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Article

Effective Gold Biosorption by Electrospun and Electrosprayed Bio-Composites with Immobilized Lysinibacillus sphaericus CBAM5

1
Microbiological Research Center (CIMIC), Department of Biological Sciences, Universidad de Los Andes, Bogotá 111711, Colombia
2
Nanobiotechnology and applied microbiology (NANOBIOT), Department of Biological Sciences, Universidad de Los Andes, Bogotá 111711, Colombia
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(3), 408; https://doi.org/10.3390/nano10030408
Received: 16 December 2019 / Revised: 27 January 2020 / Accepted: 1 February 2020 / Published: 26 February 2020
(This article belongs to the Section Nanocomposite Materials)
Electro-hydrodynamic processing, comprising electrospinning and electrospraying techniques, is a novel technology used in the production of nano- and sub-micro-scale materials with specific properties suitable for environmental remediation processes. Polycaprolactone (PCL) micro-fibrous mats and alginate microcapsules were produced using electrospinning and electrospraying techniques respectively, and Lysinibacillus sphaericus CBAM5, a bacterium capable of metal removal by adsorption and accumulation inside the cell, was immobilized in these matrices. The polymeric structure was able to protect and maintain cell viability and the bio-composite materials were used to capture gold from synthetic water samples. The micro-fibrous membranes with immobilized bacteria were able to remove 93% of the gold after 120 h of inclusion in the aqueous medium. Using a filtration system, an efficiency of 64% was obtained for the removal of the precious metal after 10 cycles of filtration (2 h of exposure to the gold solution). In contrast, the microencapsulated L. sphaericus CBAM5 captured 64% of the gold after 4 h of the assay. Thus, both micro-structured matrices were suitable for the immobilization and protection of L. sphaericus CBAM5 and they showed high efficiencies of gold biosorption. Hence, these bio-composite materials could be used to concentrate gold from industrial wastewaters. View Full-Text
Keywords: gold; electrospinning; electrospraying; polycaprolactone; alginate; Lysinibacillus sphaericus CBAM5 gold; electrospinning; electrospraying; polycaprolactone; alginate; Lysinibacillus sphaericus CBAM5
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MDPI and ACS Style

Páez-Vélez, C.; Castro-Mayorga, J.L.; Dussán, J. Effective Gold Biosorption by Electrospun and Electrosprayed Bio-Composites with Immobilized Lysinibacillus sphaericus CBAM5. Nanomaterials 2020, 10, 408. https://doi.org/10.3390/nano10030408

AMA Style

Páez-Vélez C, Castro-Mayorga JL, Dussán J. Effective Gold Biosorption by Electrospun and Electrosprayed Bio-Composites with Immobilized Lysinibacillus sphaericus CBAM5. Nanomaterials. 2020; 10(3):408. https://doi.org/10.3390/nano10030408

Chicago/Turabian Style

Páez-Vélez, Carolina, J. L. Castro-Mayorga, and Jenny Dussán. 2020. "Effective Gold Biosorption by Electrospun and Electrosprayed Bio-Composites with Immobilized Lysinibacillus sphaericus CBAM5" Nanomaterials 10, no. 3: 408. https://doi.org/10.3390/nano10030408

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