Hierarchical Bi0.5Fe0.5VO4/honeycomb ceramic plate synergize plasma induce multi-catalysis by constructing a plasma-catalyst system for organic pollutant degradation

介质阻挡放电 催化作用 矿化(土壤科学) 降级(电信) 化学 化学工程 污染物 等离子体 陶瓷 废水 电介质 材料科学 环境工程 复合材料 有机化学 环境科学 物理 量子力学 计算机科学 氮气 工程类 电信 光电子学
作者
Yongyang Chen,Xiaomin Sun,Yixuan Huang,Dan Guo,Lijiao Zheng,Yuan Liu,Shanping Li
出处
期刊:Separation and Purification Technology [Elsevier BV]
卷期号:286: 120444-120444 被引量:12
标识
DOI:10.1016/j.seppur.2022.120444
摘要

• A novel and efficient technology of coupling DBD and catalyst was investigated. • DBD plasma induces multi-catalysis by activating Bi 0.5 Fe 0.5 VO 4 /HCP. • Bi 0.5 Fe 0.5 VO 4 /HCP enhances energy utilization and avoids secondary pollution. • DH degradation behavior, pathways, and toxicity of products were analyzed. • The potential DBD plasma-catalyst reaction mechanism was proposed. Highly efficient Bi 0.5 Fe 0.5 VO 4 /honeycomb ceramic plate (Bi 0.5 Fe 0.5 VO 4 /HCP) was successfully prepared and placed in the discharge zone of the dielectric barrier discharge (DBD) to construct a DBD plasma-catalyst system. Doxycycline Hyclate (DH), an antibiotic widely used in aquaculture was selected to estimate the catalytic activity. The synergistic effect makes the system exhibit excellent catalytic activity and mineralization ability. A series of characterization technologies were employed to systematically investigate the as-prepared photocatalysts. Additionally, the effect of different initial conditions (pH, power, water matrices, etc.) on DH removal was evaluated. The 3D EEMs results distinctly present the process of DH being mineralized, and the significantly enhanced TOC removal rate indicates that Bi 0.5 Fe 0.5 VO 4 can promote the increase of mineralization rate. The formation and role of active specials ( OH, O 3 , and H 2 O 2 , etc.) were also deeply investigated. Furthermore, possible DH degradation pathways were proposed based on LC-MS analysis and theoretical calculations. Comprehensive toxicity analysis revealed that a decreasing trend in the toxicity of the intermediates. Eventually, the DBD plasma-catalyst reaction mechanism was investigated in detail. This study provides an effective and simple technical route to combine different advanced oxidation processes in a synergistic way to treat wastewater.
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