open access

https://hdl.handle.net/2115/97403

Arsenic Removal From Acid Mine Drainage Using Acid-Tolerant Bacteria

英語

metal removal

2025-01

John Wiley & Sons

Clean : soil, air, water

53(1)

e70000

Acid mine drainage (AMD) has a low pH and contains harmful metals, making it a severe problem in the mining industry. Neutralization treatment using slaked lime is widely applied to remove potentially toxic metals and adjust the pH. However, this generates neutralized sludge containing large amounts of harmful metals. Therefore, in this study, we propose a bacterial bioprocess for removing metals before neutralization. Acid- and metal-tolerant bacteria were isolated from neutral soils and utilized as As removers from AMD. The Paenathrobacter sp. strain H1 removed As (43.6%) and Fe (10.6%) from AMD in a single-batch test (pH 1.95; initial concentrations were 6.13 and 283 mg L-1, respectively). Repeated batch tests using fresh cells enhanced the As removal ratio, achieving successful removal of As (95.3%) and Fe (75.5%). Although further research is required, this study has substantial implications for the development of a sustainable AMD treatment to suppress harmful waste generation.

学術雑誌論文

Accepted Manuscript

This is the peer reviewed version of the following article: Iwama, S., Takano, C., Nakashima, K., Aoyagi, H. and Kawasaki, S. (2025), Arsenic Removal From Acid Mine Drainage Using Acid-Tolerant Bacteria. CLEAN – Soil, Air, Water, 53: e70000, which has been published in final form at https://doi.org/10.1002/clen.70000. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.

1863-0650