在Cu@CC-PS-MFC系统中的批量和流量反应中,电沉积铜增强了2,4-二二醇的去除
Minjie Zhu1, Hongyuan Wang2, Chunji Li1
1National Engineering Laboratory for Site Remediation Technologies/MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, China.
Chemosphere
|August 13, 2023
概括
这项研究将微生物燃料电池 (MFC) 与先进的氧化过程 (AOP) 结合起来,使用带铜的碳布有效降解2,4-二二 (2,4-DCP). 新的Cu@CC-PS-MFC系统显著提高了污染物去除和矿化与能量回收.
科学领域:
- 环境科学 环境科学
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
背景情况:
- 微生物燃料电池 (MFC) 提供可持续的能源发电和废水处理.
- 先进的氧化工艺 (AOP) 是有效的降解持久性有机污染物.
- 将MFC和AOP结合在一起,为提高污染物清除提供了一个有希望的方法.
研究的目的:
- 开发和评估一个带Cu0的碳布阴极 (Cu@CC-PS-MFC),用于增强2,4-二二 (2,4-DCP) 的降解.
- 调查硫酸盐 (PS) 激活和反应性物种生成的机制.
- 评估Cu@CC-PS-MFC系统在各种条件下的性能,包括流动操作和矿化.
主要方法:
- 在碳布上放置Cu0的电极,形成Cu@CC阴极.
- 将Cu@CC阴极集成到微生物燃料电池系统中,添加硫酸盐.
- 对2,4-DCP降解效率,矿化和溶解铜离子度的分析.
- 研究铜价值状态的变化和反应性氧物种 (ROS) 的识别.
主要成果:
- 与对照组 (49.2%) 相比,Cu@CC-PS-MFC在1小时内实现了显著更高的2,4-DCP去除 (75.6%).
- 在优化条件下,在9小时内实现了30 mg/L 2,4-DCP和80.6%矿化量的完全去除.
- 稳定>90%的2,4-DCP去除在流量运行中保持稳定,液压停留时间为7.2h.
- 主要机制涉及Cu0/Cu2O/CuO价值变化激活PS,产生OH和1O2物种.
结论:
- 碳布上的电沉积铜在MFC系统内通过PS激活有效地增强了2,4-DCP降解.
- MFC生物极促进铜种的现场再生,有助于催化剂的稳定性和寿命.
- 这种综合方法提供了高效的污染物清除和同时的能量回收,扩大了MFC应用.
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