TY  - JOUR
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Rottinghaus, George E.
AU  - Sekulić, Živko
AU  - Milićević, Sonja
AU  - Milonjić, Slobodan K.
AU  - Zarić, Snežana
PY  - 2010
UR  - https://ritnms.itnms.ac.rs/handle/123456789/177
AB  - Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1
EP  - 278
IS  - 1
SP  - 272
VL  - 76
DO  - 10.1016/j.colsurfb.2009.11.003
UR  - conv_577
ER  - 

@article{
author = "Daković, Aleksandra and Kragović, Milan and Rottinghaus, George E. and Sekulić, Živko and Milićević, Sonja and Milonjić, Slobodan K. and Zarić, Snežana",
year = "2010",
abstract = "Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1",
pages = "278-272",
number = "1",
volume = "76",
doi = "10.1016/j.colsurfb.2009.11.003",
url = "conv_577"
}

Daković, A., Kragović, M., Rottinghaus, G. E., Sekulić, Ž., Milićević, S., Milonjić, S. K.,& Zarić, S.. (2010). Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 76(1), 272-278.
https://doi.org/10.1016/j.colsurfb.2009.11.003
conv_577

Daković A, Kragović M, Rottinghaus GE, Sekulić Ž, Milićević S, Milonjić SK, Zarić S. Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces B-Biointerfaces. 2010;76(1):272-278.
doi:10.1016/j.colsurfb.2009.11.003
conv_577 .

Daković, Aleksandra, Kragović, Milan, Rottinghaus, George E., Sekulić, Živko, Milićević, Sonja, Milonjić, Slobodan K., Zarić, Snežana, "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1" in Colloids and Surfaces B-Biointerfaces, 76, no. 1 (2010):272-278,
https://doi.org/10.1016/j.colsurfb.2009.11.003 .,
conv_577 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Sekulić, Živko
AU  - Daković, Aleksandra
AU  - Vučinić, Dušica
AU  - Jovanović, Vladimir
AU  - Stojanović, Jovica
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/164
AB  - In order to obtain hydrophobic material, the water suspension of natural limestone with the high content of calcite (>95%), was treated with different amounts (0.5-4%) of stearic acid dissolved in chloroform. Thermal analysis showed that at lower initial concentrations of stearic acid (up to 2%), surfactant molecules are chemisorbed on calcite surface, while at higher initial concentrations acid molecules are additionally physisorbed on mineral surface. XRPD analysis of starting calcite as well as two modified products with 1.5 and 3% of stearic acid indicated that modification of calcite surface with both amounts of stearic acid, did not cause any changes in the structure of calcite mineral. It was confirmed that long chain stearic acid, in presence of water, alters the calcite surface to strongly hydrophobic, where reaction between stearic acid and Ca2+ ions occurs. Thus, the chemisorption of stearic acid on the calcite surface is responsible for retaining the lower surfactant layer on a charged surface while hydrophobic bonding causes formation of the upper surfactant layer The optimal amount of stearic acid needed to cover the calcite surface with a monolayer of organic molecules lies between 1.5% and 2%.
PB  - University of Chemistry and Technology, Prague
T2  - Ceramics - Silikaty
T1  - Surface properties of natural calcite filler treated with stearic acid
EP  - 275
IS  - 4
SP  - 268
VL  - 53
UR  - conv_1089
ER  - 

@article{
author = "Mihajlović, Slavica and Sekulić, Živko and Daković, Aleksandra and Vučinić, Dušica and Jovanović, Vladimir and Stojanović, Jovica",
year = "2009",
abstract = "In order to obtain hydrophobic material, the water suspension of natural limestone with the high content of calcite (>95%), was treated with different amounts (0.5-4%) of stearic acid dissolved in chloroform. Thermal analysis showed that at lower initial concentrations of stearic acid (up to 2%), surfactant molecules are chemisorbed on calcite surface, while at higher initial concentrations acid molecules are additionally physisorbed on mineral surface. XRPD analysis of starting calcite as well as two modified products with 1.5 and 3% of stearic acid indicated that modification of calcite surface with both amounts of stearic acid, did not cause any changes in the structure of calcite mineral. It was confirmed that long chain stearic acid, in presence of water, alters the calcite surface to strongly hydrophobic, where reaction between stearic acid and Ca2+ ions occurs. Thus, the chemisorption of stearic acid on the calcite surface is responsible for retaining the lower surfactant layer on a charged surface while hydrophobic bonding causes formation of the upper surfactant layer The optimal amount of stearic acid needed to cover the calcite surface with a monolayer of organic molecules lies between 1.5% and 2%.",
publisher = "University of Chemistry and Technology, Prague",
journal = "Ceramics - Silikaty",
title = "Surface properties of natural calcite filler treated with stearic acid",
pages = "275-268",
number = "4",
volume = "53",
url = "conv_1089"
}

