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36 results on '"Rogkala, Aikaterini"'

5. Microstructural and Microbiological Properties of Peloids and Clay Materials from Lixouri (Kefalonia Island, Greece) Used in Pelotherapy

Author

Lampropoulou, Paraskevi, primary, Petrounias, Petros, additional, Rogkala, Aikaterini, additional, Giannakopoulou, Panagiota P., additional, Gianni, Eleni, additional, Mantzoukas, Spiridon, additional, Lagogiannis, Ioannis, additional, Koukouzas, Nikolaos, additional, Hatziantoniou, Sophia, additional, and Papoulis, Dimitrios, additional

Published
2023
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7. The Effect of the Microstructure of Diabases from Greece and Cyprus on Their Engineering Characteristics and the Mechanical Behaviour of Concrete

Author

Petrounias, Petros, primary, Giannakopoulou, Panagiota P., additional, Rogkala, Aikaterini, additional, Papalla, Arsinoe, additional, Giamas, Vasileios, additional, Lampropoulou, Paraskevi, additional, Koutsovitis, Petros, additional, Koukouzas, Nikolaos, additional, and Hatzipanagiotou, Konstantin, additional

Published
2023
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9. Current CO2 Capture and Storage Trends in Europe in a View of Social Knowledge and Acceptance. A Short Review

Author

Koukouzas, Nikolaos, primary, Christopoulou, Marina, additional, Giannakopoulou, Panagiota P., additional, Rogkala, Aikaterini, additional, Gianni, Eleni, additional, Karkalis, Christos, additional, Pyrgaki, Konstantina, additional, Krassakis, Pavlos, additional, Koutsovitis, Petros, additional, Panagiotaras, Dionisios, additional, and Petrounias, Petros, additional

Published
2022
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10. Posidonia oceanica Balls (Egagropili) from Kefalonia Island Evaluated as Alternative Biomass Source for Green Energy.

Author

Petrounias, Petros, Giannakopoulou, Panagiota P., Rogkala, Aikaterini, Antoniou, Nikolaos, Koutsovitis, Petros, Zygouri, Evangelia, Krassakis, Pavlos, Islam, Ihtisham, and Koukouzas, Nikolaos

Subjects
POSIDONIA oceanica, POSIDONIA, RENEWABLE energy sources, BIOMASS, COASTS, CLEAN energy, WASTE products
Abstract

Research attempts on biomass use constitute a response to the growing demand for sustainable and low-cost energy from renewable sources. Hence, the sustainable use of Posidonia oceanica (PO) waste as a material for biomass to produce green energy is being considered in many countries in the Mediterranean region. PO meadows are considered as the main type of sea flora in the Greek coasts. PO can extract biomass from nearby ecosystems of the coastal zone, either directly through the transportation of disposed non-living leaves or indirectly via benthic organisms. The aim of this study is to investigate the use of PO waste derived from Kefalonia Island (Greece) as a biomass source. PO samples were collected around the island, and they were mineralogically and microstructurally analyzed. In addition, physicochemical, chemical, and thermogenic tests were performed in order to obtain the optimum and most completed characterization of the material. Based on the results, cellulose seems to be the main structural component of PO, which also seems to determine their behavior. PO presents microscopic similarities to other lignocellulosic materials which composition is made of carbonates, lignin, extractives, and minerals. Ash and moisture content constitute the two critical parameters that are responsible for the energy differences of each biomass. The outcome of this study shows the potential use of PO wastes as an interesting source for energy production. [ABSTRACT FROM AUTHOR]

Published
2023
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15. An Innovative Experimental Petrographic Study of Concrete Produced by Animal Bones and Human Hair Fibers

Author

Petrounias, Petros, primary, Rogkala, Aikaterini, additional, Giannakopoulou, Panagiota P., additional, Lampropoulou, Paraskevi, additional, Xanthopoulou, Vayia, additional, Koutsovitis, Petros, additional, Koukouzas, Nikolaos, additional, Lagogiannis, Ioannis, additional, Lykokanellos, Georgios, additional, and Golfinopoulos, Aristidis, additional

Published
2021
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16. Current CO 2 Capture and Storage Trends in Europe in a View of Social Knowledge and Acceptance. A Short Review.

Author

Koukouzas, Nikolaos, Christopoulou, Marina, Giannakopoulou, Panagiota P., Rogkala, Aikaterini, Gianni, Eleni, Karkalis, Christos, Pyrgaki, Konstantina, Krassakis, Pavlos, Koutsovitis, Petros, Panagiotaras, Dionisios, and Petrounias, Petros

Subjects
CARBON sequestration, SOCIAL acceptance, TECHNOLOGICAL innovations, CARBON dioxide, TRUST
Abstract

Carbon dioxide (CO2) has reached a higher level of emissions in the last decades, and as it is widely known, CO2 is responsible for numerous environmental problems, such as climate change. Thus, there is a great need for the application of CO2 capture and storage, as well as of CO2 utilization technologies (CCUS). This review article focuses on summarizing the current CCUS state-of-the-art methods used in Europe. Special emphasis has been given to mineralization methods/technologies, especially in basalts and sandstones, which are considered to be suitable for CO2 mineralization. Furthermore, a questionnaire survey was also carried out in order to investigate how informed about CO2 issues European citizens are, as well as whether their background is relative to their positive or negative opinion about the establishment of CCUS technologies in their countries. In addition, social acceptance by the community requires contact with citizens and stakeholders, as well as ensuring mutual trust through open communication and the opportunity to participate as early as possible in the development of actions and projects related to CO2 capture and storage, at all appropriate levels of government internationally, as citizens need to understand the benefits from such new technologies, from the local to the international level. [ABSTRACT FROM AUTHOR]

Published
2022
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17. Sustainable Use of By-Products and Wastes from Greece to Produce Innovative Eco-Friendly Pervious Concrete.

