Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide
Cyanidation is widely used by most gold mine worldwide and will remain prevail in years (or decades) to come, while cyanide is hazardous, toxic pollutants whose presence in wastewater and tailings can seriously affect human and its environment; hence, it is necessary to control these contaminants. T...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/5640963 |
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| author | Dongzhuang Hou Lang Liu Qixing Yang Bo Zhang Huafu Qiu Shishan Ruan Yue Chen Hefu Li |
| author_facet | Dongzhuang Hou Lang Liu Qixing Yang Bo Zhang Huafu Qiu Shishan Ruan Yue Chen Hefu Li |
| author_sort | Dongzhuang Hou |
| collection | DOAJ |
| description | Cyanidation is widely used by most gold mine worldwide and will remain prevail in years (or decades) to come, while cyanide is hazardous, toxic pollutants whose presence in wastewater and tailings can seriously affect human and its environment; hence, it is necessary to control these contaminants. The purpose of this study was to examine the effects through the investigation of changes in pH, concentration, and contact time, and the optimal conditions were obtained. It has been proven that the decomposition of cyanide in solution and tailings increased as the alkalinity in the presence of 0.5 g/L Na2S2O5. An increase in H2O2 (30%) concentration (from 1 to 4 mL/L) increased the decomposition in solution, while the effect on removing cyanide was better when pH was 9 than 8 and 10 in tailings. The cyanide in tailings decreased in the first 4 h and increased after 4 h. The effective and economic conditions for maximum decomposition of cyanide from leach tailings are first treated in 0.5 g/L Na2S2O5 at pH 10 for 3 hours and then 2 mL/L H2O2 (30%) is added to the tailings at pH 9 for 4 hours through comparative study. The findings provide the basis to optimize the decomposition of cyanide from gold leaching tailings in mining or backfilling by using the synergetic effect of Na2S2O5 and H2O2. |
| format | Article |
| id | doaj-art-6c6cc29da7024fc3bc2955ac2f42b0c8 |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-6c6cc29da7024fc3bc2955ac2f42b0c82025-08-20T02:06:44ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/56409635640963Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen PeroxideDongzhuang Hou0Lang Liu1Qixing Yang2Bo Zhang3Huafu Qiu4Shishan Ruan5Yue Chen6Hefu Li7College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaEnergy School, Xi’an University of Science and Technology, Xi’an 710054, ChinaCollege of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaShanyang Qinding Mining Co. Ltd., Shangluo, 726400, Shanxi, ChinaCyanidation is widely used by most gold mine worldwide and will remain prevail in years (or decades) to come, while cyanide is hazardous, toxic pollutants whose presence in wastewater and tailings can seriously affect human and its environment; hence, it is necessary to control these contaminants. The purpose of this study was to examine the effects through the investigation of changes in pH, concentration, and contact time, and the optimal conditions were obtained. It has been proven that the decomposition of cyanide in solution and tailings increased as the alkalinity in the presence of 0.5 g/L Na2S2O5. An increase in H2O2 (30%) concentration (from 1 to 4 mL/L) increased the decomposition in solution, while the effect on removing cyanide was better when pH was 9 than 8 and 10 in tailings. The cyanide in tailings decreased in the first 4 h and increased after 4 h. The effective and economic conditions for maximum decomposition of cyanide from leach tailings are first treated in 0.5 g/L Na2S2O5 at pH 10 for 3 hours and then 2 mL/L H2O2 (30%) is added to the tailings at pH 9 for 4 hours through comparative study. The findings provide the basis to optimize the decomposition of cyanide from gold leaching tailings in mining or backfilling by using the synergetic effect of Na2S2O5 and H2O2.http://dx.doi.org/10.1155/2020/5640963 |
| spellingShingle | Dongzhuang Hou Lang Liu Qixing Yang Bo Zhang Huafu Qiu Shishan Ruan Yue Chen Hefu Li Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide Advances in Materials Science and Engineering |
| title | Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide |
| title_full | Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide |
| title_fullStr | Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide |
| title_full_unstemmed | Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide |
| title_short | Decomposition of Cyanide from Gold Leaching Tailingsby Using Sodium Metabisulphite and Hydrogen Peroxide |
| title_sort | decomposition of cyanide from gold leaching tailingsby using sodium metabisulphite and hydrogen peroxide |
| url | http://dx.doi.org/10.1155/2020/5640963 |
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