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Biosorption of copper from aqueous environments by Micrococcus luteus in cell suspension and when encapsulated

Title data

Letnik, Ilya ; Avrahami, Ron ; Port, Rafi ; Greiner, Andreas ; Zussman, Eyal ; Rokem, J. Stefan ; Greenblatt, Charles:
Biosorption of copper from aqueous environments by Micrococcus luteus in cell suspension and when encapsulated.
In: International Biodeterioration & Biodegradation. Vol. 116 (2017) . - pp. 64-72.
ISSN 0964-8305
DOI: https://doi.org/10.1016/j.ibiod.2016.09.029

Abstract in another language

The ability to sequester or tolerate copper has been described for a number of bacteria. It was shown that Micrococcus luteus tolerates copper, and possible mechanisms of uptake for this bacterium have been proposed. Using a count live of M. luteus (CFU), 10% survived a copper concentration of 370 ppm. Maximum sorption capacity was 59 mg of Cu2+/g of dry cells at pH 6. Several proteins of M. luteus with copper affinity were identified by enrichment on a metal-chelating resin followed by LC-MS/MS to identify the metallome. Use of SEM/EDX showed how copper concentrated on the bacterial surface, whereas TEM indicated that copper was found also inside the cells. The enhanced capability of M. luteus to bind copper was tested using three configurations: free cells on an agar surface and cells encapsulated in alginate or in electrospun polymer composites. The latter showed the highest capability to bind copper (∼76 mg Cu2+/g dry cells). Such polymer composites may potentially be used in various water-based applications such as treatment of wastewater with a high concentration of copper or other heavy metals.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Faculties
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 15 Aug 2018 13:52
Last Modified: 15 Aug 2018 13:52
URI: https://eref.uni-bayreuth.de/id/eprint/45478