硅藻土负载MnFe<sub>2</sub>O<sub>4</sub>纳米颗粒活化PMS降解金橙Ⅱ

张理军; 严群; 周子琳; 陈燕; 陈锦富

doi:10.13205/j.hjgc.202211009

硅藻土负载MnFe₂O₄纳米颗粒活化PMS降解金橙Ⅱ

doi: 10.13205/j.hjgc.202211009

张理军^1,3,
严群^2, ,,
周子琳²,
陈燕¹,
陈锦富²

1. 江西理工大学资源与环境工程学院, 江西赣州 341000;
2. 江西理工大学土木与测绘工程学院, 江西赣州 341000;
3. 江西理工大学赣江流域水质安全保障工程技术研究中心, 江西赣州 341000

详细信息

作者简介:
张理军(1997-),男,硕士,主要研究方向为水污染控制理论与污水资源化利用。995758417@qq.com

通讯作者:
严群(1973-),女,博士,副教授,主要研究方向为水污染控制理论与资源化。1068630@qq.com

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出版历程
- 收稿日期: 2022-03-08
- 网络出版日期: 2023-03-24

NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS

1. School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. School of Civil and Surveying&Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
3. Research Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, China

摘要

摘要: 采用溶胶-凝胶法制备硅藻土/MnFe₂O₄复合型催化剂（DMF），以金橙Ⅱ为目标污染物，分析DMF活化过一硫酸盐（PMS）的性能和作用机制。结果表明：1） MnFe₂O₄颗粒均匀负载于硅藻土上，使DMF具有更好的分散性和活化性；2） DMF对PMS的活化能力优于单一MnFe₂O₄，DMF （1：1）/PMS体系降解金橙Ⅱ符合准一级动力学模型，且降解速率是MnFe₂O₄/PMS体系的2.16倍，0.5 g/L DMF和0.5 mmol/L PMS在40 min内对50 mg/L金橙Ⅱ降解率达到93.1%；3）反应体系中存在·OH、SO₄^-·、¹O₂、·O₂^- 4种活性物种，其中·OH和SO₄^-·起主导作用；4） DMF复合材料具有更好的结构稳定性，金属离子溶出量远低于MnFe₂O₄。研究结果可为新型高效PMS催化剂在处理工业废水的实际应用提供参考。
- 高级氧化 /
- MnFe₂O₄ /
- 硅藻土 /
- 过一硫酸盐 /
- 金橙Ⅱ MnFe₂O₄
Abstract: Diatomite/MnFe₂O₄ composite catalyst (DMF) was rationally synthesized by sol-gel method. The performance and reaction mechanism of DMF activated peroxymonosulfate (PMS) were degraded with orange Ⅱ as the target pollutant. The results showed that:1) MnFe₂O₄ particles were uniformly loaded on diatomite and DMF had better dispersion and stability; 2) DMF had a better catalytic activity to PMS than MnFe₂O₄ so that the degradation rate of DMF/PMS system for orange Ⅱ removal was 2.16 times that of MnFe₂O₄ system, the reaction process could be fitted by the pseudo-first-order kinetic pattern. A degradation rate of 93.1% could be achieved within 40 min for 50 mg/L AO₂ by 0.5 g/L DMF and 0.5 mmol/L PMS; 3) there were four active radicals ·OH、SO₄^-·、¹O₂ and ·O₂^- in the reaction system, and OH and SO₄^- play the main role; 4) DMF had better structural stability and its metal ion dissolution was much lower than MnFe₂O₄. This study paved a way for the practical application of the new PMS activators in industrial wastewater treatment.
- advanced oxidation /
- MnFe₂O₄ /
- diatomite /
- peroxymonosulphate /
- orange Ⅱ

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参考文献(29)

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