酸性抗廃水（幌別）処理における繰り返し殿物処理法によるスラッジの生成

DOI Web Site 被引用文献9件 参考文献84件

書誌事項

タイトル別名
  • Sludge Generation in the Treatment of Acid Mine Drainage (AMD) by High-Density Sludge (HDS) Recycling Method-Optimum Neutralization Process of Horobetsu AMD (First Paper)
  • Optimum Neutralization Process of Horobetsu AMD (First Paper)

この論文をさがす

抄録

Calcium hydroxide (Ca(OH)2), a combination of calcium carbonate (CaCO3) and Ca(OH)2 (two step) and magnesium oxide (MgO) were used as a neutralizer in the treatment of synthetic Horobetsu Acid Mine Drainage (AMD) by High-Density Sludge (HDS) recycling method to obtain the appropriate guidelines of optimum AMD treatment. The result during the initial neutralization demonstrated that at pH 7, arsenic, either As(III) or As(V) in solution, could be removed by adsorption to the sludge with a concentration in the supernatant solution below the Japanese regulated environmental effluent standard. The sludge generated in HDS recycling method with Ca(OH)2 neutralization was composed of Fe(III) hydroxide combined with a high amount of gypsum (CaSO4·2H2O), the same as in the two step neutralization in which undissolved CaCO3 was included. The sludge generated in HDS recycling with MgO neutralization was composed of basic ferric sulphate combined with a low content of undissolved MgO. The sludge-settling rate generally decreased as the recycling process proceeded. The settling rate of the sludge from MgO neutralization was faster than that of the sludge from the Ca(OH)2 and two step neutralization. The Fe density of the sludge by MgO neutralization was highest compared to the other neutralization.

収録刊行物

  • 資源と素材

    資源と素材 122 (8), 406-414, 2006

    一般社団法人 資源・素材学会

被引用文献 (9)*注記

もっと見る

参考文献 (84)*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