使用绿色合成酵母支持的铁纳米颗粒进行有效的异质芬顿式降解甲蓝
Guorong Shi1, Shuangqing Zeng2, Yefeng Liu3
1School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
Ecotoxicology and environmental safety
|July 13, 2023
概括
这项研究引入了酵母支持的铁纳米粒子 (nZVI@SCM) 进行高效的甲蓝 (MB) 降解. 这种新型催化剂减少了氧化剂和催化剂的使用,同时使催化剂在芬顿式反应中可重复使用.
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:
- 芬顿类反应对于降解有机污染物至关重要,但由于高氧化剂和催化剂消耗而受到影响.
- 开发可重复使用和高效的催化剂对于可持续的废水处理至关重要.
- 在酵母生物质上支持的铁纳米粒子为异质催化提供了一个有希望的方法.
研究的目的:
- 为了合成和描述酵母支持的铁纳米粒子 (nZVI@SCM) 进行异质的芬顿式的甲蓝 (MB) 降解.
- 评估nZVI@SCM催化剂的催化性能,可重复使用性和稳定性.
- 调查降解机制并确定参与MB去除的反应性物种.
主要方法:
- 使用烟草叶提取物合成nZVI@SCM的合成.
- 使用XPS,SEM,FT-IR和XRD进行表征.
- 在环境条件下的甲蓝降解实验,监测MB和TOC去除.
- 分析铁漏,反应性氧化物种和催化剂的可重复使用性.
- 使用液体染色学/质谱学识别降解中间体.
主要成果:
- 在使用低催化剂 (0.1 g/L) 和氧化剂 (1.0 mM H2O2) 度的情况下,nZVI@SCM在10小时内实现了99.7%的MB去除和97.2%的TOC去除.
- 随着MB降解,出现了伪第一阶动力学,其中基激素被确定为主要的活性物种.
- 催化剂表现出良好的稳定性,较低的铁液,在多个循环中具有很好的可重复使用性.
结论:
- 酵母支持的铁纳米粒子 (nZVI@SCM) 为MB降解提供了高效和可重复使用的异质催化剂.
- 这一策略显著减少了氧化剂和催化剂的消耗,为处理有机污染物提供了可持续的替代方案.
- 开发的催化剂为增强环境应用中的芬顿式降解过程提供了一条新的途径.
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