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Environmental Colloid and Interface Engineering Lab
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A lab that investigates how fine particles in water stick together.
AboutAbout the lab
Understanding particle aggregation from the fundamentals
The Environmental Colloid and Interface Engineering Lab studies aggregation, the process by which fine particles called colloids suspended in water stick together to form larger clumps.
In water purification, the surface properties of fine clay and organic particles mixed into river and lake water are adjusted so that they stick to one another and grow into large clumps called flocs, which are then separated out.
This process is related not only to water purification but also to the formation of tidal flats and estuarine deltas, fermentation processes, and papermaking and food manufacturing.
Much of the experimental equipment is built in-house, and the lab's website presents this as one of its distinctive features.
Key terms
- Colloid
- Extremely fine particles suspended in a medium such as water. Fine clay and organic particles are examples.
- Aggregation
- The process in which fine particles in water stick to one another and form larger clumps.
- Floc
- A large clump formed when fine particles stick together and grow. Also called an aggregate.
NewsLab news
A paper on the charging and aggregation of nanoclay was selected as an Editor's Choice Article in the journal Nanomaterials
A doctoral student received the Excellent Poster Award at the annual meeting of the Japanese Society of Soil Physics
A doctoral student received the Excellent Poster Presentation Award at the 73rd Annual Meeting of the Society of Rheology, Japan
A doctoral student received the Young Researcher Oral Presentation Award at the 76th Symposium on Colloid and Interface Chemistry
ResearchResearch themes
The aggregation of fine particles in water is common to many fields, including water purification, the water environment, fermentation, and food manufacturing. The lab aims to elucidate the dynamic process of aggregation that these fields share.
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MembersFaculty
The members of the Environmental Colloid and Interface Engineering Lab consist of faculty members, emeritus professors, researchers, doctoral, master's, and undergraduate students, research students, and technical assistants.As of 2026
- Associate ProfessorMotoyoshi Kobayashi
- Assistant ProfessorTakuya Sugimoto
- Assistant ProfessorLester Geonzon Canque
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: “Jardine Water Purification Plant 2022” Sea Cow / CC BY-SA 4.0 (cropped)
- Elucidating the colloid aggregation process: “Colloid lithography, artificial opal, polystyrene” Simpik / CC BY-SA 4.0 (cropped)
- Related lab (Soil Environmental Chemistry Lab): “CSIRO ScienceImage 712 Soil Profiling India” T.Grove, CSIRO / CC BY 3.0 (cropped)
- Related lab (Water Resources and Environmental Engineering Lab): “Last mile irrigation- Pipe to field in Raichur, Karnataka, India” User: Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Related lab (Aquatic Environment Ecological Engineering Lab): “Lake water uptake” Ahom04 / CC BY-SA 4.0 (cropped)
- Related lab (Watershed Management Lab): “Wet Winter in the Mississippi River Basin (MODIS )” MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
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