Application of solid-liquid extraction with organic acids for recovery of precious metal from technological waste in disuse
DOI:
https://doi.org/10.31686/ijier.vol8.iss8.2531Keywords:
Obsolete technological waste, Leaching, Gold, MicroprocessorsAbstract
The electro and electronic industry has been increasing gradually, causing an increase in the generation of waste of electrical and electronic equipment, which have several components that have added value such as - for example - gold. Aiming at environmental protection, measures are sought for the recovery of these metals, through tests with several technologies such as leaching. This consists in separating the component from the solid part, transferring it to the liquid part, using acids. It is necessary to study acids that are less harmful to the environment. Thus, microprocessors of obsolete computers were collected, their characterization was carried out and the elements present in the pins were identified. After the characterization, the leaching stage was carried out, firstly with aqua regia; then with acetic and citric acids. The leaching results presented about 10 mg / L of gold with aqua regia and about 0.5 mg / L with citric acid.
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References
N. Gouveia, Resíduos sólidos urbanos: impactos socioambientais e perspectiva de manejo sustentável com inclusão social. Ciência & Saúde coletiva, 2012, pp. 1503-1510. DOI: https://doi.org/10.1590/S1413-81232012000600014
H.Y. Wang, A study of the effects of LCD glass sand on the properties of concrete. Waste Management, 2008, pp. 335-341. DOI: https://doi.org/10.1016/j.wasman.2008.03.005
I.C. Nnorom, J. Ohakwe and O. Osibajnjo. Survey of willingness of residents to participate in electronic waste recycling in Nigeria – A case study of mobile phone recycling. Journal of Cleaner Production, 2009, pp. 1629–1637. DOI: https://doi.org/10.1016/j.jclepro.2009.08.009
I.D. Williams, F.O. Ogondo and T. J. Cherrett, How are WEEE doing? A global review of the management of electrical and electronic wastes. Waste Management, 2011, pp. 714–730. DOI: https://doi.org/10.1016/j.wasman.2010.10.023
ONUBR. Digital Archive. Available at: <https://bit.ly/2FJCB3Q/>. Access in: Jan 17, 2018.
Ministério do Meio Ambiente. Política Nacional de Resíduos Sólidos. Available at: <https://bit.ly/2R2hnj8>. Access in Nov 21, 2018. DOI: https://doi.org/10.4322/2359-6643.08010
C.J. Geankoplis, Transport Processes and Unit Operations. USA. Editora Prentice-Hall International Inc. 3ª edição, 1993.
L.N. Cortes, C.O. Calgaro, M. Cella, G.Reske. D. Bertuol and E.H. Tanabe. Recuperação de ouro de microprocessadores descartados. XX Congresso Brasileiro de Engenharia Química, Florianópolis - SC, 2014, pp. 1-6. DOI: https://doi.org/10.5151/chemeng-cobeq2014-1450-19235-155417
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Copyright (c) 2020 Antonio dos santos, Dinalva Schein, Mauro Cesar Marchetti, Estela Bresolin Pereira, Arthur Rolim Stasiak
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Accepted 2020-07-18
Published 2020-08-01
