Navigation Links
Biological selenium removal: The solution to pollution?
Date:9/15/2008

MADISON, WI, AUGUST 25, 2008 Selenium has been referred to as an "essential toxin" due to the fact that it shows only a marginal line between the nutritious requirement and toxic effects upon exposure. The steep dose response curve due to bioaccumulation effects have lead to the characterization of selenium as a "time bomb" that can be fused by exceeding a narrow threshold concentration in ecosystems through anthropogenic activities. Ironically, an estimated 0.5 to 1 billion people worldwide suffer from selenium deficiency, whereas areas of toxicity can be separated from selenium deficient areas by only 20 km.

The microbiological treatment of selenium - so called "dissimilatory metal reduction" - could supersede this problem, as selenium-reducing microorganisms are highly selective for selenate, reducing it to insoluble, less-toxic elemental selenium that can potentially be recovered from the process.

A study funded by the European Union, published in the September-October issue of the Journal of Environmental Quality, demonstrates that the biological treatment is indeed efficient for selenate reduction, and substantial amounts of selenate are converted to methylated selenium species or nano-sized elemental selenium particles. The emission of nano-sized selenium particles is problematic, as these can become bioavailable by direct assimilation or reoxidize to selenite and selenate. Dimethlyselenide and dimethyldiselenide, two species with unknown ecotoxicological long-term effects, contributed substantially to selenium dissolved in the effluent. Their formation was induced by minor temperature changes during biological reduction, thus a careful process control might drastically increase removal success of existing biotreatment systems for selenium and is a prerequisite for successful removal in full scale applications.

Consequently, remediative systems aiming at minimizing ecotoxicological risks on the one hand and selenium re
'/>"/>

Contact: Sara Uttech
suttech@soils.org
608-268-4948
Soil Science Society of America
Source:Eurekalert

Page: 1 2

Related biology news :

