Isolation of fungal strains from a tailings pond for lead and cadmium bioremediation

• Autores: APAZA-AQUINO, Hugo, VALDERRAMA VALENCIA, María del Rosario
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Universidad César Vallejo
• Repositorio: Revista UCV-HACER
• Lenguaje: español
• OAI Identifier: oai:ojs.pkp.sfu.ca:article/2629
• Enlace del recurso: http://revistas.ucv.edu.pe/index.php/UCV-HACER/article/view/2629
• Nivel de acceso: acceso abierto

Environmental contamination by heavy metals represents a serious problem for humans and the ecosystem due to its degree of toxicity, which is why it is necessary to have treatment alternatives for its disposal. The bioremediation process of the lead (II) and cadmium (II) metals was carried out; through the use of native fungi isolated from the oxidation pool of the metallurgical laboratory of the National University of San Agustín, Arequipa -Peru; in Sabouraud dextrose and potato dextrose broth culture media, the fungal strains were cultivated to carry out the lead (II) and cadmium (II) removal tests, a batch system was used and the removal percentage was determined. Rhizopus spand Aspergillus nigerwere isolated and identified; in the removal tests it was determined that Rhizopus spwas the strain that most removed the lead (II) in 86.39 %, cadmium (II) in 69.23 % and the mixture in 74.82 %. On the other hand Aspergillus nigerremoves lead (II) in 74.19 %, cadmium (II) in 44.72 % and the mixture in 66.90 % and for the biomass consortium Aspergillus niger-Rhizopus spremoves lead (II) in 84.17 %, cadmium (II) in 43.42 %, and the mixture at 53.43 %. Rhizopus spand Aspergillus nigerfungal biomass efficiently removes lead (II) and cadmium (II) metals, representing a potential alternative for bioremediation processes. Keywords: Aspergillus niger, biomass, heavy metals, removal, Rhizopus sp.