TY  - JOUR
AU  - Dević, Gordana
AU  - Pfendt, Petar A.
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/371
AB  - Based on the abundant minerals in a Miocene freshwater sequence of mixed sediments (pieces of coal in clays, sand-stones and shales) alternating with coal layers, the following main sedimentation environments were distinguished: illite-montmorillonitic (I-M), calcitic (Ct) and coal-forming environment. Applying factor analyses to 16 geochemical parameters, an environmentally- specific early diagenetic connection between the sulphur transformation processes, amount of Corg and precursor material species (C27-C29-steranes) was determined. It was found that the effects of limiting factors on Spyr formation depended on the hydrogeochemical conditions of individual sedimentation environments. Pyrite formation in coals depended directly on participation of higher plant precursor materials and/or on the total sulphur content in the system. In the MS, pyrite formation directly depended on total sulphur content, hydrogeological conditions and the amount of Corg.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Energy Sources, Part A: Recovery, Utilization and Environmental Effects
T1  - Diagenetic relationships between sulphur species and formation of pyrite in coals and sediments
VL  - 29
IS  - 16
SP  - 1487
EP  - 1498
DO  - 10.1080/00908310600626531
ER  - 

@article{
author = "Dević, Gordana and Pfendt, Petar A.",
year = "2007",
abstract = "Based on the abundant minerals in a Miocene freshwater sequence of mixed sediments (pieces of coal in clays, sand-stones and shales) alternating with coal layers, the following main sedimentation environments were distinguished: illite-montmorillonitic (I-M), calcitic (Ct) and coal-forming environment. Applying factor analyses to 16 geochemical parameters, an environmentally- specific early diagenetic connection between the sulphur transformation processes, amount of Corg and precursor material species (C27-C29-steranes) was determined. It was found that the effects of limiting factors on Spyr formation depended on the hydrogeochemical conditions of individual sedimentation environments. Pyrite formation in coals depended directly on participation of higher plant precursor materials and/or on the total sulphur content in the system. In the MS, pyrite formation directly depended on total sulphur content, hydrogeological conditions and the amount of Corg.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Energy Sources, Part A: Recovery, Utilization and Environmental Effects",
title = "Diagenetic relationships between sulphur species and formation of pyrite in coals and sediments",
volume = "29",
number = "16",
pages = "1487-1498",
doi = "10.1080/00908310600626531"
}

Dević, G.,& Pfendt, P. A.. (2007). Diagenetic relationships between sulphur species and formation of pyrite in coals and sediments. in Energy Sources, Part A: Recovery, Utilization and Environmental Effects
Taylor & Francis Inc, Philadelphia., 29(16), 1487-1498.
https://doi.org/10.1080/00908310600626531

Dević G, Pfendt PA. Diagenetic relationships between sulphur species and formation of pyrite in coals and sediments. in Energy Sources, Part A: Recovery, Utilization and Environmental Effects. 2007;29(16):1487-1498.
doi:10.1080/00908310600626531 .

Dević, Gordana, Pfendt, Petar A., "Diagenetic relationships between sulphur species and formation of pyrite in coals and sediments" in Energy Sources, Part A: Recovery, Utilization and Environmental Effects, 29, no. 16 (2007):1487-1498,
https://doi.org/10.1080/00908310600626531 . .

TY  - JOUR
AU  - Jovanović, Vladimir Ž.
AU  - Pfendt, Petar A.
AU  - Jovanović, Anka
PY  - 2007
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4259
AB  - The results of an analysis of the total suspended particles (TSP), total solvent organic extracts (TSOE), and polycyclic aromatic hydrocarbons (PAHs) in aerosol samples collected from the atmosphere of Herceg Novi from 17th June to 15th September in 1998 and 1999 are presented. The TSP and TSOE concentrations were determined by the standard gravimetric method, whereas the PAHs from the organic part of the aerosol were analysed by the GC-MS method. The difference found in the TSP and TSOE contents between the two consecutive years (before and after the bombing of Yugoslavia) was attributed to changes in the intensity and origin of emissions from dominant sources, specific to the summer period of this region. The content and nature of the PAHs identified in the samples of 1998 and 1999 were also different, indicating the significance of traffic as the source of PAHs, which was of significantly lower intensity in 1999 (immediately after the war) due to the lower influx of tourists. Factor analysis showed that the PAH distribution at the measuring site in 1999 was largely determined by meteorological parameters, mainly by the average daily temperature and wind direction. In 1998, the dominant impact on the PAH distribution was attributed to traffic, both local and from a wider region, without an explicit impact of meteorological parameters.
AB  - U radu su prikazani rezultati analize ukupno suspendovanih čestica, ukupno ekstraktabilne
organske supstance i policikličnih aromatičnih ugljovodonika (PAU) u
uzorcima prikupljenim iz atmosfere Herceg Novog u periodu od 17. juna do 15.
septembra 1998. i 1999. godine. Koncentracije suspendovanih čestica i ekstraktibilne
organske supstance određene su standardnom gravimetrijskom metodom, dok su PAU iz
organskog dela aerosola analizirani gasno-masenom spektrometrijon. Postojeća razlika
između sadržaja suspendovanih čestica i ekstraktibilne organske supstance u
analiziranom periodu dve uzastopne godine (pre i neposredno posle bombardovawa)
pripisana je promenama intenziteta i porekla emisija iz dominantnih izvora, specifič
nih za letnji period ovog regiona. Sadržaj i priroda identifikovanih PAU u
uzorcima iz 1998. i 1999. godine su takođe različiti, što je ukazalo na značaj saobrać
aja kao izvora PAU, koji je 1999. godine (neposredno posle rata), usled manjeg
priliva turista, bio znatno slabijeg intenziteta. Rezultati faktorske analize pokazali
su da je distribucija PAU na mernom mestu u 1999. godini bila odredjena
primarno meteoparametrima, pre svega srednjom dnevnom temperaturom i pravcem
vetra, dok je u letnjoj sezoni 1998. godine, dominantan uticaj na raspodelu PAU imao
saobraćaj, kako lokalni, tako i iz šireg regiona, bez eksplicitnog uticaja meteorološ
kih parametara.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Summertime PAH assembly in Mediterranean air: The Herceg Novi sampling station as an example
T1  - Летњи садржај ПАУ у медитеранском ваздуху : мерна станица Херцег Нови као пример
VL  - 72
IS  - 2
SP  - 193
EP  - 204
DO  - 10.2298/JSC0702193J
ER  - 

@article{
author = "Jovanović, Vladimir Ž. and Pfendt, Petar A. and Jovanović, Anka",
year = "2007",
abstract = "The results of an analysis of the total suspended particles (TSP), total solvent organic extracts (TSOE), and polycyclic aromatic hydrocarbons (PAHs) in aerosol samples collected from the atmosphere of Herceg Novi from 17th June to 15th September in 1998 and 1999 are presented. The TSP and TSOE concentrations were determined by the standard gravimetric method, whereas the PAHs from the organic part of the aerosol were analysed by the GC-MS method. The difference found in the TSP and TSOE contents between the two consecutive years (before and after the bombing of Yugoslavia) was attributed to changes in the intensity and origin of emissions from dominant sources, specific to the summer period of this region. The content and nature of the PAHs identified in the samples of 1998 and 1999 were also different, indicating the significance of traffic as the source of PAHs, which was of significantly lower intensity in 1999 (immediately after the war) due to the lower influx of tourists. Factor analysis showed that the PAH distribution at the measuring site in 1999 was largely determined by meteorological parameters, mainly by the average daily temperature and wind direction. In 1998, the dominant impact on the PAH distribution was attributed to traffic, both local and from a wider region, without an explicit impact of meteorological parameters., U radu su prikazani rezultati analize ukupno suspendovanih čestica, ukupno ekstraktabilne
organske supstance i policikličnih aromatičnih ugljovodonika (PAU) u
uzorcima prikupljenim iz atmosfere Herceg Novog u periodu od 17. juna do 15.
septembra 1998. i 1999. godine. Koncentracije suspendovanih čestica i ekstraktibilne
organske supstance određene su standardnom gravimetrijskom metodom, dok su PAU iz
organskog dela aerosola analizirani gasno-masenom spektrometrijon. Postojeća razlika
između sadržaja suspendovanih čestica i ekstraktibilne organske supstance u
analiziranom periodu dve uzastopne godine (pre i neposredno posle bombardovawa)
pripisana je promenama intenziteta i porekla emisija iz dominantnih izvora, specifič
nih za letnji period ovog regiona. Sadržaj i priroda identifikovanih PAU u
uzorcima iz 1998. i 1999. godine su takođe različiti, što je ukazalo na značaj saobrać
aja kao izvora PAU, koji je 1999. godine (neposredno posle rata), usled manjeg
priliva turista, bio znatno slabijeg intenziteta. Rezultati faktorske analize pokazali
su da je distribucija PAU na mernom mestu u 1999. godini bila odredjena
primarno meteoparametrima, pre svega srednjom dnevnom temperaturom i pravcem
vetra, dok je u letnjoj sezoni 1998. godine, dominantan uticaj na raspodelu PAU imao
saobraćaj, kako lokalni, tako i iz šireg regiona, bez eksplicitnog uticaja meteorološ
kih parametara.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Summertime PAH assembly in Mediterranean air: The Herceg Novi sampling station as an example, Летњи садржај ПАУ у медитеранском ваздуху : мерна станица Херцег Нови као пример",
volume = "72",
number = "2",
pages = "193-204",
doi = "10.2298/JSC0702193J"
}

Jovanović, V. Ž., Pfendt, P. A.,& Jovanović, A.. (2007). Summertime PAH assembly in Mediterranean air: The Herceg Novi sampling station as an example. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 72(2), 193-204.
https://doi.org/10.2298/JSC0702193J

Jovanović VŽ, Pfendt PA, Jovanović A. Summertime PAH assembly in Mediterranean air: The Herceg Novi sampling station as an example. in Journal of the Serbian Chemical Society. 2007;72(2):193-204.
doi:10.2298/JSC0702193J .

Jovanović, Vladimir Ž., Pfendt, Petar A., Jovanović, Anka, "Summertime PAH assembly in Mediterranean air: The Herceg Novi sampling station as an example" in Journal of the Serbian Chemical Society, 72, no. 2 (2007):193-204,
https://doi.org/10.2298/JSC0702193J . .

