The Latest Biology News And Medical NewsBiology News 2Health News 2Biology News 3Health News 3
HOME >> BIOLOGY >> NEWS
Researchers Use Hydrated Lime To Reduce Toxic Selenium Emissions

COLUMBUS, Ohio -- Researchers at Ohio State University have found a way to use hydrated lime to reduce the amount of selenium emitted by fossil-fuel combusters and incinerators.

Selenium is one of the most volatile and toxic byproducts produced by coal-fired power plants. An essential trace element for humans and other animals, large quantities of selenium can cause infertility and damage to the liver, kidneys and lungs.

About 2,500 tons of selenium are discharged into the atmosphere each year in the United States alone. Regulations being proposed by the Environmental Protection Agency will seek to control emissions of selenium and other metals found in fly ash and flue gas, said Liang-Shih Fan, professor and chair of chemical engineering at Ohio State.

Fan and Suhas Mahuli, a post-doctoral researcher in chemical engineering, have studied ways to capture selenium from flue gas before it escapes into the atmosphere. The researchers found that hydrated lime, which has been shown effective in controllingsulfur dioxide emissions in flue gas, can also be used to reduce selenium.

The fine, powdery lime is injected into the plant's boiler chambers through nozzles or injectors that can be retro-fitted to existing plants. The lime particles capture selenium and sulfur dioxide. As the flue gas moves upward, an electrostatic precipitator removes the particles by electrical charging.

The method, called dry sorbent injection, has been studied for several years as a way to remove sulfur dioxide from flue gas. But this is the first time studies have shown that hydrated lime chemically removes selenium by means of an irreversible chemical reaction.

"The hydrated lime -- which is calcium-based -- forms with the selenium to create calcium selenite, the first time this reaction has been documented," Fan said. "The compound is then captured by the dry sorbent and can be disposed of with the fly ash."

The researchers found that the hydrated lime was mo
'"/>

Contact: Liang-Shih Fan
Fan.1@osu.edu
614-292-7907
Ohio State University
11-Jul-1996


Page: 1 2

Related biology news :

1. Researchers determine genetic cause of Timothy syndrome
2. Researchers find color sensitive atomic switch in bacteria
3. Researchers identify protein promoting vascular tumor growth
4. Researchers devise potent new tools to curb ivory poaching
5. Researchers create nanotubes that change colors, form nanocarpet and kill bacteria
6. Researchers ID chlorophyll-regulating gene
7. Researchers develop fast track way to discover how cells are regulated
8. Researchers identify distinctive signature for metastatic prostate cancer
9. Researchers report new gene test for isolated cleft lip and palate
10. Researchers discover why mutant gene causes colon cancer
11. Researchers identify the genomes controlling elements
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Researchers Use Hydrated Lime Reduce Toxic Selenium Emissions

