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Environmental Safety Chemistry Lab
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A lab that evaluates and reduces the environmental risks of chemical substances.
AboutAbout the lab
Thinking about the safety and security of the environment and chemicals.
The Environmental Safety Chemistry Lab conducts research on efficiently evaluating and reducing the environmental risks of chemical substances.
Building on environmental chemistry and environmental engineering, the lab studies technologies for risk assessment and risk reduction.
The lab also pursues interdisciplinary research that bridges the sciences and humanities, such as risk communication at contaminated soil sites.
The lab welcomes students interested in efficient remediation and assessment of soil contamination, the diverse behavior of chemicals in the soil environment, and risk-based management methods around contaminated sites.
On the lab's website, the lab is introduced under the names "Environmental Safety Science Lab" and "Kobayashi Lab."
Key terms
- Volatile organochlorine compounds
- Chemicals used in large quantities in dry cleaning, degreasing of machine parts, and similar applications. They have caused soil contamination through leaks and the dumping of waste liquid.
- Cohesive soil
- Sticky soil. Once contaminants penetrate it, remediation becomes difficult.
- Exposure
- People coming into contact with a chemical substance. Various routes, such as inhalation, are possible.
- Chloroethylene
- A chemical newly added to the list of regulated substances. Its behavior in soil, including degradation, adsorption, and volatilization, has been studied.
NewsLab news
A master's student won the Secretary General Award at the Environmental Information Science Poster Session
A master's student won the Academic Committee Chair Award at the Environmental Information Science Poster Session
ResearchResearch themes
Based on environmental chemistry and environmental engineering, the lab studies technologies for efficiently evaluating and reducing the environmental risks caused by chemical substances. Its research projects have dealt with the remediation of soil contamination, the behavior of chemicals in soil, and criteria for deciding on responses based on health risk.
*Illustrative imageRemediation by heating of contamination that has penetrated cohesive soil
This theme addresses the problem of volatile organochlorine compounds, used in dry cleaning and degreasing, penetrating deep into cohesive soil, which is difficult to remediate. The lab investigates how the penetration changes over time and how heating promotes the release of the contaminants, and also examines how to determine when remediation can be ended so that the contamination neither spreads nor rebounds.
*Illustrative imageHealth risk at contaminated soil sites and criteria for response
Focusing on sites where surface soil is contaminated with lead, this theme examines criteria for distinguishing the response to low-concentration contamination from the response to high-concentration contamination that requires prompt excavation and removal. The lab builds case studies of health risk assessment covering diverse exposure routes, including inhalation exposure, and checks toxicity information, in order to find criteria that allow decisions to be made by comparing the magnitude of risk.
*Illustrative imageBehavior of chloroethylene in soil
For chloroethylene, a newly regulated substance, the lab investigated its behavior in soil, including the substances produced by its degradation, its adsorption to and desorption from soil, and its volatilization and diffusion. Combining laboratory experiments, simulation calculations, and field surveys, this was a joint study with the National Institute of Advanced Industrial Science and Technology (AIST) and Tokyo University of Agriculture and Technology, aimed at obtaining information useful for soil surveys and remediation measures.
MembersFaculty
- ProfessorTakeshi Kobayashi
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: “USAID Dioxin Contamination Project Progress Soil Sampling ( )” USAID Vietnam / Public domain (cropped)
- Remediation by heating of contamination that has penetrated cohesive soil: “Bern Gaswerkareal Sanierung” Hadi / CC0 (cropped)
- Health risk at contaminated soil sites and criteria for response: “Soilcontam” Dumelow / CC BY-SA 4.0 (cropped)
- Behavior of chloroethylene in soil: “Bruin-lagoon-drilling” 作者不詳 / Public domain (cropped)
- Related lab (Global-Local Management Lab): “Container cranes at the Port of Oakland” Cullen328 / CC BY-SA 4.0 (cropped)
- Related lab (Urban Disaster Prevention Planning Lab): “Road damage in Naypyidaw, 2025 Earthquake” User:Minntheking / CC BY-SA 4.0 (cropped)
- Related lab (Risk Psychology Lab): “Flood warning sign along Cappagh Road - geograph.org.uk - 6422062” Kenneth Allen / CC BY-SA 2.0 (cropped)
- Related lab (Soil Biology Lab): “Springtail (Collembola Symphypleona) on soil” Lewis Fausak / CC BY-SA 4.0 (cropped)
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