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- 齋藤 千愛
- 東北大学大学院工学研究科 応用化学専攻
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- 岡田 治樹
- 東北大学工学部分子化学工学科
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- Titus Monica Joy
- Environment Conservation Research Institute, Tohoku University
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- 吉岡 敏明
- 東北大学大学院環境科学研究科
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- 溝口 忠昭
- 東北大学環境保全センター
書誌事項
- タイトル別名
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- Leaching of Heavy Metals from Fly Ash Generated from Gasification and Melting Furnace for Municipal Solid Wastes by Organic Acids
- ユウキサン オ モチイタ トシ ゴミ ガスカ ヨウユウ ヒカイ カラノ ジュウキンゾク シンシュツ
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The leaching behavior of zinc, lead, and copper from fly ash generated in gasification and melting furnaces for municipal solid wastes (MSW) was studied by a constant pH leaching method with organic acids. The leaching degrees of the above-mentioned heavy metals were as low as 10%, or lower at pH 2 for the residue, obtained by leaching fly ash with water. The leaching degree of heavy metals increased remarkably with the addition of organic acids. The leaching degrees of zinc, lead, and copper were 64, 64 and 91%, respectively, under conditions where the concentration of citrate was as low as 0.001 M, and pH was 4. The citrate's effectireness in the leaching of heavy metals may be due to the catalytic acceleration action of dissolution, but not the stabilization effect for heavy metals in solution. The degree of leaching for zinc, lead, copper, and silicate decreased with the elevation of the reaction temperature from 25°C to 50°C. A constant pH leaching method with citrate has features such that high leaching degrees for heavy metals are obtained, and silicate gel, which is difficult to be filtered, is not generated.
収録刊行物
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- 廃棄物学会論文誌
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廃棄物学会論文誌 18 (3), 157-166, 2007
一般社団法人 廃棄物資源循環学会
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詳細情報 詳細情報について
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- CRID
- 1390282680273847040
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- NII論文ID
- 10018760763
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- NII書誌ID
- AN10414685
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- COI
- 1:CAS:528:DC%2BD2sXnvVGgtb8%3D
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- ISSN
- 1883163X
- 18831648
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- NDL書誌ID
- 8766195
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- データソース種別
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- JaLC
- NDL
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