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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Recycling of WEEE: Characterization of spent printed circuit boards from mobile phones and computers

Texto completo
Autor(es):
Yamane, Luciana Harue [1] ; de Moraes, Viviane Tavares [1] ; Romano Espinosa, Denise Crocce [1] ; Soares Tenorio, Jorge Alberto [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Met & Mat Engn, BR-05508030 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: WASTE MANAGEMENT; v. 31, n. 12, p. 2553-2558, DEC 2011.
Citações Web of Science: 160
Resumo

This paper presents a comparison between printed circuit boards from computers and mobile phones. Since printed circuits boards are becoming more complex and smaller, the amount of materials is constantly changing. The main objective of this work was to characterize spent printed circuit boards from computers and mobile phones applying mineral processing technique to separate the metal, ceramic, and polymer fractions. The processing was performed by comminution in a hammer mill, followed by particle size analysis, and by magnetic and electrostatic separation. Aqua regia leaching, loss-on-ignition and chemical analysis (inductively coupled plasma atomic emission spectroscopy ICP-OES) were carried Out to determine the composition of printed circuit boards and the metal rich fraction. The composition of the studied mobile phones printed circuit boards (PCB-MP) was 63 wt.% metals; 24 wt.% ceramics and 13 wt.% polymers; and of the printed circuit boards from studied personal computers (PCB-PC) was 45 wt.% metals; 27 wt.% polymers and ceramics 28 wt.% ceramics. The chemical analysis showed that copper concentration in printed circuit boards from personal computers was 20 wt.% and in printed circuit boards from mobile phones was 34.5 wt.%. According to the characteristics of each type of printed circuit board, the recovery of precious metals may be the main goal of the recycling process of printed circuit boards from personal computers and the recovery of copper should be the main goal of the recycling process of primed circuit boards from mobile phones. Hence, these printed circuit boards would not be mixed prior treatment. The results of this paper show that copper concentration is increasing in mobile phones and remaining constant in personal computers. (C) 2011 Elsevier Ltd. All rights reserved. (AU)

Processo FAPESP: 10/51009-0 - Recuperação de ouro de placas de circuito impresso de computadores obsoletos através de processo biohidrometalurgico
Beneficiário:Jorge Alberto Soares Tenório
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 08/53254-1 - Recuperação de metais de placas de circuito impresso de computadores obsoletos através de processo biohidrometalurgico
Beneficiário:Luciana Harue Yamane
Linha de fomento: Bolsas no Brasil - Doutorado