Mihajlović, S., Sekulić, Ž., Daković, A., Vučinić, D., Jovanović, V.,& Stojanović, J.. (2009). Surface properties of natural calcite filler treated with stearic acid. in Ceramics - Silikaty
University of Chemistry and Technology, Prague., 53(4), 268-275.
conv_1089

Mihajlović S, Sekulić Ž, Daković A, Vučinić D, Jovanović V, Stojanović J. Surface properties of natural calcite filler treated with stearic acid. in Ceramics - Silikaty. 2009;53(4):268-275.
conv_1089 .

Mihajlović, Slavica, Sekulić, Živko, Daković, Aleksandra, Vučinić, Dušica, Jovanović, Vladimir, Stojanović, Jovica, "Surface properties of natural calcite filler treated with stearic acid" in Ceramics - Silikaty, 53, no. 4 (2009):268-275,
conv_1089 .

TY  - JOUR
AU  - Kragović, Milan
AU  - Daković, Aleksandra
AU  - Milićević, Sonja
AU  - Sekulić, Živko
AU  - Milonjić, Slobodan K.
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/161
AB  - U radu su prikazani rezultati modifikovanja površine prirodnog zeolita različitim količinama (2, 5 i 10 mmol M+/100 g) oktadecildimetil benzil amonijum jona (ODMBA). Dobijeni organozeoliti su označeni kao OZ-2, OZ-5 i OZ-10. Stepen jonske izmene praćen je određivanjem sadržaja oslobođenih neorganskih katjona iz zeolita. Rezultati su potvrdili da se reakcija između ODMBA i polaznog zeolita odvija mehanizmom katjonske izmene i da je izmena kvantitativna. Dobijena vrednost za tačku nultog naelektrisanja, pHpzc, za prirodni zeolit iznosi 6,8±0,1, dok pHpzc za organozeolite OZ-2, OZ-5 i OZ-10 iznosi 7,0±0,1. Značajna razlika u pHpzc nije zapažena ni kod jednog organozeolita u odnosu na polazni mineral, što ukazuje da dobijeni organozeoliti imaju slične površinske funkcionalne grupe sa sličnim kiselo-baznim karakteristikama kao i polazni zeolit.
AB  - In this paper, the results of the surface modification of natural zeolite with different amounts (2, 5 and 10 mmol M+/100g) of octadecyldimethylbenzyl ammonium ions (ODMBA) are presented. The obtained organozeolites were denoted as OZ-2, OZ-5 and OZ-10. The degree of ion exchange was followed by determination of amounts of inorganic cations released from zeolite. Results confirmed that reaction between ODMBA and starting zeolite has occurred via ion exchange mechanism. The obtained value for point of zero charge, pHpzc, of natural zeolite was 6.8±0.1, while for OZ-2, OZ-5 and OZ-10 pHpzc was 7.0±0.1. Below the pHpzc, the surfaces of materials are positive while at pH values higher than pHpzc their surfaces are negative. Compared to the pHpzc of natural zeolite, no significant differences in pHpzc was observed for all three organozeolites indicating that obtained products have similar functional groups with similar acid and basic characteristics as starting zeolite. The pHpzc was not dependent on the amount of ODMBA ions at the zeolitic surface and the value of pHpzc for all investigated sorbents is the same for all three electrolyte concentrations indicating that the pHpzc of each material is independent of the ionic strength of KNO3.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Uticaj sorpcije organskog katjona na tačku nultog naelektrisanja prirodnog zeolita
T1  - Influence of organic cations sorption on the point of zero charge of natural zeolite
EP  - 330
IS  - 4
SP  - 325
VL  - 63
DO  - 10.2298/HEMIND0904325K
UR  - conv_293
ER  - 

