HOME >> BIOLOGY >> NEWS
Subsurface bacteria release phosphate to convert uranium contamination to immobile form

eralized by the phosphate released by the bacteria." The bacteria's role is crucial in this process because uranium cannot dissociate the organo-phosphate compound chemically, Taillefert explained. So uranium in the presence of organo-phosphate alone does not result in significant uranium precipitation.

Sobecky and her Ph.D. student Robert Martinez are conducting the microbiological and physiological component of the research, while Taillefert and Beazley study the uranium chemistry and analyze distribution of different forms of uranium during incubation in the lab.

"The devil's in the details with the chemistry of uranium: There are numerous forms of uranium in the environment, which are all influenced by the natural properties of soils and groundwater," Taillefert said.

Sobecky added, "What we're doing now is optimizing the assay conditions and the techniques to analyze the distribution of uranium species in the lab."

Traditionally, DOE has funded research investigating the chemical reduction of uranium contamination. But there are two approaches to immobilizing uranium. One strategy reduces uranium (VI) to uranium (IV), which is, in principle, immobile. But the uranium can re-oxidize even with traces of oxygen from rainwater seeping into the groundwater. The Georgia Tech approach biomineralizes uranium (VI) into an insoluble form of uranium via phosphate precipitation.

As they work toward a bioremediation strategy that will work in the field, researchers must design a mechanism to deal with competing organisms in the soil that might sequester the free phosphate, Sobecky noted. Though their current grant does not cover the cost of a field study, researchers hope to obtain funds in the future to test their strategy at Oak Ridge and potentially other DOE sites. Uranium contamination is a concern at DOE sites because it can migrate to groundwater in surrounding areas, Taillefert noted.

"At this point, we know the organisms we'
'"/>

Contact: Jane Sanders
jane.sanders@edi.gatech.edu
404-894-2214
Georgia Institute of Technology Research News
30-Mar-2006


Page: 1 2 3

Related biology news :

1. In limiting life span, study finds booming bacteria innocent
2. Cornell scientists link E. coli bacteria to Crohns disease
3. Pets could be source of multiresistant bacteria infections in humans, MU researchers investigate
4. Researchers watch antibiotics, bacteria meet at atomic level
5. A new plant-bacterial symbiotic mechanism promising
6. Piecing together the cyanobacteria puzzle
7. New research shows vaginal bacteria vary among healthy women, need customized treatment
8. New way to target and kill antibiotic-resistant bacteria found
9. UCF professor finds bacterial pathogen may be key to understanding cancer development
10. Helping chlorine-eating bacteria clean up toxic waste
11. Researchers discover acquired DNA key to certain bacterial infection

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/21/2019)... ... 2019 , ... The ASGCT Clinical Trials Finder is a customizable ... United States. Data curated daily from ClinicalTrials.gov ensures the most up-to-date and applicable listings ... to assist in the development of the ASGCT Clinical Trials Finder reviewed ...
(Date:5/16/2019)... ... ... In a FDA-contracted Standard Coordinating Body Workshop held at the ... Asymmetrex founder and director James L. Sherley, M.D., Ph.D. predicted a sea ... cells. Many of the gathered participants dismissed this idea. Few argued against ...
(Date:5/14/2019)... ... May 14, 2019 , ... IMMUNE 3D®, ... beyond immuno-oncology into areas of autoimmunity, fibrosis and skin immunology. In addition, the ... lines for IO discovery efforts. , IMMUNE 3D®’s proprietary platform aims to ...
Breaking Biology News(10 mins):
(Date:5/2/2019)... ... 30, 2019 , ... The centuries old practice of brewing beer thrives today ... breweries, and even home brewing clubs scattered across the nation. , But proper ... mastered can produce a superb product. Students at South Dakota School of Mines ...
(Date:5/2/2019)... , ... May 02, 2019 , ... ... clinic in the greater Boston area. Gone are the days of painful hair ... iX Robotic Hair Restoration System is the only robotic intelligent solution to offer ...
(Date:4/18/2019)... ... April 18, 2019 , ... Taking a ... includes a chemical engineer at Worcester Polytechnic Institute (WPI) has developed a novel ... possible to manufacture isobutanol and other biofuels more economically. , Isobutanol, like ethanol, ...
(Date:4/15/2019)... ... 2019 , ... Sirrus, Inc., a developer of novel electron-deficient ... to increase production of methylene malonate monomers and oligomers. , The expanded bench ... production facility, which is scheduled to break ground in 2019. “The expanded facility ...
Breaking Biology Technology:
Cached News: