Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid
Cu and other elements in waste acid from copper smelting flue gas sulphuric acid system have high extraction value. In this paper aiming at the precipitation reaction process of Cu2+ with S2O32-, through experiments, thermodynamic calculation, and product characterization, the precipitation reaction...
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| Format: | Article |
| Language: | English |
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Editorial Office of Journal of Taiyuan University of Technology
2022-01-01
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| Series: | Taiyuan Ligong Daxue xuebao |
| Subjects: | |
| Online Access: | https://tyutjournal.tyut.edu.cn/englishpaper/show-1659.html |
| _version_ | 1797208387349381120 |
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| author | Xingkai WANG Yibing LI Zhonglin ZHANG Ranran QIAO Yu LI Shibin LIU |
| author_facet | Xingkai WANG Yibing LI Zhonglin ZHANG Ranran QIAO Yu LI Shibin LIU |
| author_sort | Xingkai WANG |
| collection | DOAJ |
| description | Cu and other elements in waste acid from copper smelting flue gas sulphuric acid system have high extraction value. In this paper aiming at the precipitation reaction process of Cu2+ with S2O32-, through experiments, thermodynamic calculation, and product characterization, the precipitation reaction way of Cu2+ was systematically investigated and analyzed. The kinetic parameters of the main reaction and the side reaction in the vulcanization system were determined experimentally to clarify the law of factors which affect the reaction rate. The experimental results show that: S2O32- and Cu2+ directly participate in the reaction to produce CuS, and the reaction process is accompanied by the disproportionation side reaction of S2O32- and H+. The reaction order of S2O32-+Cu2+ is higher than that of S2O32-+H+, and the reaction activation energy of the former is greater than that of the latter. Therefore, increasing the concentration of the vulcanizing agent and increasing the reaction temperature can significantly increase the main reaction selectivity. When the reaction temperature is 80 ℃, the molar ratio of S2O32- to Cu2+ is 2∶1, and the reaction time is 120 min, the removal rate of Cu2+ reaches 99.45%. |
| first_indexed | 2024-04-24T09:38:00Z |
| format | Article |
| id | doaj.art-c215f83688614c48aded2854bbbde66e |
| institution | Directory Open Access Journal |
| issn | 1007-9432 |
| language | English |
| last_indexed | 2024-04-24T09:38:00Z |
| publishDate | 2022-01-01 |
| publisher | Editorial Office of Journal of Taiyuan University of Technology |
| record_format | Article |
| series | Taiyuan Ligong Daxue xuebao |
| spelling | doaj.art-c215f83688614c48aded2854bbbde66e2024-04-15T08:41:31ZengEditorial Office of Journal of Taiyuan University of TechnologyTaiyuan Ligong Daxue xuebao1007-94322022-01-01531273510.16355/j.cnki.issn1007-9432tyut.2022.01.0041007-9432(2022)01-0027-09Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste AcidXingkai WANG0Yibing LI1Zhonglin ZHANG2Ranran QIAO3Yu LI4Shibin LIU5College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCollege of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaCu and other elements in waste acid from copper smelting flue gas sulphuric acid system have high extraction value. In this paper aiming at the precipitation reaction process of Cu2+ with S2O32-, through experiments, thermodynamic calculation, and product characterization, the precipitation reaction way of Cu2+ was systematically investigated and analyzed. The kinetic parameters of the main reaction and the side reaction in the vulcanization system were determined experimentally to clarify the law of factors which affect the reaction rate. The experimental results show that: S2O32- and Cu2+ directly participate in the reaction to produce CuS, and the reaction process is accompanied by the disproportionation side reaction of S2O32- and H+. The reaction order of S2O32-+Cu2+ is higher than that of S2O32-+H+, and the reaction activation energy of the former is greater than that of the latter. Therefore, increasing the concentration of the vulcanizing agent and increasing the reaction temperature can significantly increase the main reaction selectivity. When the reaction temperature is 80 ℃, the molar ratio of S2O32- to Cu2+ is 2∶1, and the reaction time is 120 min, the removal rate of Cu2+ reaches 99.45%.https://tyutjournal.tyut.edu.cn/englishpaper/show-1659.htmlwaste acidcopper ionsodium thiosulfatesulfidation reactionreaction pathway |
| spellingShingle | Xingkai WANG Yibing LI Zhonglin ZHANG Ranran QIAO Yu LI Shibin LIU Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid Taiyuan Ligong Daxue xuebao waste acid copper ion sodium thiosulfate sulfidation reaction reaction pathway |
| title | Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid |
| title_full | Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid |
| title_fullStr | Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid |
| title_full_unstemmed | Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid |
| title_short | Study on the Reaction Behavior of Sodium Thiosulfate and Copper Ion in Waste Acid |
| title_sort | study on the reaction behavior of sodium thiosulfate and copper ion in waste acid |
| topic | waste acid copper ion sodium thiosulfate sulfidation reaction reaction pathway |
| url | https://tyutjournal.tyut.edu.cn/englishpaper/show-1659.html |
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