@article{
author = "Kragović, Milan and Daković, Aleksandra and Milićević, Sonja and Sekulić, Živko and Milonjić, Slobodan K.",
year = "2009",
abstract = "U radu su prikazani rezultati modifikovanja površine prirodnog zeolita različitim količinama (2, 5 i 10 mmol M+/100 g) oktadecildimetil benzil amonijum jona (ODMBA). Dobijeni organozeoliti su označeni kao OZ-2, OZ-5 i OZ-10. Stepen jonske izmene praćen je određivanjem sadržaja oslobođenih neorganskih katjona iz zeolita. Rezultati su potvrdili da se reakcija između ODMBA i polaznog zeolita odvija mehanizmom katjonske izmene i da je izmena kvantitativna. Dobijena vrednost za tačku nultog naelektrisanja, pHpzc, za prirodni zeolit iznosi 6,8±0,1, dok pHpzc za organozeolite OZ-2, OZ-5 i OZ-10 iznosi 7,0±0,1. Značajna razlika u pHpzc nije zapažena ni kod jednog organozeolita u odnosu na polazni mineral, što ukazuje da dobijeni organozeoliti imaju slične površinske funkcionalne grupe sa sličnim kiselo-baznim karakteristikama kao i polazni zeolit., In this paper, the results of the surface modification of natural zeolite with different amounts (2, 5 and 10 mmol M+/100g) of octadecyldimethylbenzyl ammonium ions (ODMBA) are presented. The obtained organozeolites were denoted as OZ-2, OZ-5 and OZ-10. The degree of ion exchange was followed by determination of amounts of inorganic cations released from zeolite. Results confirmed that reaction between ODMBA and starting zeolite has occurred via ion exchange mechanism. The obtained value for point of zero charge, pHpzc, of natural zeolite was 6.8±0.1, while for OZ-2, OZ-5 and OZ-10 pHpzc was 7.0±0.1. Below the pHpzc, the surfaces of materials are positive while at pH values higher than pHpzc their surfaces are negative. Compared to the pHpzc of natural zeolite, no significant differences in pHpzc was observed for all three organozeolites indicating that obtained products have similar functional groups with similar acid and basic characteristics as starting zeolite. The pHpzc was not dependent on the amount of ODMBA ions at the zeolitic surface and the value of pHpzc for all investigated sorbents is the same for all three electrolyte concentrations indicating that the pHpzc of each material is independent of the ionic strength of KNO3.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Uticaj sorpcije organskog katjona na tačku nultog naelektrisanja prirodnog zeolita, Influence of organic cations sorption on the point of zero charge of natural zeolite",
pages = "330-325",
number = "4",
volume = "63",
doi = "10.2298/HEMIND0904325K",
url = "conv_293"
}

Kragović, M., Daković, A., Milićević, S., Sekulić, Ž.,& Milonjić, S. K.. (2009). Uticaj sorpcije organskog katjona na tačku nultog naelektrisanja prirodnog zeolita. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 63(4), 325-330.
https://doi.org/10.2298/HEMIND0904325K
conv_293

Kragović M, Daković A, Milićević S, Sekulić Ž, Milonjić SK. Uticaj sorpcije organskog katjona na tačku nultog naelektrisanja prirodnog zeolita. in Hemijska industrija. 2009;63(4):325-330.
doi:10.2298/HEMIND0904325K
conv_293 .

Kragović, Milan, Daković, Aleksandra, Milićević, Sonja, Sekulić, Živko, Milonjić, Slobodan K., "Uticaj sorpcije organskog katjona na tačku nultog naelektrisanja prirodnog zeolita" in Hemijska industrija, 63, no. 4 (2009):325-330,
https://doi.org/10.2298/HEMIND0904325K .,
conv_293 .

