TY  - CONF
AU  - Šolević Knudsen, Tatjana
AU  - Ilić, Mila
AU  - Milić, Jelena
AU  - Avdalović, Jelena
AU  - Bulatović, Sandra
AU  - Marić, Nenad
AU  - Vrvić, Miroslav
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6770
AB  - The aim of this study was to investigate the environmental risk from the gasoline range volatile
organic contaminants in the Sava river aquifer. The investigated area is located in New
Belgrade, in the vicinity of the largest heating plant in Belgrade, the capital of Serbia. Our
previous research on the oil pollutants in the groundwater at this locality was focused on the
origin and spatial distribution of these contaminants, and estimation of potential human
health risks from exposure to these compounds. [1] The purpose of our present study is a Tier
I Environmental risk assessment in this part of the aquifer.
Groundwater samples were collected from 28 hydrogeological boreholes. Preliminary
analyses of the organic compounds extracted from the groundwater samples were conducted
by gas chromatography with flame ionization detection (GC-FID), and by gas chromatography
– mass spectrometry (GC-MS). Volatile organic compounds (VOCs) were analyzed and
identified by headspace gas chromatography – mass spectrometry. Chemicals of concern were
quantified by headspace gas chromatography with flame ionization detection (HS-GC-FID).
In the groundwater samples analyzed, the most frequently detected VOCs were from the
group of the gasoline range organics. Concentrations of the individual VOCs ranged from
below detection limits to 5.2 mg/L. For each of the compounds quantified, the Risk Quotient
(RQ) was calculated as the ratio of the measured concentration of that compound in the
groundwater sample and the lowest Predicted Non-Effect Concentration for freshwater
aquatic organisms (PNEC). The PNEC values were adopted from the European chemicals
agency’s (ECHA) Registration Dossier database. [2] At some of the sampling points, the
detected concentrations of VOCs were higher than that of the PNEC values with resulting RQ
> 1. Considering the fact that the VOC compounds analyzed were present as mixtures, the
mixture RQ was calculated (as a sum of the individual RQs) for each sampling point. Out of 28
sampling points, at 7 of them the mixture RQs were higher than 1 which indicates a potentially
medium to high ecological risk from these compounds in this part of the aquifer.
In addition to the conclusion from our previous study on the human risk assessment from
exposure to the volatile organic compounds in the groundwater at this location, [1] this
research emphasizes a necessity for a continuous monitoring of the water quality in the
investigated area.
PB  - Croatian Society of Chemical Engineers
C3  - Book of Abstracts - 28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI), March 28-31, 2023, Rovinj, Croatia
T1  - Environmental risk assessment of volatile organic contaminants in the Sava river aquifer, Belgrade, Serbia
SP  - 50
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_cer_6770
ER  - 

