TY  - JOUR
AU  - Tomić, Zorica
AU  - Kaludjerović, Lazar
AU  - Nikolić, Nataša
AU  - Marković, Smilja
AU  - Makreski, Petre
PY  - 2016
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4117
AB  - Results presented in this paper are pioneering attempt toward better understanding of the thermal stability of acetochlor sorption in inorganic and organic montmorillonites. Changes in surface properties of acetochlor adsorbed on montmorillonites and montmorillonites modified with hexadecyltrimethylammonium bromide have been investigated by thermogravimetry, derivative thermogravimetry and infrared spectroscopy. The mass loss, as a result of the heating treatment, indicates release of free water, transformation of hydrophilic to hydrophobic surface, the release of acetochlor sorbed on the montmorillonite, the release of acetochlor sorbed on the montmorillonite and dehydroxylation of the structural OH units.
PB  - Springer, Dordrecht
T2  - Journal of Thermal Analysis and Calorimetry
T1  - Thermal investigation of acetochlor adsorption on inorganic- and organic-modified montmorillonite
EP  - 2319
IS  - 3
SP  - 2313
VL  - 123
DO  - 10.1007/s10973-015-5102-2
ER  - 

@article{
author = "Tomić, Zorica and Kaludjerović, Lazar and Nikolić, Nataša and Marković, Smilja and Makreski, Petre",
year = "2016",
abstract = "Results presented in this paper are pioneering attempt toward better understanding of the thermal stability of acetochlor sorption in inorganic and organic montmorillonites. Changes in surface properties of acetochlor adsorbed on montmorillonites and montmorillonites modified with hexadecyltrimethylammonium bromide have been investigated by thermogravimetry, derivative thermogravimetry and infrared spectroscopy. The mass loss, as a result of the heating treatment, indicates release of free water, transformation of hydrophilic to hydrophobic surface, the release of acetochlor sorbed on the montmorillonite, the release of acetochlor sorbed on the montmorillonite and dehydroxylation of the structural OH units.",
publisher = "Springer, Dordrecht",
journal = "Journal of Thermal Analysis and Calorimetry",
title = "Thermal investigation of acetochlor adsorption on inorganic- and organic-modified montmorillonite",
pages = "2319-2313",
number = "3",
volume = "123",
doi = "10.1007/s10973-015-5102-2"
}

Tomić, Z., Kaludjerović, L., Nikolić, N., Marković, S.,& Makreski, P.. (2016). Thermal investigation of acetochlor adsorption on inorganic- and organic-modified montmorillonite. in Journal of Thermal Analysis and Calorimetry
Springer, Dordrecht., 123(3), 2313-2319.
https://doi.org/10.1007/s10973-015-5102-2

Tomić Z, Kaludjerović L, Nikolić N, Marković S, Makreski P. Thermal investigation of acetochlor adsorption on inorganic- and organic-modified montmorillonite. in Journal of Thermal Analysis and Calorimetry. 2016;123(3):2313-2319.
doi:10.1007/s10973-015-5102-2 .

Tomić, Zorica, Kaludjerović, Lazar, Nikolić, Nataša, Marković, Smilja, Makreski, Petre, "Thermal investigation of acetochlor adsorption on inorganic- and organic-modified montmorillonite" in Journal of Thermal Analysis and Calorimetry, 123, no. 3 (2016):2313-2319,
https://doi.org/10.1007/s10973-015-5102-2 . .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Ašanin, Darko P.
AU  - Durović-Pejcev, Rada D.
AU  - Djordjević, Aleksandar
AU  - Makreski, Petre
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3832
AB  - The results of sorption of acetochlor herbicide with different concentrations (1-15 mu g/mL) in inorganic- and organic-modified bentonite are presented. Acetochlor sorption in both bentonite types was studied by attenuated total reflectance spectroscopy in the mid-infrared region and by batch equilibrium method. Infrared spectroscopy results suggest that the interaction of acetochlor with inorganic (or organic) bentonite takes place by mechanism involving the carbonyl stretching vibration and phenyl ring in the acetochlor molecule. The increase of the acetochlor concentration results in red shift of both corresponding band wavenumbers. Batch adsorption study pointed out more expressed sorption of acetochlor in organic bentonite.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Spectroscopy Letters
T1  - Adsorption of Acetochlor Herbicide on Inorganic- and Organic-Modified Bentonite Monitored by Mid-Infrared Spectroscopy and Batch Adsorption
EP  - 690
IS  - 9
SP  - 685
VL  - 48
DO  - 10.1080/00387010.2014.962705
ER  - 