TY  - JOUR
AU  - Mihajlović, Slavica
AU  - Daković, Aleksandra
AU  - Sekulić, Živko
AU  - Ileš, Deana
AU  - Kragović, Milan
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/160
AB  - U radu su prikazani rezultati modifikovanja površine kalcita suvim i mokrim postupkom. Kalcit je glavni i najzastupljeniji mineral kod prirodnog krečnjaka (>95%). Ispitivanja su vršena na seriji uzoraka sa sadržajem stearinske kiseline , kao površinski aktivne materije, od 0,5, 1, 1.5, 2, 3 i 4%. Na proizvodima dobijenim suvim i mokrim postupkom modifikovanja urađena je diferencijalno termijska analiza (DTA), termo-gravimetrijska analiza (TG) i skenirajuća elektronska mikroskopija (SEM). Stepen hidrofobnosti uzoraka praćen je određivanjem indeksa obloženosti. Rezultati pokazuju da je kod mokrog postupka najveći indeks obloženosti od 99,9% dobijen je na uzorku sa sadržajem stearinske kiseline od 1,5%, a kod suvog postupka kod uzorka sa sadržajem stearinske kiseline od 3%. Rezultati termičke analize pokazuju da se osnovni egzotermni maksimum kod oba postupka javlja na približno istim temperaturama (>310°C) što ukazuje na postojanje istih aktivnih mesta na površini kalcita na kojima može biti hemisorbovana stearinska kiselina. Položaj i intenzitet ostalih egzotermnih pikova ukazuje na različito vezivanje stearinske kiseline za površinu kalcita kod mokrog i suvog postupka.
AB  - In order to obtain hydrophobic material, the surface of natural limestone with the high content of calcite (>95%), was treated with 0.5, 1, 1.5, 2, 3 and 4% of stearic acid. Two methods were used for modification: the solution method and the dry coating. The obtained products were characterized using the thermal analysis (DT/TG), X-ray powder diffraction analysis (XRPD), scanning electron microscopy (SEM) and by the evaluation of floating test. Results of floating test showed that when the solution method was applied, the hydrophobicity arrived at above 99% when the amount of stearic acid was 1.5%, while with the dry coating the same hydrophobicity was achieved with 3% of stearic acid. From the position of the principal exothermic peak (> 310°C) at DTA curves, for calcites modified with dry coating and with the solution method, it can be concluded that with both modification processes, the same active sites exist at the calcite surface onto which stearic acid may be chemisorbed. However, the position and the intensity of the other exothermic peaks, indicate the differences in bonding of stearic acid at the calcite surface during the solution method and the dry coating.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Površinska adsorpcija stearinske kiseline na prirodnom kalcitu
T1  - Surface adsorption of stearic acid by natural calcite
EP  - 106
IS  - 2
SP  - 101
VL  - 63
DO  - 10.2298/HEMIND0902101M
UR  - conv_292
ER  - 

@article{
author = "Mihajlović, Slavica and Daković, Aleksandra and Sekulić, Živko and Ileš, Deana and Kragović, Milan",
year = "2009",
abstract = "U radu su prikazani rezultati modifikovanja površine kalcita suvim i mokrim postupkom. Kalcit je glavni i najzastupljeniji mineral kod prirodnog krečnjaka (>95%). Ispitivanja su vršena na seriji uzoraka sa sadržajem stearinske kiseline , kao površinski aktivne materije, od 0,5, 1, 1.5, 2, 3 i 4%. Na proizvodima dobijenim suvim i mokrim postupkom modifikovanja urađena je diferencijalno termijska analiza (DTA), termo-gravimetrijska analiza (TG) i skenirajuća elektronska mikroskopija (SEM). Stepen hidrofobnosti uzoraka praćen je određivanjem indeksa obloženosti. Rezultati pokazuju da je kod mokrog postupka najveći indeks obloženosti od 99,9% dobijen je na uzorku sa sadržajem stearinske kiseline od 1,5%, a kod suvog postupka kod uzorka sa sadržajem stearinske kiseline od 3%. Rezultati termičke analize pokazuju da se osnovni egzotermni maksimum kod oba postupka javlja na približno istim temperaturama (>310°C) što ukazuje na postojanje istih aktivnih mesta na površini kalcita na kojima može biti hemisorbovana stearinska kiselina. Položaj i intenzitet ostalih egzotermnih pikova ukazuje na različito vezivanje stearinske kiseline za površinu kalcita kod mokrog i suvog postupka., In order to obtain hydrophobic material, the surface of natural limestone with the high content of calcite (>95%), was treated with 0.5, 1, 1.5, 2, 3 and 4% of stearic acid. Two methods were used for modification: the solution method and the dry coating. The obtained products were characterized using the thermal analysis (DT/TG), X-ray powder diffraction analysis (XRPD), scanning electron microscopy (SEM) and by the evaluation of floating test. Results of floating test showed that when the solution method was applied, the hydrophobicity arrived at above 99% when the amount of stearic acid was 1.5%, while with the dry coating the same hydrophobicity was achieved with 3% of stearic acid. From the position of the principal exothermic peak (> 310°C) at DTA curves, for calcites modified with dry coating and with the solution method, it can be concluded that with both modification processes, the same active sites exist at the calcite surface onto which stearic acid may be chemisorbed. However, the position and the intensity of the other exothermic peaks, indicate the differences in bonding of stearic acid at the calcite surface during the solution method and the dry coating.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Površinska adsorpcija stearinske kiseline na prirodnom kalcitu, Surface adsorption of stearic acid by natural calcite",
pages = "106-101",
number = "2",
volume = "63",
doi = "10.2298/HEMIND0902101M",
url = "conv_292"
}

