| Project/Area Number |
15K21372
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
Green/Environmental chemistry
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| Research Institution | International Christian University |
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Principal Investigator |
Minejima Chika 国際基督教大学, 教養学部, 准教授 (20550198)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | 硝化 / 大気 / HONO / 活性汚泥 / 水田 / 亜硝酸 / ナイトレイト / 窒素酸化物 / 脱窒 / ダイナミックチャンバー / フィルターパック / OH / 土壌 / 発生 |
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| Outline of Final Research Achievements |
Gaseous nitrous acid, HONO, changes chemically into hydroxyl radical, OH, which is a cleanser of the atmosphere. Despite its importance, its source is not fully understood. I focused on soil, especially rice paddy soils and activated sludge widely used at waste treatment plants as new HONO sources. Fertilizer is applied and water level is managed in the rice paddy, thus nitrification/denitrification processes are unique. Activated sludge is aggregate of nitrifying/denitrifying bacteria. As a result, the amount of HONO emitted by rice paddy soil has non-negligible influence on the atmosphere’s cleansing ability.
Significant amount of HONO emission was confirmed from activated sludge and the main emission process was found out to be biological.
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