TY  - JOUR
AU  - Vujaković, Aleksandra
AU  - Daković, Aleksandra
AU  - Lemić, Jovan
AU  - Radosavljević-Mihajlović, Ana
AU  - Tomašević-Čanović, Magdalena
PY  - 2003
UR  - https://ritnms.itnms.ac.rs/handle/123456789/52
AB  - Organo mineralni kompleksi su dobijeni aktivacijom osnovnih minerala (zeolita, bentonita i diatomijske zemlje) sa primarnim aminom (olejlaminom) i alkil amonijum jonom (stearil dimetil benzil amonijum hloridom). Efikasan adsorbent anjona je pripremljen modifikacijom površine prirodnog zeolita sa primarnim aminom. Polazni zeolit je prvo tretiran sa 2 M HCl, a zatim je na H-formi zeolita izvršena adsorpcija olejlamina. Napravljena su još četiri organo kompleksa modifikacijom bentonita i diatomijske zemlje sa stearil dimetil benzil amonijum jonom i ispitana je adsorpcija anjona na njima. Eksperimenti adsorpcije anjona su pokazali da se najefikasniji adsorbent za prečišćavanje voda kontaminiranim anjonima dobija dvostepenim (kiselinsko aminskim) tretiranjem prirodnog zeolita.
AB  - Organo-mineral complexes were obtained by treatment of aluminosilicate minerals (zeolite, bentonite and diatomaceous earth) with a primary amine (oleylamine) and an alkyl ammonium salt (stearyldimethylbenzyl ammonium chloride). The modification of the zeolite surface was carried out in two steps. The first step was treatment of the zeolite with 2M HCl. This acid treatment of the zeolite increased its affinity for neutral molecules such as surface-active amines. The second step of the modification was the adsorption of oleylamine on the acid treated zeolite. Four types of organo-mineral complexes were prepared and their anion adsorption properties were compared to those of organo-zeolite. The adsorption of sulphate bichromate and dihydrogenphosphate anions on the organo-mineral complexes was investigated. The anion adsorption measurements showed that the most efficient adsorbent for anion water pollutants was the primary amine modified H+-form zeolite.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima
T1  - Adsorption of inorganic anionic contaminants on surfactant modified minerals
EP  - 841
IS  - 11
SP  - 833
VL  - 68
DO  - 10.2298/JSC0311833V
UR  - conv_470
ER  - 

@article{
author = "Vujaković, Aleksandra and Daković, Aleksandra and Lemić, Jovan and Radosavljević-Mihajlović, Ana and Tomašević-Čanović, Magdalena",
year = "2003",
abstract = "Organo mineralni kompleksi su dobijeni aktivacijom osnovnih minerala (zeolita, bentonita i diatomijske zemlje) sa primarnim aminom (olejlaminom) i alkil amonijum jonom (stearil dimetil benzil amonijum hloridom). Efikasan adsorbent anjona je pripremljen modifikacijom površine prirodnog zeolita sa primarnim aminom. Polazni zeolit je prvo tretiran sa 2 M HCl, a zatim je na H-formi zeolita izvršena adsorpcija olejlamina. Napravljena su još četiri organo kompleksa modifikacijom bentonita i diatomijske zemlje sa stearil dimetil benzil amonijum jonom i ispitana je adsorpcija anjona na njima. Eksperimenti adsorpcije anjona su pokazali da se najefikasniji adsorbent za prečišćavanje voda kontaminiranim anjonima dobija dvostepenim (kiselinsko aminskim) tretiranjem prirodnog zeolita., Organo-mineral complexes were obtained by treatment of aluminosilicate minerals (zeolite, bentonite and diatomaceous earth) with a primary amine (oleylamine) and an alkyl ammonium salt (stearyldimethylbenzyl ammonium chloride). The modification of the zeolite surface was carried out in two steps. The first step was treatment of the zeolite with 2M HCl. This acid treatment of the zeolite increased its affinity for neutral molecules such as surface-active amines. The second step of the modification was the adsorption of oleylamine on the acid treated zeolite. Four types of organo-mineral complexes were prepared and their anion adsorption properties were compared to those of organo-zeolite. The adsorption of sulphate bichromate and dihydrogenphosphate anions on the organo-mineral complexes was investigated. The anion adsorption measurements showed that the most efficient adsorbent for anion water pollutants was the primary amine modified H+-form zeolite.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima, Adsorption of inorganic anionic contaminants on surfactant modified minerals",
pages = "841-833",
number = "11",
volume = "68",
doi = "10.2298/JSC0311833V",
url = "conv_470"
}

Vujaković, A., Daković, A., Lemić, J., Radosavljević-Mihajlović, A.,& Tomašević-Čanović, M.. (2003). Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 68(11), 833-841.
https://doi.org/10.2298/JSC0311833V
conv_470

Vujaković A, Daković A, Lemić J, Radosavljević-Mihajlović A, Tomašević-Čanović M. Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima. in Journal of the Serbian Chemical Society. 2003;68(11):833-841.
doi:10.2298/JSC0311833V
conv_470 .

