浸出物和高度新兴污染物四环素的降解通过电氧化
Siyi Li1, Qiaona Xie1, Mingdi Yang1
1College of Civil Engineering, Zhejiang University of Technology, Hangzhou 310023, China.
Journal of environmental sciences (China)
|September 26, 2025
概括
一个新的三维电化学氧化 (3D-ECO) 系统有效地降解了垃圾填埋场液 (LL) 中的四环素 (TC). 该系统利用优化的粒子电极和操作条件,通过非激进途径实现高COD和TC去除率.
科学领域:
- 环境科学与工程环境科学与工程
- 电化学 电化学 电化学
- 水处理技术水处理技术
背景情况:
- 垃圾填埋场液 (LL) 由于复杂的有机污染物,包括像四环素 (TC) 这样的药物,造成了重大环境风险.
- 传统的治疗方法往往难以有效地从LL中去除反抗性化合物.
- 电化学氧化为废水处理提供了一个有前途的先进氧化工艺.
研究的目的:
- 构建和优化一个三维电化学氧化 (3D-ECO) 系统,用于降解垃圾填埋场液 (LL) 中的四环素 (TC).
- 研究各种操作参数对处理效率的影响.
- 在3D-ECO系统中阐明TC的降解机制.
主要方法:
- 使用各种阳极材料 (Ti/RuO2-IrO2,Ti/Pt-RuO2-IrO2,Ti/SnO2-Sb2O3) 和阴极板 (,不钢) 的3D-ECO系统的开发.
- 三维粒子电极 (GAC,CBC,WBC,BBC) 和操作参数 (pH,电流密度,粒子剂量,粒子大小,电极间距) 的选和优化.
- 使用EPR光谱和Tert-Butanol (TBA) 火实验来阐明机制.
主要成果:
- 确定了最佳运行条件:pH值5,电流密度为30mA/cm2,粒子剂量为7g/L,粒子大小为1.702.00mm,电极间距为4cm.
- 在最佳条件下,3D-ECO系统在3小时内实现了90.25%的COD去除,72.41%的TC去除和39.52%的NH3-N去除.
- TC去除遵循伪第一阶动力学,降解主要通过非激进 (1O2) 途径发生.
结论:
- 开发的3D-ECO系统对复杂的LL矩阵和TC的同时降解非常有效.
- 微粒电极和操作参数的优化显著提高了处理效率.
- 了解非激素降解途径为设计更高效的电化学处理过程提供了洞察力.
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