Document type
Journal articles
Document subtype
Full paper
Title
Recycling of Palladium from Spent Catalysts Using Solvent Extraction—Some Critical Points
Participants in the publication
Ana Paula Paiva (Author)
Dep. Química e Bioquímica
CQB
Summary
Electrical and electronics equipment and automotive and industrial catalysts are some examples of top technological devices whose functioning rely on the use of platinum-group metals (PGMs). The PGMs' high economic value and difficult to replace technological properties, together with their scarcity in the Earth's crust, justify concerns about their critical condition and reinforce the importance of developing recycling practices for PGM end-of-life materials. This article presents and discusses recent advances regarding the use of hydrometallurgical solvent extraction to recover one PGM, palladium, from spent catalysts. Two different tendencies are implicit in the literature concerning Pd(II) extraction: a few groups focus on the adjustment and optimization of current commercial extractants, while others prefer to design new extracting compounds. Actually, the leach solutions obtained from the treatment of anthropogenic materials generally exhibit different compositions when compared to those coming from the primary resources. The pros and cons of both approaches are critically discussed, and the assumptions backing some of the reported achievements are also appraised.
Where published
METALS, article 505
Publication Identifiers
ISSN - 2075-4701
Address
MDPI, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
Publisher
MDPI AG
Document Identifiers
URL -
http://dx.doi.org/10.3390/met7110505
DOI -
https://doi.org/10.3390/met7110505
Rankings
SCOPUS Q2 (2017) - 0.55 - General Materials Science
SCOPUS Q2 (2017) - 0.55 - General Materials Science
Web Of Science Q2 (2017) - 1.704 - METALLURGY & METALLURGICAL ENGINEERING - SCIE
SCIMAGO Q2 (2017) - 0.55 - Materials Science (miscellaneous)