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有效处理含有Cu2+的酸性矿井排水,使用抗酸性铜的电活性生物膜

Jing Song¹, Xin Nong¹, You Li¹

¹Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, 541004, China; Guangxi Key Laboratory of Landscape Resources Conservation and Sustainable Utilization in Lijiang River Basin, Guangxi Normal University, Guilin, 541004, China; College of life sciences, Guangxi Normal University, Guilin, 541004, China.

Journal of environmental management

|May 24, 2025

概括

这项研究成功丰富了强大的电活性生物膜 (EAB),能够处理酸性矿井排水 (AMD) 和去除铜离子. 开发的微生物燃料电池 (MFC) 实现了高功率密度和高效的铜去除,为AMD修复提供了有前途的生物电化学技术.

科学领域:

环境科学与工程环境科学与工程
微生物学微生物学
电化学电化学电化学

背景情况:

酸性矿井排水 (AMD) 由于其酸性和金属污染,造成了重大环境挑战.
强大的电活性生物膜 (EAB) 在治疗AMD及其修复机制方面的潜力在很大程度上尚未被探索.
微生物燃料电池 (MFC) 提供了一种潜在的生物电化学方法,用于同时产生能量和去除污染物.

研究的目的:

为了从AMD沉积物中丰富酸性-铜性双抗性阳极EAB.
在不同酸度和铜度下研究这些EAB的电化学性能.
阐明在没有膜的MFC中通过EAB去除铜 (Cu2+) 的机制.

主要方法:

在不同的pH条件下从AMD沉积物中丰富阳极EAB.
构建和运行无膜MFC来测试EAB性能.
电化学测量 (输出电压,功率密度) 和Cu2+去除效率的分析.
使用表面吸附和共同沉识别的机制分析,以及微生物社区结构分析.

主要成果:

增加的酸度抑制了阳极EAB的电化学性能,在较低的pH值下观察到较低的输出电压.
EABs表现出对50毫克L-1Cu2+的弹性,铜去除后的性能立即恢复.
在pH值3.0进行缩的EAB实现了高功率密度 (97.25 mW m^{-2) 和高Cu²⁺除去 (92.47%).}
Cu2+的去除涉及EAB表面的吸附和作为CuS和Cu2O的共同沉.
微生物群落在酸度上有显著差异,在pH值3.0上丰富的*Alicyclobacillus*和*Thiomonas*.

结论:

强大的阳EAB可以成功地从AMD环境中丰富,即使在高度酸性条件下.
这些EAB在MFC中表现出显著的电化学活性和高效的铜修复能力.
该研究提供了对EAB丰富和开发用于AMD治疗的生物电化学技术的机制的关键见解.

关键词:

酸矿井排水系统酸矿井排水系统铜的去除铜的去除电动生物膜是一种电动生物膜.微生物燃料电池是一种微生物燃料电池.具有抗性具有抗性

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