TY  - CONF
AU  - Antić, Nevena
AU  - Bertalan, Laszlo
AU  - Stefanović, Milica
AU  - Kašanin-Grubin, Milica
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7428
AB  - Badlands can develop under different climatic conditions ranging from arid to humid on materials that have a specific combination of physico-chemical properties depending on their mineralogical composition. Mostly these materials are fine-grained terrigenous, lacustrine or marine sediments of different age. However, badlands can also form in volcano-clasitc materials, and Cappadocia badlands in Turkey is the most prominent example. Less known in the literature are two sites also developed in this type of sediments: Đavolja Varoš, on Radan Moutain in SE Serbia and the Kazár badlands in NW Hungary. The Đavolja Varoš badlands, 0.7 km2 in size is formed by the intensive development of rills and gullies on slopes built from thick volcano-clastic material. The initial relief is reduced only to sharp ridges between adjacent gullies. This badland is developed in dacito-andesitic poorly-consolidated poorly-sorted tuffs. The weathering processes are intense and governed by high intensity precipitation and prolonged drying periods. The reddish earth pyramids built of these erodible materials are protected by the cap rock. Loss of balance and fall of the protective cap rock accelerates the erosion. The smaller Kazár badlands covering the area of 1ha are developed in rhyolitic poorly-consolidated highly porous tuffs. Rills and gullies are the dominant geomorphic processes and the weathering is dominated by freeze-thaw processes. At the Kazár badlands earth pyramids are not protected with the cap rock and weathering, disintegration and sheet wash erosion intensively shape the landscape. Although the materials differ slightly in composition, both being poorly sorted, clay-size rich materials make them sensitive to erosion, proving once more the importance of material composition, in this case namely grain size including sorting and mineralogical composition, for badlands development and future evolution.
PB  - Association of Geographical Societies in Europe
C3  - 9th EUGEO Congress, Barcelona, Spain 4-7 September 2023
T1  - Badlands in volcano-clastic rocks: examples from Serbia and Hungary
SP  - 927
UR  - https://hdl.handle.net/21.15107/rcub_cer_7428
ER  - 

@conference{
author = "Antić, Nevena and Bertalan, Laszlo and Stefanović, Milica and Kašanin-Grubin, Milica",
year = "2023",
abstract = "Badlands can develop under different climatic conditions ranging from arid to humid on materials that have a specific combination of physico-chemical properties depending on their mineralogical composition. Mostly these materials are fine-grained terrigenous, lacustrine or marine sediments of different age. However, badlands can also form in volcano-clasitc materials, and Cappadocia badlands in Turkey is the most prominent example. Less known in the literature are two sites also developed in this type of sediments: Đavolja Varoš, on Radan Moutain in SE Serbia and the Kazár badlands in NW Hungary. The Đavolja Varoš badlands, 0.7 km2 in size is formed by the intensive development of rills and gullies on slopes built from thick volcano-clastic material. The initial relief is reduced only to sharp ridges between adjacent gullies. This badland is developed in dacito-andesitic poorly-consolidated poorly-sorted tuffs. The weathering processes are intense and governed by high intensity precipitation and prolonged drying periods. The reddish earth pyramids built of these erodible materials are protected by the cap rock. Loss of balance and fall of the protective cap rock accelerates the erosion. The smaller Kazár badlands covering the area of 1ha are developed in rhyolitic poorly-consolidated highly porous tuffs. Rills and gullies are the dominant geomorphic processes and the weathering is dominated by freeze-thaw processes. At the Kazár badlands earth pyramids are not protected with the cap rock and weathering, disintegration and sheet wash erosion intensively shape the landscape. Although the materials differ slightly in composition, both being poorly sorted, clay-size rich materials make them sensitive to erosion, proving once more the importance of material composition, in this case namely grain size including sorting and mineralogical composition, for badlands development and future evolution.",
publisher = "Association of Geographical Societies in Europe",
journal = "9th EUGEO Congress, Barcelona, Spain 4-7 September 2023",
title = "Badlands in volcano-clastic rocks: examples from Serbia and Hungary",
pages = "927",
url = "https://hdl.handle.net/21.15107/rcub_cer_7428"
}

