Palladium recovery as nanoparticles by an anaerobic bacterial community

BACKGROUND Bio‐recovery of metals from dilute industrial waste using bacteria is a promising alternative to primary raw material resources. Therefore, the search for and identification of palladium resistant bacteria with the ability to remove that metal from solutions is very important. The main go...

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Published inJournal of chemical technology and biotechnology (1986) Vol. 88; no. 11; pp. 2039 - 2045
Main Authors Martins, Mónica, Assunção, Ana, Martins, Hélio, Matos, António Pedro, Costa, Maria Clara
Format Journal Article
LanguageEnglish
Published Chichester, UK John Wiley & Sons, Ltd 01.11.2013
Wiley
Wiley Subscription Services, Inc
Subjects
Applied sciences
Bacteria
bacterial community
Bacteroides
bio-recovery
Chemical engineering
Communities
Exact sciences and technology
Nanomaterials
Nanoparticles
Nanostructure
Palladium
Searching
Sulfates
nanoparticles
Anaerobe
Nanoparticle
bio-recovery
Bacteria
palladium
bacterial community
Microbial community
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Summary:BACKGROUND Bio‐recovery of metals from dilute industrial waste using bacteria is a promising alternative to primary raw material resources. Therefore, the search for and identification of palladium resistant bacteria with the ability to remove that metal from solutions is very important. The main goal of this study was to find a palladium(II) resistant bacterial community able to bio‐recover this metal from solution. RESULTS A palladium(II) resistant bacterial community able to precipitate that metal from the growth medium was obtained from a sludge sample from a municipal waste water treatment plant. This community was able to remove 60% of palladium(II) from an aqueous solution containing 18 mg L‐1 of Pd(II) and 43% in the presence of 26 mg L‐1 Pd(II) plus sulphate. TEM‐EDS analysis showed the presence of nanosized palladium deposits in the surface of cells. Phylogenetic analysis of the 16S rRNA gene showed that this community was mainly composed of bacteria closely related to several Clostridium species. However, bacteria affiliated to genera Bacteroides and Citrobacter were also present in the community. CONCLUSION The current study for the first time reports the bio‐recovery of Pd(II) as nanoparticles by a bacterial consortium, and is a relevant demonstration of the biotechnological potentialities of this community. © 2013 Society of Chemical Industry
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ISSN:0268-2575
1097-4660
DOI:10.1002/jctb.4064