水流驱动的MoS<sub>2</sub>/PVDF多孔膜降解水中四环素机理

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Abstract In advanced oxidation processes (AOPs) based on peroxymonosulfate (PMS), efficient activation and utilization of PMS was considered to be an important goal for the removal of organic pollutants. The piezoelectric effect driven by water flow was introduced into PMS activation in this study, using the prepared MoS₂/PVDF membrane as a piezoelectric membrane to remove tetracycline (TC) from water. The degradation efficiency of TC by MoS₂/PVDF membrane was 77.9% within 60min was showed in the results, with a reaction rate constant of 0.0231min^-1, which was higher than that of MoS₂ (0.0135min^-1) and PVDF (0.0085min^-1). Sacrificial agent experiments combined with LC-MS were used to explore the intermediates of the TC degradation process and analyze the reaction mechanism. In cycling experiments, the excellent reusability and recyclability was exhibited in MoS₂/PVDF membranes. These results indicated that under the mechanical vortex force of water flow, MoS₂/PVDF membrane can trigger piezoelectric potential and generate abundant free electrons to activate PMS, thereby producing various active substances to degrade organic pollutants.

Key words： peroxymonosulfate piezoelectric effect tetracycline polyvinylidene difluoride

Received: 01 July 2024

PACS:

X703.5

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	Articles by authors
	WANG Yue-lu
	HAI Shi-kun
	HAN Jia-jun
	ZHANG Jin-xiao
	ZHAI Yuan-meng

Cite this article:

WANG Yue-lu,HAI Shi-kun,HAN Jia-jun等. Degradation mechanism of tetracycline in water by MoS₂/PVDF porous membrane driven by water flow[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(2): 795-802.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I2/795

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