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Experiments with unimetallic solutions revealed that <jats:italic>E. andevalensis<\/jats:italic> and <jats:italic>R. idaeus<\/jats:italic> extracts could separate about 70% of Pd and less than 40% of other tested metals (Al, Ce, Fe and Pt) from the solutions. Then, application of the plant extracts to two different SACCs leachates showed that <jats:italic>E. andevalensis<\/jats:italic> and <jats:italic>R. idaeus<\/jats:italic> extracts can induce high precipitation (&gt;\u200960%) of Pd and Pt with co-precipitation of less than 20% of other metals. UV\u2013Visible spectra analysis confirmed the bio-reduction of Pd<jats:sup>2+<\/jats:sup> ions into Pd<jats:sup>0<\/jats:sup> nanoparticles by <jats:italic>R. idaeus<\/jats:italic> extract, and Fourier transform infrared spectroscopy (FTIR) analysis revealed the contribution of functional groups of the phytochemicals present in the extract (such as phenols, flavonoids and anthocyanins) in the Pd<jats:sup>2+<\/jats:sup> bio-reduction and stabilization. Afterward, scanning electron microscopy with energy-dispersive X-ray spectroscopy (SEM\u2013EDX) analysis of the precipitate obtained from one leachate with <jats:italic>R. idaeus<\/jats:italic> extract demonstrated the presence of Pd particles along with organic compounds and particles containing other metals. Therefore, particles were subjected to a washing step with acetone for further purification. Finally, scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy (STEM-EDX) analysis showed the high purity of the final Pd particles and high-resolution STEM allowed to determine their size variation of 2.5 to 17\u00a0nm with an average Feret size of 6.1\u00a0nm and confirmed their crystalline structure with an interplanar lattice distance of\u2009~\u20090.22\u00a0nm. This green approach offers various benefits including simplicity of Pd separation from the leachates as valuable nanoparticles that makes the process more feasible from economic and environmental standpoints. A process cost of\u2009~\u200920 $\/g of Pd particles recovered was estimated (excluding manpower).<\/jats:p>\n                <jats:p><jats:bold>Graphical abstract<\/jats:bold><\/jats:p>","DOI":"10.1007\/s10098-023-02523-1","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T05:02:35Z","timestamp":1681362155000},"page":"2707-2726","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Recovery of catalytic metals from leaching solutions of spent automotive catalytic converters using plant extracts"],"prefix":"10.1007","volume":"25","author":[{"given":"Amir","family":"Nobahar","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0675-2716","authenticated-orcid":false,"given":"Jorge Dias","family":"Carlier","sequence":"additional","affiliation":[]},{"given":"Maria Clara","family":"Costa","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2023,4,13]]},"reference":[{"key":"2523_CR1","doi-asserted-by":"publisher","first-page":"105349","DOI":"10.1016\/j.resconrec.2020.105349","volume":"166","author":"T Abo Atia","year":"2021","unstructured":"Abo Atia T, Wouters W, Monforte G, Spooren J (2021) Microwave chloride leaching of valuable elements from spent automotive catalysts: Understanding the role of hydrogen peroxide. 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