过氧酸:是一种持续释放的活性氧载体,具有增强的PAHs污染土壤修复性能
Jiajie Zhou1, Yan Tian2, Chen Yan1
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
过氧酸 (PPB) 为土壤整治提供了一种安全,环保的解决方案,通过现场化学氧化 (ISCO) 有效降解多环芳 (PAH). 这种新型氧化剂显著优于传统过氧化物.
科学领域:
- 环境化学环境化学
- 土壤科学 土壤科学
- 氧化技术 氧化技术
背景情况:
- 在现场化学氧化 (ISCO) 需要安全,高效和环保的氧化剂.
- 多环芳 (PAH) 是土壤持续污染的污染物.
研究的目的:
- 评估过氧酸盐 (PPB) 作为用于土壤修复的新型氧化剂.
- 评估基于PPB的化学氧化 (PPB-CO) 对降解PAHs的效率.
主要方法:
- 实验室规模的土壤处理使用PPB-CO.
- 对PAH去除速率的分析 (纳夫他林,,烯).
- 研究反应性氧物种 (ROS) 生成机制.
主要成果:
- 在24小时内,PPB-CO实现了高的PAH去除率:72.1%的甲烯,64.2%的甲烯,50.0%的烯.
- 总PAH去除效率 (60.6%) 是商业过氧化物的3.6-4.7倍.
- PPB产生了多个ROS (H2O2,O2•−,OH,1O2),并将H2O2利用率提高了86%.
结论:
- 过氧酸是ISCO的高效和新型氧化剂.
- PPB-CO 显示了实在在的土壤整治应用的巨大潜力.
- 这项研究引入了一项有前途的新策略,用于处理受PAH污染的土壤.
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