著者

濱井 昂弥 堀内 健吾 古川 創

出版者

一般社団法人 環境資源工学会

雑誌

環境資源工学 (ISSN:13486012)

巻号頁・発行日

vol.69, no.2, pp.71-79, 2022 (Released:2023-02-01)

参考文献数

20

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In Japan, many studies have been conducted to reduce the cost of mine drainage treatment at abandoned mines. The treatment method called “passive treatment” that utilizes natural purification and is expected to be applied to mine drainage treatment.Following the completion of the guidelines on the introduction of passive treatment, we conducted a simple screening focused on water quality, quantity and utilizable blank space to review the applicability of passive treatment to abandoned mines in Japan.Our findings indicate that passive treatment has the potential to be applied to many of abandoned mines in Japan, although there are still some issues to be solved.

著者

髙谷 雄太郎 淵田 茂司 濱井 昂弥 堀内 健吾 正木 悠聖 所 千晴

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.138, no.2, pp.19-27, 2022-02-28 (Released:2022-02-26)

参考文献数

42

被引用文献数

3

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In decades, various studies on passive treatment methods of acid mine drainage (AMD) have been actively conducted in order to reduce the cost of AMD treatment. Open limestone channel is one of the most common methods and has already been implemented mainly in overseas. On the other hand, it is difficult to secure large channels in Japan due to its topography, we need to consider the use of alkaline materials with higher acid neutralization potential which enables successful treatment with narrower space. In this study, therefore, PAdeCS, a cement-derived environmental remediation agent, was used to remove the harmful metal elements by neutralization treatment. Then, we developed a simulation model assuming a combined system of open limestone channel and alkaline material (PAdeCS) channel and predicted the behavior of harmful metal elements within the combined channel. The simulation results showed that PAdeCS has extremely high acid neutralization potential, that high temperature is advantageous for neutralization treatment of harmful metal elements, and that the channel design needs to be changed depending on the initial drainage composition. Finally, a new flowchart for selecting the appropriate passive treatment method was proposed, which consists of three steps of the preferential removal of Fe, neutralization by limestone, and additional treatments.

著者

濱井 昂弥 小寺 拓也 小林 幹男 増田 信行 酒田 剛

出版者

一般社団法人 資源・素材学会

雑誌

Journal of MMIJ (ISSN:18816118)

巻号頁・発行日

vol.132, no.11, pp.175-181, 2016-11-01 (Released:2016-11-25)

参考文献数

17

被引用文献数

3

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In order to prevent the mine pollution caused by the acid mine drainage (AMD) from abandoned metal mines in Japan, the treatment of AMD has been conducted with neutralization using a significant number of reagents. Passive treatment processes are attractive as an alternative because of an energy and cost saving one. Although the passive treatment processes using sulfate-reducing bacteria (SRB) have been investigated widely in the United States and Europe, many of those processes require a huge area that is necessary for a long hydraulic retention time (HRT). So, in this research, the mechanism, influential factors and performance of metal removal using SRB have been investigated in the column test to develop it as a prospective, effective and compact process. The results showed that sulfate reduction by SRB had continued for 140 days under the condition of a 50-hour HRT, and that metals had been removed as sulfides in a column. In addition, it is apparent that the positions where each metal sulfide was precipitated were different. This means that the quality of AMD is an important factor when the treatment facility is designed.