Vujaković, Aleksandra, Daković, Aleksandra, Lemić, Jovan, Radosavljević-Mihajlović, Ana, Tomašević-Čanović, Magdalena, "Adsorpcija neorganskih anjonskih zagađivača na modifikovanim mineralima" in Journal of the Serbian Chemical Society, 68, no. 11 (2003):833-841,
https://doi.org/10.2298/JSC0311833V .,
conv_470 .

TY  - JOUR
AU  - Vujaković, Aleksandra
AU  - Tomašević-Čanović, Magdalena
AU  - Daković, Aleksandra
AU  - Dondur, Vera
PY  - 2000
UR  - https://ritnms.itnms.ac.rs/handle/123456789/28
AB  - The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite (SMC) was investigated. The SMCs were prepared by the adsorption of cis-1-aminoctadecen-9 (oleylamine) on both modified and unmodified natural clinoptilolite tuff. The properties of the modified clinoptilolite samples, such as cation type, structure of the zeolite framework and ECEC value, determined the mechanism of oleylamine adsorption, and consequently anion adsorption on the external clinoptilolite surface. According to the strength of the anion adsorption, two groups of SMCs could be distinguished: strong and weak anion adsorbents. Strong anion adsorbents were obtained by oleylamine adsorption on H+-clinoptilolites by protonation of the -NH2 groups. This mechanism of oleylamine adsorption resulted in the surface precipitation mechanism of anion adsorption being the dominant mechanism. The oleylamine derivatives of Ca- and Na-clinoptilolite were weak anion adsorbents. Oleylamine is adsorbed on Ca- and Na-clinoptilolite by hydrogen bonding, thus yielding insufficient adsorption sites fur anions. Hydrogenchromate and dihydrogenphosphate anions were nevertheless adsorbed on these SMCs by interaction with oleylamine. The experiments of anion adsorption on various oleylamine loaded SMCs confirmed the existence of two types of anion adsorption sites and showed that excess oleylamine did not significantly influence the anion adsorption in the investigated concentration range. The kinetic results showed that SO42- and H2PO4- adsorptions were slow processes while HCrO4- adsorption was completed in a few minutes,
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Clay Science
T1  - The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite
EP  - 277
IS  - 5-6
SP  - 265
VL  - 17
DO  - 10.1016/S0169-1317(00)00019-3
UR  - conv_451
ER  - 

@article{
author = "Vujaković, Aleksandra and Tomašević-Čanović, Magdalena and Daković, Aleksandra and Dondur, Vera",
year = "2000",
abstract = "The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite (SMC) was investigated. The SMCs were prepared by the adsorption of cis-1-aminoctadecen-9 (oleylamine) on both modified and unmodified natural clinoptilolite tuff. The properties of the modified clinoptilolite samples, such as cation type, structure of the zeolite framework and ECEC value, determined the mechanism of oleylamine adsorption, and consequently anion adsorption on the external clinoptilolite surface. According to the strength of the anion adsorption, two groups of SMCs could be distinguished: strong and weak anion adsorbents. Strong anion adsorbents were obtained by oleylamine adsorption on H+-clinoptilolites by protonation of the -NH2 groups. This mechanism of oleylamine adsorption resulted in the surface precipitation mechanism of anion adsorption being the dominant mechanism. The oleylamine derivatives of Ca- and Na-clinoptilolite were weak anion adsorbents. Oleylamine is adsorbed on Ca- and Na-clinoptilolite by hydrogen bonding, thus yielding insufficient adsorption sites fur anions. Hydrogenchromate and dihydrogenphosphate anions were nevertheless adsorbed on these SMCs by interaction with oleylamine. The experiments of anion adsorption on various oleylamine loaded SMCs confirmed the existence of two types of anion adsorption sites and showed that excess oleylamine did not significantly influence the anion adsorption in the investigated concentration range. The kinetic results showed that SO42- and H2PO4- adsorptions were slow processes while HCrO4- adsorption was completed in a few minutes,",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Clay Science",
title = "The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite",
pages = "277-265",
number = "5-6",
volume = "17",
doi = "10.1016/S0169-1317(00)00019-3",
url = "conv_451"
}

Vujaković, A., Tomašević-Čanović, M., Daković, A.,& Dondur, V.. (2000). The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite. in Applied Clay Science
Elsevier Science Bv, Amsterdam., 17(5-6), 265-277.
https://doi.org/10.1016/S0169-1317(00)00019-3
conv_451

Vujaković A, Tomašević-Čanović M, Daković A, Dondur V. The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite. in Applied Clay Science. 2000;17(5-6):265-277.
doi:10.1016/S0169-1317(00)00019-3
conv_451 .

Vujaković, Aleksandra, Tomašević-Čanović, Magdalena, Daković, Aleksandra, Dondur, Vera, "The adsorption of sulphate, hydrogenchromate and dihydrogenphosphate anions on surfactant-modified clinoptilolite" in Applied Clay Science, 17, no. 5-6 (2000):265-277,
https://doi.org/10.1016/S0169-1317(00)00019-3 .,
conv_451 .

TY  - JOUR
AU  - Daković, Aleksandra
AU  - Tomašević-Čanović, Magdalena
AU  - Dondur, Vera
AU  - Vujaković, Aleksandra
AU  - Radošević, Predrag
PY  - 2000
UR  - https://ritnms.itnms.ac.rs/handle/123456789/26
AB  - Praćena je kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu, u vodenom rastvoru elektrolita, na pH 2 i pH 7 i na temperaturi 37 °C. Dobijeni rezultati pokazuju da proces adsorpcije oba toksina započinje brzom reakcijom i da se najveći deo toksina adsorbuje u prvih nekoliko minuta. Posle ovog brzog procesa sledi znatno sporiji proces u kome se nastavlja vezivanje toksina za aktivne centre mineralnog adsorbenta. Pokazano je metodom početnih brzina da je brzi proces adsorpcije oba toksina reakcija prvog reda, dok je spori proces reakcija nultog reda. Indeksi adsorpcije i brzine adsorpcije zavise od pH sredine. U ispitivanom opsegu koncentracija (500-3000 μg/dm3 postignuti su visoki indeksi adsorpcije kako aflatoksina B1 tako i aflatoksina G2 (> 80%).
AB  - The kinetics of aflatoxins B1 and G2 adsorption on Ca-clinoptilolite at pH 2 and 7, in aqueous electrolyte at 37 °C were studied. For both aflatoxins, the adsorption process begins with a fast reaction whereby most of the toxin is adsorbed in the first few minutes. This fast process is followed by the significantly slower process of aflatoxin bonding at active centers of mineral adsorbent. The initial rate method showed that the fast adsorption process of aflatoxin B1 and G2, at both pH values is a first order reaction, while the slow adsorption process of these aflatoxins is a zero order reaction. The adsorption indexes and adsorption rates for both examined toxins were pH dependent. In the investigated initial toxins concentration ranges (500-3000 μg/dm3), high adsorption indexes were achieved (> 80 %).
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu
T1  - Kinetics of aflatoxin B1 and G2 adsorption on Ca-clinoptilolite
EP  - 723
IS  - 10
SP  - 715
VL  - 65
DO  - 10.2298/JSC0010715D
UR  - conv_450
ER  - 

@article{
author = "Daković, Aleksandra and Tomašević-Čanović, Magdalena and Dondur, Vera and Vujaković, Aleksandra and Radošević, Predrag",
year = "2000",
abstract = "Praćena je kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu, u vodenom rastvoru elektrolita, na pH 2 i pH 7 i na temperaturi 37 °C. Dobijeni rezultati pokazuju da proces adsorpcije oba toksina započinje brzom reakcijom i da se najveći deo toksina adsorbuje u prvih nekoliko minuta. Posle ovog brzog procesa sledi znatno sporiji proces u kome se nastavlja vezivanje toksina za aktivne centre mineralnog adsorbenta. Pokazano je metodom početnih brzina da je brzi proces adsorpcije oba toksina reakcija prvog reda, dok je spori proces reakcija nultog reda. Indeksi adsorpcije i brzine adsorpcije zavise od pH sredine. U ispitivanom opsegu koncentracija (500-3000 μg/dm3 postignuti su visoki indeksi adsorpcije kako aflatoksina B1 tako i aflatoksina G2 (> 80%)., The kinetics of aflatoxins B1 and G2 adsorption on Ca-clinoptilolite at pH 2 and 7, in aqueous electrolyte at 37 °C were studied. For both aflatoxins, the adsorption process begins with a fast reaction whereby most of the toxin is adsorbed in the first few minutes. This fast process is followed by the significantly slower process of aflatoxin bonding at active centers of mineral adsorbent. The initial rate method showed that the fast adsorption process of aflatoxin B1 and G2, at both pH values is a first order reaction, while the slow adsorption process of these aflatoxins is a zero order reaction. The adsorption indexes and adsorption rates for both examined toxins were pH dependent. In the investigated initial toxins concentration ranges (500-3000 μg/dm3), high adsorption indexes were achieved (> 80 %).",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu, Kinetics of aflatoxin B1 and G2 adsorption on Ca-clinoptilolite",
pages = "723-715",
number = "10",
volume = "65",
doi = "10.2298/JSC0010715D",
url = "conv_450"
}

Daković, A., Tomašević-Čanović, M., Dondur, V., Vujaković, A.,& Radošević, P.. (2000). Kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 65(10), 715-723.
https://doi.org/10.2298/JSC0010715D
conv_450

Daković A, Tomašević-Čanović M, Dondur V, Vujaković A, Radošević P. Kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu. in Journal of the Serbian Chemical Society. 2000;65(10):715-723.
doi:10.2298/JSC0010715D
conv_450 .

Daković, Aleksandra, Tomašević-Čanović, Magdalena, Dondur, Vera, Vujaković, Aleksandra, Radošević, Predrag, "Kinetika adsorpcije aflatoksina B1 i G2 na Ca-klinoptilolitu" in Journal of the Serbian Chemical Society, 65, no. 10 (2000):715-723,
https://doi.org/10.2298/JSC0010715D .,
conv_450 .