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It is shown that the manufacture of large-sized parts from fiberglass using transfer molding technologies allows solving technical problems, the implementation of which is impossible with the help of other materials. The development of available technologies and equipment for the effective disposal of such products will make it possible to classify fiberglass as the materials of the sixth technological order.
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Research has been carried out on the synthesis of ceramic matrices based on zirconium-enriched pyrochlore for the immobilization of high-level waste (HLW) by the method of self-propagating high-temperature synthesis (SHS) in an SHS reactor under argon and compressed air pressure. The dependences of the phase composition and characteristics of the crystalline phases of the material on the gas pressure have been established. It is shown that all rare-earth elements (REE) (Ce
4+ , La
3+ ) from the model HLW mixture are incorporated into the ceramic structure. Elemental analysis showed that lanthanides are concentrated in the structures of perovskite and pyrochlore.
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The properties and advantages of fiberglass and carbon fiber reinforced plastics, as well as the directions of their use in the construction of vehicles are considered. The possibility of increasing the utilization of vehicles at the design stage through the use of easily recyclable materials is discussed. The analysis of the known methods of handling fiberglass waste is carried out and the need to develop effective industrial technologies for the disposal of these materials is shown.
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Iron-containing catalytic systems based on nanoporous aluminosilicates obtained by the sol-gel method have shown high activity and stability in the reaction of oxidative de-structuring of azo dye by hydrogen peroxide in aqueous solutions and can be recommended for the neutralization of wastewater containing impurities of organic dyes.
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Hits: 16651
A method is presented for obtaining silver-containing iodine sorbents by applying silver to porous cellular ceramics by chemical reduction from a solution and then converting it into an oxidized form. The thermal stability of some silver compounds has been studied. An assessment is made of the sorption capacity of the obtained composite sorbents containing various silver compounds in relation to radioactive methyl iodide
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Flat membrane contactors have been obtained, which are ceramic disk micro-filtration membranes with a Co
3 O
4 layer applied. Such characteristics as the layer thickness, pore size distribution were determined, and the specific surface area of ??the substrate and the applied Co
3 O
4 layer was estimated. It has been shown that the obtained membrane contactors are suitable for carrying out liquid-phase catalytic oxidation of phenol under mild conditions, including wastewater.
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Hits: 17954
The possibility of using wastes of concentration of iron ore deposits for the production of ceramic products has been investigated. The composition of ceramic masses, their properties and technological parameters of the production of articles are given. To improve the quality of products, nepheline concentrate was additionally used as an alkali-containing component.
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Hits: 21230
Possibilities of improving the electroflotation technology of wastewater treatment at enterprises of the ceramic industry are considered. Solutions related to the action of flocculants, optimization of the design of the electroflotation apparatus and modes of its operation are analyzed. It is shown that the use of new approaches can improve the efficiency of wastewater treatment, reduce energy costs and ensure compliance with the requirements of the best available technologies established for large enterprises for the production of ceramic products.
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Hits: 21246
On the basis of the use of household and industrial cullet, red clay and organic additives, an environmentally friendly technology has been developed for producing glass-ceramic material - granular filtering foam glass-ceramic. Presented are laboratory and operational tests of the obtained filter material, its suitability for purification of various types of water. The complex of oxides and hydroxides obtained on the surface of glass-ceramic granules makes it possible to remove iron and manganese from water.
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The analysis of the prospects for the introduction of the best available technologies at enterprises producing glass and ceramics in Russia. The modernization of the factories has contributed to the improvement of environmental performance and energy efficiency. The participation of specialized enterprises in identifying the best available technologies and determining the procedure for issuing integrated environmental permits will minimize the risks of transition to a new system of environmental regulation.
