TY  - CONF
AU  - Stefanović, M.
AU  - Jovančićević, Branimir
AU  - Šajnović, Aleksandra
AU  - Gallart, F.
AU  - Moreno-de las Heras, M.
AU  - Antić, N.
AU  - Kašanin-Grubin, Milica
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4908
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
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_cherry_4908
ER  - 

@conference{
author = "Stefanović, M. and Jovančićević, Branimir and Šajnović, Aleksandra and Gallart, F. and Moreno-de las Heras, M. and Antić, N. 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",
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_cherry_4908"
}

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
Belgrade : Serbian Chemical Society., 52-52.
https://hdl.handle.net/21.15107/rcub_cherry_4908

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. 2021;:52-52.
https://hdl.handle.net/21.15107/rcub_cherry_4908 .

Stefanović, M., Jovančićević, Branimir, Šajnović, Aleksandra, Gallart, F., Moreno-de las Heras, M., Antić, N., 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 (2021):52-52,
https://hdl.handle.net/21.15107/rcub_cherry_4908 .

TY  - CONF
AU  - Stefanović, M.
AU  - Mijatović, N.
AU  - Kašanin-Grubin, Milica
AU  - Veselinović, G.
AU  - Stojadinović, Sanja M.
AU  - Jovančićević, Branimir
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4924
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  - Book of Abstracts 21st; European Meeting on Environmental Chemistry
T1  - Anthropogenic and Climate Influence on Land Degradation
SP  - 141
EP  - 141
UR  - https://hdl.handle.net/21.15107/rcub_cherry_4924
ER  - 

@conference{
author = "Stefanović, M. and Mijatović, N. and Kašanin-Grubin, Milica and Veselinović, G. and Stojadinović, Sanja M. 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 = "Book of Abstracts 21st; European Meeting on Environmental Chemistry",
title = "Anthropogenic and Climate Influence on Land Degradation",
pages = "141-141",
url = "https://hdl.handle.net/21.15107/rcub_cherry_4924"
}

Stefanović, M., Mijatović, N., Kašanin-Grubin, M., Veselinović, G., Stojadinović, S. M.,& Jovančićević, B.. (2021). Anthropogenic and Climate Influence on Land Degradation. in Book of Abstracts 21st; European Meeting on Environmental Chemistry
Belgrade : Serbian Chemical Society., 141-141.
https://hdl.handle.net/21.15107/rcub_cherry_4924

Stefanović M, Mijatović N, Kašanin-Grubin M, Veselinović G, Stojadinović SM, Jovančićević B. Anthropogenic and Climate Influence on Land Degradation. in Book of Abstracts 21st; European Meeting on Environmental Chemistry. 2021;:141-141.
https://hdl.handle.net/21.15107/rcub_cherry_4924 .

Stefanović, M., Mijatović, N., Kašanin-Grubin, Milica, Veselinović, G., Stojadinović, Sanja M., Jovančićević, Branimir, "Anthropogenic and Climate Influence on Land Degradation" in Book of Abstracts 21st; European Meeting on Environmental Chemistry (2021):141-141,
https://hdl.handle.net/21.15107/rcub_cherry_4924 .