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:6/17/2015)... Deutschland und GERMANTOWN, Maryland , June ... ®   Produktlinie mit DNA-Tests verbessert den ... (NASDAQ: QGEN ; Frankfurt Prime Standard: QIA) hat ... STR-Testkits der Produktlinie Investigator ® ... Markt eingeführt. Die neuen Kits zur Erstellung genetischer Fingerabdrücke ...
(Date:6/16/2015)... , June 16, 2015  With the increasing ... security remains a top concern. The recent compromise of ... the need for strong authentication within government agencies. ... a biometric one-time password (OTP) authenticator, has been submitted ... (FIPS) 140-2 Level 3 validation for tamper proofing. ...
(Date:6/15/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces that its leading payment security technology, the ... Experience! @ NYC June 18th. Digital Experience! @ ... in technology to over 300 of the top media covering ... Pavilion in New York City from ...
Breaking Biology News(10 mins):QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 2QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 3QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 4QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 5QIAGEN bringt in den USA neue Kits für die forensische DNA-Analyse auf den Markt 6Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 2Government Ready Biometric Security Approaching as HYPR Corp. Files FIPS 140-2 Level 3 Validation for Its Proprietary Biometric Token 3Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 2Wocket Smart Wallet Exhibiting at Pepcom Digital Experience! @ NYC June 18th 3
(Date:7/1/2015)... 1, 2015   Decision Resources Group ... of Otezla are its oral administration, alternative mechanism ... by surveyed rheumatologists. Otezla was the first oral ... of active psoriatic arthritis in the ... care includes conventional oral treatments including disease-modifying antirheumatic ...
(Date:7/1/2015)... July 1, 2015  Axovant Sciences Ltd. (NYSE: ... the treatment of dementia, today announced that the ... 22 at 5:45 p.m. EDT following its presentation ... International Conference 2015 (AAIC). The ... , Dr. Lawrence Friedhoff , Chief Development ...
(Date:7/1/2015)... ... July 01, 2015 , ... Apex Therapeutics announced today that company ... Philadelphia, PA. , The presentation took place on Tuesday, June 16 and ... the development of APX3330 for the treatment of pancreatic cancer. A copy of ...
(Date:6/30/2015)... ... June 30, 2015 , ... Students and faculty from ... first half of “Integrative Biotechnology,” an applied biotechnology course team-taught by faculty members ... course combines students from both universities and is taught on both continents. , ...
Breaking Biology Technology:Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 2Surveyed Rheumatologists Report That Otezla's Oral Administration is its Single Greatest Advantage Over Currently Available Treatment Options 3Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 2Axovant Sciences To Host Investor Briefing And Live Webcast During AAIC 2015 Meeting 3Apex Therapeutics Presented Company Overview at This Year’s BIO International Convention in Philadelphia, PA 2Rivier University and Beijing City University Academic and Cultural Exchanges Begin 2
Cached News: