Format

Send to

Choose Destination
Biotechnol Bioeng. 1983 Jul;25(7):1725-35.

Uranium binding by emulsan and emulsanosols.

Author information

1
Department of Microbiology, George S. Wise Center of Life Sciences, Tel Aviv University, Ramat Aviv, Israel.

Abstract

Emulsan, the extracellular bioemulsifier of Acinetobacter RAG-1, bound up to 0.9 microm of uranium per 1 mg emulsan. The dissociation constant for the emulsan-uranium complex, K(app) (I) was 1.2 x 10(-4)M. Much larger amounts of uranium were bound to emulsan when the biopolymer occurred on hexadecane-water interfaces. Under these conditions, more than 3.5 microm uranium were bound per 1 mg emulsan and the dissociation constant K(app) (II) was 5.1 x 10(-5)M. At pH 2, more than 90% of the uranium bound to emulsan on the hexadecane-water interface was desorbed, while less than 10% bioemulsifier was released from the interface. The different binding parameters of emulsan when free in solution and while adsorbed onto the hexadecane water interface are discussed in view of potential applications and as a model system for studying the properties of an extracellular amphipathic polymer bound to a hydrophobic surface.

PMID:
18551477
DOI:
10.1002/bit.260250704

LinkOut - more resources

Full Text Sources

Other Literature Sources

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center