金属硫化物的被动化由海洋细菌用于酸性矿井排水控制
Qian Li1, Jiaxin Li1, Lijuan Zhang2
1Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China.
Journal of hazardous materials
|October 10, 2024
概括
海洋细菌生物膜有效地被动化矿和尾矿,防止酸性矿井排水. 这种环保的生物矿物化方法大大减少了金属的释放,并消除了液对植物的毒性.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 地质化学 地质化学
背景情况:
- 酸性矿井排水 (AMD) 是一种主要的环境问题,由硫化金属的氧化引起.
- AMD会产生酸性,富含金属的液,污染水和土壤.
- 目前的整治方法往往是昂贵的,对环境造成负担.
研究的目的:
- 开发一种新的,环保的方法来使矿和-尾矿被动化.
- 利用海洋细菌生物膜诱导生物矿物化和分离金属硫化物.
- 评估生物被动化层的稳定性和生态毒性.
主要方法:
- 培养海洋细菌 *Qipengyuania flava* S1 形成生物膜.
- 将生物薄膜应用于金和-尾矿,以诱导生物矿物化.
- 在酸性H2O2溶液中浸泡生物受体化材料180天.
- 通过种植 *Brassica chinensis *和 *Allium cepa * *来评估液毒性.
主要成果:
- 生物被动化减少了至少99.2%的铁释放.
- 从-尾矿中释放的金属离子 (Fe+Al+Pb+Zn) 减少了至少52.0%.
- 生物被动化层保持了浸出物pH值在7.5-8.0之间,并消除了植物毒性.
结论:
- 海洋细菌生物膜为AMD修复提供了有效和可持续的解决方案.
- 由*Qipengyuania flava*S1生物膜诱导的生物矿物化成功地使硫化物矿物被动化.
- 这种生物被动化方法减轻了与酸性矿井排水相关的环境风险.
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