Producción CyT
Artículo
Autoría
Leon Fernandez, Luis Fernando
;
Medina Díaz, Hassay Lizeth
;
GONZALEZ PEREZ, OMAR
;
Rodríguez Romero, Luis
;
Villaseñor, José
;
Fernández Morales, Francisco Jesús
Fecha
2021
Editorial y Lugar de Edición
JOHN WILEY & SONS LTD
Revista
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY,
vol. 96
(pp. 1543-1552)
JOHN WILEY & SONS LTD
Resumen
Información suministrada por el agente en
SIGEVA
BACKGROUND: This work studied the treatment of and metal recovery from a synthetic acid mine drainage (AMD) containing 500 mg L?1 copper (Cu2+) and iron (Fe+3), and 50 mg L?1 nickel (Ni2+) and tin (Sn2+) by using a bioelectrochemical system (BES). The presence of electroactive bacteria improved the performance of such reactor configuration, by contrast with systems with abiotic anodes. RESULTS: Operating as a microbial fuel cell (MFC), all of the Fe3+ was reduced to Fe2+ in about 24 h and Cu2+ ...
BACKGROUND: This work studied the treatment of and metal recovery from a synthetic acid mine drainage (AMD) containing 500 mg L?1 copper (Cu2+) and iron (Fe+3), and 50 mg L?1 nickel (Ni2+) and tin (Sn2+) by using a bioelectrochemical system (BES). The presence of electroactive bacteria improved the performance of such reactor configuration, by contrast with systems with abiotic anodes. RESULTS: Operating as a microbial fuel cell (MFC), all of the Fe3+ was reduced to Fe2+ in about 24 h and Cu2+ was electrodeposited onto the cathodic surface, a Cu electrode, obtaining pure Cu0. Almost all of the Cu in the catholyte was recovered after four days. The maximum current density and power attained in this stage were 0.136 mA cm?2 and 0.0134 mW cm?2, respectively. Subsequent operation as a microbial electrolysis cell (MEC) allowed simultaneous recovery of the Fe2+, Ni2+ and Sn2+ by fixing the cathode potential at ?0.7 V versus Ag/AgCl. The electrode material in this stage was titanium. The tin was completely deposited onto the cathodic surface after one day of electrolysis. After three days, 77% and 60% of Ni and Fe, respectively, was recovered. CONCLUSION: It was possible to recover Cu0 while generating electricity at the same time using a BES. The cell voltage required for the metal electrodeposition of Fe2+, Ni2+ and Sn2+ was low in the case of the BES because of the contribution of the electroactive bacteria. Sequential metal deposition is possible by adjusting the operating parameters of the BES reactors.
Ver más
Ver menos
Palabras Clave
METAL RECOVERYBIOELECTROCHEMICAL SYSTEMMICROBIAL FUEL CELLACID MINE DRAINAGEMICROBIAL ELECTROMETALLURGYMICROBIAL ELECTROLYSIS CELL
Descargue o solicite el texto completo