1. Mate selection more biologically determined in some human populations
2. Interdisciplinary volume on biological rhythms serves as both primer and in-depth resource
3. Biological invasions increasing due to freshwater impoundments, says CU-Boulder study
4. Study shows more genes are controlled by biological clocks
5. Light receptors in eye play key role in setting biological clock, study shows
6. Francisella tularensis: Stopping a biological weapon
7. Tips on how to build a better home for biological parts
8. Genomics of large marine animals showcased in the biological bulletin
9. Securing the future of Europes biological data resources
10. Religion and the narrative of biological science
11. AIBS honors outstanding contributions to the biological sciences
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/22/2014)... 2014  Leading identity analyst firm Acuity Market Intelligence ... world,s population will have a chip-based National eID card, ... . Asia , with its vast ... more than 60% of all National eID cards issued ... "The Global National eID Industry Report: 2014 ...
(Date:10/18/2014)... Berlin, 19th October 2014 Psychological stress and stress-related ... for aging-related diseases, but the molecular mechanisms ... mechanisms may contribute to the development of ... treatments for these devastating diseases. This work ... Neuropsychopharmacology congress in Berlin., Now an international ...
(Date:10/17/2014)... regarding Ebola is critical and pertinent for practicing physicians ... outbreak and epidemic. The Journal, Disaster Medicine and ... Ebola Virus and Public Health, to surround the public, ... critical societal moment. , On October 17, the ... . The primer was prepared by Dr. Eric Toner, ...
Breaking Biology News(10 mins):Half the World's Population Will Have Chip-Based National Electronic Identity (eID) Cards by 2018 2Researchers find why depression and aging linked to increased disease risk 2
... that has shown promise in skin disease and hemophilia might ... a new study by researchers at Stanford University School of ... in the Proceedings of the National Academy of Sciences the ... introduce a healthy copy of the gene dystrophin into mice ...
... the process that controls plant growth may help explain ... international team of scientists. , ,Researchers from Purdue ... the first time that proteins similar to multi-drug resistant ... cells, said Purdue plant cell biologist Angus Murphy. Because ...
... Although researchers over recent years have established a foothold ... by which it might contribute to aging and lifespan ... researchers studying p53 function in fruit flies show new ... a guardian against tumor formation, normal levels of p53 ...
Cached Biology News:Gene therapy for muscular dystrophy fixes frail muscle cells in animal model, Stanford study finds 2Gene therapy for muscular dystrophy fixes frail muscle cells in animal model, Stanford study finds 3Plant gene related to cancer treatment may foster new oncology drugs 2Plant gene related to cancer treatment may foster new oncology drugs 3New clues to the dark side of a key anti-tumor guardian 2
(Date:10/20/2014)... Md. , Oct. 20, 2014  GenVec, Inc. (NASDAQ: ... Zola P. Horovitz , Ph.D., from its board of directors ... board in August 2003, and served as its chairman from ... served on the Nominating and Corporate Governance and Audit Committees ... for more than a decade of dedicated service to GenVec, ...
(Date:10/20/2014)... N.J. (PRWEB) October 20, 2014 ... the Sidney Kimmel Cancer Center at Thomas Jefferson ... , Through the Strategic Alliance Partnership program, ... OncLive will collaborate to raise awareness of the ... treatment, and other projects. Clinicians and other health ...
(Date:10/20/2014)... 2014 Local veterinary surgeon, Dr. Tim ... study of donor stem cells for dogs with osteoarthritis. ... and has performed clinical stem cell therapy for 7 ... determine if a single injection of donor stem cells ... reduce pain and inflammation in the treated joints. ...
(Date:10/19/2014)... OCTOBER 20-22, 2014: The ... ABIM will take place at the Congress ... 2014 is now available at http://www.abim.ch ... and organizations from all over the globe ... the latest products and developments on the ...
Breaking Biology Technology:Zola P. Horovitz To Retire From GenVec Board 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3Cascade Veterinary Referral Center Seeks Candidates for an Investigational Study of Stem Cells for Dogs with Arthritis 2
... GAITHERSBURG, Md., Aug. 25 GenVec, Inc. (Nasdaq: ... 2 Small Business Innovation and Research (SBIR) grant from the National ... of Health (NIH) to support the development of GenVec,s vector production ... 2 0081205/DC50112LOGO ) , , ...
... WAYNE, Pa., Aug. 24 Encorium Group, Inc. (Nasdaq: ... (CRO) that provides design, development, and management capabilities for clinical ... pharmaceutical companies, today announced its financial results for the second ... As previously announced, on July 16, 2009 the Company sold ...
... , JACKSONVILLE, Fla., Aug. 24 In response ... to deploy social networking tools for their members or constituents, ... the Engageon Association Builder (EAB). The first launch was developed ... at www . lipid.org . ...
Cached Biology Technology:GenVec Receives an Approximately $2.5 Million Grant to Support Novel Cell Line Development 2Encorium Reports Second Quarter 2009 Financial Results 2Encorium Reports Second Quarter 2009 Financial Results 3Encorium Reports Second Quarter 2009 Financial Results 4Encorium Reports Second Quarter 2009 Financial Results 5Encorium Reports Second Quarter 2009 Financial Results 6Encorium Reports Second Quarter 2009 Financial Results 7Encorium Reports Second Quarter 2009 Financial Results 8Encorium Reports Second Quarter 2009 Financial Results 9Engageon Releases First Peer-to-Peer Medical Association Social Network 2
Mouse TREM-2 Affinity Purified Polyclonal Ab...
Human BMP 2 Construction Kit provides antigen affinity purified polyclonal capture and tracer antibodies, and antigen standard for development of approximately ten microplate assays....
...
... pAcGHLT-A,B,C Baculovirus ... Set,pAcGHLT-XylE Baculovirus ... Powder,Thrombin Dilution ... Cocktail,Insect Cell ...
Biology Products: