Laboratory of Organic Geochemistry
Through trace analyses of organic compounds in environmental samples,
we tackle various environmental problems. We hope that the products
of our studies directly or indirectly contribute the solutions
of the problems
1. Molecular marker approach
2. Understanding of transport processes of organic pollutants
3. Revealing the distributions, sources, behaviors and fates of
1. Intensive field observations
2. Sensitive instrumental analysis (Samurai mass-spec)
Research topics in 2008
1. Development, evaluation
and field application of Molecular Markers
- Distinguishment of source of PAHs derived from fossil-fuel combustion and
biomass burning by using molecular markers and compound-specific-measurement
- Establishment of molecular markers to distinguish domestic waste and livestock
wastes in tropical Asian waters.
of analytical methods of new environmental contaminants and their
- Development of analytical method for tetracycline antibiotics in sewage
effluents, livestock wastes, and river water.
- Development of analytical method for phenolic pharmaceuticals in sediments.
the distribution and behavior of organic contaminants in aquatic
- Distribution of pharmaceuticals in tropical Asian waters.
- Distribution of perfluorinated surfactants (PFSs) in Asian freshwater fishes.
of sources of organic micro-pollutants
- Source-identification of polycyclic aromatic hydrocarbons (PAHs) in atmospheric
and aquatic environments in India.
5. Study on
transport processes of organic pollutants
- Transport mechanism of antibiotics in coastal waters.
- Behavior of pharmaceutical chemicals derived from combined sewer overflow
(CSO) in coastal waters.
- Behavior of livestock-derived antibiotics in tropical Asian waters.
- Distribution and behaviors of pharmaceuticals, antibiotics, and perfluorinated
surfactants in groundwater
6. Uptake and
accumulation of organic micro-pollutants to organisms.
- Biomagnification of polybrominated diphenyl ether (PBDE) in food-web in
- Bioaccumulation of polybrominated diphenyl ether (PBDE) in freshwater fishes.
- Transfer of plastic-derived organic micro-pollutants to marine biota.
- Understanding the uptake pathway of organic micropollutants to seabirds
by non-invasive approach using preen gland oil.
- Understanding feeding behavior of seabird by non-invasive analysis of carbon
and nitrogen stable isotope.
of monitoring methods for organic micro-pollutants.