Title

METAL IDENTIFICATION BY MEANS OF ICP-OES IN RECYCLING COMMINUTED PRINTED CIRCUIT BOARDS

METAL IDENTIFICATION BY MEANS OF ICP-OES IN RECYCLING COMMINUTED PRINTED CIRCUIT BOARDS

Authorship

Damasco, Astrid; Souza, Cláudia M. G. de

Damasco, Astrid

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Souza, Cláudia M. G. de

I am this author

DOI

10.5151/2594-5327-39672

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Abstract

At present, the growth in population along with the great industrial development is exceeding the capacity of environment adaptation, not managing to comport all the different types of equipment and waste disposed in the natural cycle. Among the discarded equipment stands a large volume of printed circuit boards, in which recycling processes are still incomplete, thus the main source of motivation for this research. Using assembled and nude printed circuit boards, subjected to the same process of comminution and leaching, we analyzed the particle size obtained in the amount of metal identified by ICP-OES. The results showed that the assembled plates contained larger particles than the bare boards, containing 25.8% and 6.8% metal, respectively, and the particle sizes interfered in the leaching process used for extraction and identification of the metals by ICP -OES,with higher concentrations of metal in the particles around 600 μm.

At present, the growth in population along with the great industrial development is exceeding the capacity of environment adaptation, not managing to comport all the different types of equipment and waste disposed in the natural cycle. Among the discarded equipment stands a large volume of printed circuit boards, in which recycling processes are still incomplete, thus the main source of motivation for this research. Using assembled and nude printed circuit boards, subjected to the same process of comminution and leaching, we analyzed the particle size obtained in the amount of metal identified by ICP-OES. The results showed that the assembled plates contained larger particles than the bare boards, containing 25.8% and 6.8% metal, respectively, and the particle sizes interfered in the leaching process used for extraction and identification of the metals by ICP -OES,with higher concentrations of metal in the particles around 600 μm.

Keywords

Printed circuit board, Comminution, Recycling.

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