Pub Date : 2022-01-17DOI: 10.3390/materproc2021005103
N. Koukouzas, S. Kalaitzidis, P. Koutsovitis, A. Bouzinos, C. Karkalis, P. Tyrologou, D. Karapanos
This review presents a mineralogical and physicochemical comparison of coal seams located in the regions of Northwest and Central Greece. The comparison extends to the fly ash derivatives from the coal combustion for energy production, in the cases where data are available. Coal occurrences from Northwest Greece tend to exhibit higher content of rare earth elements (REE) compared to those of Central Greece. Moreover, fly ash products show similar trends in Light-REE compared to their coal parent rocks. The observed REE distribution seems to be correlated with the occurrence of specific minerals such as allanite, monazite, as well as with Fe-contents.
{"title":"Physicochemical Properties and REE Distribution of the Northwest and Central Greece Coal Deposits: A Review","authors":"N. Koukouzas, S. Kalaitzidis, P. Koutsovitis, A. Bouzinos, C. Karkalis, P. Tyrologou, D. Karapanos","doi":"10.3390/materproc2021005103","DOIUrl":"https://doi.org/10.3390/materproc2021005103","url":null,"abstract":"This review presents a mineralogical and physicochemical comparison of coal seams located in the regions of Northwest and Central Greece. The comparison extends to the fly ash derivatives from the coal combustion for energy production, in the cases where data are available. Coal occurrences from Northwest Greece tend to exhibit higher content of rare earth elements (REE) compared to those of Central Greece. Moreover, fly ash products show similar trends in Light-REE compared to their coal parent rocks. The observed REE distribution seems to be correlated with the occurrence of specific minerals such as allanite, monazite, as well as with Fe-contents.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81362405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-17DOI: 10.3390/materproc2021005102
Chariton Sachanidis, F. Pavloudakis, C. Roumpos
Under the pressure of competition, primarily caused by the high price of carbon dioxide emission allowances, lignite production in Western Macedonia Lignite Centre dramatically reduced in the last decade. This development affects the ambient air quality of the greater lignite mine area, as evidenced by the reducing particulate matter concentrations and the number of exceedances of daily average concentrations per year. Moreover, differences in air quality measurements of monitoring stations, with regard to their distance from mining activities, now tend to be minimized. Based on these facts, it can be predicted that, after the phase-out of electricity generation activities, the ambient air quality will reach the levels that are typical for rural areas of Northern Greece well before the end of the mines’ land reclamation programs.
{"title":"Correlation of Ambient Air Quality with the Sudden Reduction in Mining Activity in a Complex of Lignite Mines","authors":"Chariton Sachanidis, F. Pavloudakis, C. Roumpos","doi":"10.3390/materproc2021005102","DOIUrl":"https://doi.org/10.3390/materproc2021005102","url":null,"abstract":"Under the pressure of competition, primarily caused by the high price of carbon dioxide emission allowances, lignite production in Western Macedonia Lignite Centre dramatically reduced in the last decade. This development affects the ambient air quality of the greater lignite mine area, as evidenced by the reducing particulate matter concentrations and the number of exceedances of daily average concentrations per year. Moreover, differences in air quality measurements of monitoring stations, with regard to their distance from mining activities, now tend to be minimized. Based on these facts, it can be predicted that, after the phase-out of electricity generation activities, the ambient air quality will reach the levels that are typical for rural areas of Northern Greece well before the end of the mines’ land reclamation programs.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83248528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-13DOI: 10.3390/materproc2021005098
V. Makri, S. Bellas, Vasilis Gaganis
Although subsurface traps have been regularly explored for hydrocarbon exploration, natural gas and CO2 storage has drawn industrial attention over the past few decades, thanks to the increasing demand for energy resources and the need for greenhouse gas mitigation. With only one depleted hydrocarbon field in Greece, saline aquifers, salt caverns and sedimentary basins ought to be evaluated in furtherance of the latter. Within this study the potential of the Greek subsurface for underground storage is discussed. An overview and re-evaluation of the so-far studied areas is implemented based on the available data. Lastly, a pragmatic approach for the storage potential in Greece was created, delineating gaps and risks in the already proposed sites. Based on the above details, a case study for CO2 storage is presented, which is relevant to the West Katakolo field saline aquifer.
