Evangelos Tzamos

EcoResources PC

Grecian Magnesite S.A., located in Gerakini, Chalkidiki, N. Greece, is a magnesite mining company, which produces and commercializes several Mg-based products. For production purposes, water is applied in large quantities for several uses. As a result, 5 × 106–7 × 106 m3 of wastewater, consisting mainly of muddy water, is produced from the magnesit...

Antimony has been included in the EU critical raw materials list considering its economic and strategic importance and high supply risk given that worldwide 75% of total antimony is produced in China. There are several antimony deposits in Greece, however, no one is currently exploited. Antimony is also found in mixed sulphide ores in Kassandra (Ol...

Ophiolites are rare on global scale, but provide a unique a petrogenetic source for at least a dozen raw materials. Ophiolites are remnants of oceanic lithosphere emplaced onto continental margins. They originate from the partial melting of the sub-oceanic mantle creating magmatic intrusions responsible for the creation and enlarging of oceanic spr...

The understanding of ophiolites as hosts to economic–scale chromitite ore deposits requires the integration of research relating their geochemical metallogenesis with studies of the mode and nature of their lithospheric-scale deformation. The Neotethyan Vourinos ophiolite in Northern Greece represents a well-preserved ophiolite complete with sheete...

Taking a circular approach to mining facilities requires the further exploitation of produced solid wastes, which are now considered as potential raw materials. This research aims to the re-utilization of specific mining wastes, containing mainly geologically degraded serpentinized minerals, produced during the minerals’ enrichment process of extra...

Ophiolite magnesite deposits are among the main sources of magnesite, a raw material critical for the EU. The present work focuses on magnesite occurrences at Kymasi (Evia Island, Greece), in close spatial association with chromitite within the same peridotite massif, and on the relationship between ultramafic rocks and late magnesite veins. Chromi...

The extraction of antimony and arsenic from galena concentrates by leaching with strongly alkaline sodium sulphide solution are investigated. The effects of leaching parameters including sodium sulphide and sodium hydroxide concentrations in the leaching solution, pulp density, reaction time and temperature on the extraction of antimony and arsenic...

The Gomati and Nea Roda ophiolites are located into the Serbo-Macedonian massif of the Chalkidiki peninsula (Northern Greece). The present work focuses on the variability of platinum-group elements (PGEs), geochemistry, spinel mineral chemistry, and platinum-group minerals (PGMs)-base metal minerals (BMMs) assemblage in chromitites of three Gomati...

Citation: Rekos, K.C.; Charisteidis, I.D.; Tzamos, E.; Palantzas, G.; Zouboulis, A.I.; Triantafyllidis, K.S. Valorization of Hazardous Organic Solid Wastes towards Fuels and Chemicals via Fast (Catalytic) Pyrolysis. Sustain. Chem. 2022, 3, 91-111. https://doi.org/10.3390/ suschem3010007 Academic Editor: Michael T. Timko

This volume honors Eldridge Moores, one of the most accomplished geologists of his generation. The volume starts with a summary of Moores’ achievements, along with personal dedications and memories from people who knew him. Leading off the volume’s 12 chapters of original scientific contributions is Moores’ last published paper that presents an exa...

The management of industrial and hazardous waste is a particularly important problem, on the one hand because of their hazardous nature, and on the other hand due to the lack of methods and infrastructure for their safe treatment. Their mismanagement can be a serious source of pollution for the soil, air, and the environment in general. Towards thi...

Grecian Magnesite S.A. (GM) is a magnesite mining company, which produces and commercializes several Mg-based products, such as Caustic Calcined Magnesia (CCM), Dead-Burned Magnesia (DBM), magnesium carbonate (raw magnesite) and basic monolithic refractories. GM's major deposits and production facilities are in Gerakini, Chalkidiki, N. Greece. In t...

The aim of this work was the study of chemical and mineralogical characteristics of serpentinized peridotites, produced in the magnesite mines of Gerakini (Chalkidiki, Greece), and the impact evaluation of magnetic separation and of thermal treatment with the addition of oxides in specimens of solid wastes left after the mineral enrichment processe...

Magnesite ore deposits are the main source of Mg for the industry and are used in the production of various kinds of magnesia. They are closely associated to ophiolite geological contexts, and are usually hosted within variously altered harzburgites and dunites. Greece hosts exploitable ophiolite-related magnesite deposits in two areas, located in...

