Constructed stationary wetland for acid mine drainage treatment from the Mesapata-Catac Mineral Concentration Plant

• Autores: Vergaray Andagua, Libi Ursula, León Lucio, Palma, Palomino Cadenas, Julio, Muro Raúl, Loayza, Mejía Melanie, Moreno, Mario Vladimir, Leyva Collas
• Formato: artículo
• Fecha de Publicación: 2022
• Institución: Universidad Nacional Santiago Antúnez de Mayolo
• Repositorio: Revistas - Universidad Nacional Santiago Antunez de Mayolo
• Lenguaje: español
• OAI Identifier: oai:ojs.192.168.1.71:article/927
• Enlace del recurso: http://revistas.unasam.edu.pe/index.php/Aporte_Santiaguino/article/view/927
• Nivel de acceso: acceso abierto
• Materia: Humedal construido; compost y BSR; fitorremediación; drenaje ácido de mina.

The purpose of this research was to reduce de iron concentration and raise the pH of the Acid Mine Drainage (AMD: [Fe]=800 ppm; pH=2.6) from the Mesapata Concentrattion Plant with a constructed stationary wetland using the consortium of native phytoremediating species (Juncus imbricatus, Distichia muscoides, Typha angustifolia) and Sulfate Reducing Bacteria (BSR). The stationary wetland (length, 64 cm; width, 45 cm; height, 32) was built with 4 components in the following order: (a) BSR up to 5 cm; (b) gravel (diameter, 2 cm) up to 8 cm; (c) compost, up to 17 cm; and, (d) phytoremediating species, planted vegetatively on the substrate. The wetland reached its satability in a month; time at which the AMD was added (up to a height of 27 cm with a clearance of 5 cm) for its treatment. To determine the efficiency of the wetland, the iron concentration (MColortest Iron test kit -  Merk) and the pH (potentiometer) in the AMD and in the wetland effluent were analyzed; reaching an efficiency of 99,8% for the immobilization of iron and an increase in pH to 7,92; this efficiency was repeated up to at least five consecutive times.