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:
(Date:7/27/2014)... have found that targeting a molecule in blood vessels ... research published in Nature today (Sunday)., The ... University of London, have found that a molecule, called ... itself after chemotherapy or radiotherapy, which kill cancer cells ... blood vessels that grew in melanoma or lung cancer ...
(Date:7/25/2014)... on the land now called California, and many of ... plants they used for food, fuel, tools, and ritual. ... habitat and natural resources. , Frank Lake, an ecologist ... lead a field trip to the Stone ... America,s 99th Annual Meeting, in Sacramento, Cal. this August. ...
(Date:7/25/2014)... published online in the International Journal of Cancer ... preventing cervical cancer based on findings showing successful reduction ... a discrete population of cells in the cervix. ... at squamocolumnar junction cells, or SCJ cells. These cells ... as the origins of cervical cancer. A research team ...
Breaking Biology News(10 mins):New drug target can break down cancer's barrier against treatment 2Fire ecology manipulation by California native cultures 2Fire ecology manipulation by California native cultures 3Clearing cells to prevent cervical cancer 2
(Date:7/28/2014)... July 28, 2014 According to ... Market Research "Regenerative Medicine (Bone and Joint) Market ... Tissue Engineering; By Applications - Bone Graft Substitutes, ... - Global Industry Analysis, Size, Share, Growth, Trends ... medicine (bone and joint) market was valued at ...
(Date:7/28/2014)... , July 28, 2014  David Hardison, Ph.D., ... by Deloitte , has been elected chairman of ... Consortium, a non-profit working to establish common protocols ... as it relates to electronic health records. ... mission of collaborating with organizations across the research ...
(Date:7/28/2014)... The global market for biotechnology is ... to a new study by Grand View Research, Inc. ... effective vaccines and drugs in an attempt to improve ... expected to drive market demand over the next six ... via the use of genetically engineered seeds is expected ...
(Date:7/26/2014)... 26, 2014 Canada Endoscopy Visualization ... data on the Canada Endoscopy Visualization Systems market. ... dollars, volume (in units) and average prices (in ... Visualization Systems, Mid-Range Endoscopy Visualization Systems and Low-End ... http://www.marketresearchreports.biz/analysis/213254 . , The report also provides ...
Breaking Biology Technology:Regenerative Medicine Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2013 - 2019 2Regenerative Medicine Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2013 - 2019 3Regenerative Medicine Market: Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2013 - 2019 4ConvergeHEALTH by Deloitte's David Hardison Named Chairman of the Clinical Data Interchange Standards Consortium 2ConvergeHEALTH by Deloitte's David Hardison Named Chairman of the Clinical Data Interchange Standards Consortium 3Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 2Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 3Global Biotechnology Market Worth $604.40 Billion by 2020: Grand View Research, Inc 4Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 2Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 3Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 4Canada Endoscopy Visualization Systems Market Outlook to 2020: MarketResearchReports.Biz 5
Cached News: