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Qu G, Ji W, Li J, Liang S, Li Z, Tang H, Zhou J, Ning P. Degradation mechanism of HCN by electrochemically coupled copper-loaded magnetic nanoparticles in a liquid phase pseudo-homogeneous system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:60811-60822. [PMID: 35435546 DOI: 10.1007/s11356-022-20195-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Hydrogen cyanide (HCN) comes from a wide range of sources, but it is highly toxic and corrosive, harming the environment and human health. This experiment used magnetic nano-Fe3O4 particles loaded with Cu (Cu-Fe3O4 magnetic nanoparticles) for electrochemical catalytic purification of HCN in a liquid phase pseudo-homogeneous system. The results show that the purification efficiency of Cu-Fe3O4 magnetic nanoparticles on HCN is 70% without electricity. After a certain voltage is applied, the degradation efficiency of 2 h with iron-carbon particles is significantly improved, and the degradation efficiency can reach about 95%. And the degradation efficiency increases with the increase of voltage. The electrochemical synergistic degradation mechanism of Cu-Fe3O4 magnetic nanoparticles is complex, which can directly catalyze the degradation of HCN or form CNO- intermediates to further degrade into CO2, H2O, and NH3. Meanwhile, Fe2+, Cu+, and other transition metal ions in the liquid phase participate in the Fenton-like reaction to further degrade HCN. The results show that the synergistic electrochemical degradation of HCN by Cu-Fe3O4 magnetic nanoparticles has excellent potential to degrade highly toxic gases.
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Affiliation(s)
- Guangfei Qu
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Wei Ji
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Junyan Li
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China.
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China.
| | - Shuaiyu Liang
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Zhishuncheng Li
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Huimin Tang
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Junhong Zhou
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science & Technology, Kunming, 650500, Yunnan, China
- National Regional Engineering Research Center-NCW, Kunming, 650500, Yunnan, China
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