Eficacia del permanganato potásico en la degradación de cianuro y tiocianato en aguas residuales mineras
This work was focused on evaluating the viability of potassium permanganate as an oxidizing agent for the simultaneous degradation of cyanides and thiocyanates from an acid mine wastewater. Data has confirmed the effectiveness of permanganate solutions for the oxidation of cyanides, with removal efficiencies between 95-100 %, in waters with an initial concentration of cyanides of 312 mg/L and thiocyanates of 314 mg/L. In contrast, the chemical oxidation of thiocyanates with permanganate was less efficient, with overall yields below 50 % for the highest oxidant concentrations assayed. Furthermore, the studies from synthetic water confirmed that the partial oxidation of thiocyanates using permanganate results in the release of a residual amount of cyanides that remains in the treated water. For this reason, the simultaneous oxidation of cyanides and thiocyanates in not complete for any of the studied industrial wastewaters, finding not negligible residual concentrations of both cyanide and thiocyanate, after the reaction with permanganate. This makes it necessary to consider further treatments of the wastewater for a full removal of the cyanide species.
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | artículo biblioteca |
| Language: | Spanish / Castilian |
| Published: |
Universidad Nacional Autónoma de México
2021
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| Subjects: | Cyanide species, Chemical oxidation, acid mine wastewater, |
| Online Access: | http://hdl.handle.net/10261/244357 http://dx.doi.org/10.13039/501100003329 |
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