TY  - JOUR
AU  - Relić, Dubravka
AU  - Đorđević, Dragana
AU  - Popović, Aleksandar R.
AU  - Jadranin, Milka
AU  - Polić, Predrag
PY  - 2010
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/674
AB  - Thirty-five alluvial sediments of the River Danube and 12 groundwater samples were taken within the Panevo Oil Refinery (Serbia). The results for groundwater samples exceed European primary drinking water standards for Fe (obtained results, > 200 mu g/l) and Mn (obtained results, > 50 mu g/l), while the levels of the trace metals are below the thresholds for drinking water quality. Sediments were treated by sequential extraction procedure with five different solutions, each having a higher extraction capacity than the previous one. We also wanted to determine the possible relationships among trace metals and between sediment properties and elemental concentrations. These solutions partitioned metals into CH(3)COONH(4) extractable (F1); HCl carbonate extractable and NH(2)OH center dot HCl easily reducible (F2); (NH(4))(2)C(2)O(4)/H(2)C(2)O(4) moderately reducible (F3); H(2)O(2)-HNO(3) organic/sulfide extractable fractions (F4); and HCl acid-soluble residue (F5). The sum of trace metals Ni, Pb, Cu, and Zn associated with the first two fractions (exchangeable, carbonate, and easily reducible) is significant and extremely important because it represents the proportion of heavy metals that can be easily remobilized by changes in environmental conditions such as pH, redox potential, salinity, etc. Sediments located nearer the groundwater flow are exposed to stronger groundwater fluctuation and had a higher quantity of amorphous and less stable substrates of trace metals. Principal component analysis was used to understand and visualize the associations between the trace metals and certain geological forms within analyzed sediments. The observed association between Cr with total sulfur and Mn from the acid-soluble residue could indicate that Cr is in the form of reduced, less toxic Cr(III), which is from the ecochemical point of view very important.
PB  - Springer, Dordrecht
T2  - Environmental Monitoring and Assessment
T1  - Fractionation and potential mobility of trace metals in Danube alluvial aquifer within an industrialized zone
VL  - 171
IS  - 1-4
SP  - 229
EP  - 248
DO  - 10.1007/s10661-009-1274-1
ER  - 

@article{
author = "Relić, Dubravka and Đorđević, Dragana and Popović, Aleksandar R. and Jadranin, Milka and Polić, Predrag",
year = "2010",
abstract = "Thirty-five alluvial sediments of the River Danube and 12 groundwater samples were taken within the Panevo Oil Refinery (Serbia). The results for groundwater samples exceed European primary drinking water standards for Fe (obtained results, > 200 mu g/l) and Mn (obtained results, > 50 mu g/l), while the levels of the trace metals are below the thresholds for drinking water quality. Sediments were treated by sequential extraction procedure with five different solutions, each having a higher extraction capacity than the previous one. We also wanted to determine the possible relationships among trace metals and between sediment properties and elemental concentrations. These solutions partitioned metals into CH(3)COONH(4) extractable (F1); HCl carbonate extractable and NH(2)OH center dot HCl easily reducible (F2); (NH(4))(2)C(2)O(4)/H(2)C(2)O(4) moderately reducible (F3); H(2)O(2)-HNO(3) organic/sulfide extractable fractions (F4); and HCl acid-soluble residue (F5). The sum of trace metals Ni, Pb, Cu, and Zn associated with the first two fractions (exchangeable, carbonate, and easily reducible) is significant and extremely important because it represents the proportion of heavy metals that can be easily remobilized by changes in environmental conditions such as pH, redox potential, salinity, etc. Sediments located nearer the groundwater flow are exposed to stronger groundwater fluctuation and had a higher quantity of amorphous and less stable substrates of trace metals. Principal component analysis was used to understand and visualize the associations between the trace metals and certain geological forms within analyzed sediments. The observed association between Cr with total sulfur and Mn from the acid-soluble residue could indicate that Cr is in the form of reduced, less toxic Cr(III), which is from the ecochemical point of view very important.",
publisher = "Springer, Dordrecht",
journal = "Environmental Monitoring and Assessment",
title = "Fractionation and potential mobility of trace metals in Danube alluvial aquifer within an industrialized zone",
volume = "171",
number = "1-4",
pages = "229-248",
doi = "10.1007/s10661-009-1274-1"
}