TY  - JOUR
AU  - Topalović, Ana
AU  - Pfendt, Lidija B.
AU  - Perović, Natalija
AU  - Đorđević, Dragana
AU  - Trifunović, Snežana
AU  - Pfendt, Petar A.
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/267
AB  - Phosphorus fractions from three highly calcareous soils (average, 24.9 ± 4.8 %CO3 2-) from sampling sites with a Mediterranean climate were isolated by sequential extraction. In order to provide a more reliable basis for the definition of the obtained P-fractions, principal component analysis was applied and from the chemical characteristics of the 14 investigated soils, those characteristics which define the content and association features of the P-fractions were assessed. The soils are characterized by a relatively high pH (8.0 - 8.2) and by significantly differing contents of organic mater, acid-soluble Mg and total P. These differences affected the various association features of the P-fraction with the soil constituents. The NH4F-P fraction (isolated with 0.5 M NH4F, pH 8.2) is defined by the contents of the main metals of the oxide-hydroxide- clay associations (Al, Fe,Mn) or by the the redox potential (Eh) of Mn. The accumulation of NaOH-phosphorus (extractable with 0.1M NaOH) depended on the constituents of the oxide-hydroxide-clay association, the humic substances and Eh-related factors. In those soils in which NaOH-Pis defined by the oxide-hydroxide-clay association, the participation of Fe as a bridge-forming metal is proposed. The main part of total P, i.e., ∆P = TP - (NH 4F-P + NaOH-P) is defined by the status of Mn- and Fe-humic complexes or by the concentration of hydroxyl-ions.
AB  - Iz tri visoko-krečnjačka zemljišta (prosečni sadržaj CO 3 2- 24.9 ± 4.8%, pH 8.0 - 8.2), sa lokacija sa sredozemnom klimom, izolovane su frakcije fosfora sekvencijalnom ekstrakcijom. U cilju obezbeđivanja pouzdanije osnove za definisanje dobijenih frakcijafosfora (P-frakcija), primenjena je analiza principalne komponente (PC-analiza). Među 14 hemijskih karakteristika zemljišta, izdvojene su one koje definišu sadržaj pojedinih P-frakcija i prirodu njihove asocijacije sa sastojcima zemljišta. Frakcija NH 4-P (izolovana sa 0,5M NH 4F, pH = 8,2) definisana je sadržajem glavnih metala oksidne-hidroksidne-glinene asocijacije (Al, Fe, Mn) ili Eh-statusom izraženim sadržajem Mn. Akumulacija NaOH-P (ekstrahovanog sa 0,1 M NaOH) zavisila je od sastojaka oksidne-hidroksidne-glinene asocijacije, od huminskih supstanci i od faktora koji stoje u vezi sa Eh. U onim zemljištima u kojima je NaOH-P definisana sastojcima oksidne-hidroksidne-glinene asocijacije, pretpostavljeno je vezivanje fosfora preko Fe-mostova. Glavna količina fosfora ∆P = TP - (NH 4F-P + NaOH-P), u pojedinim zemljištima definisana je ili statusom Mn- i Fe-huminskih kompleksa, ili pH-vrednošću.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - The chemical characteristics of soil which determine phosphorus partitioning in highly calcareous soils
T1  - Hemijske karakteristike visoko-krečnjačkih zemljišta koje određuju raspodelu fosfora
VL  - 71
IS  - 11
SP  - 1219
EP  - 1236
DO  - 10.2298/JSC0611219T
ER  - 

@article{
author = "Topalović, Ana and Pfendt, Lidija B. and Perović, Natalija and Đorđević, Dragana and Trifunović, Snežana and Pfendt, Petar A.",
year = "2006",
abstract = "Phosphorus fractions from three highly calcareous soils (average, 24.9 ± 4.8 %CO3 2-) from sampling sites with a Mediterranean climate were isolated by sequential extraction. In order to provide a more reliable basis for the definition of the obtained P-fractions, principal component analysis was applied and from the chemical characteristics of the 14 investigated soils, those characteristics which define the content and association features of the P-fractions were assessed. The soils are characterized by a relatively high pH (8.0 - 8.2) and by significantly differing contents of organic mater, acid-soluble Mg and total P. These differences affected the various association features of the P-fraction with the soil constituents. The NH4F-P fraction (isolated with 0.5 M NH4F, pH 8.2) is defined by the contents of the main metals of the oxide-hydroxide- clay associations (Al, Fe,Mn) or by the the redox potential (Eh) of Mn. The accumulation of NaOH-phosphorus (extractable with 0.1M NaOH) depended on the constituents of the oxide-hydroxide-clay association, the humic substances and Eh-related factors. In those soils in which NaOH-Pis defined by the oxide-hydroxide-clay association, the participation of Fe as a bridge-forming metal is proposed. The main part of total P, i.e., ∆P = TP - (NH 4F-P + NaOH-P) is defined by the status of Mn- and Fe-humic complexes or by the concentration of hydroxyl-ions., Iz tri visoko-krečnjačka zemljišta (prosečni sadržaj CO 3 2- 24.9 ± 4.8%, pH 8.0 - 8.2), sa lokacija sa sredozemnom klimom, izolovane su frakcije fosfora sekvencijalnom ekstrakcijom. U cilju obezbeđivanja pouzdanije osnove za definisanje dobijenih frakcijafosfora (P-frakcija), primenjena je analiza principalne komponente (PC-analiza). Među 14 hemijskih karakteristika zemljišta, izdvojene su one koje definišu sadržaj pojedinih P-frakcija i prirodu njihove asocijacije sa sastojcima zemljišta. Frakcija NH 4-P (izolovana sa 0,5M NH 4F, pH = 8,2) definisana je sadržajem glavnih metala oksidne-hidroksidne-glinene asocijacije (Al, Fe, Mn) ili Eh-statusom izraženim sadržajem Mn. Akumulacija NaOH-P (ekstrahovanog sa 0,1 M NaOH) zavisila je od sastojaka oksidne-hidroksidne-glinene asocijacije, od huminskih supstanci i od faktora koji stoje u vezi sa Eh. U onim zemljištima u kojima je NaOH-P definisana sastojcima oksidne-hidroksidne-glinene asocijacije, pretpostavljeno je vezivanje fosfora preko Fe-mostova. Glavna količina fosfora ∆P = TP - (NH 4F-P + NaOH-P), u pojedinim zemljištima definisana je ili statusom Mn- i Fe-huminskih kompleksa, ili pH-vrednošću.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "The chemical characteristics of soil which determine phosphorus partitioning in highly calcareous soils, Hemijske karakteristike visoko-krečnjačkih zemljišta koje određuju raspodelu fosfora",
volume = "71",
number = "11",
pages = "1219-1236",
doi = "10.2298/JSC0611219T"
}

Topalović, A., Pfendt, L. B., Perović, N., Đorđević, D., Trifunović, S.,& Pfendt, P. A.. (2006). The chemical characteristics of soil which determine phosphorus partitioning in highly calcareous soils. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 71(11), 1219-1236.
https://doi.org/10.2298/JSC0611219T

Topalović A, Pfendt LB, Perović N, Đorđević D, Trifunović S, Pfendt PA. The chemical characteristics of soil which determine phosphorus partitioning in highly calcareous soils. in Journal of the Serbian Chemical Society. 2006;71(11):1219-1236.
doi:10.2298/JSC0611219T .

Topalović, Ana, Pfendt, Lidija B., Perović, Natalija, Đorđević, Dragana, Trifunović, Snežana, Pfendt, Petar A., "The chemical characteristics of soil which determine phosphorus partitioning in highly calcareous soils" in Journal of the Serbian Chemical Society, 71, no. 11 (2006):1219-1236,
https://doi.org/10.2298/JSC0611219T . .

TY  - JOUR
AU  - Mrkić, Sanja
AU  - Pfendt, Petar A.
AU  - Jovančićević, Branimir
AU  - Matić, Ivan D.
AU  - Vujasinović, Slobodan O.
AU  - Babić, Danilo
AU  - Vrvić, Miroslav
AU  - Đorđević, Dragana
AU  - Gojgić-Cvijović, Gordana
AU  - Nikolić, Predrag
AU  - Dević, Gordana
AU  - Matić, Valerija
AU  - Relić, Dubravka
AU  - Trifunović, Snežana
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/219
AB  - The association patterns of xylene and of total phosphorus with sediment constituents in an alluvial aquifer consisting of clays and sands which had been contaminated by a spill of technical grade xylene were investigated with the aim of assessing the dependence of in situ xylene degradation on the P-availability. The investigated alluvial sediments of the Makiš Plain (Sava river alluvion, Quaternary age, Serbia and Montenegro) are relatively poor in P. The most reliable associations were proposed by analyzing the quality of the correlations of xylene- and of P-contents with 32 sediment characteristics. The association patterns depend on the mineralogical and granulometrical composition of sediments, the structural characteristics of the organicmatter (N/C-ratio) and the redox-conditions. Differing association patterns in the clays and the sand had been developed, and these characteristics influence the intrinsic xylene degradation. The main proof for the occurrence of xylene degradation is the percentul share of bacteria which oxidize xylene as a single carbon-source.
AB  - Ispitivani su glineni i peskoviti sedimenti Makiškog polja, zagađeni ksilenom (26-17800μg/kg), s ciljem da se utvrdi uticaj asocijacija ksilen-supstrat odnosno fosfor-supstrat na in situ degradaciju ksilena. Sedimenti Makiškog polja (aluvijalni sedimenti mlađeg Kvartara), imaju relativno nizak sadržaj fosfora. Analiziranjem korelacija ksilena i fosfora sa 32 sastojka sedimenata utvrđeno je da asocijacije ksilena i fosfora zavise od mineraloškog i granulometrijskog sastava sedimenta, strukturnih karakteristika organske supstance i redoks uslova sredine. Fosfor i ksilen u peskovitim i glinenim sedimentima grade različite tipove asocijacija, što se odražava i na degradaciju ksilena. Znatan udeo bakterija koje oksiduju ksilen kao jedini izvor ugljenika predstavlja pouzdan pokazatelj da se u sedimentima odvija degradacija ksilena.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - The influence of the association patterns of phosphorus-substrates and xylene-substrates on the degradation of xylenes in an alluvial aquifer
T1  - Asocijacije ksilen-supstrat odnosno fosfor-supstrat u aluvijalnom akviferu i njihov uticaj na in situ degradaciju ksilena
VL  - 70
IS  - 12
SP  - 1515
EP  - 1531
DO  - 10.2298/JSC0512515M
ER  - 

@article{
author = "Mrkić, Sanja and Pfendt, Petar A. and Jovančićević, Branimir and Matić, Ivan D. and Vujasinović, Slobodan O. and Babić, Danilo and Vrvić, Miroslav and Đorđević, Dragana and Gojgić-Cvijović, Gordana and Nikolić, Predrag and Dević, Gordana and Matić, Valerija and Relić, Dubravka and Trifunović, Snežana",
year = "2005",
abstract = "The association patterns of xylene and of total phosphorus with sediment constituents in an alluvial aquifer consisting of clays and sands which had been contaminated by a spill of technical grade xylene were investigated with the aim of assessing the dependence of in situ xylene degradation on the P-availability. The investigated alluvial sediments of the Makiš Plain (Sava river alluvion, Quaternary age, Serbia and Montenegro) are relatively poor in P. The most reliable associations were proposed by analyzing the quality of the correlations of xylene- and of P-contents with 32 sediment characteristics. The association patterns depend on the mineralogical and granulometrical composition of sediments, the structural characteristics of the organicmatter (N/C-ratio) and the redox-conditions. Differing association patterns in the clays and the sand had been developed, and these characteristics influence the intrinsic xylene degradation. The main proof for the occurrence of xylene degradation is the percentul share of bacteria which oxidize xylene as a single carbon-source., Ispitivani su glineni i peskoviti sedimenti Makiškog polja, zagađeni ksilenom (26-17800μg/kg), s ciljem da se utvrdi uticaj asocijacija ksilen-supstrat odnosno fosfor-supstrat na in situ degradaciju ksilena. Sedimenti Makiškog polja (aluvijalni sedimenti mlađeg Kvartara), imaju relativno nizak sadržaj fosfora. Analiziranjem korelacija ksilena i fosfora sa 32 sastojka sedimenata utvrđeno je da asocijacije ksilena i fosfora zavise od mineraloškog i granulometrijskog sastava sedimenta, strukturnih karakteristika organske supstance i redoks uslova sredine. Fosfor i ksilen u peskovitim i glinenim sedimentima grade različite tipove asocijacija, što se odražava i na degradaciju ksilena. Znatan udeo bakterija koje oksiduju ksilen kao jedini izvor ugljenika predstavlja pouzdan pokazatelj da se u sedimentima odvija degradacija ksilena.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "The influence of the association patterns of phosphorus-substrates and xylene-substrates on the degradation of xylenes in an alluvial aquifer, Asocijacije ksilen-supstrat odnosno fosfor-supstrat u aluvijalnom akviferu i njihov uticaj na in situ degradaciju ksilena",
volume = "70",
number = "12",
pages = "1515-1531",
doi = "10.2298/JSC0512515M"
}