Author

Petrounias, Petros, Giannakopoulou, Panagiota P., Rogkala, Aikaterini, Kalpogiannaki, Maria, Laskaris, Nikolaos, Lampropoulou, Paraskevi, Mouzakis, Panagiotis, Panagiotaras, Dionisios, and Koukouzas, Nikolaos

Subjects
CONSTRUCTION & demolition debris, HOTEL design & construction, REFUSE containers, NATURAL resources, RAW materials, LIGHTWEIGHT concrete, FREEZE-thaw cycles, ELECTRONIC waste
Abstract

This study was based on the reduction of the extraction of natural resources and, at the same time, was focused on the use of by-products and various wastes in construction applications by following the principles of circular economy. Sterile natural rocks (limestones, basalts), industrial by-products (slags), hotel construction wastes (bathroom wastes) and electronic wastes (e-wastes) were tested for pervious concrete aggregates. For this reason, ten concrete specimens were prepared and tested petrographically, structurally, and physically. The physical properties of the tested raw materials directly depended on their petrographic characteristics and played crucial role for the permeability of the produced concrete specimens, for their mechanical behavior, and for the freeze–thaw test results. Generally, from this study, strong encouraging results were achieved as concrete made by variable wastes and by-products can be compatible for concrete production as they show similar performance both in the mechanical strength test and in the freeze–thaw test with those made by natural aggregates. Another goal of this study was to recommend to other researchers the extended use of by-products, construction wastes, and e-wastes as concrete aggregates for producing eco-friendly constructions. [ABSTRACT FROM AUTHOR]

Published
2022
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18. Evaluation of the CO 2 Storage Capacity in Sandstone Formations from the Southeast Mesohellenic trough (Greece).

Author

Christopoulou, Marina A., Koutsovitis, Petros, Kostoglou, Nikolaos, Paraskevopoulou, Chrysothemis, Sideridis, Alkiviadis, Petrounias, Petros, Rogkala, Aikaterini, Stock, Sebastian, and Koukouzas, Nikolaos

Subjects
POISSON'S ratio, SANDSTONE, CARBON dioxide, GAS absorption & adsorption, PETROPHYSICS
Abstract

This study investigates the capability of the Southeast Mesohellenic Trough (SE MHT) sandstone formations to serve as a potential reservoir for CO2 storage in response to the emerging climate change issues by promoting environmentally friendly mineral sequestration applications. Sandstone samples, for the first time, were evaluated for their petrographic characteristics, mineral chemistry, geochemical properties, as well as their petrophysical and gas adsorption properties through tests. The sandstones were tested and classified into distinct groups. The most promising site to be considered for pilot CO2 storage testing is the Pentalofos Formation locality since its sandstones display specific mineral phases with the proper modal composition to conceivably react with injected CO2, leading to the development of newly formed and stable secondary mineral phases. The gas adsorption results are also more encouraging for sandstones from this sedimentary formation. All the measured UCS (uniaxial compressive strength), Ei (bending stiffness), and ν (Poisson's ratio) results are above those dictated by international standards to perform CO2 storage practices safely. Furthermore, the specified targeted locality from the Pentalofos Formation holds the geological advantage of being overlaid by an impermeable cap-rock formation, making it suitable for deploying CO2 mineralization practices. The demarcated area could permanently store a calculated amount of ~50 × 105 tons of CO2 within the geological reservoir by reacting with the specified mineral phases, as specified through the proposed petrographic PrP index (potential reactive phases). [ABSTRACT FROM AUTHOR]

Published
2022
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23. Does the Methylene Blue Test Give Equally Satisfactory Results in All Studied Igneous Rocks Relative to the Identification of Swelling Clay Minerals?

Author

Giannakopoulou, Panagiota P., primary, Petrounias, Petros, additional, Rogkala, Aikaterini, additional, Lampropoulou, Paraskevi, additional, Gianni, Eleni, additional, Papoulis, Dimitrios, additional, Koutsovitis, Petros, additional, Tsikouras, Basilios, additional, and Hatzipanagiotou, Konstantin, additional

Published
2020
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36. Συν-σεισμική παραμόρφωση στο ρήγμα της Ελίκης

Author

Κουκουβέλας, Ιωάννης and Rogkala, Aikaterini

Subjects
Ρήγμα Ελίκης, Gulf of Corinth, 551.220 949 527, Κορινθιακός κόλπος, Earthquakes, Σεισμοί, Κολλουβιακές σφήνες
Abstract

Η παρούσα εργασία αναφέρεται στην περιοχή της αρχαίας Ελίκης, στο νομό Αχαΐας. Στην περιοχή αυτή έχουν συμβεί πολλοί σεισμοί, αρκετοί από τους οποίους έχουν αναγνωριστεί από την ιστορική σεισμικότητα. Επειδή, οι σεισμοί αυτοί έχουν άμεση σχέση με τη ζωή των ανθρώπων και τις δραστηριότητές τους, η κατανόηση της επίπτωσης της σεισμικότητας έχει μεγάλη σημασία και για την αρχαιολογία. Έτσι, αναλύθηκαν πέντε παλαιοσεισμολογικές τομές με σκοπό να αποτυπωθεί όσο το δυνατόν καλύτερα ο ρόλος των ρηγμάτων στην παραμόρφωση στην επιφάνεια της Γης με την αναγνώριση κολλουβιακών αποθέσεων. Τέλος, αναλύονται τα ρήγματα που είναι θαμμένα κάτω από την επιφάνεια, τα ρήγματα που φτάνουν στην επιφάνεια και οι κολλουβιακές σφήνες.

Published
2010

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