Relić, D., Đorđević, D., Popović, A. R., Jadranin, M.,& Polić, P.. (2010). Fractionation and potential mobility of trace metals in Danube alluvial aquifer within an industrialized zone. in Environmental Monitoring and Assessment
Springer, Dordrecht., 171(1-4), 229-248.
https://doi.org/10.1007/s10661-009-1274-1

Relić D, Đorđević D, Popović AR, Jadranin M, Polić P. Fractionation and potential mobility of trace metals in Danube alluvial aquifer within an industrialized zone. in Environmental Monitoring and Assessment. 2010;171(1-4):229-248.
doi:10.1007/s10661-009-1274-1 .

Relić, Dubravka, Đorđević, Dragana, Popović, Aleksandar R., Jadranin, Milka, Polić, Predrag, "Fractionation and potential mobility of trace metals in Danube alluvial aquifer within an industrialized zone" in Environmental Monitoring and Assessment, 171, no. 1-4 (2010):229-248,
https://doi.org/10.1007/s10661-009-1274-1 . .

TY  - JOUR
AU  - Sakan, Sanja
AU  - Đorđević, Dragana
AU  - Manojlović, Dragan
AU  - Polić, Predrag
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/512
AB  - In this study we have worked on the evaluation of heavy metal contamination in the sediments taken from the Tisza River and its tributaries, and thereby used the sequential extraction method, geochemical normalization, the calculation of the enrichment factor (EF), and the methods of statistical analysis. The chemical fractionation of Ni, Cu, Zn, Cr, Pb, Fe, and Mn, carried out by using the modified Tessier method, points to different substrates and binding mechanisms of Cu, Zn and Pb in sediments of the tributaries and sediments of the Tisza River. The similarities in the distributions of Fe and Ni in all types of sediments are the result of geochemical similarity as well as of the fact that natural sources mainly affect the concentration levels of these elements. The calculated enrichment factors (EF, measured metal vs. background concentrations) indicated that metal contamination (Cu, Pb, Zn and Cr) was recorded in the sediments of the Tisza River, while no indications of pollution were detected in the tributaries of the Tisza River and the surrounding pools. The maximum values of the EF were close to 6 for Cu and Pb (moderately severe enrichment) and close to 4.5 for Zn (indicating moderate enrichment). It can be said that the Tisza River is slightly to moderately severely polluted with Cu, Zn, and Pb, and minorly polluted with Cr. It is concluded that sediments of the Tisza serve as a repository for heavy metal accumulation from adjacent urban and industrial areas.
PB  - Academic Press Ltd- Elsevier Science Ltd, London
T2  - Journal of Environmental Management
T1  - Assessment of heavy metal pollutants accumulation in the Tisza river sediments
VL  - 90
IS  - 11
SP  - 3382
EP  - 3390
DO  - 10.1016/j.jenvman.2009.05.013
ER  - 

@article{
author = "Sakan, Sanja and Đorđević, Dragana and Manojlović, Dragan and Polić, Predrag",
year = "2009",
abstract = "In this study we have worked on the evaluation of heavy metal contamination in the sediments taken from the Tisza River and its tributaries, and thereby used the sequential extraction method, geochemical normalization, the calculation of the enrichment factor (EF), and the methods of statistical analysis. The chemical fractionation of Ni, Cu, Zn, Cr, Pb, Fe, and Mn, carried out by using the modified Tessier method, points to different substrates and binding mechanisms of Cu, Zn and Pb in sediments of the tributaries and sediments of the Tisza River. The similarities in the distributions of Fe and Ni in all types of sediments are the result of geochemical similarity as well as of the fact that natural sources mainly affect the concentration levels of these elements. The calculated enrichment factors (EF, measured metal vs. background concentrations) indicated that metal contamination (Cu, Pb, Zn and Cr) was recorded in the sediments of the Tisza River, while no indications of pollution were detected in the tributaries of the Tisza River and the surrounding pools. The maximum values of the EF were close to 6 for Cu and Pb (moderately severe enrichment) and close to 4.5 for Zn (indicating moderate enrichment). It can be said that the Tisza River is slightly to moderately severely polluted with Cu, Zn, and Pb, and minorly polluted with Cr. It is concluded that sediments of the Tisza serve as a repository for heavy metal accumulation from adjacent urban and industrial areas.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Environmental Management",
title = "Assessment of heavy metal pollutants accumulation in the Tisza river sediments",
volume = "90",
number = "11",
pages = "3382-3390",
doi = "10.1016/j.jenvman.2009.05.013"
}