@conference{
author = "Šolević Knudsen, Tatjana and Ilić, Mila and Milić, Jelena and Avdalović, Jelena and Bulatović, Sandra and Marić, Nenad and Vrvić, Miroslav",
year = "2023",
abstract = "The aim of this study was to investigate the environmental risk from the gasoline range volatile
organic contaminants in the Sava river aquifer. The investigated area is located in New
Belgrade, in the vicinity of the largest heating plant in Belgrade, the capital of Serbia. Our
previous research on the oil pollutants in the groundwater at this locality was focused on the
origin and spatial distribution of these contaminants, and estimation of potential human
health risks from exposure to these compounds. [1] The purpose of our present study is a Tier
I Environmental risk assessment in this part of the aquifer.
Groundwater samples were collected from 28 hydrogeological boreholes. Preliminary
analyses of the organic compounds extracted from the groundwater samples were conducted
by gas chromatography with flame ionization detection (GC-FID), and by gas chromatography
– mass spectrometry (GC-MS). Volatile organic compounds (VOCs) were analyzed and
identified by headspace gas chromatography – mass spectrometry. Chemicals of concern were
quantified by headspace gas chromatography with flame ionization detection (HS-GC-FID).
In the groundwater samples analyzed, the most frequently detected VOCs were from the
group of the gasoline range organics. Concentrations of the individual VOCs ranged from
below detection limits to 5.2 mg/L. For each of the compounds quantified, the Risk Quotient
(RQ) was calculated as the ratio of the measured concentration of that compound in the
groundwater sample and the lowest Predicted Non-Effect Concentration for freshwater
aquatic organisms (PNEC). The PNEC values were adopted from the European chemicals
agency’s (ECHA) Registration Dossier database. [2] At some of the sampling points, the
detected concentrations of VOCs were higher than that of the PNEC values with resulting RQ
> 1. Considering the fact that the VOC compounds analyzed were present as mixtures, the
mixture RQ was calculated (as a sum of the individual RQs) for each sampling point. Out of 28
sampling points, at 7 of them the mixture RQs were higher than 1 which indicates a potentially
medium to high ecological risk from these compounds in this part of the aquifer.
In addition to the conclusion from our previous study on the human risk assessment from
exposure to the volatile organic compounds in the groundwater at this location, [1] this
research emphasizes a necessity for a continuous monitoring of the water quality in the
investigated area.",
publisher = "Croatian Society of Chemical Engineers",
journal = "Book of Abstracts - 28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI), March 28-31, 2023, Rovinj, Croatia",
title = "Environmental risk assessment of volatile organic contaminants in the Sava river aquifer, Belgrade, Serbia",
pages = "50-50",
url = "https://hdl.handle.net/21.15107/rcub_cer_6770"
}

Šolević Knudsen, T., Ilić, M., Milić, J., Avdalović, J., Bulatović, S., Marić, N.,& Vrvić, M.. (2023). Environmental risk assessment of volatile organic contaminants in the Sava river aquifer, Belgrade, Serbia. in Book of Abstracts - 28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI), March 28-31, 2023, Rovinj, Croatia
Croatian Society of Chemical Engineers., 50-50.
https://hdl.handle.net/21.15107/rcub_cer_6770

Šolević Knudsen T, Ilić M, Milić J, Avdalović J, Bulatović S, Marić N, Vrvić M. Environmental risk assessment of volatile organic contaminants in the Sava river aquifer, Belgrade, Serbia. in Book of Abstracts - 28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI), March 28-31, 2023, Rovinj, Croatia. 2023;:50-50.
https://hdl.handle.net/21.15107/rcub_cer_6770 .

Šolević Knudsen, Tatjana, Ilić, Mila, Milić, Jelena, Avdalović, Jelena, Bulatović, Sandra, Marić, Nenad, Vrvić, Miroslav, "Environmental risk assessment of volatile organic contaminants in the Sava river aquifer, Belgrade, Serbia" in Book of Abstracts - 28th Croatian Meeting of Chemists and Chemical Engineers (28HSKIKI), March 28-31, 2023, Rovinj, Croatia (2023):50-50,
https://hdl.handle.net/21.15107/rcub_cer_6770 .

TY  - CONF
AU  - Nikić, Zoran
AU  - Vidović, Milka M.
AU  - Marić, Nenad
AU  - Trajković, Ivana
AU  - Gordanić, Vojin
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7158
AB  - Hyperalkaline (pH>10.5) springs are extremely rare. There are only about ten in the entire world. This type of water has been identified in an ultramafic massif in central Serbia, on Mt. Studena, during the course of investigations conducted in 2017. The investigations included prospecting, terrain mapping and sampling, followed by assessment of data collected in situ and from laboratory analyses. The hyperalkaline spring is of the ascending type, its yield is very low (~0.05 L/s), and the water emerges in a diffuse fashion along fractures. The spring water is of the Ca-OH type, the pH level is 11.6 and the water temperature 11.2°C. The drainage area of the spring, like the entire Mt. Studena, is built up of Paleozoic ultramafic rocks, which geotectonically belong to the External Vardar Subzone. The spring is situated in the floodplain of the Brezanska River, whose channel is the local base level of erosion. The primary point of groundwater emergence is in solid ultramafic rocks, within a zone of fractures up to 0.5 mm wide, over a land area of ~1.5 m2. The paper describes a conceptual model of the formation of hyperalkaline water for the ascending spring in the ultramafic valley of the Brezanska River, on the northern slopes of Mt. Studena. The pH level of the groundwater is indicative of contemporary serpentinization, deep groundwater circulation and a prolonged contact between groundwater and ultramafic rocks along secondary fracture systems.
PB  - International Multidisciplinary Scientific GeoConferences (SGEM)
C3  - Conference Proceedings - 19th International Multidisciplinary Scientific GeoConference SGEM 2019
T1  - Occurrence of hyperalkaline spring water in the Brezanska river, Central Serbia
VL  - 19
SP  - 153
EP  - 160
UR  - https://hdl.handle.net/21.15107/rcub_cer_7158
ER  - 

