著者

山本 光夫 福嶋 正巳 劉 丹

出版者

一般社団法人 日本鉄鋼協会

雑誌

鉄と鋼 (ISSN:00211575)

巻号頁・発行日

vol.97, no.3, pp.159-164, 2011-03-01 (Released:2011-03-01)

参考文献数

16

被引用文献数

16 17

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Barren grounds in coastal area are serious problems in Japan and throughout the world. Although several factors have been proposed to account for barren grounds, we have especially focused on lack of dissolved iron for restoring seaweed beds. It has been developed a method that the mixture of steelmaking slag and humus materials, such as composts, were supplied in seawater. A concentration of dissolved iron can be increased by using the method, since complexes, iron-humates, are produced from iron in steelmaking slag and humic substances in compost. In this study, we evaluated the effect of humic substances in this method for increasing dissolved iron concentration. A laboratorial iron elution test by using actual seawaters was attempted. Three kinds of samples for iron elution, only steelmaking slag, only humus materials, and a mixture of steelmaking slag and humus materials, were prepared. The change of iron concentration in each small tank had been monitored. We found that iron elution rate in the case of the mixture of steelmaking slag and compost was faster than that in the case of only steelmaking slag. Furthermore, it was expected that the characteristic of the structure of humic substances were related to increase iron elution from steelmaking slag. The mixture of steelmaking slag and humus materials was more effective not only for increasing iron concentration in seawater and but also for extending the life time of Fe elution.

著者

福嶋 正巳 倉光 英樹 長尾 誠也

出版者

北海道大学

雑誌

基盤研究(B)

巻号頁・発行日

2009

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鉄ポルフィリン触媒による臭素系難燃剤テトラブロモビスフェノールA(TBBPA)の酸化分解に及ぼす腐植酸の影響について検討を行った。これまで研究を行ってきた塩素化フェノール類とは異なり、TBBPAは鉄ポルフィリン触媒による脱ハロゲン化が起こりにくく、主としてオリゴマーが生成する酸化重合が優先的に起こることがわかった。したがって、腐植酸を共存させたときには、TBBPAやBPsの酸化生成物と腐植酸とのカップリング化合物が生成し、その転化率は50-60%程度であった。また、藻類(P.subcapitata)成長阻害試験によりTBBPAのみを酸化した場合と腐植酸を共存させた場合に関する毒性評価を行ったが、腐植酸の共存によりTBBPAの毒性が低減することを明らかにした。