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Iizuka-Ho Lab
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A lab that makes the circulation of resources and CO2 more efficient while also advancing environmental remediation.
AboutAbout the lab
Making the circulation of resources and CO2 more efficient, while also cleaning up the environment!
Iizuka-Ho Lab studies technologies for circulating resources and carbon dioxide, as well as technologies for environmental remediation.
Using materials such as steel slag and waste concrete, the lab converts carbon dioxide into stable carbonates, leading to its storage and effective use.
In water treatment, the lab works with remediation materials made from concrete-based materials and with electrochemical methods that use membranes.
It is a relatively new lab, established in April 2023.
Key terms
- Carbonate mineralization
- A reaction in which carbon dioxide reacts with oxides of calcium, magnesium, and similar elements to form stable carbonates.
- Steel slag
- A by-product of the iron-making process. It is used as a raw material for carbonate mineralization.
- Electrodialysis
- A method that uses membranes and electricity to move ions in water, removing or concentrating them.
NewsLab news
A paper by Professor Iizuka and Assistant Professor Ho was selected as a Top Cited Article
Assistant Professor Ho received the Tokin Science and Technology Award for fiscal 2025
A paper that Professor Iizuka was involved in received the Paper Award of the Mining and Materials Processing Institute of Japan
A student won the Gold Award in the poster presentation of the Tohoku Branch Young Members' Group of the Mining and Materials Processing Institute of Japan
A fourth-year undergraduate student won the Silver Award at the 2nd Katsura Fukumaru Cup
ResearchResearch themes
The lab aims to make the circulation of resources and carbon dioxide more efficient while also advancing environmental remediation. It works on carbonate mineralization technology, wastewater treatment, the use of seawater resources, and turning wastewater and waste from the semiconductor industry into resources.
*Illustrative imageCarbonate mineralization technology
When carbon dioxide reacts with calcium or magnesium oxides, stable carbonates form. Using industrial by-products such as steel slag, waste concrete, and coal ash, as well as mine drainage and seawater, as raw materials, the lab studies how to build circulation loops that lead to carbon dioxide storage and effective use.
*Illustrative imageEnvironmental remediation and wastewater treatment
The lab researches and puts into practical use environmental remediation materials made from concrete-based materials, which can be used to remove or neutralize anions such as phosphate in water. In electrodialysis with bipolar membranes, ions can be removed or concentrated by changing the pH without adding chemicals.
*Illustrative imageUse of seawater resources
The lab develops carbonate mineralization technology that uses seawater, as well as resource circulation technology combined with seawater use. It also works on resource circulation of brine, the concentrated salt water left over when seawater is desalinated.
*Illustrative imageWastewater and waste from the semiconductor industry
The lab studies methods for treating semiconductor industry wastewater using recycled materials. It also develops technologies that turn wastewater and waste into resources.
MembersFaculty
The members of Iizuka-Ho Lab consist of faculty members, doctoral, master's, and undergraduate students, and research support staff.As of 2026
- ProfessorAtsushi Iizuka
- Assistant ProfessorHsing-Jung Ho
VoicesStudent voices
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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: “ČBu, wastewater treatment plant 02” Czeva / CC BY-SA 4.0 (cropped)
- Carbonate mineralization technology: “Calcite (calcium carbonate) with marcasite at Melbourne Museum” Ethmostigmus / CC BY-SA 4.0 (cropped)
- Environmental remediation and wastewater treatment: “Aeration tank activated sludge process STP Bengaluru India” Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Use of seawater resources: “Marakkanam Salt Pans” Dey.sandip / CC BY 3.0 (cropped)
- Wastewater and waste from the semiconductor industry: “Minimal Fab exhibit at Tsukuba Science Square” Syced / CC0 (cropped)
- Related lab (Watanabe-Wang Lab): “Sasso 2 Geothermal Power Plant” T. AGEMAR / CC BY 4.0 (cropped)
- Related lab (Okamoto-Oyanagi Lab): “00 3571 Geothermal power plant in New Zealand” W. Bulach / CC BY-SA 4.0 (cropped)
- Related lab (Chien-Han Lab): “OR )” U.S. Department of Energy from United States / Public domain (cropped)
- Related lab (Sakaguchi-Satomi-Sueyoshi Lab): “GeysersGeothermalDrilling1977” Max Crittenden / Public domain (cropped)
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