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dc.contributor.authorBenzal Montes, Eva
dc.contributor.authorSolé Sardans, Maria Montserrat
dc.contributor.authorLao Luque, Concepción
dc.contributor.authorGamisans Noguera, Javier
dc.contributor.authorDorado Castaño, Antonio David
dc.contributor.authorCano Larrotta, Ana María José Candelaria
dc.contributor.otherUniversitat Politècnica de Catalunya. Doctorat en Recursos Naturals i Medi Ambient
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC
dc.identifier.citationBenzal, E. [et al.]. Copper recovery from PCBs by Acidithiobacillus ferrooxidans: toxicity of bioleached metals on biological activity. "Waste and biomass valorization", 1 Abril 2020, v. 11, n. 10, p. 5483-5492.
dc.descriptionThis is a post-peer-review, pre-copyedit version of an article published in Waste and Biomass Valorization. The final authenticated version is available online at:
dc.description.abstractThe suitability and limits of bioleaching for copper recovery from printed circuits boards has been stated with new strategies and methodologies. The process has been tested using a continuous column reactor simulating those conditions found at industrial scale. The new strategy developed improved the kinetic reaction rate and overcomes transport limitations for the leaching solution, thus improving copper recoveries from 50 to 80% in only 6 h. This drastically reduced the time required by previous studies to achieve the same copper recovery. Inhibition effects of the biological process due to the release of metals from e-waste has been identified by means of microrespirometric monitoring tests. This systematic study allowed identifying that nickel, copper and aluminum impact the microorganisms’ activity, inactivating them in specific scenarios (depending on the concentration and the time exposed). Including the time exposure as variable, this work demonstrated that metal concentrations that have been reported as non-toxic to microorganisms, resulted toxic when the required leaching contact time was considered. Besides high iron concentrations also produce inhibitory effect on the microorganisms’ growth, despite being the energy source for their metabolism.
dc.description.sponsorshipThis work has been founded by the Project 2016LLAV00034 and 2018PROD00097 founded by AGAUR and FEDER funds. Eva Benzal gratefully acknowledges a FPU-2014 predoctoral scholarship from Ministerio de Educación, Cultura y Deporte (Spain) and co-financed by FEDER funds.
dc.subjectÀrees temàtiques de la UPC::Enginyeria química::Biotecnologia
dc.subject.lcshElectronic waste
dc.subject.lcshMicrobial biotechnology
dc.subject.lcshBacterial leaching
dc.subject.lcshPrinted circuits
dc.subject.otherBiological leaching
dc.subject.otherElectronic waste
dc.subject.otherPrinted circuit boards
dc.titleCopper recovery from PCBs by Acidithiobacillus ferrooxidans: toxicity of bioleached metals on biological activity
dc.subject.lemacResidus electrònics
dc.subject.lemacBiotecnologia microbiana
dc.subject.lemacCircuits impresos
dc.contributor.groupUniversitat Politècnica de Catalunya. BIOGAP - Grup de Tractament Biològic de Contaminants Gasosos i Olors
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/AGAUR/PRI2010-2013/2018 PROD 00097
local.citation.authorBenzal, E.; Sole, M.; Lao, C.; Gamisans, X.; Dorado, A.D.; Cano, A.
local.citation.publicationNameWaste and biomass valorization

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