Antić, N., Bertalan, L., Stefanović, M.,& Kašanin-Grubin, M.. (2023). Badlands in volcano-clastic rocks: examples from Serbia and Hungary. in 9th EUGEO Congress, Barcelona, Spain 4-7 September 2023
Association of Geographical Societies in Europe., 927.
https://hdl.handle.net/21.15107/rcub_cer_7428

Antić N, Bertalan L, Stefanović M, Kašanin-Grubin M. Badlands in volcano-clastic rocks: examples from Serbia and Hungary. in 9th EUGEO Congress, Barcelona, Spain 4-7 September 2023. 2023;:927.
https://hdl.handle.net/21.15107/rcub_cer_7428 .

Antić, Nevena, Bertalan, Laszlo, Stefanović, Milica, Kašanin-Grubin, Milica, "Badlands in volcano-clastic rocks: examples from Serbia and Hungary" in 9th EUGEO Congress, Barcelona, Spain 4-7 September 2023 (2023):927,
https://hdl.handle.net/21.15107/rcub_cer_7428 .

TY  - JOUR
AU  - Stefanović, Milica
AU  - Šajnović, Aleksandra
AU  - Kašanin-Grubin, Milica
AU  - Vergari, Francesca
AU  - Troiani, Francesco
AU  - Moreno-de-las-Heras, Mariano
AU  - Gallart, Francesc
AU  - Desloges, Joseph
AU  - Jovančićević, Branimir
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7182
AB  - The aim of this study is to investigate the influence of weathering processes on the distribution of n-alkanes in unweathered and weathered samples of badland material. Organic matter (OM) of both the weathered and unweathered zones in badland environments is derived from the same sources such any differences between the n-alkane pattern of the two zones can be attributed to the impact of weathering processes under different climate conditions. Organic geochemical and mineralogical characterizations were employed to investigate twenty-one samples from weathered badland environments in Italy, Spain, and Canada that originally derive from marine, distal alluvial, and fluvial depositional settings, respectively. According to the distribution of n-alkanes and diterpanes, unweathered samples from Italy have an original mixed aquatic-terrestrial origin of OM, with a variable (low to moderate) contribution of terrestrial plants as precursors, while unweathered samples from Spain predominantly contain OM originating from submerged/floating macrophytes deposited under reducing conditions. Unweathered samples from Canada predominantly consist of terrigenous OM. Intensity of changes in n-alkanes distribution when subjected to weathering depends on the type of precursor biomass and quantity of smectite. Predominantly terrigenous OM under semi-arid conditions shows the highest affinity for adsorption is in contact with smectite surfaces. Mid- and long-chain odd n-alkanes have a tendency to build colloidal particles with polar organic compounds such as fatty acids by strong binding and thus their preservation from degradation is possible.
PB  - Elsevier
T2  - CATENA
T1  - Impact of weathering processes on n-alkane pattern in badlands
VL  - 231
SP  - 107352
DO  - 10.1016/j.catena.2023.107352
ER  - 