@conference{
author = "Nikić, Zoran and Vidović, Milka M. and Marić, Nenad and Trajković, Ivana and Gordanić, Vojin",
year = "2019",
abstract = "Hyperalkaline (pH>10.5) springs are extremely rare. There are only about ten in the entire world. This type of water has been identified in an ultramafic massif in central Serbia, on Mt. Studena, during the course of investigations conducted in 2017. The investigations included prospecting, terrain mapping and sampling, followed by assessment of data collected in situ and from laboratory analyses. The hyperalkaline spring is of the ascending type, its yield is very low (~0.05 L/s), and the water emerges in a diffuse fashion along fractures. The spring water is of the Ca-OH type, the pH level is 11.6 and the water temperature 11.2°C. The drainage area of the spring, like the entire Mt. Studena, is built up of Paleozoic ultramafic rocks, which geotectonically belong to the External Vardar Subzone. The spring is situated in the floodplain of the Brezanska River, whose channel is the local base level of erosion. The primary point of groundwater emergence is in solid ultramafic rocks, within a zone of fractures up to 0.5 mm wide, over a land area of ~1.5 m2. The paper describes a conceptual model of the formation of hyperalkaline water for the ascending spring in the ultramafic valley of the Brezanska River, on the northern slopes of Mt. Studena. The pH level of the groundwater is indicative of contemporary serpentinization, deep groundwater circulation and a prolonged contact between groundwater and ultramafic rocks along secondary fracture systems.",
publisher = "International Multidisciplinary Scientific GeoConferences (SGEM)",
journal = "Conference Proceedings - 19th International Multidisciplinary Scientific GeoConference SGEM 2019",
title = "Occurrence of hyperalkaline spring water in the Brezanska river, Central Serbia",
volume = "19",
pages = "153-160",
url = "https://hdl.handle.net/21.15107/rcub_cer_7158"
}

Nikić, Z., Vidović, M. M., Marić, N., Trajković, I.,& Gordanić, V.. (2019). Occurrence of hyperalkaline spring water in the Brezanska river, Central Serbia. in Conference Proceedings - 19th International Multidisciplinary Scientific GeoConference SGEM 2019
International Multidisciplinary Scientific GeoConferences (SGEM)., 19, 153-160.
https://hdl.handle.net/21.15107/rcub_cer_7158

Nikić Z, Vidović MM, Marić N, Trajković I, Gordanić V. Occurrence of hyperalkaline spring water in the Brezanska river, Central Serbia. in Conference Proceedings - 19th International Multidisciplinary Scientific GeoConference SGEM 2019. 2019;19:153-160.
https://hdl.handle.net/21.15107/rcub_cer_7158 .

Nikić, Zoran, Vidović, Milka M., Marić, Nenad, Trajković, Ivana, Gordanić, Vojin, "Occurrence of hyperalkaline spring water in the Brezanska river, Central Serbia" in Conference Proceedings - 19th International Multidisciplinary Scientific GeoConference SGEM 2019, 19 (2019):153-160,
https://hdl.handle.net/21.15107/rcub_cer_7158 .