{"title":"Assessing Natural Gas Versus CO2 Potential Underground Storage Sites in Greece: A Pragmatic Approach †","authors":"V. Makri, S. Bellas, Vasilis Gaganis","doi":"10.3390/materproc2021005098","DOIUrl":"https://doi.org/10.3390/materproc2021005098","url":null,"abstract":"Although subsurface traps have been regularly explored for hydrocarbon exploration, natural gas and CO2 storage has drawn industrial attention over the past few decades, thanks to the increasing demand for energy resources and the need for greenhouse gas mitigation. With only one depleted hydrocarbon field in Greece, saline aquifers, salt caverns and sedimentary basins ought to be evaluated in furtherance of the latter. Within this study the potential of the Greek subsurface for underground storage is discussed. An overview and re-evaluation of the so-far studied areas is implemented based on the available data. Lastly, a pragmatic approach for the storage potential in Greece was created, delineating gaps and risks in the already proposed sites. Based on the above details, a case study for CO2 storage is presented, which is relevant to the West Katakolo field saline aquifer.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87727444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-13DOI: 10.3390/materproc2021005100
L. Yurramendi, J. Hidalgo, A. Siriwardana
The feasibility of using low-environmental-impact leaching media to recover valuable metals from lithium ion batteries (LIBs) has been evaluated. Several deep eutectic solvents (DES) were tested as leaching agents in the presence of different type of additives (i.e., H2O2). The optimization of Co recovery was carried out by investigating various operating conditions, such as reaction time, temperature, solid (black mass) to liquid (DES) ratio, additive type, and concentration. Leaching with final selected DES choline chloride (33%), lactic acid (53%), and citric acid (13%) at 55 °C achieved an extraction yield of more than 95% for the cobalt. The leaching mechanism likely begins with the dissolution of the active material in the black mass (BM) followed by chelation of Co(II) with the DES. The results obtained confirm that those leaching media are an eco-friendly alternative to the strong inorganic acids used nowadays.
{"title":"A Sustainable Process for the Recovery of Valuable Metals from Spent Lithium Ion Batteries by Deep Eutectic Solvents Leaching","authors":"L. Yurramendi, J. Hidalgo, A. Siriwardana","doi":"10.3390/materproc2021005100","DOIUrl":"https://doi.org/10.3390/materproc2021005100","url":null,"abstract":"The feasibility of using low-environmental-impact leaching media to recover valuable metals from lithium ion batteries (LIBs) has been evaluated. Several deep eutectic solvents (DES) were tested as leaching agents in the presence of different type of additives (i.e., H2O2). The optimization of Co recovery was carried out by investigating various operating conditions, such as reaction time, temperature, solid (black mass) to liquid (DES) ratio, additive type, and concentration. Leaching with final selected DES choline chloride (33%), lactic acid (53%), and citric acid (13%) at 55 °C achieved an extraction yield of more than 95% for the cobalt. The leaching mechanism likely begins with the dissolution of the active material in the black mass (BM) followed by chelation of Co(II) with the DES. The results obtained confirm that those leaching media are an eco-friendly alternative to the strong inorganic acids used nowadays.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"147 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85358364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-13DOI: 10.3390/materproc2021005099
Petra Grgasović, S. Šoštarić
The level of innovativeness within the higher education systems of east and southeast Europe and their graduates is still assessed as modest or moderate. Besides the general socio–economic context and the inherited institutional management types, this deficiency stems from a lack of generic skills crucial for increasing the innovation capacity of the universities. TrainESEE v.2 project suggests that significant changes should be already put in place within the applied teaching methodology, but also highlights the importance of developing project development and management skills, innovation, entrepreneurial skills, and finally competences needed to strengthen science to business cooperation.
{"title":"Systematic Development of Generic Skills to Enhance Innovation Capacity of Eastern and Southeastern European Universities","authors":"Petra Grgasović, S. Šoštarić","doi":"10.3390/materproc2021005099","DOIUrl":"https://doi.org/10.3390/materproc2021005099","url":null,"abstract":"The level of innovativeness within the higher education systems of east and southeast Europe and their graduates is still assessed as modest or moderate. Besides the general socio–economic context and the inherited institutional management types, this deficiency stems from a lack of generic skills crucial for increasing the innovation capacity of the universities. TrainESEE v.2 project suggests that significant changes should be already put in place within the applied teaching methodology, but also highlights the importance of developing project development and management skills, innovation, entrepreneurial skills, and finally competences needed to strengthen science to business cooperation.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85503495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-12DOI: 10.3390/materproc2021005093
A. Antoniadis, C. Roumpos, P. Anagnostopoulos, Nikolaos Paraskevis
In the context of the complete phase-out of lignite-fired power plants and the corresponding surface mines, the central priority is to ensure a fair development transition for the lignite mining areas. In the context of the installation of renewable energy system projects in the surface lignite mines of Western Macedonia, this paper aims to analyze the challenges for developing photovoltaic projects in areas with different characteristics and to propose solutions for selecting suitable areas, based on corresponding analysis. The investigated parameters cover a wide range of spatial criteria. The results contribute to a pragmatic transition to green energy generation involving a circular economy and sustainable development.
