| Article |
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| Article name |
Comparative Evaluation of Cyanide Waste Detoxification Technologies: Environmental and Economic Benefits of Ozonation |
| Authors |
Olberg E.Р. Head of the Laboratory of the Environmental Protection Department, eolberg@mail.ruChikin A.Y. doctor of technical sciences, professor, anchik53@mail.ruNepomnyashchikh M.P. Candidate of Biological Sciences, Senior Researcher, Environmental Protection Department, Ph. D., belykhmarina606@gmail.comVoiloshnikov G.I. Doctor of Technical Sciences, Professor, Deputy General Director for Scientific, Methodological and Innovation Activities, greg@irgiredmet.ru |
| Bibliographic description |
Olberg EР, Chikin AYu, Nepomnyashchikh MP, Voiloshnikov GI. Comparative Evaluation of Cyanide Waste Detoxification Technologies: Environmental and Economic Benefits of Ozonation. Transbaikal State University Journal. 2026;32(1):54-64. (In Russian). https://www.doi.org/10.21209/2227-9245-2026-32-1-54-64 |
| Category |
Subsoil Use, Mining Sciences |
| DOI |
УДК 316.77; 353.2 |
| DOI |
https://www.doi.org/10.21209/2227-9245-2026-32-1-54-64 |
| Article type |
Original article |
| Annotation |
The gold mining industry produces cyanide-containing waste, which is mainly detoxified using the chlorination method. This reagent has a negative impact on the composition of recycled water and the hazard class of waste. The search for and implementation of “green technologies” at enterprises that do not have a negative effect on the treated waste is an urgent task. The objects of research are to determine the cyanide waste from the ore deposits of the Kamchatka Territory and the economic component of the Republic of Bashkortostan. The purpose of the research is to determine the environmental and economic efficiency of using ozonation to decontaminate cyanide waste, compared to other known technologies. The objectives of the research are to decontaminate the waste and determine the toxicity of the tailings. The research also included a technical and economic comparison of the technologies based on their operating costs. The following methods of oxidation of toxic compounds are used: chlorination at pH 11,2–11,4 and pH 10,7, ozonation, peroxydation, INCO, followed by oxidation with calcium hypochlorite. When determining the toxicity of the solid phase of waste after detoxification, Daphnia magna Straus and Chlorella vulgaris Beijer have been used as test objects. A low level of mineralization of the liquid phase of the pulp is observed after treatment of the tailings with ozone and hydrogen peroxide. Based on the effectiveness of cyanide and thiocyanate removal, it is found that all methods except peroxydation (the residual concentration of CN- was 1,2 mg/L, and SCN- increased to 100 mg/L) can oxidize toxic compounds. The 5th hazard class for the environment of the neutralized cyanide tailings has been determined after treatment with ozone and hydrogen peroxide, and the 4th hazard class has been determined after treatment with other oxidizing agents. As a result, it is found that ozonation provides the required depth of oxidation of CN- and SCN-, resulting in the formation of almost non-hazardous waste. Based on a technical and economic comparison of ozone with other technologies, an economic benefit is determined in terms of operating costs. This technology is an alternative method for detoxifying cyanide-containing waste compared to traditional chlorination.
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| Key words |
cyanidation waste, ozone, chlorination, INCO, neutralization, hazard class, detoxification, peroxidation, and technical and economic comparison, сounterflow decantation washing
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| Article information |
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| References |
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