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

---

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

---

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.