期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 36, 期 6, 页码 965-974出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-018-0230-1
关键词
Imidacloprid; Persulfate; Photocatalysis; Photovoltaics; TiO2-Fe3O4; UV-LED
资金
- University of Zanjan
- Semnan University
- University of Texas at Arlington
To facilitate decomposition of imidacloprid (IMD), as a persistent probe insecticide, TiO2-Fe3O4 (TF) nanocomposite was synthesized and characterized. TF particles in size of 50-60 nm with band-gap of 2.8 eV were immobilized onto glass tubes and utilized as a photocatalyst irradiated with ultraviolet-light emitting diode (UV-LED) powered by photovoltaics. Synergistic decomposition of IMD in the photocatalytic reactor injected with persulfate (PS) was investigated. Along with various control and reference tests, parametric studies to evaluate the effects of PS concentration, IMD concentration, and circulation rate on IMD decomposition kinetics and electrical energy consumption were performed. The contribution of various physical and chemical mechanisms to IMD removal was discussed, including self-decomposition, direct photolytic decomposition, chemical oxidation by PS, photolysis of PS to produce sulfate radicals, Fenton-like reaction to produce sulfate radicals, photocatalysis to generate hydroxyl radicals, and adsorption onto catalysts. TF conjugated with PS under UV-LED synergistically decomposed IMD. Additionally, results demonstrated the synergy index factor of 75%, 65%, and 60% for IMD degradation by UV-LED/TF/PS, UV-LED/Fe3O4/PS, and UV-LED/TiO2/PS routes, respectively. Outcomes also showed that utilizing TF can greatly reduce electrical energy consumption. Since all devices used in this study, including UV-LED, were powered solely by a photovoltaic module, the immobilized TF photoreactor was proposed as a sustainable, self-powered, energy-saving, and practical point-of-use decontamination system to remove organic contaminants in water under solar radiation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据