The optimum dose of MgO, in mining wastes/by-products of magnesite mine "Grecian Magnesite SA" (Chalkidiki, N. Greece), containing mainly serpentine ores, was calculated in order to maximize the formation of desirable olivine (forsterite) after thermal treatment at 1300 o C, aiming to upgrade their refractory properties and find alternative uses un...

This study examines the development of a nanocomposite consisting of iron oxy-hydroxides (FeOOH) embedded on magnetite (Fe 3 O 4) nanocarriers, towards its application for the simultaneous uptake of As(V) and Sb(V) ionic forms at concentrations below drinking water regulation and its magnetically-assisted recovery at the end of the process. Conside...

The importance of magnesite for the EU economy and industry is very high, making the understanding of their genesis for the exploration for new deposits a priority for the raw materials scientific community. Towards this direction, the study of the magnesite-hosting ultramafic rocks can be proved very useful. For the present study, ultramafic rock...

The qualitative and quantitative characterization of several mining by-product samples, were collected from the magnesite mine of "Grecian Magnesite SA" company (Gerakini, Chalkidiki, North Greece), was aiming to evaluate the possibility of upgrading their refractory properties by applying thermal treatment. The concentration range of main componen...

Antimony is a common metalloid occurring in the form of Sb-sulfides and sulfosalts, in various base and noble metal deposits. It is also present in corresponding metallurgical products (concentrates) and, although antimony has been considered a penalty element in the past, recently it has gained interest due to its classification as a critical raw...

The Gomati ophiolite (Northern Greece) is located in the Serbo-Macedonian Massif, in the Hellenides orogenic belt. It consists of altered peridotites hosting scattered chromitite bodies. The ultramafics are enclosed in Silurian gneisses and schists, and are partially in contact with late Cenozoic granites. The present work focuses on accessory mine...

Τα φράγματα αποτελούν ειδικές κατασκευές που ο σχεδιασμός τους απαιτεί ειδικές γνώσεις. Η λειτουργία τους, το μέγεθός τους και ο τρόπος σχεδιασμού τους επηρεάζουν άμεσα την συμπεριφορά τους έναντι σεισμού και εν τέλει την σεισμική τρωτότητά τους. Πιθανή αστοχία τους έχει σημαντικές επιπτώσεις τόσο σε υλικό επίπεδο όσο και σε ανθρώπινο. Στα πλαίσια...

In magnesite-producing mines, the initial extraction of the ore is followed by a series of processes for the separation of magnesite from the host ultramafic rock, with the latter considered the by-product of the separation processes. Due to the serpentinization of the ultramafic rocks and the consequent alteration of the primary minerals olivine a...

The Gomati ultramafic body (Chalkidiki peninsula, Northern Greece) is located in the Serbo-Macedonian Massif, one of the geotectonic terranes composing the Hellenides orogenic belt. Ophiolite occurrences in this domain have an unclear origin, and consist of altered peridotites hosting scattered chromitite bodies with massive, schlieren and dissemin...

Qualitative and quantitative characterization of seven samples (W 1-W 7), which were collected from various grades from "Rachoni" magnesite mine of "Grecian Magnesite SA" company in Gerakini, Chalkidiki, Greece, was performed in this study. The characterization was aiming to their evaluation regarding the possibility of upgrading their properties u...

In the present study, mineralogical and chemical characterization of ten samples (X1-X10) was made for chromite ore-hosting ultramafic rock samples collected from the Xerolivado mine of Vourinos. Their characterization is aiming to their evaluation regarding the possibility of upgrading their physicochemical properties using various treatment metho...

Although electron microprobe analysis (EMPA) is the most common analytical method for the study of mineral chemistry, it cannot recognize the multiple oxidation states of transitional metals and, as a sequence, the Fe 2+ /Fe 3+ ratio is calculated stoichiometric. In the case of spinels, this calculation method is applied assuming a proportion of 1...

Mg-Fe cation exchange between olivine and spinel has been studied in the past, as its dependence from T and P allowed the calibration of several geothermometers. These can be used to infer temperatures from high-T conditions down to at least 650 • C. Moreover, cation exchange produces diffusivity patterns close to the intergranular limits, providin...

Pyrite/arsenopyrite (Py-AsPy), galena (PbS), and sphalerite (ZnS) concentrates from the flotation plants of Olympias and Stratoni (Kassandra mines, Chalkidiki, N. Greece) were investigated for their major, trace, minor, and critical element contents, including actinides associated to natural radioactivity. It is revealed that in addition to the Pb,...

