用硫化纳米零价值铁 (S-nZVI) 激活的硫酸盐系统中的酸降解:性能和机制
Ruzhuang Zhang1, Yi Zhu2, Jiaqi Dong3
1Shanghai Chengtou Environmental Ecological Remediation Technology Co., LTD, Shanghai 200331, China
概括
硫化纳米零价值铁 (S-nZVI) 有效地激活硫酸盐 (PS) 来降解地下水中的危险 (FLT). 这种S-nZVI/PS工艺在去除多环芳 (PAHs) 方面表现有前途.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
背景情况:
- 酸 (FLT) 是一种危险的污染物,经常出现在地下水中.
- 对于FLT污染的水源,需要有效的整治策略.
研究的目的:
- 通过使用硫化纳米零价值铁 (S-nZVI) 激活硫酸盐 (PS) 来研究FLT的降解.
- 确定涉及的活性氧物种 (ROS) 并阐明降解途径.
- 评估在各种水条件下以及其他多环芳 (PAHs) 的过程的有效性.
主要方法:
- 使用S-nZVI作为催化剂来激活PS用于FLT降解.
- 研究了试剂剂量,pH值,离子,湿酸和表面活性剂的影响.
- 采用了激素探测实验,EPR,扫除测试和GC-MS来识别ROS和降解中间体.
主要成果:
- 在最佳的S-nZVI和PS度下,在120分钟内达到96.2%的FLT去除.
- 在S-nZVI表面的S(-II) 促进了Fe(II) 的再生,增强了催化活性.
- 鉴定出基 (HO•) 和硫酸盐基 (SO4•−) 是导致FLT降解的主要ROS.
- 证明有效降解纳夫他林和,表明广泛的PAH去除.
结论:
- 在FLT降解方面,PS/S-nZVI工艺非常有效,观察到显著的去除率.
- 该S-nZVI/PS系统在各种水条件中表现出强大的性能,并显示出修复各种受PAH污染的地下水的潜力.
- 这项研究强调了PS/S-nZVI工艺作为一项有前途且高效的地下水整治技术.
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