通过使用碳基材料的活性硫酸盐对p-Nitrophenol的降解
Carmen S D Rodrigues1, Sofia N A Aziz2, M F R Pereira3
1LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
用铁改性碳材料有效地使用活性硫酸盐从废水中去除p-nitrophenol (PNP). 该Fe/XG材料表现出高效率和稳定性,性能优于芬顿工艺.
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:
- 废水被p-nitrophenol (PNP) 污染需要有效的清除方法.
- 活性硫酸盐 (PS) 氧化是一种有前途的先进氧化过程,用于污染物降解.
研究的目的:
- 评估基于碳的材料,包括碳凝 (XG),碳纳米管 (CNT) 和活性炭 (AC),通过活性PS去除PNP.
- 研究铁浸和兴奋剂对这些碳材料性能的影响.
- 为了比较激活PS工艺的疗效与Fenton工艺的PNP去除.
主要方法:
- 合成和描述原始的,添加的和铁浸的碳材料 (XG,CNT,AC).
- 在酸性条件下使用激活PS工艺的PNP和总有机碳 (TOC) 去除效率的评估.
- 在多个反应周期中对材料稳定性和铁液的评估.
- 氧化中间产物的鉴定和主要基物种的阐明.
主要成果:
- 在活性PS工艺中,铁浸的碳 (Fe/XG) 具有最高的PNP去除率 (75.7%) 和TOC去除率 (63.3%).
- 兴奋剂增强了所有测试的碳材料的PNP降解和矿化.
- 铁/XG表现出极好的稳定性,并且在四个反应周期中没有铁液,与添加XG (XGM) 不同.
- 激活的PS工艺实现了完全PNP氧化和~96%的TOC去除,超过了芬顿工艺.
结论:
- 用铁浸的碳凝是使用活性硫酸盐从废水中去除PNP的高效和稳定的催化剂.
- 活性硫酸盐工艺,特别是Fe/XG,为高效的废水处理提供了比芬顿工艺更好的替代方案.
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