@article{
author = "Stefanović, Milica and Šajnović, Aleksandra and Kašanin-Grubin, Milica and Vergari, Francesca and Troiani, Francesco and Moreno-de-las-Heras, Mariano and Gallart, Francesc and Desloges, Joseph and Jovančićević, Branimir",
year = "2023",
abstract = "The aim of this study is to investigate the influence of weathering processes on the distribution of n-alkanes in unweathered and weathered samples of badland material. Organic matter (OM) of both the weathered and unweathered zones in badland environments is derived from the same sources such any differences between the n-alkane pattern of the two zones can be attributed to the impact of weathering processes under different climate conditions. Organic geochemical and mineralogical characterizations were employed to investigate twenty-one samples from weathered badland environments in Italy, Spain, and Canada that originally derive from marine, distal alluvial, and fluvial depositional settings, respectively. According to the distribution of n-alkanes and diterpanes, unweathered samples from Italy have an original mixed aquatic-terrestrial origin of OM, with a variable (low to moderate) contribution of terrestrial plants as precursors, while unweathered samples from Spain predominantly contain OM originating from submerged/floating macrophytes deposited under reducing conditions. Unweathered samples from Canada predominantly consist of terrigenous OM. Intensity of changes in n-alkanes distribution when subjected to weathering depends on the type of precursor biomass and quantity of smectite. Predominantly terrigenous OM under semi-arid conditions shows the highest affinity for adsorption is in contact with smectite surfaces. Mid- and long-chain odd n-alkanes have a tendency to build colloidal particles with polar organic compounds such as fatty acids by strong binding and thus their preservation from degradation is possible.",
publisher = "Elsevier",
journal = "CATENA",
title = "Impact of weathering processes on n-alkane pattern in badlands",
volume = "231",
pages = "107352",
doi = "10.1016/j.catena.2023.107352"
}

Stefanović, M., Šajnović, A., Kašanin-Grubin, M., Vergari, F., Troiani, F., Moreno-de-las-Heras, M., Gallart, F., Desloges, J.,& Jovančićević, B.. (2023). Impact of weathering processes on n-alkane pattern in badlands. in CATENA
Elsevier., 231, 107352.
https://doi.org/10.1016/j.catena.2023.107352

Stefanović M, Šajnović A, Kašanin-Grubin M, Vergari F, Troiani F, Moreno-de-las-Heras M, Gallart F, Desloges J, Jovančićević B. Impact of weathering processes on n-alkane pattern in badlands. in CATENA. 2023;231:107352.
doi:10.1016/j.catena.2023.107352 .

Stefanović, Milica, Šajnović, Aleksandra, Kašanin-Grubin, Milica, Vergari, Francesca, Troiani, Francesco, Moreno-de-las-Heras, Mariano, Gallart, Francesc, Desloges, Joseph, Jovančićević, Branimir, "Impact of weathering processes on n-alkane pattern in badlands" in CATENA, 231 (2023):107352,
https://doi.org/10.1016/j.catena.2023.107352 . .

TY  - CONF
AU  - Antić, Nevena
AU  - Stefanović, Milica
AU  - Mijatović, Nevenka
AU  - Kašanin-Grubin, Milica
AU  - Veselinović, Gorica
AU  - Stojadinović, Sanja
AU  - Jovančićević, Branimir
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7101
AB  - Badlands are areas with scarce or completely absent vegetation formed in a wide range of lithologies in different climate conditions and exposed to a wide range of geomorphological processes [1]. Generally, rapid evolution governed by erosion processes is a consequence of complex mineralogical and physico-chemical sediment composition and climate conditions. Because of that, badlands are often described as natural field laboratories and, furthermore, badland material is suitable for laboratory experiments that can, in controlled conditions, provide insight of changes that occur in the field.
As indicated above, beside lithology, climate is one of the most significant factors in badlands forming. Since human activities have great impact on the environment and since climate changes present one of the biggest environmental pollution problems nowadays, in this research badland material was exposed to different conditions with the aim of monitoring changes caused by extreme climate conditions and acid ice.
Three samples from badlands in China organized in six sets were treated with ice (representing snow) and acid ice (frozen acid rain) during fifteen cycles, dried in the oven for three cycles and afterwards again threated with ice and acid ice for additional five cycles. After each cycle samples were photographed, so that physical changes can be tracked, while leachate was collected and analyzed for monitoring changes in its volume, pH, electrical conductivity (EC) and cation concentration.
Beside slight oscillations in parameters through cycles of samples treated with acid ice, extreme changes in observed parameters were not noticed neither between samples, nor between treatments. Leachate EC were a bit higher in samples treated with ice, leachate volume was higher for samples treated with acid ice, while pH was similar in both cases. Cation concentrations are similar in the leachate of all tested samples. In most of cases, the highest concentrations were measured at the beginning of the experiment, during the first two cycles or during the first “ice” cycles after drying. This indicates the high cation concentrations originate from the sediment surface or washing along the crack that appeared after drying.   
Physical changes that occurred through cycles implied that heat/drought is more aggressive agent of sediment decay. Decay caused by ice is slower, not as aggressive as drought, but not negligible, causing noticeable and significant cracks and fissures of fragments.
 This experiment confirmed that drought has high impact on sediment weathering, but more importantly, pointed out the impact of ice and its thawing, opening new questions about climate impact on forming, erosion processes and evolution of badlands which need to be further examined.
PB  - Belgrade : Serbian Chemical Society
C3  - 21st European Meeting on Environmental Chemistry, EMEC21 - Book of Abstracts, November 30 – December 3, 2021 Novi Sad, Serbia
T1  - Anthropogenic and Climate Influence on Land Degradation
SP  - 141
EP  - 141
UR  - https://hdl.handle.net/21.15107/rcub_cer_7101
ER  - 

@conference{
author = "Antić, Nevena and Stefanović, Milica and Mijatović, Nevenka and Kašanin-Grubin, Milica and Veselinović, Gorica and Stojadinović, Sanja and Jovančićević, Branimir",
year = "2021",
abstract = "Badlands are areas with scarce or completely absent vegetation formed in a wide range of lithologies in different climate conditions and exposed to a wide range of geomorphological processes [1]. Generally, rapid evolution governed by erosion processes is a consequence of complex mineralogical and physico-chemical sediment composition and climate conditions. Because of that, badlands are often described as natural field laboratories and, furthermore, badland material is suitable for laboratory experiments that can, in controlled conditions, provide insight of changes that occur in the field.
As indicated above, beside lithology, climate is one of the most significant factors in badlands forming. Since human activities have great impact on the environment and since climate changes present one of the biggest environmental pollution problems nowadays, in this research badland material was exposed to different conditions with the aim of monitoring changes caused by extreme climate conditions and acid ice.
Three samples from badlands in China organized in six sets were treated with ice (representing snow) and acid ice (frozen acid rain) during fifteen cycles, dried in the oven for three cycles and afterwards again threated with ice and acid ice for additional five cycles. After each cycle samples were photographed, so that physical changes can be tracked, while leachate was collected and analyzed for monitoring changes in its volume, pH, electrical conductivity (EC) and cation concentration.
Beside slight oscillations in parameters through cycles of samples treated with acid ice, extreme changes in observed parameters were not noticed neither between samples, nor between treatments. Leachate EC were a bit higher in samples treated with ice, leachate volume was higher for samples treated with acid ice, while pH was similar in both cases. Cation concentrations are similar in the leachate of all tested samples. In most of cases, the highest concentrations were measured at the beginning of the experiment, during the first two cycles or during the first “ice” cycles after drying. This indicates the high cation concentrations originate from the sediment surface or washing along the crack that appeared after drying.   
Physical changes that occurred through cycles implied that heat/drought is more aggressive agent of sediment decay. Decay caused by ice is slower, not as aggressive as drought, but not negligible, causing noticeable and significant cracks and fissures of fragments.
 This experiment confirmed that drought has high impact on sediment weathering, but more importantly, pointed out the impact of ice and its thawing, opening new questions about climate impact on forming, erosion processes and evolution of badlands which need to be further examined.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "21st European Meeting on Environmental Chemistry, EMEC21 - Book of Abstracts, November 30 – December 3, 2021 Novi Sad, Serbia",
title = "Anthropogenic and Climate Influence on Land Degradation",
pages = "141-141",
url = "https://hdl.handle.net/21.15107/rcub_cer_7101"
}

Antić, N., Stefanović, M., Mijatović, N., Kašanin-Grubin, M., Veselinović, G., Stojadinović, S.,& Jovančićević, B.. (2021). Anthropogenic and Climate Influence on Land Degradation. in 21st European Meeting on Environmental Chemistry, EMEC21 - Book of Abstracts, November 30 – December 3, 2021 Novi Sad, Serbia
Belgrade : Serbian Chemical Society., 141-141.
https://hdl.handle.net/21.15107/rcub_cer_7101

Antić N, Stefanović M, Mijatović N, Kašanin-Grubin M, Veselinović G, Stojadinović S, Jovančićević B. Anthropogenic and Climate Influence on Land Degradation. in 21st European Meeting on Environmental Chemistry, EMEC21 - Book of Abstracts, November 30 – December 3, 2021 Novi Sad, Serbia. 2021;:141-141.
https://hdl.handle.net/21.15107/rcub_cer_7101 .

