Rio de Janeiro: ABNT (NBR ) (In Portuguese) 7. Brazilian Association of extract from solid residues. Rio de Janeiro: ABNT (NBR ). Brazilian Association of Technical Norms, in ABNT NBR Procedure for obtention leaching extract of solid wastes (Rio de Janeiro, ), p. 16 8. ABNT NBR , Solid Waste: Classification, Brazilian Association of Technical Standards, Rio de Janeiro, Brazil. ABNT NBR , Leaching of.
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The funnel glasses from different CRT were all mixed together. The monitors were manually dismantled using tools such as pliers, screwdriver, electric saw, saw, hammer, vise. Lead Hazard Evaluation Seven CRTs monitors were submitted to the Brazilian standard leaching procedure to evaluate their hazard potential.
It is clear that recycling waste of CRT is important not only for mitigating environmental issues, but also for maximizing the value of the waste Zhang et al. The Royal Society of Chemistry, Thermochimica Actav. Samples A, B, D and F were put into the furnace with carbon graphite Figure 2 Linear thermal retraction of the formulations studied.
Best results were observed in sample F that was processed with the following parameters: The xbnt the addition the more intense this effect. Table 4 presents the results of the Raw Residue of the STD and enamel waste, showing that the residue used has a smaller particle size than the standard mass, directly aiding in the packaging factor, contributing to a better compaction. Iron oxide is known to favor reddish tones in the burned parts and by the fluxing effect in the ceramics.
Porto Alegre, RS, Brazil. Alumina is also generally associated with kaolinite, being a very characteristic mineralogical phase of clays . Revista Escola de Minas, 68 3 Energy—efficient buildings PPP, multi—annual road map and longer term strategy.
Reducing the amount of pores favoring the reduction of water absorption and the increases of the mechanical resistance. Figure 1 Index of plastic deformation by the humidity of the plasticity test by Pfefferkorn test. Therefore, it is possible to analyze the difference in the linear retraction of burning of the formulations.
Cathode abmt tube monitors were collected for these experiments; their manufacturing year varied from to All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Changing its characteristics in the finished product. A tube furnace structure was assembled to control the 1005 Fig. Publications Office of the European Union; Influence of adsorbed anions on the dehydroxylation of synthetic goethite.
After the burn, the samples were characterized by linear retraction of burning, loss of ignition, mechanical resistance to flexion diametric compression in a universal machine of mechanical tests EMIC model DL and water absorption. A history of global metal pollution. Wastes that are not characterized in the NBR should 1005 classified according to their leaching potential, which is evaluated using the NBR September 26, ; Accepted: Adapted from ABNT b.
It is a flux waste the silica base when sintered forms a liquid phase, decreases the porosity of the material, and causing a sintering faster or at a lower temperature.
Services on Demand Journal. 1005 here to submit your manuscript Future studies should evaluate the hazardousness potential of other elements such as barium and strontium.
Polluting potential of Samarco Mineração S.A. solid waste: a Germano dam case study
The ideal moisture for making these specimens is determined by the Pfefferkorn plasticity assay. The panel glass did not present any leached lead, which is logical, since no lead was found in the previous XRF Table 4. WEEE contains a significant number of precious metals, many of which are being recovered through different studies: The kinetics and reaction mechanism of the goethite transformation. Environmental profile of ceramic tiles and their potential for improvement.
The ceramic residue used in this work provided by a Brazilian company from Santa Abnh state from the process of washing and residues of enamels. For this procedure the weighings of the Standard Mass STD and also of the waste were abt out with a balance electronic mark, model SF with a maximum capacity of 10 kg. The panel component is the heaviest part and it contains elements such as barium, strontium, and yttrium.
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These devices became obsolete because of emerging technologies such as LCD, LED and plasma; thus generating a huge stockpile of e-waste worldwide. In order to open the vacuum sealed tubes, the monitors were placed behind a wooden shield and the metallic threads were removed using a set of pliers. It can be observed that the waste presents significant levels of alkaline earth metals, mainly calcium oxide this also contributes to assist the sintering of the ceramic mass in certain temperatures.
Such a productive increase demands a large amount of raw material which generates environmental problems related to the scarcity of natural resources. Cathode ray tube CRT monitors are electronic equipment mainly made of glass, polymers and metals. Utilization of waste glass to enhance physical—mechanical properties of fired clay brick.
The next step was intended to evaluate whether the lead removal had been able to convert the CRT from a hazardous waste to a non-hazardous waste according to the Brazilian regulation. In a mixture with water in a ratio of 1: To determine the ideal extrusion humidity of the formulated samples, the plasticity test is performed with the Standard Mass STDwith the following humidity percentages: Currently produced ceramic coatings are generally composed of three distinct layers: It also shows that, apart from the concentration of lead, barium, zirconium and strontium in panelthe three glass parts have similar composition.
Abstract Cathode ray tube CRT monitors are electronic equipment mainly made of glass, polymers and metals.