Silicate Covering Layer on Pyrite Surface in the Presence of Silicon–Catechol Complex for Acid Mine Drainage Prevention
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- Yuniati Mutia Dewi
- Department of Earth Resources Engineering, Kyushu University Research Center for Geotechnology, Indonesian Institute of Sciences
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- Hirajima Tsuyoshi
- Department of Earth Resources Engineering, Kyushu University Research and Education Center of Carbon Resources, Kyushu University
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- Miki Hajime
- Department of Earth Resources Engineering, Kyushu University
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- Sasaki Keiko
- Department of Earth Resources Engineering, Kyushu University
書誌事項
- タイトル別名
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- Silicate Covering Layer on Pyrite Surface in the Presence of Silicon–Catechol Complex for Acid Mine Drainage Prevention
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In this paper, prevention of pyrite oxidation by carrier microencapsulation (CME) was investigated. A possible layer structure was suggested following analysis with electrochemical and surface analysis techniques. Electrochemical study of treated pyrite samples showed that treatment with silicon–catechol (Si-Cat) for 6 h at an initial pH of 9.5 gave the best barrier properties and suppression of the samples. Scanning electron microscopy with energy-dispersive X-ray, and Fourier transform infrared (FTIR) analyses confirmed the presence of a silicate layer on the surface of treated pyrite. X-ray photoelectron spectroscopy indicated that the coating layers on the treated pyrite samples consisted of a network of Fe-O-Si and Si-O-Si units bonded to the surface of pyrite. The Si-O-C asymmetric stretching mode was also observed in FTIR spectra. Detailed spectroscopic analyses confirmed the formation of a silicate polymer on a silica–quinone layer, which resulted in the effective suppression effect shown by Si-Cat-treated pyrite at increasing pH.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 56 (10), 1733-1741, 2015
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390001204253349376
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- NII論文ID
- 130005099167
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 026767423
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可