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タイトルヨミ
ハイドロタルサイト カゴウブツ ヲ ハイゴウ シタ コンクリート ブロック ニヨル トシ カセン カラ ノ リン ジョキョ
タイトル別表記
Phosphorous Removal from Urban River Using Concrete Blocks Mixed with Hydrotalcite Compounds
著者
野中 資博
山本 広基 島根大学生物資源科学部
相崎 守弘
福田 康伴 株式会社イズコン
内容記述(抄録等)
Concrete blocks with phosphorous adsorption ability have been developed to remove non-point source phosphorous from rivers and canals. The concrete blocks were prepared by mixing cement with a hydrotalcite compound (HT) that has high selectivity and large phosphorous adsorption capacity. The concrete blocks (test pieces) with various the filling ratios of 85, 90 and 95% were prepared using fresh concrete, and the result of the slump test was 0 cm. Also, the compressive strength and phosphorous removal capacity were investigated fundamentally. The results showed that the compressive strength of all the test pieces was above 18N·mm-2 and they were sufficiently strong for use as laying blocks. For a test piece with a low filling ratio, phosphorous was removed by Ca2+ and for a test piece with a high filling ratio, phosphorous was not removed by ion exchange. However, these results suggest that high strength and high phosphorous adsorption ability are compatible with each other, which can be controlled by regulating the mix proportion. Furthermore, field tests were conducted using large concrete blocks containing HT (HT specimens). The results showed that phosphorous was adsorbed at the uppermost layer of the HT specimens. In the tests, the break-through of phosphorous adsorption occurred three months later and the average removal rate for such break-through was 3.69mg P·m-2·d-1.
主題
phosphorous removal
non-point source
concrete material
phosphorous resource
hydrotalcite compounds
掲載誌名
水環境学会誌
27
2
開始ページ
109
終了ページ
115
ISSN
1881-3690
ISSN(Online)
0916-8958
発行日
2004-02-10
DOI
出版者
日本水環境学会
出版者ヨミ
ニホン スイカンキョウ ガッカイ
出版者別表記
Japan Society on Water Environment
資料タイプ
学術雑誌論文
ファイル形式
PDF
著者版/出版社版
出版社版
部局
生物資源科学部
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