Antić, Nevena, Stefanović, Milica, Mijatović, Nevenka, Kašanin-Grubin, Milica, Veselinović, Gorica, Stojadinović, Sanja, Jovančićević, Branimir, "Anthropogenic and Climate Influence on Land Degradation" in 21st European Meeting on Environmental Chemistry, EMEC21 - Book of Abstracts, November 30 – December 3, 2021 Novi Sad, Serbia (2021):141-141,
https://hdl.handle.net/21.15107/rcub_cer_7101 .

TY  - CONF
AU  - Stefanović, Milica
AU  - Jovančićević, Branimir
AU  - Šajnović, Aleksandra
AU  - Gallart, Francesco
AU  - Moreno-de las Heras, Mariano
AU  - Antić, Nevena
AU  - Kašanin-Grubin, Milica
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6433
AB  - Badlands are areas with limited vegetation, reduced or no human activity, and a great variety of geomorphic processes [1]. Badland materials have a different responsetothe same environmental conditions, because of differences in their mineralogical and physico-chemical characteristics. Many studies show that smectite-poorsediments are more resistant to different weathering treatments of freezing, thawing, wetting, and drying,than smectite-rich materials [2,3].In this paper, three unweathered samples of badlands from Spain were analyzed with the aim of monitoring, but also comparing physico-chemical changes caused by simulations of changes in climatic conditions. Selectedsediment samples havedifferent compositions. Besides quartz and calcite, the first sampleis composed of smectite and gypsum (3 UW), the second of smectite (4 UW), while the third sample is composed of neither smectite nor gypsum (5 UW). The experiment setup was designed in the way that each sample had three sub-samples, a sample for simulation of rain, snow, and a control sample (Figure 1). Sample_rain was treated with a rain intensity of ~850 ml/h for 10 minutes (~140 ml), while sample_snow was treated with crushed ice (~150 g). After precipitation simulations snow were put samples were placed in a climate chamber at - 3 °C together with a control sample. This was repeated for 15 cycles. Every cycle was documented with photographs. The leached solution was collected and its volume, pH, electrical conductivity (EC), and ion concentrations were measured. The second part of the experiment was based on exposing the samples after wetting to higher temperatures, 50 ° C. It was done in 8 cycles. FESEM and BET analyzes were performed for each sample before and after the experiments.The 3 UW samples had significantly different leachate pH and EC, while the leachate volume was similar for all samples during the experiment. Sulphate ions were leached in the highest concentrations during the whole experiment from the sample with both smectite and gypsum present. The sample with smectite has shown the highest disintegration of the structure, especially after the simulation of snow. The sample with smectite and gypsum has shown a lower degree of degradation than sample 3 UW due to the content of gypsum which increases the weathering resistance of the material. Sample 5 UW has shown the lowest degradation of the structure along with the weathering cycles. This study has proven that both mineralogical and physico-chemical properties of sediments are important for predicting their response to variable climate factors.
PB  - Belgrade : Serbian Chemical Society
C3  - Book of Abstracts - 21st European Meeting on Environmental Chemistry, EMEC 21, November 30 – December 3, 2021 Novi Sad, Serbia
T1  - The Response of Badland Materials from Spain with Different Mineralogical Content on Seasonal Changes
SP  - 52
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_cer_6433
ER  - 

