Electrochemistry as a tool for improved circular economy of metals

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Abstract

Traditional hydrometallurgical processes for metal production and recovery like are facing the challenges of economic and environmental concerns. Tailored electrochemistry can be considered being one of the most promising technologies to address challenges related to feasible metal recovery from dilute or impure solutions. The direct usage of clean electricity during electrochemical metal recovery can decrease the use of CO2 intensive chemicals and achieve higher holistic energy efficiency as losses due to chemical synthesis or preparation steps can be avoided. Recently, an innovative electrochemical method – electrodeposition and redox replacement (EDRR) – was proposed by the research group of Hydrometallurgy and Corrosion at Aalto University, for the valorization of valuable elements with trace concentration from hydrometallurgical solutions. To date, the recovery of silver, gold, platinum, and tellurium with low concentration (mg/L or μg/L level) from various complex hydrometallurgical solutions by EDRR have been investigated. Moreover, recent studies have demonstrated the versatility of EDRR to product high value-added metallic materials like nanoparticles, dendrites and alloy coatings. Unlike traditional electrodeposition, the EDRR method does not involve any complexing agents and the currently underutilized hydrometallurgical solutions or waste streams can be used as liquid raw materials in the production. All these previous studies suggest EDRR as an innovative method and a promising approach to achieve efficient metal recovery and/or sustainable direct manufacturing of metallic coatings. In this paper, the advances of the application of EDRR are summarized to highlight electrochemistry as a tool for improved circular economy of metals.
Original languageEnglish
Title of host publicationPROCEEDINGS 5th PLATE Conference
EditorsKirsi Niinimäki, Kirsti Cura
PublisherAalto University
Pages1141-1147
ISBN (Electronic)978-952-64-1367-9
Publication statusPublished - 2023
MoE publication typeB3 Non-refereed conference publication
EventProduct Lifetimes and the Environment - Aalto University, Espoo, Finland
Duration: 31 May 20232 Jun 2023
Conference number: 5
https://www.plateconference.org/plate-2023-conference/

Publication series

NameAalto University publication series ART + DESIGN + ARCHITECTURE
Number3
Volume2023
ISSN (Electronic)1799-4861

Conference

ConferenceProduct Lifetimes and the Environment
Abbreviated titlePLATE
Country/TerritoryFinland
CityEspoo
Period31/05/202302/06/2023
Internet address

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