PHYSICAL CHEMISTRY CHARACTERIZATION OF PRINTED CIRCUIT BOARD OF MOBILE PHONES
| Autor: | Hellington Bastos da Silva de Sant’ana, Francisco José Moura, Hugo Marcelo Veit |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Tecnologia em Metalurgia, Materiais e Mineração, Vol 10, Iss 3, Pp 231-239 (2015) |
| Druh dokumentu: | article |
| ISSN: | 2176-1515 2176-1523 |
| DOI: | 10.4322/tmm.2013.033 |
| Popis: | Nowadays, electronics industry is the leading sector in developing new technologies. These new technologies lead to cheaper products increasing the consumption. The lifetime of such products is relatively short and soon it becomes waste, known as electronic waste. Cell phone is a common electronic waste. This waste represents an interesting raw material, because it contains large amount of base metals, considerable amount of valuable metals and also those dangerous. In this work, the electronic waste was submitted to mechanical processing: initially the devices were separated into two categories, as year of release (2002) and disassembled manually. The printed circuit boards were milled below 1 mm and then submitted to density and magnetic separation processes. The fractions obtained during the mechanical processing were characterized by chemical analysis. Using mechanical processing it was possible to obtain metal fractions of 80 wt%. A leaching test was carried out to determine if a waste needs to be managed as a hazardous; so that, cell phone waste must be considered in the category of hazardous residue because the lead concentration was above the limit established by Brazilian Standards |
| Databáze: | Directory of Open Access Journals |
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