Ζεόλιθος στη Βιομηχανία Καταναλωτικών Αγαθών

Solar Cooling System Preserves Food Without Electricity Solar Cooling System Preserves Food Without Electricity An eco-friendly and cheap cooling system developed by a Mexican researcher uses solar energy to maintain temperature of food and water at nine degrees Celsius for three months. Refrigerating systems have been under the spot light ever since they were found guilty of polluting the atmosphere with the Chlorofluorocarbons (CFCs), causing a depletion in the ozone layer. As of the 1970s, the negative effect of these compounds has globally acknowledged and heavily regulated. Nevertheless, their use in refrigerating systems continues to be apparent, and it will remain ... Διαβάστε περισσότερα

Babak Ahmadi *, Mohammad Shekarchi Construction Materials Institute, Department of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran abstract Natural zeolite, a type of frame-structured hydrated aluminosilicate mineral, is used abundantly as a type of natural pozzolanic material in some regions of the world. In this work, the effectiveness of a locally quarried zeolite in enhancing mechanical and durability properties of concrete is evaluated and is also compared with other pozzolanic admixtures. The experimental tests included three parts: In the first part, the pozzolanic reactivity of natural zeolite and silica fume were examined by a thermogravimetric method. In ... Διαβάστε περισσότερα

Use of zeolite-containing biologically active food supplement in patients with burn trauma [Article in Russian] Maianskaia NN, Blagitko EM, Poliakevich AS, Vokhmintseva LV, Novoselov IaB, Maianskaia SD. Abstract The content of cationic protein in blood neutrophils, the serum activity of lysosomal enzymes, the intensity of peroxide lipid oxidation, the antioxidant serum activity and the blood concentration of trace elements were assessed in patients with burn injury. Some patients as addition to the main therapy got zeolyt-containing biological active addition to food (BAAF) “Lytovit” with its ability for sorption and selective ion exchange. Before the beginning of the treatment in all patients high value of the ... Διαβάστε περισσότερα

Characterization of Cement Pastes Containing Natural Zeolite as a Pozzolanic Admixture Characterization of Cement Pastes Containing Natural Zeolite as a Pozzolanic Admixture Abstract A possible use of natural zeolite originating from a mining area in South Slovakia as a pozzolanic material suitable for the partial cement replacement in composite production is studied. Measurement of chemical composition of natural zeolite is performed using XRF analysis. The particle size distribution of zeolite and dry paste mixtures is accessed on laser diffraction principle. For the tested pastes, basic physical properties and mechanical properties are determined. The obtained results indicate a good potential for ... Διαβάστε περισσότερα

Natural Clinoptilolite and Chabazite as Carrier for Antibacterial Agents of Cetylpyridinium Chloride (CPC) and Silver Abstract Natural clinoptilolite (Cli) and chabazite (Cha) were used as the carrier for two types of antibacterial agents: cetylpyridinium chloride (CPC) and silver cations (Ag). CPC-zeolites, Ag-zeolites and CPC-Ag-zeolites were characterized by Energy Dispersive X-ray (EDX) analyzer and Fourier Transform Infrared (FTIR) spectroscopy and proved the attachment of CPC molecules on Ag-zeolite in CPC-Ag-zeolite samples. The determination of Minimum Inhibition Concentration (MIC) against P. aeruginosa and B. subtilis in saline solution and distilled water was performed to observe the effect of chloride ions on the antibacterial activity of the ... Διαβάστε περισσότερα

Study on the Effect of Adding Zeolite and other Bio-Adsorbance in Enhancing the Quality of the Palm Based Vermicompost Abstract This research work deals with the production of vermicompost from empty fruit bunch (EFB) blended with cow dung using an epigeic earthworm known as Eudrilus Eugeniae. The vermicomposting mixture was carried out in a humid environment with moisture content between 70% to 80% and a pH of between 6 to 8. Natural zeolite, such as clinoptilolite and charcoal were mixed with vermicompost at different ratios and prior to being pelletized. The highest cation exchange capacity (CEC) was observed at 10% ... Διαβάστε περισσότερα

