Ferrite Formation Using Precipitates Neutralized by Magnesium Oxide in the Treatment of Acid Mine Drainage
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- YOSHIDA Tetsuya
- Division of Environment and Resources Engineering, Graduate School of Engineering, Hokkaido University
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- IGARASHI Toshifumi
- Division of Environment and Resources Engineering, Graduate School of Engineering, Hokkaido University
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- ASAKURA Kuniomi
- Division of Environment and Resources Engineering, Graduate School of Engineering, Hokkaido University
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- MIYAMAE Hiroko
- Ataka Construction & Engineering Co., Ltd.
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- IYATOMI Nobuyoshi
- Nittetsu Mining Co., Ltd.
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- HASHIMOTO Koichi
- Japan Oil, Gas and Metals National Corporation
Bibliographic Information
- Other Title
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- 酸化マグネシウムによる坑廃水中和処理殿物のフェライト化に関する研究
- サンカ マグネシウム ニ ヨル コウ ハイスイ チュウワ ショリデンブツ ノ フェライトカ ニ カンスル ケンキュウ
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Abstract
To reduce the volume of precipitates generated by the neutralization of acid mine drainage (AMD) containing high concentrations of Fe and As, ferritization of the precipitates was attempted by a two-step neutralization process in which magnesium oxide (MgO) was used as the first neutralizer and sodium hydroxide (NaOH) as the second. Batch neutralization experiments with MgO and continuous flow experiments by the two-step neutralization were conducted in laboratories and an AMD treatment plant. The results showed that the precipitates by the neutralization were magnetized in the continuous flow experiments, although there was Al and Si that prevented the generation of ferrite in the AMD. This indicates that ferrite was formed from the precipitates after removing most of the soluble Al and Si by the first neutralization. In addition, aging of the precipitates under reducing conditions and returning the aged precipitates to a ferrite tank were required to form ferrite. The molar ratio of As to Fe in the precipitates reached a constant value at pH>3.5. This suggests the coprecipitation of As and Fe.
Journal
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- Shigen-to-Sozai
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Shigen-to-Sozai 120 (10/11), 577-583, 2004
The Mining and Materials Processing Institute of Japan
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Details 詳細情報について
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- CRID
- 1390001206049504000
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- NII Article ID
- 10014033663
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- NII Book ID
- AN10062646
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- COI
- 1:CAS:528:DC%2BD2cXhtVCnt73M
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- ISSN
- 18806244
- 09161740
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- NDL BIB ID
- 7164075
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed