固定床催化抗生素通过单片氧介导的非激素氧化解毒:机制和长期性能
Guang-Chi Liu1, Xing-Yuan Liu1, Xiao-Hong Yi1
1Research Center of Environmental Functional Materials, Institute of Advanced Materials, Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation, Key Laboratory of Urban Stormwater System and Water Environment (Ministry of Education), Beijing University of Civil Engineering and Architecture, Beijing 100044, PR China.
一个固定ZIF-67催化剂有效地使用单氧分解抗生素. 这种环保材料在连续流系统中具有很高的稳定性和有效性,为废水处理提供了一个有前途的解决方案.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 抗生素耐药性是一个日益增长的全球威胁,需要先进的废水处理方法.
- 传统的治疗方法难以去除持久性有机污染物,如诺基诺抗生素.
- 开发稳定,高效和环保的催化剂对于有效的水资源整治至关重要.
研究的目的:
- 设计和合成一个固定ZIF-67衍生的催化剂 (Co-N/C@EP-600) 以有效的抗生素排毒.
- 研究催化机制,专注于单片氧介导的非激素氧化.
- 评估催化剂在连续流系统中的稳定性,可重复使用性和性能,以及其环境安全性.
主要方法:
- 合成ZIF-67衍生的Co-N/C@EP-600催化剂.
- 使用X射线吸收细结构 (XAFS) 和密度函数理论 (DFT) 的表征.
- 氧硫酸盐 (PMS) 激活用于降解牛素 (OFC) 和其他污染物.
- 机械学研究包括火试验,电子自旋共振 (ESR) 和同位素实验.
- 超过30个周期的稳定性测试和连续流动反应堆实验.
- 毒性评估 (微生物,活性污泥,植物毒性).
主要成果:
- Co-N/C@EP-600催化剂显示了OFC (>99%在20分钟内) 和其他污染物的超快降解.
- 单片氧 (1O2) 被确定为主要的活性氧物种.
- 催化剂表现出极好的稳定性 (>90%的效率超过30个循环) 与最小的浸出.
- 在连续流动反应堆中证实了长期的性能,降解OFC和ENR (ENR) 长达30天.
- 综合性毒性测定证实了诺基诺抗生素的实质性解毒.
结论:
- 固定化的Co-N/C@EP-600催化剂通过O2介导的非激素氧化有效地排毒抗生素.
- 催化剂独特的Co-N3-NCs结构增强了PMS激活和污染物降解.
- 高稳定性,可重复使用性和在连续流动中经过验证的性能使其适合于实际的废水处理.
- 开发的催化剂为清除耐火有机污染物和减轻抗生素耐药性提供了一个环保和持久的解决方案.
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