@conference{
author = "Stefanović, Milica and Jovančićević, Branimir and Šajnović, Aleksandra and Gallart, Francesco and Moreno-de las Heras, Mariano and Antić, Nevena and Kašanin-Grubin, Milica",
year = "2021",
abstract = "Badlands are areas with limited vegetation, reduced or no human activity, and a great variety of geomorphic processes [1]. Badland materials have a different responsetothe same environmental conditions, because of differences in their mineralogical and physico-chemical characteristics. Many studies show that smectite-poorsediments are more resistant to different weathering treatments of freezing, thawing, wetting, and drying,than smectite-rich materials [2,3].In this paper, three unweathered samples of badlands from Spain were analyzed with the aim of monitoring, but also comparing physico-chemical changes caused by simulations of changes in climatic conditions. Selectedsediment samples havedifferent compositions. Besides quartz and calcite, the first sampleis composed of smectite and gypsum (3 UW), the second of smectite (4 UW), while the third sample is composed of neither smectite nor gypsum (5 UW). The experiment setup was designed in the way that each sample had three sub-samples, a sample for simulation of rain, snow, and a control sample (Figure 1). Sample_rain was treated with a rain intensity of ~850 ml/h for 10 minutes (~140 ml), while sample_snow was treated with crushed ice (~150 g). After precipitation simulations snow were put samples were placed in a climate chamber at - 3 °C together with a control sample. This was repeated for 15 cycles. Every cycle was documented with photographs. The leached solution was collected and its volume, pH, electrical conductivity (EC), and ion concentrations were measured. The second part of the experiment was based on exposing the samples after wetting to higher temperatures, 50 ° C. It was done in 8 cycles. FESEM and BET analyzes were performed for each sample before and after the experiments.The 3 UW samples had significantly different leachate pH and EC, while the leachate volume was similar for all samples during the experiment. Sulphate ions were leached in the highest concentrations during the whole experiment from the sample with both smectite and gypsum present. The sample with smectite has shown the highest disintegration of the structure, especially after the simulation of snow. The sample with smectite and gypsum has shown a lower degree of degradation than sample 3 UW due to the content of gypsum which increases the weathering resistance of the material. Sample 5 UW has shown the lowest degradation of the structure along with the weathering cycles. This study has proven that both mineralogical and physico-chemical properties of sediments are important for predicting their response to variable climate factors.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Book of Abstracts - 21st European Meeting on Environmental Chemistry, EMEC 21, November 30 – December 3, 2021 Novi Sad, Serbia",
title = "The Response of Badland Materials from Spain with Different Mineralogical Content on Seasonal Changes",
pages = "52-52",
url = "https://hdl.handle.net/21.15107/rcub_cer_6433"
}

Stefanović, M., Jovančićević, B., Šajnović, A., Gallart, F., Moreno-de las Heras, M., Antić, N.,& Kašanin-Grubin, M.. (2021). The Response of Badland Materials from Spain with Different Mineralogical Content on Seasonal Changes. in Book of Abstracts - 21st European Meeting on Environmental Chemistry, EMEC 21, November 30 – December 3, 2021 Novi Sad, Serbia
Belgrade : Serbian Chemical Society., 52-52.
https://hdl.handle.net/21.15107/rcub_cer_6433

Stefanović M, Jovančićević B, Šajnović A, Gallart F, Moreno-de las Heras M, Antić N, Kašanin-Grubin M. The Response of Badland Materials from Spain with Different Mineralogical Content on Seasonal Changes. in Book of Abstracts - 21st European Meeting on Environmental Chemistry, EMEC 21, November 30 – December 3, 2021 Novi Sad, Serbia. 2021;:52-52.
https://hdl.handle.net/21.15107/rcub_cer_6433 .

Stefanović, Milica, Jovančićević, Branimir, Šajnović, Aleksandra, Gallart, Francesco, Moreno-de las Heras, Mariano, Antić, Nevena, Kašanin-Grubin, Milica, "The Response of Badland Materials from Spain with Different Mineralogical Content on Seasonal Changes" in Book of Abstracts - 21st European Meeting on Environmental Chemistry, EMEC 21, November 30 – December 3, 2021 Novi Sad, Serbia (2021):52-52,
https://hdl.handle.net/21.15107/rcub_cer_6433 .