Sakan, S., Đorđević, D., Manojlović, D.,& Polić, P.. (2009). Assessment of heavy metal pollutants accumulation in the Tisza river sediments. in Journal of Environmental Management
Academic Press Ltd- Elsevier Science Ltd, London., 90(11), 3382-3390.
https://doi.org/10.1016/j.jenvman.2009.05.013

Sakan S, Đorđević D, Manojlović D, Polić P. Assessment of heavy metal pollutants accumulation in the Tisza river sediments. in Journal of Environmental Management. 2009;90(11):3382-3390.
doi:10.1016/j.jenvman.2009.05.013 .

Sakan, Sanja, Đorđević, Dragana, Manojlović, Dragan, Polić, Predrag, "Assessment of heavy metal pollutants accumulation in the Tisza river sediments" in Journal of Environmental Management, 90, no. 11 (2009):3382-3390,
https://doi.org/10.1016/j.jenvman.2009.05.013 . .

TY  - CHAP
AU  - Popović, Aleksandar R.
AU  - Radmanovic, D.
AU  - Đorđević, Dragana
AU  - Polić, Predrag
PY  - 2005
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/220
AB  - Coal ash obtained by coal combustion in the "Nikola Tesla A" power plant in Obrenovac near Belgrade (Serbia) is suspended in river water then carried by a pipeline to a dump. In order to predict the leachability and possible environmental impact of selected elements due to ionic strength of river water, we extracted coal ash with distilled water and 0.002 M-2 M solutions of KNO3. The results show that changes in river water ionic strength could significantly influence pollution by calcium, chromium and manganese ions, but not by zinc, nickel and copper ions. In the case of lead, magnesium, arsenic and iron ions it is difficult to predict the effects of ionic strength on pollution processes in the vicinity of the dump. Further, pollution by cadmium ions is unlikely because extractable cadmium is not detectable within the applied ionic strength range.
PB  - Springer Berlin Heidelberg
T2  - Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems
T1  - Leaching of selected elements from coal ash dumping
SP  - 145
EP  - 151
DO  - 10.1007/3-540-26531-7_14
ER  - 

@inbook{
author = "Popović, Aleksandar R. and Radmanovic, D. and Đorđević, Dragana and Polić, Predrag",
year = "2005",
abstract = "Coal ash obtained by coal combustion in the "Nikola Tesla A" power plant in Obrenovac near Belgrade (Serbia) is suspended in river water then carried by a pipeline to a dump. In order to predict the leachability and possible environmental impact of selected elements due to ionic strength of river water, we extracted coal ash with distilled water and 0.002 M-2 M solutions of KNO3. The results show that changes in river water ionic strength could significantly influence pollution by calcium, chromium and manganese ions, but not by zinc, nickel and copper ions. In the case of lead, magnesium, arsenic and iron ions it is difficult to predict the effects of ionic strength on pollution processes in the vicinity of the dump. Further, pollution by cadmium ions is unlikely because extractable cadmium is not detectable within the applied ionic strength range.",
publisher = "Springer Berlin Heidelberg",
journal = "Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems",
booktitle = "Leaching of selected elements from coal ash dumping",
pages = "145-151",
doi = "10.1007/3-540-26531-7_14"
}

Popović, A. R., Radmanovic, D., Đorđević, D.,& Polić, P.. (2005). Leaching of selected elements from coal ash dumping. in Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems
Springer Berlin Heidelberg., 145-151.
https://doi.org/10.1007/3-540-26531-7_14

Popović AR, Radmanovic D, Đorđević D, Polić P. Leaching of selected elements from coal ash dumping. in Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems. 2005;:145-151.
doi:10.1007/3-540-26531-7_14 .

