In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasi...ng its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.
Keywords:
thermodynamic / point of zero charge / natural zeolite / lead removal / Fe(III)-modified zeolite / encapsulation by alginate
Source:
12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018), 2019, 32, 286-293
TY - CONF
AU - Kragović, Milan
AU - Stojmenović, Marija
AU - Petrović, Jelena
AU - Loredo, Jorge
AU - Pasalić, Snežana
AU - Nedeljković, Andrijana
AU - Ristović, Ivica
PY - 2019
UR - https://ritnms.itnms.ac.rs/handle/123456789/497
AB - In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.
PB - Elsevier Science Bv, Amsterdam
C3 - 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
T1 - Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite
EP - 293
SP - 286
VL - 32
DO - 10.1016/j.promfg.2019.02.216
UR - conv_854
ER -
@conference{
author = "Kragović, Milan and Stojmenović, Marija and Petrović, Jelena and Loredo, Jorge and Pasalić, Snežana and Nedeljković, Andrijana and Ristović, Ivica",
year = "2019",
abstract = "In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)",
title = "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite",
pages = "293-286",
volume = "32",
doi = "10.1016/j.promfg.2019.02.216",
url = "conv_854"
}
Kragović, M., Stojmenović, M., Petrović, J., Loredo, J., Pasalić, S., Nedeljković, A.,& Ristović, I.. (2019). Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
Elsevier Science Bv, Amsterdam., 32, 286-293.
https://doi.org/10.1016/j.promfg.2019.02.216
conv_854
Kragović M, Stojmenović M, Petrović J, Loredo J, Pasalić S, Nedeljković A, Ristović I. Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018). 2019;32:286-293.
doi:10.1016/j.promfg.2019.02.216
conv_854 .
Kragović, Milan, Stojmenović, Marija, Petrović, Jelena, Loredo, Jorge, Pasalić, Snežana, Nedeljković, Andrijana, Ristović, Ivica, "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite" in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018), 32 (2019):286-293,
https://doi.org/10.1016/j.promfg.2019.02.216 .,
conv_854 .