(Date:11/20/2008)...GTON, DC Although Americans are becoming increasi...y household products like bisphenol A in some baby...ly connect typical household products with persona...ects, according to research from the December issu... , "People more readily equate pollution with la...
(Date:11/20/2008)...CITY, Calif., Nov. 19 DigitalPerso...tions, today announced DigitalPersona,Personal 4....dividuals, family,members and business users. Dig...otection suite to use biometrics, letting people u...- including email, banking, shopping, and other We...
(Date:11/20/2008)...URGHResearch from the University of Pittsburgh pub...finally provide evidence of the first stages of th... that males and females developed from hermaphrodi...ly understood because the majority of animal speci...parate-sex state too long ago for scientists to ob...
(Date:11/20/2008)...dical Systems Inc., (NMS), an Austin-based startup...ity of Texas Health Science Center at Houston (UTH...cancer agents and other medications, has received ...ugh the Texas Emerging Technology Fund (ETF). , ... awards, which were announced by Texas Gov. Rick P...
Breaking Biology News(10 mins):Pollution at home lurks unrecognized, instead attributed to large-scale environmental disasters 2DigitalPersona Places Identity Protection at People's Fingertips 2DigitalPersona Places Identity Protection at People's Fingertips 3Two from one: Pitt research maps out evolution of genders from hermaphroditic ancestors 2Texas invests record $3.5 million in startup cofounded by UT's Mauro Ferrari 2HealthCoach Welcomes James Herrera as Vice President of Consulting 5474 1HealthCoach Welcomes James Herrera as Vice President of Consulting 5474 2CTDC Appoints Chief Scientist 5471 1CTDC Appoints Chief Scientist 5471 2CTDC Appoints Chief Scientist 5471 3Penn Treaty Urges Americans To Plan for Their Future During Long Term Care Awareness Week 5468 1Penn Treaty Urges Americans To Plan for Their Future During Long Term Care Awareness Week 5468 2Penn Treaty Urges Americans To Plan for Their Future During Long Term Care Awareness Week 5468 3ADVENTRX Pharmaceuticals to Present at the 13th Annual BIO Europe Partnering Conference 5465 1ADVENTRX Pharmaceuticals to Present at the 13th Annual BIO Europe Partnering Conference 5465 2
Other News:
...Spanish.In the primordial soup that produced life ...ed to produce the first nucleic acid chains, which...ccording to one of the more accepted theories, the... molecule that is practically identical to DNA and...
... Geochemical Society of America has awarded the 'T... the Royal Netherlands Institute for Sea Research ... international accolade in the field of organic ge... during the 22nd International Meeting on Organic ...
... in a receptor called CD32 influence the response ...ng online on September 15 in advance of print publ...linical Investigation, Adam Boruchov and colleague...ect the contributions of CD32 isoforms in human de...
...g for eye disease is becoming a reality, thanks to...gan Kellogg Eye Center. Scientists have created a ...ill help physicians hone their diagnoses for patie...igmentosa (RP). The screening technique has proven...
Life's origins were easier than was thought 2Marine researcher wins prestigious chemistry prize 2Genetic testing helps physicians zero in on eye disease 2Genetic testing helps physicians zero in on eye disease 3
Orlando, Fla. Use of portable defibrillators by non-emergency responders on victims of cardiac arrest doubled during a four-year period in Seattle and King County, Washington. Survival rates were si
... by Emory researchers at the American Heart Associ...ns today address angina related quality of life in...cutaneous coronary intervention (PCI), medical pro...to reduce the amount of narrowing in a coronary ar...
Under a new $4.7 million grant from the National Eye Institute, researchers from Case Western Reserve University School of Medicine and University Hospitals of Cleveland hope to develop in five years
WASHINGTON---Recognizing diabetes as the leading cause of adult blindness, U.S. Rep. Jim Cooper introduced legislation today to expand patient access to new eye screening technology that helps curb th
health news:Public access defibrillator use increasing 2health news:Emory data suggest diabetics have worsening symptoms prior to acute cardiac event 2health news:Researchers to develop new drug to treat myasthenia gravis 2health news:Researchers to develop new drug to treat myasthenia gravis 3health news:Diabetic eye screening bill based on Vanderbilt model 2
...on the experience of Air Force personnel at an exp...pitals should be prepared with the proper staff, t...red children who require medical care, according t...ediatrics & Adolescent Medicine, one of the JAMA/A...
... -- Dana-Farber Cancer Institute researchers and t...rror so scarce it can't be detected with some stan...the loss of effectiveness of front-line drugs agai...ed by Pasi Jnne, MD, PhD, found that many non-smal...
...bel:...Today the U.S. Food and Drug Administration...eart for patients with advanced heart failure in b...s intended for patients who are not eligible for a...t the device is only a month. Heart failure is a ...
..., Calif., Sept. 5, 2006 -- A type of protein cruci...t appears to be equally important for the formatio...at UC Irvine. The findings could lead to a better ...cline associated with normal aging and diseases su...
health news:Injured, ill children treated at U.S. military hospital in Iraq 2health news:Study uncovers mechanism of drug resistance in form of lung cancer 2health news:Study uncovers mechanism of drug resistance in form of lung cancer 3health news:NHLBI and NIH statements on totally implanted permanent artificial heart 2health news:Proteins necessary for brain development found to be critical for long-term memory 2