基于细菌的生物炭作为硫酸盐激活剂来降解有机污染物
Na Yu1, Hanyu Ma1, Zhihong Wen1
1School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, China.
概括
这项研究引入了一种来自细菌的新型生物炭催化剂,以激活废水处理的硫酸盐. 新的催化剂有效降解罗达胺B,为先进的氧化过程提供一种可持续的方法.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 微生物学 微生物学
背景情况:
- 基于碳的催化剂对于在废水处理的先进氧化过程 (AOP) 中激活硫酸盐至关重要.
- 开发可持续和高效的催化剂是环境修复的持续挑战.
研究的目的:
- 为了准备一种新的基于生物炭的催化剂 (MBC) 从Shewanella oneidensis MR-1进行硫酸盐激活.
- 通过先进的氧化过程评估MBC在降解Rhodamine B (RhB) 的效率.
- 研究MBC/硫酸盐系统的催化机制和稳定性.
主要方法:
- 从Shewanella oneidensis MR-1中制成的生物炭 (BC) 制剂.
- 使用MBC和硫酸盐 (PS) 去除罗达胺B的催化降解实验.
- 在不同PS和MBC剂量和pH条件下降解效率的分析.
- 自由基灭试验和电子磁共振 (EPR) 谱学以确定活性物种.
主要成果:
- MBC有效地激活了PS来降解RhB,在270分钟内实现了91.70%的去除.
- 降解效率随着PS和MBC剂量增加而增加.
- 该MBC/PS系统在广泛的pH范围内表现出良好的性能,并在5个周期内表现出稳定性 (72.07%的RhB去除).
- 确定了自由基 (•OH,SO4•-) 和非自由基 (1O2) 的机制,这些机制都对RhB降解有贡献.
结论:
- 谢瓦尼拉oneidensisMR-1衍生生物炭是激活AOPs中的硫酸盐的有希望的绿色催化剂.
- MBC/PS系统为Rhodamine B降解提供了一种高效和稳定的方法.
- 这项研究突出了细菌在生物炭生产中用于环境修复的新应用.
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