Popović, Aleksandar R., Radmanovic, D., Đorđević, Dragana, Polić, Predrag, "Leaching of selected elements from coal ash dumping" in Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems (2005):145-151,
https://doi.org/10.1007/3-540-26531-7_14 . .

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  - Popović, Aleksandar R.
AU  - Đorđević, Dragana
AU  - Polić, Predrag
PY  - 2001
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3897
AB  - Coal ash obtained by coal combustion in the “Nikola Tesla A” power plant in Obrenovac, near Belgrade, Yugoslavia, is mixed with water of the Sava river and transported to the dump. In order to assess pollution caused by leaching of some minor and major elements during ash transport through the pipeline, two sets of samples (six samples each) were subjected to a modified sequential extraction. The first set consisted of coal ash samples taken immediately after combustion, while the second set was obtained by extraction with river water, imitating the processes that occur in the pipeline. Samples were extracted consecutively with distilled water and a 1 M solution of KCl, pH 7, and the differences in extractability were compared in order to predict potential pollution. Considering concentrations of seven trace elements as well as five major elements in extracts from a total of 12 samples, it can be concluded that lead and cadmium do not present an environmental threat during and immediately after ash transport to the dump. Portions of zinc, nickel and chromium are released during the ash transport, and arsenic and manganese are released continuously. Copper and iron do not present an environmental threat due to element leaching during and immediately after the coal ash suspension and transport. On the contrary, these elements, as well as chromium, become concentrated during coal ash transport. Adsorbed portions of calcium, magnesium and potassium are also leached during coal ash transport.
PB  - Elsevier
T2  - Environment International
T1  - Trace and major element pollution originating from coal ash suspension and transport processes
VL  - 26
IS  - 4
SP  - 251
EP  - 255
DO  - 10.1016/S0160-4120(00)00114-8
ER  - 

@article{
author = "Popović, Aleksandar R. and Đorđević, Dragana and Polić, Predrag",
year = "2001",
abstract = "Coal ash obtained by coal combustion in the “Nikola Tesla A” power plant in Obrenovac, near Belgrade, Yugoslavia, is mixed with water of the Sava river and transported to the dump. In order to assess pollution caused by leaching of some minor and major elements during ash transport through the pipeline, two sets of samples (six samples each) were subjected to a modified sequential extraction. The first set consisted of coal ash samples taken immediately after combustion, while the second set was obtained by extraction with river water, imitating the processes that occur in the pipeline. Samples were extracted consecutively with distilled water and a 1 M solution of KCl, pH 7, and the differences in extractability were compared in order to predict potential pollution. Considering concentrations of seven trace elements as well as five major elements in extracts from a total of 12 samples, it can be concluded that lead and cadmium do not present an environmental threat during and immediately after ash transport to the dump. Portions of zinc, nickel and chromium are released during the ash transport, and arsenic and manganese are released continuously. Copper and iron do not present an environmental threat due to element leaching during and immediately after the coal ash suspension and transport. On the contrary, these elements, as well as chromium, become concentrated during coal ash transport. Adsorbed portions of calcium, magnesium and potassium are also leached during coal ash transport.",
publisher = "Elsevier",
journal = "Environment International",
title = "Trace and major element pollution originating from coal ash suspension and transport processes",
volume = "26",
number = "4",
pages = "251-255",
doi = "10.1016/S0160-4120(00)00114-8"
}

Popović, A. R., Đorđević, D.,& Polić, P.. (2001). Trace and major element pollution originating from coal ash suspension and transport processes. in Environment International
Elsevier., 26(4), 251-255.
https://doi.org/10.1016/S0160-4120(00)00114-8

Popović AR, Đorđević D, Polić P. Trace and major element pollution originating from coal ash suspension and transport processes. in Environment International. 2001;26(4):251-255.
doi:10.1016/S0160-4120(00)00114-8 .

Popović, Aleksandar R., Đorđević, Dragana, Polić, Predrag, "Trace and major element pollution originating from coal ash suspension and transport processes" in Environment International, 26, no. 4 (2001):251-255,
https://doi.org/10.1016/S0160-4120(00)00114-8 . .

