1. CARACTERIZAÇÃO DE DOIS TIPOS DE PILHAS: ALCALINA E ZINCO-MANGANÊS, DE ACORDO COM AS RESOLUÇÕES CONAMA N° 401/2008 E N° 430/2011.
- Author
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Martins BERETTA, Bruno, Resmini MELO, Aline, De Pellegrin CAMPOS, Débora, MORONA, Jefferson, and Malgarise BROLESI, Tatiani
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CARDIAC pacemakers , *CHEMICAL energy , *SCANNING electron microscopes , *ELECTRICAL energy , *MANGANESE dioxide , *ZINC - Abstract
The batteries convert chemical energy into electrical energy and are responsible for the operation of laptops, watches, telephones, calculators, radios and cardiac pacemakers. Alkaline cells, which are known in the art as having an inorganic base, are composed of a porous zinc anode immersed in an alkaline solution of potassium hydroxide or sodium hydroxide, and of a cathode of compacted manganese dioxide. The objective of this study was to perform physical-chemical analyzes (pH, conductivity, real color and turbidity) in three different types of batteries (alkaline and two zinc manganese) and to identify the presence of certain metals such as cadmium, lead, iron, manganese, zinc and potassium through a leaching test. The composition of the cells was also quantified and qualified by means of instrumental analyzes using X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) technique. The values found were compared with the current legislation (CONAMA, Resolution 401/2008, resolution 430/2011) where it was found that the pH, turbidity, real color, iron, manganese and zinc parameters exceeded the legal limits while the values of metals cadmium and lead have met the limits proposed by the legislation. In this way, it is fundamental that there is awareness of the society and monitoring of the responsible bodies regarding the correct disposal of the batteries, avoiding future problems, since the same ones in contact with a water course, can entail in complications to the environment. [ABSTRACT FROM AUTHOR]
- Published
- 2019