Resourceful treatment of complex uranium-organic wastewater by a hybrid tandem photocatalytic fuel cell with SnS2 nanoplate modified carbon felt cathode

IF 12.2 1区 环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL
Rongzhong Wang , Yaqian Zhang , Xuemei Sun , Qingyan Zhang , Zhaowen Cheng , Wenjing Xue , Qingyi Zeng
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Abstract

Resourceful treatment of wastewater is a promising way to facilitate sustainable development. Recently, photocatalytic fuel cells (PFCs) have attracted widespread attention as the method that can synchronously achieve wastewater treatment and clean energy production only depend on light. However, few PFCs focused on treating complex uranium (U(VI))-organic wastewater. This study prepared a SnS2 nanoplate decorated carbon felt (SnS2/CF) material by facile hydrothermal method and used as the cathode to construct a hybrid tandem photocatalytic fuel cell (HTPFC) system. Compared to the CF-HTPFC, the removal efficiencies of U(VI) and tetracycline hydrochloride (TCH) increased to 3.4 and 1.8 times in the SnS2/CF-HTPFC system, accompanied with the reaction rate (kobs) values increased to 30.39 and 3.78 times, respectively. More importantly, under real sunlight irradiation (From 10:00 to 16:00), the removal efficiencies of U(VI) and TCH respectively reached 92.49 % and 97.96 %, and the Pmax reached 6.49 mW·cm−2. HTPFC also displayed satisfactory performances in treating radioactive wastewater containing different organic compounds, with the removal efficiencies of U(VI) and organic compounds both exceeded 93.35 %. The loading of SnS2 nanoplates enhanced electrochemical performance and introduced abundant S active sites, allowing more U(VI) to be adsorbed and reduced, and simultaneously promoting the removal of organic matter by improving the charge separation efficiency.

Abstract Image

采用 SnS2 纳米板修饰碳毡阴极的混合串联光催化燃料电池资源化处理复杂的铀有机废水
废水资源化处理是促进可持续发展的一条大有可为的途径。最近,光催化燃料电池(PFCs)作为一种仅依靠光就能同步实现废水处理和清洁能源生产的方法引起了广泛关注。然而,很少有 PFC 专注于处理复杂的铀 (U(VI)) 有机废水。本研究采用简便的水热法制备了SnS2纳米板装饰碳毡(SnS2/CF)材料,并以此为阴极构建了混合串联光催化燃料电池(HTPFC)系统。与 CF-HTPFC 相比,SnS2/CF-HTPFC 系统对 U(VI)和盐酸四环素(TCH)的去除率分别提高了 3.4 倍和 1.8 倍,反应速率(kobs)值也分别提高了 30.39 倍和 3.78 倍。更重要的是,在实际日光照射下(10:00 至 16:00),U(VI)和 TCH 的去除率分别达到 92.49 % 和 97.96 %,Pmax 达到 6.49 mW-cm-2。HTPFC 在处理含有不同有机化合物的放射性废水时也表现出令人满意的性能,对 U(VI)和有机化合物的去除率均超过 93.35%。SnS2纳米板的负载增强了电化学性能,并引入了丰富的S活性位点,使更多的U(VI)被吸附和还原,同时通过提高电荷分离效率促进了有机物的去除。
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来源期刊
Journal of Hazardous Materials
Journal of Hazardous Materials 工程技术-工程:环境
CiteScore
25.40
自引率
5.90%
发文量
3059
审稿时长
58 days
期刊介绍: The Journal of Hazardous Materials serves as a global platform for promoting cutting-edge research in the field of Environmental Science and Engineering. Our publication features a wide range of articles, including full-length research papers, review articles, and perspectives, with the aim of enhancing our understanding of the dangers and risks associated with various materials concerning public health and the environment. It is important to note that the term "environmental contaminants" refers specifically to substances that pose hazardous effects through contamination, while excluding those that do not have such impacts on the environment or human health. Moreover, we emphasize the distinction between wastes and hazardous materials in order to provide further clarity on the scope of the journal. We have a keen interest in exploring specific compounds and microbial agents that have adverse effects on the environment.
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