The Study on Zeolite Column Adsorption of Groundwater Nitrate Abstract By zeolite column adsorption test process of nitrate pollution of groundwater, the research of three different inlet velocity of nitrate nitrogen removal, and the roles of nitrite nitrogen accumulation, zeolite adsorption of ammonia nitrogen and the influence of pH value changes, the results show that when the flow rate of 70 mL/h, the nitrate nitrogen concentration in the reaction column rising velocity under concentration less than before, but nitrate nitrogen concentration in the zeolite column has remained at about 3 mg/L, removal rate has remained at more than 95%; Nitrite ... Διαβάστε περισσότερα

Preparation of Compound Clinoptilolite Filter Material and Performance of Ammonia Nitrogen Removal Abstract This experiment use natural clinoptilolite powder as main materials to prepare the large specific surface and high porosity spherical compound filter material by adding adhesive and pore-forming agent etc.This compound filter material has favourable effect when treating sanitary wastewater. The static adsorption test showed that the absorption ratio of ammonia-nitrogen is 58.5% when the compound filter material dosage was 100g/L, NH4+-N concentration was 100mg/L and the contact time was 40min.The cure fitting of the adsorption isotherm of NH4+-N on the compound filter material could be well described ... Διαβάστε περισσότερα

University of Minnesota developed a method to improve biofuel production University of Minnesota developed a method to improve biofuel production American scientists developed computer screening method that identifies materials able to improve biofuel production process. Research team from the University of Minnesota in cooperation with Argonne National Laboratory led a number of researches that would improve biofuel production efficiency. Scientists offer to use alumino silicate and zeolite as a molecular sieve either to filter chemical components or to be a catalyst of chemical reactions. Now more than 200 of various zeolites are available. The main aim of this research is ... Διαβάστε περισσότερα

The water protection – Nikos Lygeros Translated from the Greek by Athena Kehagias Since there is at last, a formal consultation regarding the water protection from agricultural fertilizers, the role of the zeolite must be promoted in this process. More specifically, it regards the approval of: Code of Good Agricultural Practice for Protection of Waters from nitrates of agricultural sources and livestock activity, which is exactly the field of action of zeolite, since it’s already used in deceleration fertilizers. And the reason is simple, since the zeolite is able to absorb ammonia and release it slowly. Consequently, it is a ... Διαβάστε περισσότερα

Removal of Pb(II) from Aqueous Solutions by Zeolites, Porcelanite and Sands: Correlation of Morphology and Chemical Composition to Batch Removal Efficiency Author(s) Fawwaz Jumean1*, Lucia Pappalardo1, Hani Khoury2 Affiliation(s) 1Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah, Sharjah, United Arab Emirates. 2Department of Geology, The University of Jordan, Amman, Jordan. ABSTRACT Chemical compositions of natural zeolites, porcelanite (opal-CT) and local sands were determined by X-ray fluorescence (XRF) and correlated with their Pb(II) removal efficiencies. Zeolites and porcelanite were from the Mikawer, Aritain and Hannon areas in Jordan. Sands (white, red and yellow) were from the United Arab Emirates (UAE). ... Διαβάστε περισσότερα

Proton Adsorption Selectivity of Zeolites in Aqueous Media: Effect of Exchangeable Cation Species of Zeolites Moses Wazingwa Munthali *, Erni Johan and Naoto Matsue Department of Life Environmental Conservation, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan; E-Mails: Johan@agr.ehime-u.ac.jp (E.J.); matsue@agr.ehime-u.ac.jp (N.M.) Abstract: The saturation of negative charges of zeolites by specific cations to modify their physicochemical and catalytic properties has broadened the applications of zeolites. The adsorption behavior of H+ to Li+, Na+, K+, Rb+ and Cs+-saturated Linde-type A, Na-P1, mordenite, X type and Y type zeolites was evaluated at different pH-pM, where pH-pM is equal to ... Διαβάστε περισσότερα