Mass Transfer-Promoted Fe2+/Fe3+Circulation Steered by 3D Flow-Through Co-Catalyst System Toward Sustainable Advanced Oxidation Processes

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外文摘要：Realizing fast and continuous generation of reactive oxygen species(ROSs)via iron-based advanced oxi-dation processes(AOPs)is significant in the environmental and biological fields.However,current AOPs assisted by co-catalysts still suffer from the poor mass/electron transfer and non-durable promotion effect,giving rise to the sluggish Fe2+/Fe3+cycle and low dynamic concentration of Fe2+for ROS produc-tion.Herein,we present a three-dimensional(3D)macroscale co-catalyst functionalized with molybde-num disulfide(MoS2)to achieve ultra-efficient Fe2+regeneration(equilibrium Fe2+ratio of 82.4％)and remarkable stability(more than 20 cycles)via a circulating flow-through process.Unlike the conven-tional batch-type reactor,experiments and computational fluid dynamics simulations demonstrate that the optimal utilization of the 3D active area under the flow-through mode,initiated by the convection-enhanced mass/charge transfer for Fe2+reduction and then strengthened by MoS2-induced flow rotation for sufficient reactant mixing,is crucial for oxidant activation and subsequent ROS generation.Strikingly,the flow-through co-catalytic system with superwetting capabilities can even tackle the intricate oily wastewater stabilized by different surfactants without the loss of pollutant degradation efficiency.Our findings highlight an innovative co-catalyst system design to expand the applicability of AOPs based technology,especially in large-scale complex wastewater treatment.

外文关键词：

Advanced oxidation processes3D co-catalystFlow-through modeEnhanced mass transferComplex wastewater treatment

作者：

Weiyang Lv、Hao Li、Jinhui Wang、Lixin Wang、Zenglong Wu、Yuge Wang、Wenkai Song、Wenkai Cheng、Yuyuan Yao

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作者单位：

National Engineering Lab of Textile Fiber Materials and Processing Technology(Zhejiang),Zhejiang Sci-Tech University,Hangzhou 310018,China

Zhejiang Provincial Innovation Center of Advanced Textile Technology,Shaoxing 312000,China

Jiangsu Ruiya Stirring Technology Co.,Ltd.,Yixing 214200,China

基金：

National Natural Science Foundation of ChinaZhejiang Provincial Natural Science Foundation of ChinaChina Postdoctoral Science Foundation

项目编号：

52003240LQ21B0700072022M722818

出版年：

2024

DOI：

10.1016/j.eng.2023.06.010

工程(英文)

CSTPCDEI

ISSN：2095-8099

年,卷(期)：2024.36(5)