Perchlorate Ion in Aerosols Collected at Cape Hedo, Okinawa, Japan

DOI Web Site
  • HANDA Daishi
    Graduate School of Engineering and Science, University of the Ryukyus
  • OKADA Kouichirou
    Graduate School of Engineering and Science, University of the Ryukyus Okinawa Environmental Research & Technology Center
  • NAKAJIMA Hitomi
    Graduate School of Engineering and Science, University of the Ryukyus
  • ARAKAKI Takemitsu
    Department of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus

Bibliographic Information

Other Title
  • 沖縄辺戸岬で採取した大気エアロゾル中の過塩素酸イオン
  • オキナワ ヘドミサキ デ サイシュ シタ タイキ エアロゾル チュウ ノ カエンソサン イオン

Search this article

Abstract

Perchlorate ion (ClO4-) has been recognized as a new environmental pollutant. The concern about ClO4- stems from the fact that it displaces iodide in the thyroid gland. Iodine-containing thyroid hormones are essential for proper neural development from the fetal stage through the first years of life. In this study, we determined the concentrations of ClO4- in aerosols collected at Cape Hedo Atmosphere Aerosol Monitoring Station of National Institute of Environmental Studies (NIES-CHAAMS) Okinawa Island, Japan. Aerosols were collected on quartz filters by using a high-volume air sampler. The ClO4- concentrations were determined by ion chromatography (ICS-2000, DIONEX). About 60% of the weekly-collected aerosols contained detectable level of ClO4-, and the highest ClO4- concentration for the samples collected at NIES-CHAAMS was 1.8ng m-3. Back trajectory analysis showed that ClO4- concentrations were higher when air mass came from Asian continent, suggesting that ClO4- found at NIES-CHAAMS was probably due to long-range transport from Asian continent.<br>

Journal

  • Earozoru Kenkyu

    Earozoru Kenkyu 25 (3), 269-273, 2010

    Japan Association of Aerosol Science and Technology

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top