HOME >> BIOLOGY >> NEWS
Unique two-part macroemulsion offers new approach to cleaning up contaminated aquifers

taminate hundreds of thousands of gallons of groundwater," Pennell noted.

Established remediation techniques (pump and treat) often rely on pumping large amounts of contaminated water out of the ground, flushing the pollutants with it. However, these techniques require large volumes of water and may need to be operated for many years. The cost of treating the contaminated water and the time required make this approach very expensive -- and serves only to contain the contaminated groundwater.

The approach developed by the Georgia Tech team could allow remediation engineers to directly address pollution mass removal, with recovery rates exceeding 90 percent.

"Our approach is to aggressively treat the source zone where the actual spill occurred and remove the compound, then separate and treat or recycle it above ground," Pennell explained. "We are trying to remove the long-term source of groundwater contamination in a manner that will produce the most results for the least cost. It's generally not economically feasible to treat the entire aquifer."

One issue that all such solvent remediation efforts must address is containing the problem. Because these chlorinated compounds are heavier than water, removal efforts can inadvertently drive them deeper into the ground if underground water supplies lack natural boundaries such as impermeable clay or bedrock.

To keep the dense nonaqueous phase liquids (DNAPL) from flowing deeper into the earth, engineers have injected alcohols such as n-butanol into the pollution mass to lower its density. They have also injected surfactant chemicals food or pharmaceutical quality agents similar to those used in whipped toppings and shampoos which reduce the interfacial tension to separate the solvent from soil particles.

The patent-pending technique developed by Pennell and collaborators C. Andrew Ramsburg, Tohren C.G. Kibbey and Kim F. Hayes combines both approaches, making the
'"/>

Contact: John Toon
john.toon@edi.gatech.edu
404-894-6986
Georgia Institute of Technology Research News
17-Sep-2003


Page: 1 2 3

Related biology news :

1. Unique partnership between UH, FDA opens path for scientific exchange
2. Unique fleet of underwater vehicles to gather elusive environmental data
3. Unique feeding behavior discovered for snakes
4. Unique population of muscle stem cells found in mice
5. Unique social system found in famous Tsavo lions
6. Unique national park for orchids to be declared in Africa
7. Unique genetic alteration in presenilin 1 gene predisposes some Caribbean Hispanics to early-onset Alzheimers disease
8. Unique UNC study confirms suspected worldwide epidemic of childhood obesity
9. Scientists find just how discriminating a worm can be: Unique system of overlapping odor sensors discovered
10. Unique study reveals new details on how genes are transcribed
11. Unique international conference to focus on effectiveness, safety of medicinal herbs

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


(Date:2/8/2017)... Report Highlights The global biosurgery market should ... 2016 at a compound annual growth rate (CAGR) of ... An overview of the global market for biosurgery. - ... and 2016, and projections of compound annual growth rates ... the basis of product type, source, application, and region. ...
(Date:2/6/2017)... DENVER , Feb. 6, 2017 ... national security are driving border authorities to continue ... Acuity reports there are 2143 Automated Border Control ... Kiosks currently deployed at more than 163 ports ... between 2013 to 2016 achieving a combined CAGR ...
(Date:2/2/2017)... YORK , Feb. 2, 2017  EyeLock LLC, ... released a new white paper " What You Should ... The problem of ensuring user authenticity is a growing ... the authentication of users. However, traditional authentication schemes such ... Biometric authentication offers an elegant solution ...
Breaking Biology News(10 mins):
(Date:2/21/2017)... FRANCISCO , Feb. 21, 2017   Invitae ... genetic information companies, today announced that members of the ... Company 37th Annual Health Care Conference on Monday, March ... p.m. Pacific in Boston, Massachusetts . ... presentation may be accessed by visiting the investors section ...
(Date:2/20/2017)... , Feb. 20, 2017 /PRNewswire/ - BioAmber Inc. (NYSE: BIOA ... President and CEO and Fabrice Orecchioni, the company,s COO, has been ... COO over the past four years, Fabrice has overseen the construction, ... and the management of the Mitsui JV.  Fabrice has ... the proposed China JV. ...
(Date:2/20/2017)... ... 20, 2017 , ... Salford-based Mettler Toledo Safeline, which employs ... processing and packaging industries, was runner-up for the Environmental Achievement Award, sponsored by ... or taken the most innovative steps to improve its environmental performance. , ...
(Date:2/20/2017)... ... February 20, 2017 , ... ... chest wall collapses in pre-term infants with respiratory distress, and assist surgeons ... $600,000 in funding through the ninth round of the University City Science ...
Breaking Biology Technology:
Cached News: