Mechanism and control of scorodite formation for arsenic stabilization

臭葱石形成稳定砷的机理及控制

• 批准号: 20560694
• 负责人: HIDEYUKI Itou
• 金额: $ 2.91万
• 依托单位: Kyushu Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560694/
• 关键词: ヒ素; スコロダイト; 固定化; 非晶質; 結晶化

Copper is one of important base metals. On the other hand, the concentrations of impurities in ores are increasing due to the decrease in the natural resources. In particular, arsenic becomes the problem. The technology to immobilize the arsenic after separation is required to store the arsenic safely and economically. The purpose of this study was to elucidate the formation mechanism of the scorodite which was an stable arsenic compound. It was made clear that, depending on conditions, amorphous ferric arsenate was once formed on a seed crystal in water solutions but crystallized with progress of the retention time. It was also found that crystallization of the amorphous into scorodite occurs even in gas atmospheres.

铜是重要的贱金属之一。另一方面，由于自然资源的减少，矿石中的杂质浓度正在增加。尤其是砷成为了问题。为了安全、经济地储存砷，需要对分离后的砷进行再结晶处理。本研究的目的是阐明臭葱石的形成机制，臭葱石是一种稳定的砷化合物。很清楚，根据条件，在水溶液中，在晶种上一度形成无定形砷酸铁，但随着保留时间的进展而结晶。还发现即使在气体气氛中也会发生无定形结晶为臭葱石。

项目成果

Crystallization of the Amorphous Ferric Arsenate in the Saturated Steam Atmosphere

非晶态砷酸铁在饱和蒸汽气氛中的结晶

• 发表时间: 2011
• 期刊: High Temperature Materials and Processes Vol.30, Nos.4
• 作者: Hideyuki Itou;Tomio Takasu;Yasunori Ueno
• 通讯作者: Yasunori Ueno

非晶質ヒ酸鉄の結晶化

非晶态砷酸铁的结晶

• 发表时间: 2010
• 作者: 柴原正文;本田幸司;栗田幸之助
• 通讯作者: 栗田幸之助