{"title":"Planning RES Projects in Exhausted Surface Lignite Mines—Challenges and Solutions","authors":"A. Antoniadis, C. Roumpos, P. Anagnostopoulos, Nikolaos Paraskevis","doi":"10.3390/materproc2021005093","DOIUrl":"https://doi.org/10.3390/materproc2021005093","url":null,"abstract":"In the context of the complete phase-out of lignite-fired power plants and the corresponding surface mines, the central priority is to ensure a fair development transition for the lignite mining areas. In the context of the installation of renewable energy system projects in the surface lignite mines of Western Macedonia, this paper aims to analyze the challenges for developing photovoltaic projects in areas with different characteristics and to propose solutions for selecting suitable areas, based on corresponding analysis. The investigated parameters cover a wide range of spatial criteria. The results contribute to a pragmatic transition to green energy generation involving a circular economy and sustainable development.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81039140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-12DOI: 10.3390/materproc2021005094
Elena Yaneva, S. Papaefthymiou, Lea M. Daling, S. Šoštarić, Ildiko Merta
This article presents a methodology applied to the design of a tailor-made program for teaching staff that addresses the needs of high-level educational institutions in the Eastern and South-Eastern European (ESEE) region. The tailor-made program was implemented as a one-week online course for 22 “Trainees” from six ESEE universities earlier in 2021. “Trainees” from six participating universities are currently developing acceleration programs, planned to occur continuously until 2024, increasing the percentage of the trained academic staff to >50% at each of the six universities. During that period, 240 students will benefit from 140 improved RawMaterials-related courses, improving their learning and understanding.
{"title":"Rethinking Education in the Raw Materials Sector through Tailor-Made Teaching Methodologies","authors":"Elena Yaneva, S. Papaefthymiou, Lea M. Daling, S. Šoštarić, Ildiko Merta","doi":"10.3390/materproc2021005094","DOIUrl":"https://doi.org/10.3390/materproc2021005094","url":null,"abstract":"This article presents a methodology applied to the design of a tailor-made program for teaching staff that addresses the needs of high-level educational institutions in the Eastern and South-Eastern European (ESEE) region. The tailor-made program was implemented as a one-week online course for 22 “Trainees” from six ESEE universities earlier in 2021. “Trainees” from six participating universities are currently developing acceleration programs, planned to occur continuously until 2024, increasing the percentage of the trained academic staff to >50% at each of the six universities. During that period, 240 students will benefit from 140 improved RawMaterials-related courses, improving their learning and understanding.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85382721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-11DOI: 10.3390/materproc2021005092
M. Galetakis, Vassilios Deligiorgis, Emmanuel Steiakakis, Stella Raka, M. Alheib
In this study we present a generic probabilistic risk assessment methodology to evaluate the risk associated with flooding process of a pit. We use the bow-tie analysis to analyze the critical events (we focus on slope failures) and the systemic risk assessment methodology to estimate the risk for the population, for the environment and for the infrastructure. Furthermore, we perform a spatial analysis of the risk by discretizing the affected area into squares, by estimating the risk in each one and finally by creating the risk map. The methodology is implemented by specialized software that has been created in a Matlab environment for the deduction of such risk assessments. The developed methodology was applied in the area of the pit lake Most in Czech Republic.
{"title":"Risk Assessment Methodology for Pit Lakes Instabilities","authors":"M. Galetakis, Vassilios Deligiorgis, Emmanuel Steiakakis, Stella Raka, M. Alheib","doi":"10.3390/materproc2021005092","DOIUrl":"https://doi.org/10.3390/materproc2021005092","url":null,"abstract":"In this study we present a generic probabilistic risk assessment methodology to evaluate the risk associated with flooding process of a pit. We use the bow-tie analysis to analyze the critical events (we focus on slope failures) and the systemic risk assessment methodology to estimate the risk for the population, for the environment and for the infrastructure. Furthermore, we perform a spatial analysis of the risk by discretizing the affected area into squares, by estimating the risk in each one and finally by creating the risk map. The methodology is implemented by specialized software that has been created in a Matlab environment for the deduction of such risk assessments. The developed methodology was applied in the area of the pit lake Most in Czech Republic.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88172204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-06DOI: 10.3390/materproc2021005090
Maria Kouroutzi, A. Stratidakis, M. Kermenidou, S. Karakitsios, D. Sarigiannis
A novel roofing tile was developed containing various types of nanoparticles of titanium dioxide (TiO2). Experiments were conducted using three types of TiO2 nanoparticles with and without polyethylene glycol (PEG). All types of newly developed nanomaterials were characterized using X-ray diffractometry. Particle size distribution analysis was performed and specific surface area was determined using the Brunauer–Emmet–Teller method. SEM imaging was used for the morphological characterization of nanoparticles. Commercial ceramic roofing tiles underwent a dip-coating procedure to obtain the desired photocatalytic surface. The TiO2 anatase samples exhibited greater surface areas of nanoparticles, thus providing potentially the highest photocatalytic efficiency.
{"title":"Application of TiO2 Nanoparticles in Clay Roofing Tiles as a Photocatalytic Active Material","authors":"Maria Kouroutzi, A. Stratidakis, M. Kermenidou, S. Karakitsios, D. Sarigiannis","doi":"10.3390/materproc2021005090","DOIUrl":"https://doi.org/10.3390/materproc2021005090","url":null,"abstract":"A novel roofing tile was developed containing various types of nanoparticles of titanium dioxide (TiO2). Experiments were conducted using three types of TiO2 nanoparticles with and without polyethylene glycol (PEG). All types of newly developed nanomaterials were characterized using X-ray diffractometry. Particle size distribution analysis was performed and specific surface area was determined using the Brunauer–Emmet–Teller method. SEM imaging was used for the morphological characterization of nanoparticles. Commercial ceramic roofing tiles underwent a dip-coating procedure to obtain the desired photocatalytic surface. The TiO2 anatase samples exhibited greater surface areas of nanoparticles, thus providing potentially the highest photocatalytic efficiency.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"7 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91490908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-29DOI: 10.3390/materproc2021005088
V. Renaud, M. Al Heib, Roxane Muller, J. Burda
Almost all post exploitation open pit mines in the world are shaped as a final reservoir intended to be filled with water. In Europe, the creation of water lakes is the most common way of reclaiming post open pit mines. The safety and the security of mine lakes is one of the priorities of mine regions. One of the main hazards identified is the slope stability of lake banks. To develop a reliability methodology for assessing the long-term stability of flooded open pit mines, a large-scale numerical model of the lake was carried out and was applied on Lake Most, which is one of the largest mining lakes in Europe (Czech Republic). The large-scale numerical model was built, based on the site observations, large scale LiDAR data and geotechnical data. The results highlighted the reliability of the methodology to combine the geometric model with the geological model to create a large-scale numerical model, and to identify local and potentially instable zones.
{"title":"Long-Term Slope Stability of Abandoned Mine Lake—Numerical Modelling and Risk Assessment","authors":"V. Renaud, M. Al Heib, Roxane Muller, J. Burda","doi":"10.3390/materproc2021005088","DOIUrl":"https://doi.org/10.3390/materproc2021005088","url":null,"abstract":"Almost all post exploitation open pit mines in the world are shaped as a final reservoir intended to be filled with water. In Europe, the creation of water lakes is the most common way of reclaiming post open pit mines. The safety and the security of mine lakes is one of the priorities of mine regions. One of the main hazards identified is the slope stability of lake banks. To develop a reliability methodology for assessing the long-term stability of flooded open pit mines, a large-scale numerical model of the lake was carried out and was applied on Lake Most, which is one of the largest mining lakes in Europe (Czech Republic). The large-scale numerical model was built, based on the site observations, large scale LiDAR data and geotechnical data. The results highlighted the reliability of the methodology to combine the geometric model with the geological model to create a large-scale numerical model, and to identify local and potentially instable zones.","PeriodicalId":18729,"journal":{"name":"Materials Proceedings","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86193509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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