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Resource Processing and Environmental Remediation Engineering Lab
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The lab researches recovering valuable metals from mineral resources and remediating environmental pollution.
AboutAbout the lab
Creating environmentally harmonious technologies that connect resources and materials
The Resource Processing and Environmental Remediation Engineering Lab researches resource processing technologies for turning mineral resources and urban mining waste into materials, as well as technologies for remediating water and soil pollution caused by resource development.
Through three groups, mineral processing (flotation), hydrometallurgy (leaching), and environmental remediation, the lab carries out research covering metal resource processing from upstream to downstream.
The research combines knowledge from many fields, including powder technology, interfacial chemistry, electrochemistry, mineralogy, bioengineering, and molecular biology.
With the mission of building a recycling-oriented society, the lab aims to propose new resource processing and environmental remediation technologies with a low environmental burden.
Key terms
- Urban mining
- Viewing the valuable metals contained in used products such as electronic circuit boards, spent catalysts, and batteries as resources available above ground.
- Flotation
- A mineral processing technique for separating target minerals from natural mineral resources (froth flotation).
- Hydrometallurgy
- A technology for recovering valuable metals from mineral resources and urban mining resources. Leaching is the operation within it that dissolves metals into a liquid.
- Passive treatment
- A water treatment method used for purposes such as removing toxic metals contained in smelting waste liquids and mine drainage.
NewsLab news
A master's student received a Presentation Award at Kyushu MMIJ 2026
A student received the Best Presentation Award at CINEST 2025
A master's student received the Excellent Poster Award at the 143rd Academic Meeting of the Society of Environmental and Resource Engineering
A master's student received an Excellence Award at Kyushu MMIJ 2025
A master's student received the Best Presentation Award at CINEST 2024
ResearchResearch themes
With the mission of building a recycling-oriented society, the lab carries out research covering metal resource processing from upstream to downstream, based on three pillars: mineral processing, hydrometallurgy, and environmental remediation. Each of the three groups conducts basic and applied research, covering a wide range from lab-scale tests to practical implementation tests based on industry-academia collaboration.
*Illustrative imageDeveloping advanced flotation technologies
The lab develops advanced flotation technologies for natural mineral resources, including seafloor resources. It proposes a new Green Flotation method that modifies mineral particles with harmless organic acids and nanoparticles.
*Illustrative imageLeaching methods with a low environmental burden
The lab develops hydrometallurgical technologies for recovering valuable metals from natural mineral resources as well as from urban mining resources such as electronic circuit boards, spent catalysts, and batteries. It proposes new methods with a low environmental burden, such as bioleaching.
*Illustrative imagePurification technologies for waste liquids and mine drainage
Among water treatment methods aimed at removing toxic metals from smelting waste liquids and mine drainage and recovering valuable metals, the lab focuses on developing passive treatment technologies. It designs new reactions from multiple angles, including bioprocesses.
MembersFaculty
The members of the Resource Processing and Environmental Remediation Engineering Lab consist of faculty, academic researchers, technical staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorNaoko Okibe
- Associate ProfessorHajime Miki
- Associate ProfessorGde Pandhe Wisnu SUYANTARA
- Assistant ProfessorKeishi Oyama
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Froth Flotation Plant at Argonne” Argonne National Laboratory's Flickr page / CC BY-SA 2.0 (cropped)
- Developing advanced flotation technologies: “Flotation cell” Dhatfield / CC BY-SA 3.0 (cropped)
- Leaching methods with a low environmental burden: “NRC Uranium Heap Leach” US Nuclear Regulatory Commission / Public domain (cropped)
- Purification technologies for waste liquids and mine drainage: “Gladstone Water Treatment Plant ( )” USEPA Environmental-Protection-Agency / Public domain (cropped)
- Related lab (岩盤・開発機械システム工学研究室): “Boron mine pit” Marcin Wichary / CC BY 2.0 (cropped)
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- Related lab (物理探査学研究室): “Alessio-gusmeroli-uaf-conducts-geophysical-survey-of-patterned-ground-on-the-north-slope-of-alaska o ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Related lab (資源開発工学研究室): “Pumpjacks Inglewood Oil Field seen from Baldwin Hills Scenic Overlook” Jengod / CC BY-SA 4.0 (cropped)
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