Department of Chemical and Metallurgical Engineering

Hydrometallurgy and Corrosion (Hydromet)

The research group Hydromet, led by Prof. Mari Lundström, applies hydrometallurgical and electrochemical means for the recovery of metals and precious materials, development of electrolysis processes, study of corrosion properties and development of new materials from secondary raw materials.
Precious metals in crushed batteries being dissolved in a test tube. Photo: Glen Forde/Aalto Energy Platform

Our research areas:

  1. Hydrometallurgical processing of primary and secondary raw materials - from fundamental phenomena to process design with environmental impact evaluation
  2. Electrochemistry - electrochemical metal recovery, characterization, as well as corrosion processes
  3. Utilizing secondary raw materials for the development of new processes and materials in circular economy of metals

The research group is dedicated to enabling sustainable living for future generations. As a result of the increased utilisation of electrification, automation, renewable energy solutions and the continued rise in living standards, numerous challenges related to the primary production and circular economy of metals have appeared.

By a combination of the theoretical understanding of hydrometallurgy, electrochemistry, corrosion prevention, process development, process modelling, LCA analysis and state of the art analysis techniques, our researchers are at the forefront of sustainable industrial-scale process development.

Furthermore, Hydromet’s extensive collaboration with a wide variety of industrial and academic stakeholders enables the pioneering of new innovative solutions for these crucial global challenges.

Solar cell component on wood bark on ice crystals
Nordic photovoltaics using plant-based materials

The demand for metals and other raw materials is expected to rise drastically in part as the world transitions towards more sustainable energy solutions. The use of renewable energy sources requires lithium ion batteries, photovoltaic cells and wind energy – complex products that are also highly metal intensive. Our research group aims to be at the forefront of the metals circular economy through development of efficient primary processes and by improving the recycling of end-of-life materials.

Hydromet Projects

The ongoing and past projects from Hydromet group can be found here.

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Future lithium ion battery life cycle

Hydromet Facilities

Find an introduction to our facilities here.

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Mari Lundström

Latest Hydromet news:

Find here our latest activities.

Professor Mari Lundström with Tesla / Photo: Pertti Kauranen
Press releases Published:

Prof. Mari Lundström featured in Millenium Talks

Host Henkka Hyppönen and Assistant Professor Mari Lundström discuss possibilities and challenges in recycling of batteries at the laboratories of Hydrometallurgy and Corrosion.
Mari Lundström
Cooperation Published:

Hydromet group at BATCircle Seminar in Pori 3.9.2019

The first BATCircle Seminar was held in University Consortium of Pori. Prof. Lundström and the group's researchers workingwith LIB recycling, process design and primary processing attended the seminar.
BatteRIes Europe
Cooperation Published:

Hydromet at BatteRIes Europe in Brussels 24.6.2019

ETIP BatteRIes Europe officially launched at Brussels on 24.6.2019. The platform brings together all relevant stakeholders in the European batteries research and innovation ecosystem in order to develop and support a competitive battery value chain in Europe.
BATCircle logo
Research & Art Published:

BATCircle featured in Materia magazine

Aalto led Finland- based Circular Ecosystem of Battery Metals was featured in the newest Materia Magazine (2/2019 May)

Events:

Battery recycling_photo Valeria Azovskaya

BATCircle – Circular ecosystem of battery metals

Learn more about responsible sourcing, refining and production of active battery materials as well as efficient recycling of end-of-life batteries needed for ongoing energy and mobility transitions.

Events

Latest publications:

Recovery of nickel from the pregnant leach solution of spent NMC batteries using Versatic acid 10 and mixer-settler operations

Amit Barnwal, Andrea Locati, Maja Mikulic, Mari Lundström, Benjamin P. Wilson, Jere Partinen, Alexander Chernyaev, Roshan Budhathoki, Martina Petranikova 2026 Separation and Purification Technology

Lithium-ion batteries recycling: Review of reactor and process design, scalability, cost, and environmental performance

Safae Benaabidate, Nabil El Mounafia, Saeed Rahimpour, Szabolcs Fogarasi, Karima Lasri, Benjamin P. Wilson, Ana-Maria Cormos, Yassine Taha, Rachid Hakkou, Ismael Saadoune, Abdelghafour Zaabout 2026 Journal of Energy Storage

Integrated acid leaching of spent battery cathode material (LCO, NMC111) and flotation tailings of pyrite and pyrrhotite

Anssi Karppinen, Henna Liljanko, Sipi Seisko, Mari Lundström 2026 Hydrometallurgy

Characterization of a precipitate sludge from a sulfuric acid plant

Simon P. Michaux, Alan R. Butcher, Duncan Pirrie, Jarno Mäkinen, Mari Lundström, Petri Latostenmaa, Jesal Hirani, Nikolaos Apeiranthitis, Tero Korhonen, Matthew R. Power 2026 Minerals Engineering

An integrated study on pyrolysis, flotation, and leaching for optimized recycling of industrial battery materials

Gulsah Tas, Jere Vänskä, Natalia Araya-Gomez, Jere Partinen, Anna Klemettinen, Mari Lundström, Rodrigo Serna-Guerrero 2026 Minerals Engineering

Impact of different lixiviants on leach residue graphite during hydrometallurgical battery recycling

Yuanmin Zou, Reima Herrala, Tiia-Maria Porkola, Anna Varonen, Benjamin P. Wilson, Mari Lundström 2026 Journal of Power Sources Advances

Prospective Life Cycle Assessment of a Battery Recycling Process with Organic Modeling

Diana Arellano, Marja Rinne, Benjamin P. Wilson, Mari Lundström 2025 Ni‐Co 2025, 6th International Symposium on Nickel and Cobalt. NICO 2025.

Life cycle assessment of LTO-rich anode waste from lithium-ion battery with a hazardous waste management approach

Diana Arellano Sanchez, Marja Rinne, Benjamin P. Wilson, Mari Lundström 2025 Resources, Conservation and Recycling

Life cycle assessment of enhanced materials recovery from LTO-rich anode waste recycling via froth flotation

Diana Arellano-Sanchez, Marja Rinne, Luis Arturo Gomez-Moreno, Benjamin P. Wilson, Rodrigo Serna Guerrero, Mari Lundström 2025 Minerals Engineering

Life Cycle Assessment of Mo, V, Ni, and Co Recovery from Spent Catalyst

Riina Aromaa-Stubb, Marja Rinne, Mari Lundström 2025 ACS Sustainable Resource Management
More information on our research in the Aalto research portal.
Research portal
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