Laboratory Study for the Phytoremediation of Eutrophic Coastal Sediment Using Benthic Microalgae and Light Emitting Diode (LED)

• Kwon Hyeong Kyu

  Department of Oceanography, Pukyong National University

• Oh Seok Jin

  Department of Oceanography, Pukyong National University

• Yang Han–Soeb

  Department of Oceanography, Pukyong National University

• Kim Dong–Myung

  Department of Ecological Engineering, Pukyong National University

• 姜 益俊

  九州大学大学院農学研究院オープンプロブレムスタディープログラム

• 大嶋 雄治

  九州大学大学院農学研究院生物機能科学部門海洋生命化学講座

抄録

We investigated the effects of three wavelengths of light (blue; 450nm, yellow; 590nm and red; 650nm) using light emitting diodes (LEDs) on the growth of benthic microalgae (BMA) Achnanthes sp., Amphora sp., Navicula sp., Nitzschia sp. and the harmful algae Alexandrium tamarense. In addition, we confirmed phytoremediation possibilities of eutrophic coastal sediments obtain from Masan Bay in 60L water tank with LEDs. The growth rates of four BMA species could grow under all irradiance conditions of three wavelengths. However, the growth rate of A. tamarense was stimulated under blue LED and suppressed under yellow and red LED to less than 70μmol/m^2/s. In water tank experiments with no light, environmental factors, such as cell density of Nitzschia sp., chlorophyll a (Chl. a), chemical oxygen demand (COD), acid volatile sulfide (AVS), dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP), were no significant increases or decreases. However, in water tank experiments with LED, cell density of Nitzschia sp. and chl. a increased, whereas DIN, DIP, and AVS levels decreased. The removal efficiencies for DIN, DIP, and AVS were high in the order of blue LED, fluorescent lamp, red LED, and yellow LED. Thus, in order to remediate eutrophic sediments, red LED may be the most appropriate during the spring and summer when appearances of harmful algae in the genus Alexandrium are present and blue LED may be the most appropriate during other seasons.

収録刊行物

• Journal of the Faculty of Agriculture, Kyushu University

  Journal of the Faculty of Agriculture, Kyushu University 58 (2), 417-425, 2013-09

  九州大学大学院農学研究院

キーワード

• benthic microalgae
• eutrophic sediment
• light emitting diode
• phytoremediation
• wavelength

詳細情報

• CRID: 1390290699660587264
• NII論文ID: 120005326669
• NII書誌ID: AA00247166
• DOI: 10.5109/27374
• HANDLE: 2324/27374
• ISSN: 00236152
• 本文言語コード: en
• データソース種別:
  • JaLC
  • IRDB
  • Crossref
  • CiNii Articles