@article{
author = "Tomić, Zorica and Ašanin, Darko P. and Durović-Pejcev, Rada D. and Djordjević, Aleksandar and Makreski, Petre",
year = "2015",
abstract = "The results of sorption of acetochlor herbicide with different concentrations (1-15 mu g/mL) in inorganic- and organic-modified bentonite are presented. Acetochlor sorption in both bentonite types was studied by attenuated total reflectance spectroscopy in the mid-infrared region and by batch equilibrium method. Infrared spectroscopy results suggest that the interaction of acetochlor with inorganic (or organic) bentonite takes place by mechanism involving the carbonyl stretching vibration and phenyl ring in the acetochlor molecule. The increase of the acetochlor concentration results in red shift of both corresponding band wavenumbers. Batch adsorption study pointed out more expressed sorption of acetochlor in organic bentonite.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Spectroscopy Letters",
title = "Adsorption of Acetochlor Herbicide on Inorganic- and Organic-Modified Bentonite Monitored by Mid-Infrared Spectroscopy and Batch Adsorption",
pages = "690-685",
number = "9",
volume = "48",
doi = "10.1080/00387010.2014.962705"
}

Tomić, Z., Ašanin, D. P., Durović-Pejcev, R. D., Djordjević, A.,& Makreski, P.. (2015). Adsorption of Acetochlor Herbicide on Inorganic- and Organic-Modified Bentonite Monitored by Mid-Infrared Spectroscopy and Batch Adsorption. in Spectroscopy Letters
Taylor & Francis Inc, Philadelphia., 48(9), 685-690.
https://doi.org/10.1080/00387010.2014.962705

Tomić Z, Ašanin DP, Durović-Pejcev RD, Djordjević A, Makreski P. Adsorption of Acetochlor Herbicide on Inorganic- and Organic-Modified Bentonite Monitored by Mid-Infrared Spectroscopy and Batch Adsorption. in Spectroscopy Letters. 2015;48(9):685-690.
doi:10.1080/00387010.2014.962705 .

Tomić, Zorica, Ašanin, Darko P., Durović-Pejcev, Rada D., Djordjević, Aleksandar, Makreski, Petre, "Adsorption of Acetochlor Herbicide on Inorganic- and Organic-Modified Bentonite Monitored by Mid-Infrared Spectroscopy and Batch Adsorption" in Spectroscopy Letters, 48, no. 9 (2015):685-690,
https://doi.org/10.1080/00387010.2014.962705 . .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Ašanin, Darko P.
AU  - Durović, Rada
AU  - Djordjević, Aleksandar
AU  - Makreski, Petre
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2973
AB  - NIR spectroscopy is used to determine acetochlor herbicide adsorption on Na-montmorillonite (NaP) and organically modified montmorillonite (NaOM). Both montmorillonites NIR spectra shows bands at 7061 and 6791 cm(-1). Organo-montmorillonite is characterised by two emphasized bands at 5871 and 5667 cm(-1) that are attributed to the fundamental overtones of the mid-IR bands at 2916 and 2850 cm(-1). Bands at 6017 and 6013 cm(-1) are attributed to acetochlor adsorbed to organo-montmorillonite and Na-montmorillonite, which is confirmed by X-ray powder diffraction (XRPD). Greater quantity of acetochlor is adsorbed to organo-clays compared to non-modified montmorillonite. Acetochlor poses high risk to environmental contamination. Organo-clays are the most useful for removing acetochlor from water and soil.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
T1  - Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites
EP  - 52
SP  - 47
VL  - 98
DO  - 10.1016/j.saa.2012.08.035
ER  - 

@article{
author = "Tomić, Zorica and Ašanin, Darko P. and Durović, Rada and Djordjević, Aleksandar and Makreski, Petre",
year = "2012",
abstract = "NIR spectroscopy is used to determine acetochlor herbicide adsorption on Na-montmorillonite (NaP) and organically modified montmorillonite (NaOM). Both montmorillonites NIR spectra shows bands at 7061 and 6791 cm(-1). Organo-montmorillonite is characterised by two emphasized bands at 5871 and 5667 cm(-1) that are attributed to the fundamental overtones of the mid-IR bands at 2916 and 2850 cm(-1). Bands at 6017 and 6013 cm(-1) are attributed to acetochlor adsorbed to organo-montmorillonite and Na-montmorillonite, which is confirmed by X-ray powder diffraction (XRPD). Greater quantity of acetochlor is adsorbed to organo-clays compared to non-modified montmorillonite. Acetochlor poses high risk to environmental contamination. Organo-clays are the most useful for removing acetochlor from water and soil.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy",
title = "Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites",
pages = "52-47",
volume = "98",
doi = "10.1016/j.saa.2012.08.035"
}

Tomić, Z., Ašanin, D. P., Durović, R., Djordjević, A.,& Makreski, P.. (2012). Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites. in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
Pergamon-Elsevier Science Ltd, Oxford., 98, 47-52.
https://doi.org/10.1016/j.saa.2012.08.035

Tomić Z, Ašanin DP, Durović R, Djordjević A, Makreski P. Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites. in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy. 2012;98:47-52.
doi:10.1016/j.saa.2012.08.035 .

Tomić, Zorica, Ašanin, Darko P., Durović, Rada, Djordjević, Aleksandar, Makreski, Petre, "Near-infrared spectroscopy study for determination of adsorbed acetochlor in the organic and inorganic bentonites" in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 98 (2012):47-52,
https://doi.org/10.1016/j.saa.2012.08.035 . .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Ašanin, Darko P.
AU  - Antić-Mladenović, Svetlana
AU  - Poharc-Logar, Vesna
AU  - Makreski, Petre
PY  - 2012
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3028
AB  - Near-infrared (NIR) and mid-infrared (MIR) spectroscopy are irreplaceable methods for characterization of bentonites. The paper presents work on bentonites modified with inorganic Na+ and organic HDTMA(+) (hexaclecyltrimethylammonium) cations and treated by 1.5, 3, 4.5 and 6M H2SO4. The characterization was based on the assignment of the stretching (nu) and bending (delta) vibrations observed in the MIR region and the first overtone [2 nu(R-H)] and combination [nu(R-H)+delta(R-H)] modes of R-H groups (R=O, C) in the NIR region. NIR spectrum shows the characteristic OH and CH bonds for organomontmorillonite. The effect of larger alkylammonium cations on the vibrations of Si-O and OH bonds in montmorillonite layers is observed. A few key-bands in the NIR region show the change of water in the interlayer montmorillonite. The intensities of the overtone (7080 and 6840cm(-1)) and combination (5242cm(-1)) bands of H2O have considerably decreased as a result of hydrophobic character of the NaOM. Spectra of acid-treated samples show a gradual decrease in the intensities of the OH overtone (near 7100-7000cm(-1)) and combination bands (4600-4300cm(-1)) reflecting a fewer number of octahedral atoms. This paper also points out that ATR technique and the 2nd derivative spectrum enables much precise band assignment.
PB  - Elsevier, Amsterdam
T2  - Vibrational Spectroscopy
T1  - NIR and MIR spectroscopic characteristics of hydrophilic and hydrophobic bentonite treated with sulphuric acid
EP  - 103
SP  - 95
VL  - 58
DO  - 10.1016/j.vibspec.2011.11.002
ER  - 

@article{
author = "Tomić, Zorica and Ašanin, Darko P. and Antić-Mladenović, Svetlana and Poharc-Logar, Vesna and Makreski, Petre",
year = "2012",
abstract = "Near-infrared (NIR) and mid-infrared (MIR) spectroscopy are irreplaceable methods for characterization of bentonites. The paper presents work on bentonites modified with inorganic Na+ and organic HDTMA(+) (hexaclecyltrimethylammonium) cations and treated by 1.5, 3, 4.5 and 6M H2SO4. The characterization was based on the assignment of the stretching (nu) and bending (delta) vibrations observed in the MIR region and the first overtone [2 nu(R-H)] and combination [nu(R-H)+delta(R-H)] modes of R-H groups (R=O, C) in the NIR region. NIR spectrum shows the characteristic OH and CH bonds for organomontmorillonite. The effect of larger alkylammonium cations on the vibrations of Si-O and OH bonds in montmorillonite layers is observed. A few key-bands in the NIR region show the change of water in the interlayer montmorillonite. The intensities of the overtone (7080 and 6840cm(-1)) and combination (5242cm(-1)) bands of H2O have considerably decreased as a result of hydrophobic character of the NaOM. Spectra of acid-treated samples show a gradual decrease in the intensities of the OH overtone (near 7100-7000cm(-1)) and combination bands (4600-4300cm(-1)) reflecting a fewer number of octahedral atoms. This paper also points out that ATR technique and the 2nd derivative spectrum enables much precise band assignment.",
publisher = "Elsevier, Amsterdam",
journal = "Vibrational Spectroscopy",
title = "NIR and MIR spectroscopic characteristics of hydrophilic and hydrophobic bentonite treated with sulphuric acid",
pages = "103-95",
volume = "58",
doi = "10.1016/j.vibspec.2011.11.002"
}

Tomić, Z., Ašanin, D. P., Antić-Mladenović, S., Poharc-Logar, V.,& Makreski, P.. (2012). NIR and MIR spectroscopic characteristics of hydrophilic and hydrophobic bentonite treated with sulphuric acid. in Vibrational Spectroscopy
Elsevier, Amsterdam., 58, 95-103.
https://doi.org/10.1016/j.vibspec.2011.11.002

Tomić Z, Ašanin DP, Antić-Mladenović S, Poharc-Logar V, Makreski P. NIR and MIR spectroscopic characteristics of hydrophilic and hydrophobic bentonite treated with sulphuric acid. in Vibrational Spectroscopy. 2012;58:95-103.
doi:10.1016/j.vibspec.2011.11.002 .

Tomić, Zorica, Ašanin, Darko P., Antić-Mladenović, Svetlana, Poharc-Logar, Vesna, Makreski, Petre, "NIR and MIR spectroscopic characteristics of hydrophilic and hydrophobic bentonite treated with sulphuric acid" in Vibrational Spectroscopy, 58 (2012):95-103,
https://doi.org/10.1016/j.vibspec.2011.11.002 . .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Logar, Vesna P.
AU  - Babić, Biljana M.
AU  - Rogan, Jelena R.
AU  - Makreski, Petre
PY  - 2011
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2679
AB  - Bentonite samples collected from vicinity of Petrovac and Aleksinac were treated with different sulfuric acid molarities. Acid attack dissolved the octahedral sheets by interlayer and edge attack. The effects of the H2SO4 acid caused an exchange of Al3+, Fe3+ and Mg2+ with H. ions leading to a modification of the smectite crystalline structure. The Mg and Fe substitution in the octahedral sheets promoted the dispersion of corresponding layers and formation of amorphous silicon. The activated bentonites, after the treatment of sulfuric acid, exhibited a lower cation-exchange capacity (CEC)and significant increase of specific surface area from 6 to 387 m(2) g(-1) (bentonite from Petrovac) and from 11 to 306 m(2) g(-1) (bentonite from Aleksinac). The acid reaction caused a splitting of particles within the octahedral sheet which led to an increase in specific surface area and decrease in CEC in both bentonites.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
T1  - Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)
EP  - 395
IS  - 1
SP  - 389
VL  - 82
DO  - 10.1016/j.saa.2011.07.068
ER  - 

@article{
author = "Tomić, Zorica and Logar, Vesna P. and Babić, Biljana M. and Rogan, Jelena R. and Makreski, Petre",
year = "2011",
abstract = "Bentonite samples collected from vicinity of Petrovac and Aleksinac were treated with different sulfuric acid molarities. Acid attack dissolved the octahedral sheets by interlayer and edge attack. The effects of the H2SO4 acid caused an exchange of Al3+, Fe3+ and Mg2+ with H. ions leading to a modification of the smectite crystalline structure. The Mg and Fe substitution in the octahedral sheets promoted the dispersion of corresponding layers and formation of amorphous silicon. The activated bentonites, after the treatment of sulfuric acid, exhibited a lower cation-exchange capacity (CEC)and significant increase of specific surface area from 6 to 387 m(2) g(-1) (bentonite from Petrovac) and from 11 to 306 m(2) g(-1) (bentonite from Aleksinac). The acid reaction caused a splitting of particles within the octahedral sheet which led to an increase in specific surface area and decrease in CEC in both bentonites.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy",
title = "Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)",
pages = "395-389",
number = "1",
volume = "82",
doi = "10.1016/j.saa.2011.07.068"
}

Tomić, Z., Logar, V. P., Babić, B. M., Rogan, J. R.,& Makreski, P.. (2011). Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia). in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy
Pergamon-Elsevier Science Ltd, Oxford., 82(1), 389-395.
https://doi.org/10.1016/j.saa.2011.07.068

Tomić Z, Logar VP, Babić BM, Rogan JR, Makreski P. Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia). in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy. 2011;82(1):389-395.
doi:10.1016/j.saa.2011.07.068 .

