このエントリーをはてなブックマークに追加
ID 28859
本文ファイル
著者
Yoshioka, Ichiro
Tanaka, Hitoshi
キーワード
Enclosed water body
Hydrogen sulfide
Coal ash
Marine sediment
Thermal power station
Phosphate
NDC
化学
抄録(英)
It is very important to reduce phosphorus flux from sediment as well as cutting down terrigenous loads in order to control eutrophication in semi-enclosed coastal seas. Hydrogen sulfide is also a noxious substance which is highly toxic and fatal to benthic organisms. The purpose of this study is to evaluate remediation efficiency of organically enriched sediments using granulated coal ash (GCA) in terms of reducing benthic phosphorus flux and hydrogen sulfide. A flow-through experimental system was used to simulate the semi-enclosed water bodies. The application of GCA decreased the concentration of PO43- in the pore water effectively, and reduced phosphate releasing flux from the sediment into overlying water by 37-44% compared to the control. The hydrogen sulfide in the pore water was also decreased by 77-100%. due to adsorption onto the GCA and deactivation of sulfate-reducing bacteria due to increasing pH. Thus, GCA is a promising recycled material for reducing phosphate releasing flux from organically enriched sediment to alleviate eutrophication as well as reduce the concentration of hydrogen sulfide in pore water.
掲載誌名
Journal of Hazardous Materials
172巻
1号
開始ページ
92
終了ページ
98
出版年月日
2009-12-15
出版者
Elsevier Science BV
ISSN
0304-3894
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2009 Elsevier B. V.
関連情報URL
部局名
理学研究科