Arsenic Removal From Acid Mine Drainage Using Acid-Tolerant Bacteria

IF 1.5 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES

Clean-soil Air Water Pub Date : 2025-01-27 DOI:10.1002/clen.70000

Sohei Iwama, Chikara Takano, Kazunori Nakashima, Hideki Aoyagi, Satoru Kawasaki

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引用次数: 0

Abstract

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.

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来源期刊

Clean-soil Air Water 环境科学-海洋与淡水生物学

CiteScore

2.80

自引率

5.90%

发文量

审稿时长

3.6 months

期刊介绍： CLEAN covers all aspects of Sustainability and Environmental Safety. The journal focuses on organ/human--environment interactions giving interdisciplinary insights on a broad range of topics including air pollution, waste management, the water cycle, and environmental conservation. With a 2019 Journal Impact Factor of 1.603 (Journal Citation Reports (Clarivate Analytics, 2020), the journal publishes an attractive mixture of peer-reviewed scientific reviews, research papers, and short communications. Papers dealing with environmental sustainability issues from such fields as agriculture, biological sciences, energy, food sciences, geography, geology, meteorology, nutrition, soil and water sciences, etc., are welcome.