Mihajlović, S., Daković, A., Sekulić, Ž., Ileš, D.,& Kragović, M.. (2009). Površinska adsorpcija stearinske kiseline na prirodnom kalcitu. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 63(2), 101-106.
https://doi.org/10.2298/HEMIND0902101M
conv_292

Mihajlović S, Daković A, Sekulić Ž, Ileš D, Kragović M. Površinska adsorpcija stearinske kiseline na prirodnom kalcitu. in Hemijska industrija. 2009;63(2):101-106.
doi:10.2298/HEMIND0902101M
conv_292 .

Mihajlović, Slavica, Daković, Aleksandra, Sekulić, Živko, Ileš, Deana, Kragović, Milan, "Površinska adsorpcija stearinske kiseline na prirodnom kalcitu" in Hemijska industrija, 63, no. 2 (2009):101-106,
https://doi.org/10.2298/HEMIND0902101M .,
conv_292 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Sekulić, Živko
AU  - Rottinghaus, George E.
AU  - Stojanović, Ana
AU  - Milićević, Sonja
AU  - Kragović, Milan
PY  - 2009
UR  - https://ritnms.itnms.ac.rs/handle/123456789/159
AB  - U ovom radu su prikazani rezultati ispitivanja adsorpcije T-2 toksina na mineralu iz grupe smektita-hektoritu, na različitim pH vrednostima (3,0; 7,0 i 9,0). Ispitivanja su pokazala da adsorbovana količina T-2 toksina na hektoritu opada sa porastom sadržaja čvrste faze u suspenziji na svim ispitivanim pH vrednostima. Sa adsorpcionih izotermi se primećuje da sa povećanjem početne koncentracije T-2 toksina raste i adsorpcija T-2 toksina, na svim ispitivanim pH vrednostima. Adsorpcija T-2 toksina na hektoritu se može opisati nelinearanim (Lengmir, Langmuir) tipom izoterme na pH 3,0; 7,0 i 9,0, pri čemu faktor korelacije (r2) iznosi 0,943 na pH 3,0; 0,919 na pH 7,0 i 0,939 na pH 9,0. Maksimalna adsorbovana količina T-2 toksina na hektoritu na osnovu Lengmirove izoterme (9,178 mg g-1 na pH 3,0; 9,930 mg g-1 na pH 7,0 i 19,341 mg g-1 na pH 9,0), ukazuje da je adsorpcija T-2 toksina na hektoritu zavisna od pH. Dobijeni rezultati ukazuju na postojanje specifičnih aktivnih centara na hektoritu na kojima se T-2 toksin adorbuje.
AB  - The adsorption of T-2 toxin by the natural smectite mineral-hectorite at pH 3.0, 7.0 and 9.0 was investigated. The results of T-2 toxin adsorption on hectorite showed that the T-2 adsorption capacity decreased with increasing concentration of adsorbent in the suspension for all the investigated pH values. From the adsorption isotherms, an increase in T-2 toxin adsorption with increasing initial T-2 toxin concentration was observed for all the investigated pH values. The T-2 toxin adsorption by hectorite followed a non-linear (Langmuir) type of isotherm at pH 3.0, 7.0 and 9.0, with correlation coefficients (r2) of 0.943 at pH 3.0, 0.919 at pH 7.0 and 0.939 at pH 9.0. The estimated maximum T-2 toxin adsorption by hectorite based on the Langmuir fit to the data (9.178 mg/g at pH 3.0, 9.930 mg/g at pH 7.0, and 19.341 mg/g at pH 9.0), indicated that the adsorption of T-2 toxin by hectorite is pH dependent. The obtained data suggest the existence of specific active sites in hectorite onto which the T-2 toxin is adsorbed.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Adsorpcija T-2 toksina na hektoritu
T1  - T-2 toxin adsorption by hectorite
EP  - 1292
IS  - 11
SP  - 1283
VL  - 74
DO  - 10.2298/JSC0911283D
UR  - conv_571
ER  - 

