http://arthra.ugal.ro/handle/20.500.14043/25864 Fri, 17 Apr 2026 16:52:07 GMT 2026-04-17T16:52:07Z http://arthra.ugal.ro/handle/20.500.14043/25874 Study on the Soil chemical Pollution in the Area of the Residual Bauxite Lake "Mineri"-Tulcea Tudor, Beatrice; Ciocan, Anișoara The paper presents a study on the impact of chemical pollution of the soil, from residual bauxite lake, from "Mineri", in the areal of Tulcea. Soil samples were taken from the lake, and from the immediate area of the lake, where there are agricultural crops. We analyzed the samples in order to determine the chemical elements and pH of the soil, and the bioremediation methods that could be applied to diminish the effects of chemical soil pollution. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 3 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25874 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25873 Examining the Evolution of Microstructure and ITS Effect on the Mechanical and Tribological Properties Constantinescu, Stela This paper investigates the superior frictional performance of Ti-DLC films, by examining the evolution of microstructure and its effect on the mechanical and tribological properties. The superior frictional performance of Ti-DLC films can be attributed to the special microstructure related to the development of embedded fullerene-like microstructures as a result of incorporation of TiO2 clusters. The factors contributing to the ultralow friction include high hardness and cohesion, excellent toughness, and high load bearing capacity (brought by the increased crosslinking and elastic energy storage ability), the friction-induced structural transformation rendering an ultralow shear resistance and the excellent resistance to oxidation-induced mechanical property degradation (due to the doped TiO2). The Raman, high resolution transmission electron microscopy, atomic force microscope and micro-indentation measurements consistently reveal or indicate the formation of curved graphene sheets or fullerene-like microstructures with increasing CH4/Ar ratio. The Annals of "Dunarea de Jos" University of Galati : Fascicle IXMetallurgy and Materials Science No. 3 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25873 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25872 Recycling of Hematite Fine Waste by Pelletisation Ciocan, Anișoara; Tudor, Beatrice A large volume of by-products and residues is generated during iron and steel production. Much of these represents valuable materials and can be recovered and recycled inside the flow of integrated steel plants. The fine-grained residues, which are rich in iron, are usually recycled through sinter plants. This study aims at investigating the potential of palletization of two types of hematite fine waste resulted from process of chemical pickling of steel strip. The pelletizing tests were performed in an experimental disc pelletizer. The hematite was mixed with different fluxing and binding agents. The green pellets were then dried, sintered and cooled. The effect of materials mixtures on the physical and chemical characteristics of pellets was determined and analyzed in relation with nature of pelletized components. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 3 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25872 2017-01-01T00:00:00Z http://arthra.ugal.ro/handle/20.500.14043/25871 The Importance of Using Membranes in Seawater Desalination as a Result of Excessive Exploitation of Water Sources Tătaru, Laurențiu; Nedeff, Valentin; Bârsan, Narcis; Lehăduș, Mirela-Panaite; Chițimuș, Dana-Alexandra This paper is a detailed study of the need to find and implement new solutions for water filtration and the promotion of modern techniques that are more effective than traditional methods. As a result of extension waste water pollution as well as low efficiency through classical filtration means, more and more research is being discussed and researched worldwide, focusing on the use of hybrid membranes for seawater desalination. Hybrid membrane filtration processes present a number of advantages including superior water quality but also reduced energy consumption that was needed in previous purification processes. This review describes the water desalination process in detail by looking at the relationship between membrane module operating parameters and energy efficiency. The methodology and the experimental installation of the desalination process will be presented in part. The results of the study clearly showed that the combined use of membrane processes is efficient due to the flexibility of exploitation, the low acquisition costs and the high degree of water filtration through low energy consumption. A major advantage in the use of membranes is that the energy required to conduct filtering processes can be obtained from solar, wind energy, which means significant environmental benefits by promoting "green energy". The worldwide implementation of the use of membrane water desalination methods also involves increasing the percentage of fresh water, so this is a solution to be considered in present and future research. The Annals of "Dunarea de Jos" University of Galati : Fascicle IX Metallurgy and Materials Science No. 3 - 2017, ISSN 1453-083X Sun, 01 Jan 2017 00:00:00 GMT http://arthra.ugal.ro/handle/20.500.14043/25871 2017-01-01T00:00:00Z