Άρθρα και δημοσιεύσεις για τις εφαρμογές του ζεόλιθου και του διατομίτη

Ruder Boskovic  Institute, Zagreb, Croatia I. INTRODUCTION A particular structural feature of zeolites relative to other aluminosilicate materials, and other crystalline materials in general, is the existence of channels and/or cavities linked by channels. One of the characteristics that distinguishes zeolites from other porous materials is their variety of pore sizes and shapes. The size and shape of channels/cavities in zeolites therefore define the structural parameters of a given type of zeolite (1). Properties of zeolites, such as ion exchange, intercrystalline pores that discriminate between molecules of different dimension, strong acidic sites, and active reservoirs for metal-catalyzed reactions, have earned ... Read more

Use of zeolite in the International Space Station (ISS) cabin air purification system According to a publication on NASA’s website, zeolite is set to be used in the air purification system of the International Space Station (ISS). In this air purification system (CDRA), which is responsible for safety in the crew cabin, zeolite of varying particle sizes will be used in future to remove carbon dioxide. The cabin air passes through a layer of zeolite, to which water and carbon dioxide molecules are adsorbed, whilst all other gases pass through. The zeolite is reactivated after being heated and exposed to ... Read more

With the new data from the Kokkalo area near Petrota, in Northern Evros, the mapping of Greek zeolite is revealing more and more information about these strategic reserves of our country. The recording of geological data and the identification of zeolite tuffs now give us a clearer picture of the location of the deposits of interest to us due to their high clinoptilolite content. In other words, we no longer rely solely on estimates, as we did previously for the area, but tangible results – and indeed, some of these are backed up by chemical analyses, thanks to the tremendous ... Read more

ISS Science for Everyone Science Objectives for Everyone The ZCG investigations examined how subtle changes in the chemical formulation affected nucleation and growth of zeolite crystals. The microgravity environment allowed researchers to grow higher-quality crystals. These crystals have a number of useful commercial applications as catalysts and absorbents. Science Results for Everyone Information Pending The following content was provided by Albert Sacco, Jr., Ph.D., and is maintained in a database by the ISS Program Science Office. Experiment Details OpNom: Principal Investigator(s) Albert Sacco, Jr., Ph.D., Lubbock, TX, United States Co-Investigator(s)/Collaborator(s) Information Pending Developer(s) Northeastern University, Center for Advanced Microgravity Materials ... Read more

Rural development policy is one of the most important sectors in Greece. Of course, we have become accustomed to hearing about farmers in a passive way, in the context of subsidies, without realising what an important role they play for our country. We have a land with great potential and enormous diversity. We must make the most of these assets and showcase them. In this context, Greek zeolite can play a huge role, as it protects the soil, enables water savings for irrigation, avoids the need for heavy-duty pesticides, reduces the use of fertilisers – as cultivation becomes more efficient ... Read more

DOI:10.1080/01496395.2015.1068332 Mahdeyeh Sheikhshoaieab, Tayebeh Shamspura, S. Zia Mohammadib Vahid Abstract A multi-element preconcentration–separation technique for metal ions is established. The procedure is based on complex formation of metal ions with Bis(2-hydroxy-1-naphtaldimine)-N-diethylentriamine (BHNDT) on nanoporous Analcime as sorbent followed by their determination using flame atomic absorption spectrometry. The effects of analytical parameters like pH, flow rates, eluent types and sorption capacity on the recoveries of metal ions are investigated. In order to predict the extraction ability of BHNDT for different metallic ions, DFT method is used to compute the binding energies of the cations to the title Schiff base compound. The ... Read more

How much intelligence does one need to realise that, during an economic crisis, not all the solutions can be found at the Ministry of the Economy, since it can only manage what it already has? In other words, at best, this is a matter of cost-saving. So, as long as we do not invest – in the political sense – in the Ministry of Productive Reconstruction, Environment and Energy, we will not change the economic situation. Because through this Ministry we can not only bring about immediate change – for example, with the second offshore block in the Greek EEZ ... Read more

There is no excuse for Skouries. Whatever may be said, whatever promises may be made by all sides, it is unacceptable that work is continuing. We all know that this is not about gold, but about gold dust. We can all see that chemical mining is unacceptable. This whole process is driven solely by the gold market and cannot be considered a serious investment, even from an economic point of view. When you destroy everything, because you ignore everything, you cannot carry on without incurring a cost. Even the use of the police must stop, because this amounts to manipulation. ... Read more

The Greek EEZ and Greek zeolite are highly strategic tools and constructive solutions that can provide practical help to our country. Consequently, these are issues that we must promote under all circumstances, come what may, because they are not merely cost-saving measures, but measures for recovery and growth. With the EEZ and zeolite, we are also operating in the maritime context of the Ionian Sea, the Peloponnese and Crete, and on land in Macedonia and Thrace… Read the rest here: Lygeros.org

Rather than waiting for everything to come to us, we must take steps towards innovation ourselves. With the first samples demonstrating the quality of Greek zeolite in the Kokkalo area, we have the opportunity to develop new products that offer added value. Greek zeolite is clinoptilolite, but each has its own local characteristics. Greek zeolite is of the Eulandite type. It therefore has a general formula: (Ca,Na₂)₂(Si₇Al₂O₁₈), 6H₂O, but as it is clinoptilolite, it contains the following elements: Si-Al-Na-K-Ca. However, as we are actually talking about zeolite tuff, there are always other elements present. Read the rest here: Lygeros.org

It is now time to move on to the next stage, to stop focusing exclusively on the economy and to invest in strategic thinking. Enough already of this Greek-style culture of misery, where the whole point is how to undermine one another in order to win votes. We are part of Hellenism and must rise above these wretched party differences and disputes. We must devote all our energies to helping both Greece and Cyprus. If we do not have a strategic goal on which we all agree, then we deserve our fate. Read the rest here: Lygeros.org

Firstly, the unacceptable chemical extraction of gold must be stopped as soon as possible. Secondly, this has nothing to do with any promise, but with the fact that it is devastating for the environment and, more importantly, that it is irreversible. Thirdly, the exact number of workers is irrelevant; what matters is what alternative work we can offer them, and the answer is zeolite. Read the rest here: Lygeros.org