@article{
author = "Daković, Aleksandra and Sekulić, Živko and Rottinghaus, George E. and Stojanović, Ana and Milićević, Sonja and Kragović, Milan",
year = "2009",
abstract = "U ovom radu su prikazani rezultati ispitivanja adsorpcije T-2 toksina na mineralu iz grupe smektita-hektoritu, na različitim pH vrednostima (3,0; 7,0 i 9,0). Ispitivanja su pokazala da adsorbovana količina T-2 toksina na hektoritu opada sa porastom sadržaja čvrste faze u suspenziji na svim ispitivanim pH vrednostima. Sa adsorpcionih izotermi se primećuje da sa povećanjem početne koncentracije T-2 toksina raste i adsorpcija T-2 toksina, na svim ispitivanim pH vrednostima. Adsorpcija T-2 toksina na hektoritu se može opisati nelinearanim (Lengmir, Langmuir) tipom izoterme na pH 3,0; 7,0 i 9,0, pri čemu faktor korelacije (r2) iznosi 0,943 na pH 3,0; 0,919 na pH 7,0 i 0,939 na pH 9,0. Maksimalna adsorbovana količina T-2 toksina na hektoritu na osnovu Lengmirove izoterme (9,178 mg g-1 na pH 3,0; 9,930 mg g-1 na pH 7,0 i 19,341 mg g-1 na pH 9,0), ukazuje da je adsorpcija T-2 toksina na hektoritu zavisna od pH. Dobijeni rezultati ukazuju na postojanje specifičnih aktivnih centara na hektoritu na kojima se T-2 toksin adorbuje., The adsorption of T-2 toxin by the natural smectite mineral-hectorite at pH 3.0, 7.0 and 9.0 was investigated. The results of T-2 toxin adsorption on hectorite showed that the T-2 adsorption capacity decreased with increasing concentration of adsorbent in the suspension for all the investigated pH values. From the adsorption isotherms, an increase in T-2 toxin adsorption with increasing initial T-2 toxin concentration was observed for all the investigated pH values. The T-2 toxin adsorption by hectorite followed a non-linear (Langmuir) type of isotherm at pH 3.0, 7.0 and 9.0, with correlation coefficients (r2) of 0.943 at pH 3.0, 0.919 at pH 7.0 and 0.939 at pH 9.0. The estimated maximum T-2 toxin adsorption by hectorite based on the Langmuir fit to the data (9.178 mg/g at pH 3.0, 9.930 mg/g at pH 7.0, and 19.341 mg/g at pH 9.0), indicated that the adsorption of T-2 toxin by hectorite is pH dependent. The obtained data suggest the existence of specific active sites in hectorite onto which the T-2 toxin is adsorbed.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorpcija T-2 toksina na hektoritu, T-2 toxin adsorption by hectorite",
pages = "1292-1283",
number = "11",
volume = "74",
doi = "10.2298/JSC0911283D",
url = "conv_571"
}

Daković, A., Sekulić, Ž., Rottinghaus, G. E., Stojanović, A., Milićević, S.,& Kragović, M.. (2009). Adsorpcija T-2 toksina na hektoritu. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 74(11), 1283-1292.
https://doi.org/10.2298/JSC0911283D
conv_571

Daković A, Sekulić Ž, Rottinghaus GE, Stojanović A, Milićević S, Kragović M. Adsorpcija T-2 toksina na hektoritu. in Journal of the Serbian Chemical Society. 2009;74(11):1283-1292.
doi:10.2298/JSC0911283D
conv_571 .

Daković, Aleksandra, Sekulić, Živko, Rottinghaus, George E., Stojanović, Ana, Milićević, Sonja, Kragović, Milan, "Adsorpcija T-2 toksina na hektoritu" in Journal of the Serbian Chemical Society, 74, no. 11 (2009):1283-1292,
https://doi.org/10.2298/JSC0911283D .,
conv_571 .