二氧化碳和弱磁场增强铁碳微电解结合自性脱
Wei Xing1, Guangxin Zhou2, Daoqing Gao3
1Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Environment, Beijing Jiaotong University, Beijing 100044, PR China; Tangshan Research Institute of Beijing Jiaotong University, Hebei 063000, PR China.
Bioresource technology
|June 21, 2024
概括
这项研究通过使用二氧化碳和弱磁场 (WMF) 来增强废水中酸盐的去除,显著提高效率并防止铁的被动化. 综合方法还可以减少温室气体排放,提高工艺稳定性.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 生物地质化学生物地质化学
背景情况:
- 废水中的酸盐污染对环境构成重大风险.
- 铁碳微电解和自性脱是废水处理的关键方法.
- 在这些过程中,铁被动化和pH不稳定是主要的挑战.
研究的目的:
- 研究二氧化碳 (CO2) 和弱磁场 (WMF) 对酸盐去除效率的联合影响.
- 为了解决微电解和脱过程中的铁被动化和pH稳定性问题.
- 评估CO2和WMF对温室气体排放和微生物群落的影响.
主要方法:
- 四个连续反应堆的建造和运行:控制,仅CO2,仅WMF和CO2+WMF.
- 在相关反应堆中应用弱磁场 (10和35mT).
- 分析总去除效率,铁物种转化和N2O排放流量.
- 评估微生物群落结构和酶活性.
主要成果:
- CO2 + WMF处理显著提高了总去除效率,达到96.2% ± 1.6% (10mT) 和94.1% ± 2.7% (35mT),相比之下,对照组的51.6% ± 2.7%.
- 由于Fe3O4转化为FeO(OH) 和FeCO3.3,因此防止了铁的被动化.
- 减少了8.7% (10mT) 和20.5% (35mT) 的N2O排放流量.
- 相对酶活性和脱细菌的丰富性增加,包括未分类的Rhodocyclaceae和Denitratisoma.
结论:
- 二氧化碳和WMF的协同应用有效地优化了废水中酸盐的去除.
- 这种综合方法提高了处理效率,减轻了铁的被动化,并减少了温室气体排放.
- 该研究强调了CO2和WMF在稳定和高效的废水脱化方面的潜力.
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