TY  - JOUR
AU  - Todorović, Zoran
AU  - Polić, Predrag
AU  - Đorđević, Dragana
AU  - Antonijević, S.
PY  - 2001
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/38
AB  - The lead concentrations in the water of the "Barje" lake are presented for the years 1995 to 1998. Sequential extraction was applied to estimate the chemical association of lead in the sediments of the "Barje" lake. Several lead fractions showed highly significant correlations with the corresponding substrate (step II: Mn-oxyhydroxides; step III: Fe-oxyhydroxides) suggesting that lead carbonates were incorporated with amorphous iron and manganese hydroxides. An explanation for this relation can be in the same anthropogenic source of these elements.
AB  - Predstavljena je koncentracija olova za jezero "Barje" od 1995 do 1998. godine. Sekvenciona ekstrakcija je primenjena za proučavanje hemijskih asocijacija olova u sedimentima jezera "Barje". Visoko signifikantne korelacije pojedinih frakcija olova sa odgovarajućim supstratima (druga faza: Mn oksihidroksidima; treća faza: Fe oksihidroksidima) pokazuje da su olovo-karbonati inkorporirani sa amorfnim hidroksidima gvožđa i mangana. Objašnjenje se može potražiti u istom antropogenijskom izvoru.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Lead distribution in water and its association with sediment constituents of the "Barje" lake (Leskovac, Yugoslavia)
T1  - Raspodela olova u vodi i njegova asocijacija sa elementima u sedimentu jezera "Barje" (Leskovac, Jugoslavija)
VL  - 66
IS  - 10
SP  - 697
EP  - 708
UR  - https://hdl.handle.net/21.15107/rcub_cer_38
ER  - 

@article{
author = "Todorović, Zoran and Polić, Predrag and Đorđević, Dragana and Antonijević, S.",
year = "2001",
abstract = "The lead concentrations in the water of the "Barje" lake are presented for the years 1995 to 1998. Sequential extraction was applied to estimate the chemical association of lead in the sediments of the "Barje" lake. Several lead fractions showed highly significant correlations with the corresponding substrate (step II: Mn-oxyhydroxides; step III: Fe-oxyhydroxides) suggesting that lead carbonates were incorporated with amorphous iron and manganese hydroxides. An explanation for this relation can be in the same anthropogenic source of these elements., Predstavljena je koncentracija olova za jezero "Barje" od 1995 do 1998. godine. Sekvenciona ekstrakcija je primenjena za proučavanje hemijskih asocijacija olova u sedimentima jezera "Barje". Visoko signifikantne korelacije pojedinih frakcija olova sa odgovarajućim supstratima (druga faza: Mn oksihidroksidima; treća faza: Fe oksihidroksidima) pokazuje da su olovo-karbonati inkorporirani sa amorfnim hidroksidima gvožđa i mangana. Objašnjenje se može potražiti u istom antropogenijskom izvoru.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Lead distribution in water and its association with sediment constituents of the "Barje" lake (Leskovac, Yugoslavia), Raspodela olova u vodi i njegova asocijacija sa elementima u sedimentu jezera "Barje" (Leskovac, Jugoslavija)",
volume = "66",
number = "10",
pages = "697-708",
url = "https://hdl.handle.net/21.15107/rcub_cer_38"
}

Todorović, Z., Polić, P., Đorđević, D.,& Antonijević, S.. (2001). Lead distribution in water and its association with sediment constituents of the "Barje" lake (Leskovac, Yugoslavia). in Journal of the Serbian Chemical Society
Serbian Chemical Society., 66(10), 697-708.
https://hdl.handle.net/21.15107/rcub_cer_38

Todorović Z, Polić P, Đorđević D, Antonijević S. Lead distribution in water and its association with sediment constituents of the "Barje" lake (Leskovac, Yugoslavia). in Journal of the Serbian Chemical Society. 2001;66(10):697-708.
https://hdl.handle.net/21.15107/rcub_cer_38 .

Todorović, Zoran, Polić, Predrag, Đorđević, Dragana, Antonijević, S., "Lead distribution in water and its association with sediment constituents of the "Barje" lake (Leskovac, Yugoslavia)" in Journal of the Serbian Chemical Society, 66, no. 10 (2001):697-708,
https://hdl.handle.net/21.15107/rcub_cer_38 .

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 . .