电刺激增强了酸盐的去除,并减轻了因脱诱导的化而产生的酸盐的积累
Yulong Wang1, Daxin Sun1, Yongheng Zhan1
1School of Water Resources and Environment, MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing, 100083, China.
Environmental research
|December 10, 2025
概括
在以棉花为基础的生物膜电极反应器 (CBER) 中的电刺激通过增强脱化和抑制酸盐积累,有效地减少了地下水的酸盐污染. 这种方法优化了去除和微生物功能.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 地下水的酸盐污染是一个全球性问题.
- 脱过程中的自我化导致酸盐的积累,阻碍了的去除.
- 生物膜电极反应器提供了去除的潜力,但在pH控制方面面临着挑战.
研究的目的:
- 研究电刺激对棉花基生物膜电极反应器 (CBER) 脱性能的影响.
- 评估电刺激对微生物酶活性和社区结构的影响.
- 了解电刺激减轻自我化和酸盐积累的机制.
主要方法:
- 基于棉花的生物膜电极反应堆 (CBER) 的建造和运行.
- 应用不同的电刺激电流密度 (0-300 mA/m2).
- 测量酸盐和酸盐度,系统pH值,酶活性 (酸盐和酸盐减少酶) 和微生物群体组成 (16SrRNA测序).
主要成果:
- 在100mA/m2的电刺激下,酸盐去除率增加了21.4%,酸盐积累减少了99.2%.
- 适度电刺激 (100 mA/m2) 增强了酸盐和酸盐还原酶活动,而高电流密度 (300 mA/m2) 诱导了氧化应激.
- 电刺激增加了蛋白质细菌和功能性类型 Pseudomonas 的相对丰富性,使微生物群落转向去除.
结论:
- 电刺激是一种有效的策略,可以抑制CBER系统中的自我化和酸盐积累.
- 该机制涉及增强的酶活性和微生物社区结构的转变,有利于脱.
- 结果为优化生物电化学系统提供了洞察力,以有效地从污染的地下水中去除.
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