The study of Mg–Fe2+ subsolidus exchange between olivine and spinel is a powerful tool to unravel the thermal history of ultramafic rocks. We have implemented such a study using olivine–spinel diffusivity patterns in fresh mineralogical samples from the Finero mafic-ultramafic Complex in the Ivrea-Verbano zone of Northern Italy. Our analytical suite i...

The crystal structure of spinels allows a wide range of cation substitutions, both in tetrahedral and in octahedral sites. In particular, when chromite is associated with olivine, these two minerals exchange Mg and Fe2+ ions under sub-solidus conditions. The exchange is temperature-pressure dependent. The dependence from T and (to a lesser extent)...

The Kassandra mining district contains porphyry Au-Cu and Au-Ag-Pb-Zn-Cu carbonate replacement deposits that are associated with Oligocene-Miocene intrusions emplaced into polydeformed metamorphic basement rocks belonging to the Permo-Carboniferous to Late Jurassic Kerdilion unit and the Ordovician-Silurian Vertiskos unit. Regional extensional tect...

Ports generate, receive, manage, and handle a large volume of different kinds of different wastes and these wastes are viewed by the port authorities as one of the most important environmental issues, with they must to deal with. The ship-port interface is recognized as being of critical importance for the reduction of illegal discharges of ship-ge...

The treatment, management, recovery and disposal of industrial and hazardous waste are common concerns worldwide. In Greece, such types of wastes are considered as an integral part of the immediate priorities and strategies of both the National Hazardous Waste Management Plan (NHWMP) and the respective Regional Waste Management Plans. According to...

The Vourinos ophiolite is a complete ophiolite sequence covering an area of ∼450 km2, that hosts the largest chromite mining district in Europe. Chrome ore deposits range in size from several millions of tonnes of Xerolivado-Skoumtsa mine to some thousand tonnes of the smallest exploited ores. Widespread mining activity closed in the 1990s, leaving...

Zeolitic rock samples from South Xerovouni contain on average, 57 wt.% HEU type zeolite, 6 wt.% clay minerals, 3 wt.% mica (total of 66 wt.% microporous minerals), 19 wt.% feldspars, 10 wt.% cristobalite and 5 wt.% quartz (total of 34 wt.% non-microporous minerals). Chemically the zeolitic rock consists mainly of 69.9 wt.% SiO2, 13.2 wt.% Al2O3, 1....

Landslides can provoke lifeline’s performance malfunction, injuries or fatalities and may diminish accessibility to critical facilities and surrounding properties. The scope of this research is to describe and to identify the triggering factors for three landslides along the road from Drosopigi village to the top of Vitsi Mountain at Florina territ...

Chrome ore deposits comprise less than 1% of the volume of a pervasively serpentinized dunite body (∼3.5 km³) that constitutes the Xerolivado-Skoumtsa Mine of the Vourinos Ophiolite in northwestern Greece. Ores have been examined to aid determination of their geological mode of occurrence, their mineralogy and mineral chemistry (Cr-spinel and olivi...

Several small chromium (Cr) ore bodies are hosted within a unit of tectonically thinned dunite in the retired Ayios Stefanos mine of the western Othris ophiolite complex in Greece. Chromium ores consist of tectonically imprinted bodies of semi-massive to massive, podiform and lenticular chromitites composed of chromian spinel [Cr-spinel] with high...

The treatment of wastewater (initial pH 7.7) from Sindos industrial area of Thessaloniki (Greece) with different proportions (0.1, 0.2, 0.4, 0.8, 1.6, 3.2, and 6.4 g) of Hellenic natural zeolite (HENAZE), resulted in overflowed clear water of pH 7.4–7.3, free of odours and improved by 69–76% for the chemical oxygen demand, 54–70% for nitrate ((Form...

The uptake of Cs, Pb, Cu, Zn, Cd, and Mn ions, from aqueous solutions by a HEU-type (clinoptilolite- heulandite) zeolitic tuff was studied in batch and column experiments. The effect of solutions concentration, time contact and flow rate on the uptake was also studied. The uptake sequence was found to be Cs>Pb>Cu>Zn>Cd>Mn. The uptake values were af...

The Serpentinite between the chromite bodies 4 and 5 of Xerolivado mine (Vourinos, Greece), contains sparsely very small grains (<20μm) of awaruite (Fe0.91Cu0.06Co0.03Ni3), heazlewoodite (Ni2.91Fe0.06S2), magnetite and Co pentlandite (Ni3.79Fe2.98Co2.38S8). The olivine contains 0.40 wt% NiO and 6.91 wt% FeO, while the serpentine 0.18 wt% NiO and 3....

A HEU-type zeolitic tuff of very-high quality (88 wt.% clinoptilolite-heulandite) has been used as an additive to natural soils, aiming to reduce the produced nitrate load in leachates, following a common irrigation scheme. Zeolitic tuff has been added and mixed with agricultural soil in three different proportions (0.2, 0.4 and 0.6%) corresponding...

The Serpentinite between the chromite bodies 4 and 5 of Xerolivado mine (Vourinos, Greece), contains sparsely very small grains (<20μm) of awaruite (Fe 0.91 Cu 0.06 Co 0.03 Ni 3), heazlewoodite (Ni 2.91 Fe 0.06 S 2), magnetite and Co-pentlandite (Ni 3.79 Fe 2.98 Co 2.38 S 8). The olivine contains 0.40 wt% NiO and 6.91 wt% FeO, while the serpentine...

Landslides can provoke lifeline's performance malfunction, injuries or fatalities and may diminish accessibility to critical facilities and surrounding properties. The scope of this research is to describe and to identify the triggering factors for three landslides along the road from Drosopigi village to the top of Vitsi Mountain at Flo-rina terri...

We present new data about the chemical and structural characteristics of bauxite residue (BR) from Greek Al industry, using a combination of microscopic, analytical, and spectroscopic techniques. SEM-EDS indicated a homogeneous dominant “Al-Fe-Ca-Ti-Si-Na-Cr matrix”, appearing at the microscale. The bulk chemical analyses showed considerable levels...

Twenty-seven (27) tap water samples were collected during October 2012 from the supply network of Thermi Municipality (central Macedonia, northern Greece) in order to assess their hydrogeochemical signatures and the overall quality status according to the European legislation and international standards. Samples were analysed for a total of 25 envi...

This review summarizes the existing data about the geological sources of As in Greece; their variety and the relevant concentrations make Greece a peculiar territory to generalize and better understand the methodology for their assessment. These sources concern As-containing ores in active and abandoned mining areas, geothermal/hydrothermal waters,...

http://goldschmidt.info/2015/abstracts/abstractView?abstractId=5692

The treatment of wastewater (initial pH 7.8) from Sindos industrial area of Thessaloniki (Greece) with different proportions (0.1-0.8 g) of Hellenic Natural Zeolite (HENAZE), resulted in overflowed clear water of pH 7.3, free of odours and improved by 69-77% for the chemical oxygen demand (COD), 54-60% for NO3, over than 97% for the P2O5 content an...

Twenty-eight (28) water samples were collected during October 2012 from taps of the water supply network of Thermi Municipality in order to assess their overall suitability and quality status according to the European legislation and international standards. Samples were analyzed for totally 25 environmentally significant parameters including physi...

80) δείγματα ύδατος από δεξαμενές ύδρευσης της περιοχής του Δήμου Θέρμης αναλύθηκαν με τη μέθοδο της φασματοφωτομετρίας UV-VIS στα πλαίσια προγράμματος περιβαλλοντικής παρακολούθησης για την περιεκτικότητά τους σε αζωτούχες ενώσεις (NO3-, NO2-και NH4 +). Οι δειγματοληψίες και οι αναλύσεις πραγματοποιήθηκαν κατά τη διάρκεια του έτους 2012 και από κά...

Seven commercial cosmetic clays having different colour (white, green, pink and red) available in pharmacies and herbalists’ shops in the Greek market have been examined for their trace element concentrations (Ag, As, Ba, Be, Cd, Ce, Co, Cr, Cs, Cu, Ga, Hf, Hg, La, Mo, Ni, Pb, Rb, Sb, Sc, Se, Sr, Tl, V, Y, Zn and Zr). According to EC Regulation 122...

Two kinds of clays (one white and one green) available in pharmacies and herbalist’s shops in the Greek market have been studied for their concentrations in trace elements, namely As, Be, Cd, Cr, Hg, Ni, P, Pb, Sb, Se, Te, Tl and Zr. According to EC Regulation 1223/2009, the presence of the analyzed trace elements and their compounds, are prohibite...

The commixture of sludge from Sindos industrial area of Thessaloniki with high quality HEU-type natural zeolite (tuff with 86 wt.% clinoptilolite-heulandite) in equal proportions, resulted in odourless and cohesive zeosludge. Also, the treatment of wastewater of pH 7.8 from the same area with high quality HEU-type natural zeolite (88 wt.% clinoptil...