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可见光照射增强硫化零价值铁/氧单硫酸盐工艺用于有机污染物降解

Jialu Xu¹, Hao Cheng¹, He Zhang¹

¹College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China; Hunan Key Laboratory of Wetland and Soil Ecological Restoration, Central South University of Forestry and Technology, Changsha, 410004, China.

Environmental research

|June 2, 2024

概括

一种新的硫化零价值铁/氧硫酸盐/可见光 (S-mZVI/PMS/vis) 工艺有效降解有机污染物. 这种先进的氧化过程显示出高稳定性和可用于水处理的可重复使用性.

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:

有机污染物对水生生态系统和人类健康构成重大风险.
传统的处理方法往往在效率和完全去除污染物方面扎.
先进的氧化工艺 (AOP) 为污染物降解提供了有前途的解决方案.

研究的目的:

开发和评估一种新的S-mZVI/PMS/vis工艺,以提高有机污染物的降解.
研究S-mZVI/PMS/vis系统的催化活性,效率和稳定性.
阐明降解机制和反应性物种的作用.

主要方法:

硫化零价值铁 (S-mZVI) 的合成.
实验设置涉及S-mZVI,过氧硫酸盐 (PMS) 和可见光照射.
使用罗达胺B (RhB) 作为模型污染物的降解实验.
激光火试验和电子偏磁共振 (EPR) 分析.

主要成果:

在S-mZVI/PMS/vis过程中,在10分钟内实现了99.6%的RhB去除.
与单独的S-mZVI/PMS和PMS/vis相比,降解率常数显著更高.
该工艺在广泛的pH范围 (3.0-9.0) 中表现出卓越的效率,并且在五个周期内具有良好的可重复使用性.
超氧化基 (·O2-),单氧 (1O2) 和孔 (h+) 被确定为关键的反应物种.

结论:

S-mZVI/PMS/vis工艺是有机污染物降解的高效AOP.
可见光照射通过改善Fe3+/Fe2+循环来增强PMS激活.
S-mZVI表现出极好的稳定性和可重复使用性,使其成为净化水的有希望的催化剂.

关键词:

先进的氧化过程 (AOP)过氧单硫酸盐的使用硫化零价值铁 (S-mZVI) 是一种可见光辐射辐射的可见光辐射.

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