| Project/Area Number |
20K23359
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Multi-year Fund |
|---|
| Review Section |
1101:Environmental analyses and evaluation, environmental conservation measure and related fields
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
Divya Vani 北海道大学, 保健科学研究院, 助教 (40875952)
|
|---|
| Project Period (FY) |
2020-09-11 – 2022-03-31
|
| Project Status |
Completed (Fiscal Year 2021)
|
| Budget Amount *help |
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
|---|
| Keywords | PAH / LCMS / Atmospheric aerosols / Organic aerosols / Seasonal change / Oxy-PAH / Nitro-PAH / Hokkaido |
|---|
| Outline of Research at the Start |
PM2.5 aerosol samples will be collected over the five different sites in Hokkaido region and measure the PAHs and its derived compounds including identification of unknowns. Next, their seasonal profiles will be obtained to find their plausible sources over each season and finally, I will propose the plausible pathways of their transformations in the atmosphere using various correlation studies. For this purpose, advanced LC-MS analysis will be employed using LTQ-Orbitap-MS which gives the information at MSn levels even to characterize the unknown PAH toxicants and their concentrations.
|
| Outline of Final Research Achievements |
PAHs are a group of organic compounds of multiple aromatic rings. PAHs and related compounds have toxic, mutagenic, and carcinogenic properties. Hence, it is important to understand the abundance, speciation, distribution, and potential sources, so that the diverse effects of PAHs can be examined and can be controlled. Currently, LC/MS methods have been established with 0.01 ng LOQ and 0.001 ng LOD. Aerosol samples have been collected on the rooftop of health science, Hokkaido University from 2021 and 2022. Benzo perylene is the most abundant species followed by 6-nitro benzo pyrene and Benzo anthracene As the cold season approaches the concentration of PAH and related compounds also increases from October to April. Benzo perylene concentration ranged from 3.5 pg/m3 to 19.4 pg/m3 from October to January.6-nitro benzo pyrene ranges from 2.9 pg/m3 to 7.1 pg/m3 from October until March and 6-nitro benzopyrene is considered a secondary aerosol formed in the atmosphere.
|
| Academic Significance and Societal Importance of the Research Achievements |
Seasonal variation of PAHs and related compounds have been examined in the Sapporo aerosols. These results will help to understand the air quality of the Sapporo, Sapporo is the cold area of Japan where heating activity is more in autumn-winter and spring.
|
