Study of Long-range Trans-boundary Air Pollution of PM2.5 by Soft rime ice collected in Shikoku Island, Japan

2017 Fiscal Year Final Research Report

• Project/Area Number: 26340084
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental risk control and evaluation
• Research Institution: The University of Tokushima
• Principal Investigator: IMAI Shoji 徳島大学, 大学院社会産業理工学研究部(理工学域), 教授 (50232591)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 越境汚染 / 石炭燃焼排出物 / 有機イオウ化合物 / 樹氷 / 重金属 / 石炭飛灰 / 環境分析 / 雪

Outline of Final Research Achievements

Coal combustion exhausts transported from northeast Asia region were found in rime ice and snow collected on the summit of mountain (1400 m alt.) in Shikoku Island. The coal combustion with no exhaust purification specifically emits 1) aerosol particulates including cadmium and lead, 2) gaseous pollutants such as SO2 converting to sulfate, 3) products of incomplete combustion, and 4) inorganic small spherical particles (ISPs) from power plants. It was found in the rime and snow that organic sulfur species indicates to
a proof of the coal exhaust.　A methodology for determination of generating area in northeast Asia was proposed by the chemical composition of the ISPs, heavy metals and sulfate ion concentration based on meteorological information. It can be concluded that the generating areas of air pollution were the region of Huabei of China and the south area of northeast China.

Free Research Field

環境分析化学