ハイドロタルサイト化合物を配合したコンクリートブロックによる都市河川からのリン除去

DOI Web Site Web Site 被引用文献3件 参考文献27件

書誌事項

タイトル別名
  • Phosphorous Removal from Urban River Using Concrete Blocks Mixed with Hydrotalcite Compounds
  • ハイドロタルサイト カゴウブツ オ 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

この論文をさがす

抄録

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.

収録刊行物

  • 水環境学会誌

    水環境学会誌 27 (2), 109-115, 2004

    公益社団法人 日本水環境学会

被引用文献 (3)*注記

もっと見る

参考文献 (27)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