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Enhanced utilization efficiency of peroxymonosulfate via water vortex-driven piezo-activation for removing organic contaminants from water

The efficient activation and utilization of peroxymonosulfate (PMS) in PMS-based advanced oxidation processes is a high-priority target for the removal of organic contaminants. This work introduces a water vortex-driven piezoelectric effect from few-odd-layered MoS2 into the PMS activation to remove...

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Published in:Environmental science and ecotechnology 2022-04, Vol.10, p.100165, Article 100165
Main Authors: Yu, Chuan, He, Jie, Lan, Shenyu, Guo, Wanqian, Zhu, Mingshan
Format: Article
Language:English
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Summary:The efficient activation and utilization of peroxymonosulfate (PMS) in PMS-based advanced oxidation processes is a high-priority target for the removal of organic contaminants. This work introduces a water vortex-driven piezoelectric effect from few-odd-layered MoS2 into the PMS activation to remove benzotriazole (BTR) and other organic contaminants from the water. Approximately 91.1% of BTR can be removed by the MoS2 piezo-activated PMS process with a reaction rate constant of 0.428 min−1, which is 2.09 times faster than the sum of the individual MoS2, water vortex, and piezocatalysis rates. Meanwhile, the PMS utilization efficiency reached 0.0147 in the water vortex-driven piezo-activation system, which is 3.97 times that of the sum from the vortex/PMS and MoS2/PMS systems. These results demonstrate that the presence of MoS2 under a water vortex can trigger a piezoelectric potential and generate abundant free electrons to activate PMS to generate various active species for degradation of organic contaminants. [Display omitted] •Water vortex-driven piezo-effect of MoS2 was applied for PMS activation.•Organic pollutants were degraded in water vortex-driven piezo-activated PMS process.•PMS utilization efficiency was significantly improved by piezo-effect.•Different reactive oxygen species were generated and 1O2 played the major role.
ISSN:2666-4984
2096-9643
2666-4984
DOI:10.1016/j.ese.2022.100165