International investigation of transboundary air pollution in East Asia

2014 Fiscal Year Final Research Report

• Project/Area Number: 24404007
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: Nagasaki University
• Principal Investigator: NAGAE Masaki 長崎大学, 水産・環境科学総合研究科(環境), 教授 (00315227)
• Co-Investigator(Kenkyū-buntansha): TAKAO Yuji 長崎大学, 水産・環境科学総合研究科(環境), 教授 (20206709) ; KUBO Takashi 長崎大学, 産学官連携戦略本部, 助教 (40397089) ; OKADA Jiro 長崎大学, 水産・環境科学総合研究科(環境), 教授 (10284481) ; KAWAMOTO Kazuaki 長崎大学, 水産・環境科学総合研究科(環境), 教授 (10353450) ; NISHIYAMA Masaya 長崎大学, 水産・環境科学総合研究科(環境), 教授 (50263801) ; TAKATSUJI Toshihiro 長崎大学, 水産・環境科学総合研究科(環境), 教授 (70163219)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 越境大気汚染 / 生物毒性 / 東アジア / PAHs / 微量分析

Outline of Final Research Achievements

In this study, air samples were collected, and seasonal changes in the concentration of poly-aromatic hydrocarbons (PAHs) were monitored. In addition, changes in the toxicity of chemicals contained in these samples were investigated using several biological tests. Back trajectory analysis revealed that air mass was crossing over to Nagasaki from Northern part of China mainly in winter, but it was not seen during summer season. From toxicity test, toxic levels of airborne chemicals collected at Nagasaki seemed to be high during winter period. Microanalysis revealed PAHs concentrations were also high in winter. There was high seasonal correlation between the toxicity and PAHs concentration. From these results, it was suggested that PAHs was one of the major toxicant contained in transboundary air. In addition, high sensitive microanalysis (HPLC/Q-TOF) detected a few candidates for the new toxicant.

Free Research Field

環境科学