, V.,& Radmilović, V. R.. (2018). Durability of alkali activated slag in a marine environment: Influence of alkali ion. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 83(10), 1143-1156.
https://doi.org/10.2298/JSC180328057N

Nikolić I, Tadić M, Janković-Častvan I, Radmilović V, Radmilović VR. Durability of alkali activated slag in a marine environment: Influence of alkali ion. in Journal of the Serbian Chemical Society. 2018;83(10):1143-1156.
doi:10.2298/JSC180328057N .

Nikolić, Irena, Tadić, Milena, Janković-Častvan, Ivona, Radmilović, Vuk, Radmilović, Velimir R., "Durability of alkali activated slag in a marine environment: Influence of alkali ion" in Journal of the Serbian Chemical Society, 83, no. 10 (2018):1143-1156,
https://doi.org/10.2298/JSC180328057N . .