Dead biomass of Amazon yeast: A new insight into bioremediation and recovery of silver by intracellular synthesis of nanoparticles

Autor(es)

Salvadori, Marcia R. ^[1] ; Ando, Romulo A. ^[2] ; Oller Nascimento, Claudio A. ^[3] ; Correa, Benedito ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Biomed Inst 2, Dept Microbiol, BR-05508000 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Chem, Dept Fundamental Chem, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Dept Chem Engn, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING; v. 52, n. 11, p. 1112-1120, 2017.
• Citações Web of Science: 1

Resumo

This investigation was undertaken to describe a natural process for the removal of silver and the simultaneous recovery of Ag/Ag2O nanoparticles by dead biomass of the yeast Rhodotorula mucilaginosa. The removal of silver ions from aqueous solution and the synthesis of Ag/Ag2O nanoparticles were analyzed based on physicochemical factors and equilibrium concentration, combined with transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and infrared spectroscopy (FTIR). A successful process for the synthesis of Ag/Ag2O nanoparticles was obtained, following the Langmuir isotherm model, showing a high biosorption capacity of silver (49.0mgg(-1)). The nanoparticles were spherical, had an average size of 11.0nm, were synthesized intracellularly and capped by yeast proteins. This sustainable protocol is an attractive platform for the industrial-scale production of silver nanoparticles and of a silver nanobiosorbent. (AU)

• Processo FAPESP: 16/04364-5 - Diversidade do complexo de espécies Fusarium graminearum provenientes de grãos de trigo e gramíneas nativas do Brasil.
• Beneficiário: Benedito Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Regular