Mrkić, S., Pfendt, P. A., Jovančićević, B., Matić, I. D., Vujasinović, S. O., Babić, D., Vrvić, M., Đorđević, D., Gojgić-Cvijović, G., Nikolić, P., Dević, G., Matić, V., Relić, D.,& Trifunović, S.. (2005). The influence of the association patterns of phosphorus-substrates and xylene-substrates on the degradation of xylenes in an alluvial aquifer. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 70(12), 1515-1531.
https://doi.org/10.2298/JSC0512515M

Mrkić S, Pfendt PA, Jovančićević B, Matić ID, Vujasinović SO, Babić D, Vrvić M, Đorđević D, Gojgić-Cvijović G, Nikolić P, Dević G, Matić V, Relić D, Trifunović S. The influence of the association patterns of phosphorus-substrates and xylene-substrates on the degradation of xylenes in an alluvial aquifer. in Journal of the Serbian Chemical Society. 2005;70(12):1515-1531.
doi:10.2298/JSC0512515M .

Mrkić, Sanja, Pfendt, Petar A., Jovančićević, Branimir, Matić, Ivan D., Vujasinović, Slobodan O., Babić, Danilo, Vrvić, Miroslav, Đorđević, Dragana, Gojgić-Cvijović, Gordana, Nikolić, Predrag, Dević, Gordana, Matić, Valerija, Relić, Dubravka, Trifunović, Snežana, "The influence of the association patterns of phosphorus-substrates and xylene-substrates on the degradation of xylenes in an alluvial aquifer" in Journal of the Serbian Chemical Society, 70, no. 12 (2005):1515-1531,
https://doi.org/10.2298/JSC0512515M . .

TY  - JOUR
AU  - Đorđević, Dragana
AU  - Radmanović, D.
AU  - Mihajlidi Zelić, Aleksandra
AU  - Ilić, Mila
AU  - Pfendt, Petar A.
AU  - Vukmirović, Z.
AU  - Polić, Predrag
PY  - 2004
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/165
AB  - We applied statistical methods to the data of a 5-year sampling period to characterize the features of trace elements in airborne particulate matter at the South Adriatic Coast. The analysis of surface soil samples was also performed. The data were processed by cluster analysis, enrichment factor determination and receptor rose statistics. It is shown that the principal element association consists of Fe, Mn and Ti originating from surface material resuspension. Hg and Se were shown to originate from more complex natural and anthropogenic processes. A strong emission source of Cd and Se was identified in the SSE direction.
PB  - Springer Heidelberg, Heidelberg
T2  - Environmental Chemistry Letters
T1  - Associations of trace elements in aerosol at the South Adriatic Coast
VL  - 2
IS  - 3
SP  - 147
EP  - 150
DO  - 10.1007/s10311-004-0070-y
ER  - 

@article{
author = "Đorđević, Dragana and Radmanović, D. and Mihajlidi Zelić, Aleksandra and Ilić, Mila and Pfendt, Petar A. and Vukmirović, Z. and Polić, Predrag",
year = "2004",
abstract = "We applied statistical methods to the data of a 5-year sampling period to characterize the features of trace elements in airborne particulate matter at the South Adriatic Coast. The analysis of surface soil samples was also performed. The data were processed by cluster analysis, enrichment factor determination and receptor rose statistics. It is shown that the principal element association consists of Fe, Mn and Ti originating from surface material resuspension. Hg and Se were shown to originate from more complex natural and anthropogenic processes. A strong emission source of Cd and Se was identified in the SSE direction.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Environmental Chemistry Letters",
title = "Associations of trace elements in aerosol at the South Adriatic Coast",
volume = "2",
number = "3",
pages = "147-150",
doi = "10.1007/s10311-004-0070-y"
}

Đorđević, D., Radmanović, D., Mihajlidi Zelić, A., Ilić, M., Pfendt, P. A., Vukmirović, Z.,& Polić, P.. (2004). Associations of trace elements in aerosol at the South Adriatic Coast. in Environmental Chemistry Letters
Springer Heidelberg, Heidelberg., 2(3), 147-150.
https://doi.org/10.1007/s10311-004-0070-y

Đorđević D, Radmanović D, Mihajlidi Zelić A, Ilić M, Pfendt PA, Vukmirović Z, Polić P. Associations of trace elements in aerosol at the South Adriatic Coast. in Environmental Chemistry Letters. 2004;2(3):147-150.
doi:10.1007/s10311-004-0070-y .

Đorđević, Dragana, Radmanović, D., Mihajlidi Zelić, Aleksandra, Ilić, Mila, Pfendt, Petar A., Vukmirović, Z., Polić, Predrag, "Associations of trace elements in aerosol at the South Adriatic Coast" in Environmental Chemistry Letters, 2, no. 3 (2004):147-150,
https://doi.org/10.1007/s10311-004-0070-y . .

TY  - JOUR
AU  - Stojanović, Ksenija
AU  - Jovančićević, Branimir
AU  - Pevneva, Galina S.
AU  - Golovko, Julia A.
AU  - Golovko, Anatoly Kuzmich
AU  - Pfendt, Petar A.
PY  - 2001
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4337
AB  - A correlation analysis of maturation parameters was carried out on 14 crude oil samples from nine oil fields on Sakhalin Island (Russia). The oils were taken from reservoir rocks of Miocene age at depths ranging from 73 to 2841 m. On the basis of GC analysis of the alkane fraction (n-alkanes and the isoprenoid alkanes pristane and phytane) as well as on the basis of the abundance of demethylated hopanes (GC-MS analysis, m/z 177), it is assumed that the oils are either biodegraded or are a mixture of biodegraded and nonbiodegraded oils. Therefore, their maturation is assessed on the basis of the distribution and abundance of tricyclic aromatic hydrocarbons that are more resistant to biodegradation than alkane-type biological markers. The oils may be classified into three groups on the basis of the well-established maturation parameter MPI 3: highly mature (group I), moderately mature (group II) and immature (group III). The correlation analysis shows that the percentage of phenanthrene [P] in the tricyclic aromatic fraction of the oils of the Sakhalin oil fields can be used as a maturation parameter. The highly mature oils (group I) were found to have a [P] value of more than 14%; the moderately mature oils (group II) have values of 7-14%, and the immature oils (group III) a value of less than 7%. The very good correlation between MPI 3 and [P] also indicates that parallel to methylphenanthrene isomerization, dealkylation also occurs in the reservoir rocks. By correlation analysis it is shown that these reactions are, to a great extent, determined by the depth of the reservoir rocks.
PB  - Elsevier
T2  - Organic Geochemistry
T1  - Maturity assessment of oils from the Sakhalin oil fields in Russia: Phenanthrene content as a tool
VL  - 32
IS  - 5
SP  - 721
EP  - 731
DO  - 10.1016/S0146-6380(01)00004-3
ER  - 

@article{
author = "Stojanović, Ksenija and Jovančićević, Branimir and Pevneva, Galina S. and Golovko, Julia A. and Golovko, Anatoly Kuzmich and Pfendt, Petar A.",
year = "2001",
abstract = "A correlation analysis of maturation parameters was carried out on 14 crude oil samples from nine oil fields on Sakhalin Island (Russia). The oils were taken from reservoir rocks of Miocene age at depths ranging from 73 to 2841 m. On the basis of GC analysis of the alkane fraction (n-alkanes and the isoprenoid alkanes pristane and phytane) as well as on the basis of the abundance of demethylated hopanes (GC-MS analysis, m/z 177), it is assumed that the oils are either biodegraded or are a mixture of biodegraded and nonbiodegraded oils. Therefore, their maturation is assessed on the basis of the distribution and abundance of tricyclic aromatic hydrocarbons that are more resistant to biodegradation than alkane-type biological markers. The oils may be classified into three groups on the basis of the well-established maturation parameter MPI 3: highly mature (group I), moderately mature (group II) and immature (group III). The correlation analysis shows that the percentage of phenanthrene [P] in the tricyclic aromatic fraction of the oils of the Sakhalin oil fields can be used as a maturation parameter. The highly mature oils (group I) were found to have a [P] value of more than 14%; the moderately mature oils (group II) have values of 7-14%, and the immature oils (group III) a value of less than 7%. The very good correlation between MPI 3 and [P] also indicates that parallel to methylphenanthrene isomerization, dealkylation also occurs in the reservoir rocks. By correlation analysis it is shown that these reactions are, to a great extent, determined by the depth of the reservoir rocks.",
publisher = "Elsevier",
journal = "Organic Geochemistry",
title = "Maturity assessment of oils from the Sakhalin oil fields in Russia: Phenanthrene content as a tool",
volume = "32",
number = "5",
pages = "721-731",
doi = "10.1016/S0146-6380(01)00004-3"
}

Stojanović, K., Jovančićević, B., Pevneva, G. S., Golovko, J. A., Golovko, A. K.,& Pfendt, P. A.. (2001). Maturity assessment of oils from the Sakhalin oil fields in Russia: Phenanthrene content as a tool. in Organic Geochemistry
Elsevier., 32(5), 721-731.
https://doi.org/10.1016/S0146-6380(01)00004-3

Stojanović K, Jovančićević B, Pevneva GS, Golovko JA, Golovko AK, Pfendt PA. Maturity assessment of oils from the Sakhalin oil fields in Russia: Phenanthrene content as a tool. in Organic Geochemistry. 2001;32(5):721-731.
doi:10.1016/S0146-6380(01)00004-3 .

Stojanović, Ksenija, Jovančićević, Branimir, Pevneva, Galina S., Golovko, Julia A., Golovko, Anatoly Kuzmich, Pfendt, Petar A., "Maturity assessment of oils from the Sakhalin oil fields in Russia: Phenanthrene content as a tool" in Organic Geochemistry, 32, no. 5 (2001):721-731,
https://doi.org/10.1016/S0146-6380(01)00004-3 . .

TY  - JOUR
AU  - Miodragović, Zoran
AU  - Jokić, Aleksandar M.
AU  - Pfendt, Petar A.
PY  - 1992
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4737
AB  - Fulvic acids (FAs) from the whole Quaternary sequence (to a depth of 26 m) of the alluvial sediment of the Sava river (taken from a site in Novi Beograd, Belgrade, Yugoslavia) were investigated with the aim of examining the effect of the environment (clay or sand) on their characteristics. Characterization of the FAs was carried out by correlating the results obtained by various instrumental techniques (u.v.-vis. and i.r. spectroscopy, fluorimetry). Differences were noticed between the FAs, depending on whether they originated from sand or clay, which indicates that the hydrogeological environment represents an important factor in determining their characteristics, though the role of the precursor material may be significant. FAs found in clay layers are less aliphatic, have a greater non-aliphatic hydroxyl group content and exhibit more similar fluorescence ntensities compared to FAs originating from sand. The greater mutual similarities of the clay FAs in comparison to those from sands is a result of diagenesis occurring in a more "closed" system.
PB  - Elsevier
T2  - Organic Geochemistry
T1  - Fulvic acid characterization in an alluvial sediment sequence: differences between clay and sand environments
VL  - 18
IS  - 4
SP  - 481
EP  - 487
DO  - 10.1016/0146-6380(92)90111-A
ER  - 

@article{
author = "Miodragović, Zoran and Jokić, Aleksandar M. and Pfendt, Petar A.",
year = "1992",
abstract = "Fulvic acids (FAs) from the whole Quaternary sequence (to a depth of 26 m) of the alluvial sediment of the Sava river (taken from a site in Novi Beograd, Belgrade, Yugoslavia) were investigated with the aim of examining the effect of the environment (clay or sand) on their characteristics. Characterization of the FAs was carried out by correlating the results obtained by various instrumental techniques (u.v.-vis. and i.r. spectroscopy, fluorimetry). Differences were noticed between the FAs, depending on whether they originated from sand or clay, which indicates that the hydrogeological environment represents an important factor in determining their characteristics, though the role of the precursor material may be significant. FAs found in clay layers are less aliphatic, have a greater non-aliphatic hydroxyl group content and exhibit more similar fluorescence ntensities compared to FAs originating from sand. The greater mutual similarities of the clay FAs in comparison to those from sands is a result of diagenesis occurring in a more "closed" system.",
publisher = "Elsevier",
journal = "Organic Geochemistry",
title = "Fulvic acid characterization in an alluvial sediment sequence: differences between clay and sand environments",
volume = "18",
number = "4",
pages = "481-487",
doi = "10.1016/0146-6380(92)90111-A"
}

Miodragović, Z., Jokić, A. M.,& Pfendt, P. A.. (1992). Fulvic acid characterization in an alluvial sediment sequence: differences between clay and sand environments. in Organic Geochemistry
Elsevier., 18(4), 481-487.
https://doi.org/10.1016/0146-6380(92)90111-A

Miodragović Z, Jokić AM, Pfendt PA. Fulvic acid characterization in an alluvial sediment sequence: differences between clay and sand environments. in Organic Geochemistry. 1992;18(4):481-487.
doi:10.1016/0146-6380(92)90111-A .

Miodragović, Zoran, Jokić, Aleksandar M., Pfendt, Petar A., "Fulvic acid characterization in an alluvial sediment sequence: differences between clay and sand environments" in Organic Geochemistry, 18, no. 4 (1992):481-487,
https://doi.org/10.1016/0146-6380(92)90111-A . .

TY  - JOUR
AU  - Pfendt, Petar A.
AU  - Polić, Predrag
AU  - Krsmanović, V. D.
AU  - Vitorović, Dragomir K.
PY  - 1990
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4736
AB  - An attempt was made to distinguish metal-organic matter interactions in two types of sulfate-reducing environments, mild (MR) and strong sulfate-reducing (SR), in the Aleksinac oil shale deposit (Oligocene-Miocene). Samples from the MR group show (all differences are statistically highly significant): lower organic matter content, compared with the SR group, higher O/C and N/C ratios (0.147 ± 0.054 and 0.041 ± 0.014, respectively, compared with 0.125 ± 0.031 and 0.035 ± 0.008, respectively, in the SR group), and higher Cu, Zn, Pb, Cr, Mo and Co contents than in the SR group. Statistically significant correlations between metals, the N/C and the SiO2/Al2O3 ratio in the MR group only, represent a record of highly interdependent processes of organic-metal-silicate interactions which had been occurring in the mild sulfate-reducing conditions during oil shale formation.
PB  - Elsevier
T2  - Organic Geochemistry
T1  - Metal-organic matter interactions in the formation of an oil shale deposit
VL  - 16
IS  - 1-3
SP  - 621
EP  - 629
DO  - 10.1016/0146-6380(90)90075-B
ER  - 

@article{
author = "Pfendt, Petar A. and Polić, Predrag and Krsmanović, V. D. and Vitorović, Dragomir K.",
year = "1990",
abstract = "An attempt was made to distinguish metal-organic matter interactions in two types of sulfate-reducing environments, mild (MR) and strong sulfate-reducing (SR), in the Aleksinac oil shale deposit (Oligocene-Miocene). Samples from the MR group show (all differences are statistically highly significant): lower organic matter content, compared with the SR group, higher O/C and N/C ratios (0.147 ± 0.054 and 0.041 ± 0.014, respectively, compared with 0.125 ± 0.031 and 0.035 ± 0.008, respectively, in the SR group), and higher Cu, Zn, Pb, Cr, Mo and Co contents than in the SR group. Statistically significant correlations between metals, the N/C and the SiO2/Al2O3 ratio in the MR group only, represent a record of highly interdependent processes of organic-metal-silicate interactions which had been occurring in the mild sulfate-reducing conditions during oil shale formation.",
publisher = "Elsevier",
journal = "Organic Geochemistry",
title = "Metal-organic matter interactions in the formation of an oil shale deposit",
volume = "16",
number = "1-3",
pages = "621-629",
doi = "10.1016/0146-6380(90)90075-B"
}

