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- W4376106070 endingPage "121809" @default.
- W4376106070 startingPage "121809" @default.
- W4376106070 abstract "The efficient release of arsenic in copper smelting flue dust (CSFD) with complicated production conditions and composition under the premise of environmental safety is difficult for the copper smelting industry. The vacuum environment is conducive to the volatilization of low-boiling arsenic compounds, which is beneficial to the physical process and chemical reaction of increasing the volume. In the present study, combined with thermodynamic calculations, the roasting process of pyrite and CSFD mixed in proportion in vacuum was simulated. Additionally, the release process of arsenic and the interaction mechanism of the main phases were performed in detail. The addition of pyrite facilitated the decomposition of stable arsenate in CSFD into volatile arsenic oxides. The results indicated that exceeding 98% of arsenic in CSFD volatilized into the condenser, while the arsenic content in the residue was reduced to 0.32% under optimal conditions. Pyrite could reduce the oxygen potential during the chemical reaction with CSFD, reacting with sulfates in CSFD to convert into sulfides and magnetic iron oxide (Fe3O4) simultaneously, and Bi2O3 would be transformed into metallic Bi. These findings are significant for developing arsenic-containing hazardous waste treatment routes and the application of innovative technical approaches." @default.
- W4376106070 created "2023-05-12" @default.
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- W4376106070 date "2023-08-01" @default.
- W4376106070 modified "2023-10-16" @default.
- W4376106070 title "Arsenic release pathway and the interaction principle among major species in vacuum sulfide reduction roasting of copper smelting flue dust" @default.
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- W4376106070 doi "https://doi.org/10.1016/j.envpol.2023.121809" @default.
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