A synthesis of the circulation and hydrography of the South Aegean Sea and the Straits of the Cretan Arc (March 1994–January 1995)     

Alexander Theocharis  Efstathios Balopoulos  Soterios Kioroglou  Harilaos Kontoyiannis  Athanassia Iona 《Progress in Oceanography》1999,44(4):1

Four seasonal oceanographic cruises were carried out in the Eastern Mediterranean Sea, within the framework of the CEC/MAST-MTP Project PELAGOS, during 1994–1995. The surveys covered the South Aegean Sea and the adjacent open sea regions (southeastern Ionian, northwestern Levantine). Analysis of CTD data revealed that a multiscaled circulation pattern prevails in the area. It differs from the circulations detected during the 1986–87, thus indicating interannual variability. Cyclonic and anticyclonic gyres and eddies are interconnected by currents and jets variable in space and time. Most of the features are persistent, others seem transitional or recurrent. The hydrological structure is also complex and apart from the upper layer does not present basinwide any significant seasonality. Dynamical and hydrological regimes are variable in the upper and intermediate layers at the Straits of the Cretan Arc, while the deep regime seems rather constant. Topographic control is evident on the flows through the straits. The new very dense deep water mass, namely the Cretan Deep Water (CDW) and a well-defined intermediate layer of minimum temperature and salinity, the so-called Transition Mediterranean Water (TMW), consists the new important structural elements of the South Aegean Sea. The CDW outflows towards the deep and bottom layers of the Eastern Mediterranean, thus considerably contributing to the formation of the new, denser Deep and Bottom Water of the Eastern Mediterranean, which sinks and displaces the Eastern Mediterranean Deep Water of Adriatic origin in the adjacent sea regions outside the Aegean Sea.  相似文献   

Direct Conversion of Food Waste into 3D Porous Carbon Traps for Selective Adsorption of Cationic Dyes     

Anitha Senthamizhan  Brabu Balusamy  Doriana Debellis  Jose Alejandro Heredia-Guerrero  Giorgio Mancini  Riccardo Carzino  Luca Ceseracciu  Athanassia Athanassiou  Despina Fragouli 《洁净——土壤、空气、水》2023,51(1):2200284

Conversion of waste biomass into valuable functional materials accomplishes the concept of circular economy in the development of sustainable waste management, and also recovery of such resources possibly reduces the requirement of feedstocks. In this scenario, the development of methodologies toward the direct conversion of the raw biomass into solid adsorbent materials without the use of any templates is highly desirable, but exceptionally challenging due to the complexity of the process. Here the direct synthesis of 3D porous carbon traps by a simple, cost-effective, and template-free process starting from a kitchen-based recipe and fermented food waste is described. Precisely, a robust carbon trap is formed with a spongy structure and highly interconnected hierarchical pores after the pyrolysis of a rice-based foam in the air. The developed materials float on water and interact efficiently with cationic dyes at static conditions. Importantly, such performance of the 3D carbon traps is not affected in the presence of anionic dyes, indicating the excellent selectivity towards the adsorption of cationic dyes. The adsorbent can be easily recovered and reused for up to 3 cycles without releasing any byproducts, thus, without causing hazardous risk of any secondary pollution to the environment.  相似文献   

Reusable nanocomposite-coated polyurethane foams for the remediation of oil spills     

J. Pinto  J. A. Heredia-Guerrero  A. Athanassiou  D. Fragouli 《International Journal of Environmental Science and Technology》2017,14(10):2055-2066

Cost-effective oil absorbents for the remediation of oil spills have been developed following a facile process involving the modification of polyurethane foam surfaces with mixtures of silicon oxide nanoparticles and polydimethylsiloxane. Polyurethane foams with different pore sizes and connectivity are tested, and it was found that the proposed treatment, applied by dip coating and spray coating, strongly improves the intrinsic foams’ performance in terms of selectivity and oil absorption capacity. The modified foams reach oil absorption capacities up to 60 g/g and simultaneous negligible water uptake. The treatment is stable after multiple absorption cycles, and therefore, the foams can be reused without significant decrease in their performance, being possible, after five cycles of absorption and recovery of oil, to reach overall oil absorption capacities up to 250 g/g.  相似文献