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High-Pressure Oxidative Leaching and Iodide Leaching Followed by Selective Precipitation for Recovery of Base and Precious Metals from Waste Printed Circuit Boards Ash
http://hdl.handle.net/10295/00006234
http://hdl.handle.net/10295/0000623427e67842-c383-4433-9257-7b4a90ede37e
| 名前 / ファイル | ライセンス | アクション |
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kokuA_2022_9.pdf (3.8 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||
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| 公開日 | 2023-02-23 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | High-Pressure Oxidative Leaching and Iodide Leaching Followed by Selective Precipitation for Recovery of Base and Precious Metals from Waste Printed Circuit Boards Ash | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | waste printed circuit board | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | gold | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | iodide | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | iodine | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | ascorbic acid | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | leaching | |||||||||||||
| 主題 | ||||||||||||||
| 主題Scheme | Other | |||||||||||||
| 主題 | precipitation | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | journal article | |||||||||||||
| アクセス権 | ||||||||||||||
| アクセス権 | open access | |||||||||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||||||||
| 作成者 |
Batnasan, Altansukh
× Batnasan, Altansukh
× Haga, Kazutoshi
× Huang, Hsin-Hsiung
× Shibayama, Atsushi
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| 内容記述 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | This paper deals with the recovery of gold from waste printed circuit boards (WPCBs) ash by high-pressure oxidative leaching (HPOL) pre-treatment and iodide leaching followed by reduction precipitation. Base metals present in WPCB ash were removed via HPOL using a diluted sulfuric acid solution at elevated temperatures. Effects of potassium iodide concentration, hydrogen peroxide concentration, sulfuric acid concentration, leaching temperature, and leaching time on gold extraction from pure gold chips with KI-H2O2-H2SO4 were investigated. The applicability of the optimized iodide leaching process for the extraction of gold from the leach residue obtained after HPOL were examined at different pulp densities ranging from 50 g/t to 200 g/t. Results show that the removal efficiency was 99% for Cu, 95.7% for Zn, 91% for Ni, 87.3% for Al, 82% for Co, and 70% for Fe under defined conditions. Under the optimal conditions, the percentage of gold extraction from the gold chips and the residue of WPCBs was 99% and 95%, respectively. About 99% of the gold was selectively precipitated from the pregnant leach solution by sequential precipitation with sodium hydroxide and L-ascorbic acid. Finally, more than 93% of gold recovery was achieved from WPCB ash by overall combined processes. | |||||||||||||
| 言語 | en | |||||||||||||
| 出版タイプ | ||||||||||||||
| 出版タイプ | VoR | |||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||||
| 書誌情報 |
en : METALS 巻 9, 号 3, 発行日 2019 |
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| 収録物識別子 | ||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||
| 収録物識別子 | 2075-4701 | |||||||||||||
| 出版者 | ||||||||||||||
| 出版者 | MDPI | |||||||||||||
| 言語 | en | |||||||||||||
| 関連情報 | ||||||||||||||
| 関連タイプ | isIdenticalTo | |||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | https://doi.org/10.3390/met9030363 | |||||||||||||
| 権利情報 | ||||||||||||||
| 権利情報 | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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