Pfendt, P. A., Polić, P., Krsmanović, V. D.,& Vitorović, D. K.. (1990). Metal-organic matter interactions in the formation of an oil shale deposit. in Organic Geochemistry
Elsevier., 16(1-3), 621-629.
https://doi.org/10.1016/0146-6380(90)90075-B

Pfendt PA, Polić P, Krsmanović VD, Vitorović DK. Metal-organic matter interactions in the formation of an oil shale deposit. in Organic Geochemistry. 1990;16(1-3):621-629.
doi:10.1016/0146-6380(90)90075-B .

Pfendt, Petar A., Polić, Predrag, Krsmanović, V. D., Vitorović, Dragomir K., "Metal-organic matter interactions in the formation of an oil shale deposit" in Organic Geochemistry, 16, no. 1-3 (1990):621-629,
https://doi.org/10.1016/0146-6380(90)90075-B . .

TY  - JOUR
AU  - Vitorović, Dragomir K.
AU  - Krsmanović, V. D.
AU  - Pfendt, Petar A.
PY  - 1980
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4408
AB  - Two oxidizing agents were used for structural studies of the kerogen from Aleksinac shale (Yugoslavia), namely: (1) alkaline potassium permanganate, and (2) acidic ferric chloride. (1) The main goal with alkaline permanganate was to obtain optimum yields of identifiable oxidation products with preserved kerogen structural characteristics. In order to find optimal conditions, experiments were carried out at various temperatures (20-100°C) with varying amounts of permanganate per step. The best total yield of isolable degradation products (92,25%) was obtained at 75°C. At the same reaction temperature the best yield of ether-soluble acids was obtained (39% of the total organic matter). Kerogen degradation products obtained in high yields provide a better basis for more reliable structural interpretations than the products obtained in minor yields, which may represent small undefined portions of the original kerogen. (2) Ferric chloride is an oxidant of relatively high oxidation potential, although it is more gentle and more specific (e.g., dehydrogenation and decarboxylation) than most oxidation reagents containing oxygen used in kerogen structural studies. In oxidation of the Aleksinac shale kerogen concentrate with acidic ferric chloride solution, the pyrite content decreased (38-75%), and the kerogen content increased (7-15%). A small portion of the kerogen (∼8%) was degraded into soluble products. The chemical nature of the kerogen was considerably changed. In addition to a decrease in the atomic H C ratio and an increase in the O C ratio, changes in the content of aliphatic, aromatic, carbonyl and quinoid structures were observed.
PB  - Elsevier
T2  - Physics and Chemistry of the Earth
T1  - Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride
VL  - 12
IS  - C
SP  - 585
EP  - 589
DO  - 10.1016/0079-1946(79)90140-X
ER  - 

@article{
author = "Vitorović, Dragomir K. and Krsmanović, V. D. and Pfendt, Petar A.",
year = "1980",
abstract = "Two oxidizing agents were used for structural studies of the kerogen from Aleksinac shale (Yugoslavia), namely: (1) alkaline potassium permanganate, and (2) acidic ferric chloride. (1) The main goal with alkaline permanganate was to obtain optimum yields of identifiable oxidation products with preserved kerogen structural characteristics. In order to find optimal conditions, experiments were carried out at various temperatures (20-100°C) with varying amounts of permanganate per step. The best total yield of isolable degradation products (92,25%) was obtained at 75°C. At the same reaction temperature the best yield of ether-soluble acids was obtained (39% of the total organic matter). Kerogen degradation products obtained in high yields provide a better basis for more reliable structural interpretations than the products obtained in minor yields, which may represent small undefined portions of the original kerogen. (2) Ferric chloride is an oxidant of relatively high oxidation potential, although it is more gentle and more specific (e.g., dehydrogenation and decarboxylation) than most oxidation reagents containing oxygen used in kerogen structural studies. In oxidation of the Aleksinac shale kerogen concentrate with acidic ferric chloride solution, the pyrite content decreased (38-75%), and the kerogen content increased (7-15%). A small portion of the kerogen (∼8%) was degraded into soluble products. The chemical nature of the kerogen was considerably changed. In addition to a decrease in the atomic H C ratio and an increase in the O C ratio, changes in the content of aliphatic, aromatic, carbonyl and quinoid structures were observed.",
publisher = "Elsevier",
journal = "Physics and Chemistry of the Earth",
title = "Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride",
volume = "12",
number = "C",
pages = "585-589",
doi = "10.1016/0079-1946(79)90140-X"
}

Vitorović, D. K., Krsmanović, V. D.,& Pfendt, P. A.. (1980). Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride. in Physics and Chemistry of the Earth
Elsevier., 12(C), 585-589.
https://doi.org/10.1016/0079-1946(79)90140-X

Vitorović DK, Krsmanović VD, Pfendt PA. Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride. in Physics and Chemistry of the Earth. 1980;12(C):585-589.
doi:10.1016/0079-1946(79)90140-X .

Vitorović, Dragomir K., Krsmanović, V. D., Pfendt, Petar A., "Kerogen structural studies-oxidations with alkaline permanganate and with ferric chloride" in Physics and Chemistry of the Earth, 12, no. C (1980):585-589,
https://doi.org/10.1016/0079-1946(79)90140-X . .