Tomić, Zorica, Logar, Vesna P., Babić, Biljana M., Rogan, Jelena R., Makreski, Petre, "Comparison of structural, textural and thermal characteristics of pure and acid treated bentonites from Aleksinac and Petrovac (Serbia)" in Spectrochimica Acta Part A-Molecular and Biomolecular Spectroscopy, 82, no. 1 (2011):389-395,
https://doi.org/10.1016/j.saa.2011.07.068 . .

TY  - JOUR
AU  - Tomić, Zorica
AU  - Makreski, Petre
AU  - Gajić, Boško
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2329
AB  - Raman and IR spectroscopy were used for the characterization of several minerals in morphologically similar vertisol sequences from Kizevak (Serbia). It helped us to establish the surface layer transition going from calcic vertisols (containing gypsum and calcite) to calcimagnesic vertisols (containing aragonite, magnesium-calcite and dolomite) derived from peridotite and serpentinite. The observed band positions are found to be solely characteristic for each carbonate mineral and are used to discuss the main structural features of carbonates and sulfates present in the studied soil. It was found that the dolomite, calcite and aragonite concretions are present in the deepest layer of the soil, whereas the gypsum is found in the topsoil. The identification was confirmed of the carbonates having calcite and aragonite structure, and the representative from the sulfate group (gypsum) was confirmed by X-ray powder diffraction.
PB  - Wiley, Hoboken
T2  - Journal of Raman Spectroscopy
T1  - Identification and spectra-structure determination of soil minerals: Raman study supported by IR spectroscopy and X-ray powder diffraction
EP  - 586
IS  - 5
SP  - 582
VL  - 41
DO  - 10.1002/jrs.2476
ER  - 

@article{
author = "Tomić, Zorica and Makreski, Petre and Gajić, Boško",
year = "2010",
abstract = "Raman and IR spectroscopy were used for the characterization of several minerals in morphologically similar vertisol sequences from Kizevak (Serbia). It helped us to establish the surface layer transition going from calcic vertisols (containing gypsum and calcite) to calcimagnesic vertisols (containing aragonite, magnesium-calcite and dolomite) derived from peridotite and serpentinite. The observed band positions are found to be solely characteristic for each carbonate mineral and are used to discuss the main structural features of carbonates and sulfates present in the studied soil. It was found that the dolomite, calcite and aragonite concretions are present in the deepest layer of the soil, whereas the gypsum is found in the topsoil. The identification was confirmed of the carbonates having calcite and aragonite structure, and the representative from the sulfate group (gypsum) was confirmed by X-ray powder diffraction.",
publisher = "Wiley, Hoboken",
journal = "Journal of Raman Spectroscopy",
title = "Identification and spectra-structure determination of soil minerals: Raman study supported by IR spectroscopy and X-ray powder diffraction",
pages = "586-582",
number = "5",
volume = "41",
doi = "10.1002/jrs.2476"
}

Tomić, Z., Makreski, P.,& Gajić, B.. (2010). Identification and spectra-structure determination of soil minerals: Raman study supported by IR spectroscopy and X-ray powder diffraction. in Journal of Raman Spectroscopy
Wiley, Hoboken., 41(5), 582-586.
https://doi.org/10.1002/jrs.2476

Tomić Z, Makreski P, Gajić B. Identification and spectra-structure determination of soil minerals: Raman study supported by IR spectroscopy and X-ray powder diffraction. in Journal of Raman Spectroscopy. 2010;41(5):582-586.
doi:10.1002/jrs.2476 .

Tomić, Zorica, Makreski, Petre, Gajić, Boško, "Identification and spectra-structure determination of soil minerals: Raman study supported by IR spectroscopy and X-ray powder diffraction" in Journal of Raman Spectroscopy, 41, no. 5 (2010):582-586,
https://doi.org/10.1002/jrs.2476 . .