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

ZHANG Lijun; YAN Qun; ZHOU Zilin; CHEN Yan; CHEN Jinfu

doi:10.13205/j.hjgc.202211009

Volume 40 Issue 11

Nov. 2022

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ZHANG Lijun, YAN Qun, ZHOU Zilin, CHEN Yan, CHEN Jinfu. NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 61-68. doi: 10.13205/j.hjgc.202211009

Citation:

ZHANG Lijun, YAN Qun, ZHOU Zilin, CHEN Yan, CHEN Jinfu. NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 61-68. doi: 10.13205/j.hjgc.202211009

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

doi: 10.13205/j.hjgc.202211009

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

Received Date: 2022-03-08
Available Online: 2023-03-24

Abstract

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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References(29)

References

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