Dissolution Behavior of Nutrients, Metal Elements and Fluorines from Steelmaking Slag to the Sea Water

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  • 製鋼スラグ添加による栄養塩,金属元素およびフッ素の海水中への溶出挙動
  • セイコウ スラグ テンカ ニ ヨル エイヨウエン キンゾク ゲンソ オヨビ フッソ ノ カイスイチュウ エ ノ ヨウシュツ キョドウ

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Abstract

For the purpose of reducing CO2 contents in the atmosphere, one of the solution is said to grow the biomass of phytoplankton by it's photosynthesis, that is enhances it's biological pump. When steelmaking slag is applied to the sea, the nutrient like phosphate and silicate, and ferrous ion as a micro nutrient, which is indispensable for the growth of phytoplankton, especially diatoms, is considered to be supplied sufficiently.<BR>This time, large tank test adding steelmaking slag was carried out, and increase behavior of phytoplankton was investigated. And at the same time, the behavior of various kinds of chemical elements which dissolves from steelmaking slag to the sea water examined in detail.<BR>The results show that contamination problems from the steelmaking slag which was applied to this experiment cannot be recognized. Behavior of dissolved element is compared to some experimental systems, for example, large tank test and beaker test etc., using analytical model. Furthermore, three dimensional simulation of dissolved nutrients from steelmaking slag was also investigated.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 89 (4), 393-400, 2003

    The Iron and Steel Institute of Japan

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