Name: VINÍCIUS COELHO NÓBREGA DA MOTTA
Publication date: 21/02/2018
Advisor:
Name |
Role |
|---|---|
| LUCIANA HARUE YAMANE | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| DANIELLA CARDOSO BUZZI | External Examiner * |
| LUCIANA HARUE YAMANE | Advisor * |
| RENATO RIBEIRO SIMAN | Co advisor * |
Summary: Waste electrical and electronic equipment (WEEE) are defined as electrical or electronic equipment, which have reached the end of their useful life and / or become outdate, becoming obsolete. The constant increase in the generation of WEEE is caused by technological advances, programmed obsolescence, the current consumerism model, among other factors. Tablets, as they were released in 2010, have become a recent type of WEEE. However, just like smartphones, laptops and desktops, they have a printed circuit board (PCI), which is the component in the electronics that concentrate the metals of economic interest. In the study, a physical and chemical characterization of the tablets was performed. The optimum copper extraction conditions were also evaluated through acid leaching using nitric acid (HNO3), as well as a mass balance for the selective precipitation of copper II. The concentration of the metals was determined by inductively coupled plasma optical emission spectrometry, (ICP OES), and copper was determined by flame atomic absorbtion spectrometry (FAAS). The physical and chemical characterization of ICP resulted in: 31% of polymers, 33% of ceramics and 36% of metals, WHERE copper corresponds to 25.76%. he percentage of copper extraction, through acid leaching in the optimum condition (solid liquid ratio of 46.7 and HNO3 in 2M concentration) was 92.02%. In the selective precipitation, using hydrogen sulphide (H2S), the percentage of precipitation was 99.56% of the leached copper.
