HOME >> BIOLOGY >> NEWS
New pollutant cleanup technique puzzles, pleases chemists

(CRAEMS) Center at Johns Hopkins, which is dedicated to finding ways to deal with the environmental effects of organohalides. "These compounds play many important and beneficial roles in the chemical and pharmaceutical industries, so they're not going away soon, and it's important that we find ways to minimize their environmental effects," he said.

According to Meyer, scientists have known for decades that hemes, a naturally occurring group of compounds that contain iron atoms, can break up organohalides. The most well-known heme is hemoglobin, a compound in red blood cells that carries oxygen.

"There's a lot of speculation that hemes in proteins are what cells use to defend themselves from organohalides," Meyer explained. "We can buy hemes we don't have to extract them from protein or anything but when you remove them from their naturally occurring environment, you tend to oxidize them."

In their oxidized state, hemes are no longer useful for breaking down organohalides. Hemes can be re-activated using chemical or electrochemical techniques, but Obare wanted to try using a practical, easily available energy source to power the re-activation: sunlight. She decided to try to take advantage of titanium dioxide's abilities as a photocatalyst, a substance that promotes chemical reactions in other nearby materials when exposed to light.

"I anchored hemin on porous thin films of nanocrystalline titanium dioxide, and when I exposed the system to light, the hemin was activated to a reduced state where it reacted rapidly with organohalides, producing much better results than I expected," Obare explained. "I've even been able to recycle and reactivate the thin films for further organohalide degradation."

Meyer noted that there's still a lot of development work to be done, not the least of which is figuring out exactly how the chemistry of the new system works. But he speculated that scientists might someday be able to insert a si
'"/>

Contact: Phil Sneiderman
prs@jhu.edu
410-516-7160
Johns Hopkins University
9-Sep-2003


Page: 1 2 3

Related biology news :

1. New tool predicts how long pollutants will stay in soil
2. New space-borne instrument to track greenhouse gases, ozone destroyers, and other pollutants
3. Film found on windows after 9/11 reveals higher level of pollutants
4. New study begins to unravel fate of toxic pollutants harbored in Arctic waters
5. Novel bacterium detoxifies chlorinated pollutants
6. Mediterranean fishery recovers, thanks to manmade pollutants
7. Research shows how pollutants affect tree growth
8. Urban air pollution linked to birth defects for first time; UCLA research links two pollutants to increased risk of heart defects
9. Wind-borne pollutants may travel thousands of miles
10. Acid-rain component may be more potent pollutant than previously thought, UB chemists discover
11. Vapor-recovery system captures and recycles air pollutants

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


(Date:4/3/2017)...  Data captured by IsoCode, IsoPlexis Corporation,s ... statistically significant association between the potency of ... objective response of cancer patients post-treatment. The ... cancer patients will respond to CAR-T cell ... to improve both pre-infusion potency testing and cell ...
(Date:3/29/2017)... March 29, 2017  higi, the health IT company ... North America , today announced a Series ... acquisition of EveryMove. The new investment and acquisition accelerates ... tools to transform population health activities through the collection ... higi collects and secures data today on ...
(Date:3/24/2017)... Mar 24, 2017 Research and Markets has ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 15.1% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
Breaking Biology News(10 mins):
(Date:5/18/2017)... ... May 17, 2017 , ... ... today that their Chief Executive Officer, Maik Jornitz, was recognized as a Top ... Power List celebrates 100 individuals “involved in bettering the pharma industry and bringing ...
(Date:5/18/2017)... (PRWEB) , ... May 18, 2017 , ... When James Sherley, was notified earlier this ... Most Valuable Brands for the Year 2017 by The Silicon Review , he was ... making good progress increasing Asymmetrex’s value, but this recognition by Silicon Valley was particularly meaningful. ...
(Date:5/16/2017)... ... May 16, 2017 , ... ... Hi-C metagenomic deconvolution service. ProxiMeta enables researchers to obtain complete, distinct genomes ... insights at lower cost. , “We’re very excited about the commercial launch ...
(Date:5/16/2017)... CA (PRWEB) , ... May 16, 2017 , ... ... medicine technology and cancer diagnostics, has released its ClearID Lung Cancer blood test. ... in lung cancer, this new test is designed to quickly and accurately identify ...
Breaking Biology Technology:
Cached News: