Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Geophysicist develops method for finding underground contaminants

03.12.2002


When a property is suspected of having contaminated soil or groundwater, it is usually a lengthy and costly process to confirm the presence of pollutants and to delineate the extent of the contamination. Soon that process may be simplified considerably.



University of Rhode Island geophysicist Reinhard Frohlich, an associate professor of geosciences, has devised a cost-effective, new method for finding underground contaminants that will reduce drilling and digging beneath the surface. By inserting two metal spikes in the ground at various distances and connecting them to an electric current, Frohlich can measure the voltage between the spikes and determine the resistivity of the soil, which tells him if the soil is polluted.

"My initial objective was to do an experiment at the surface that would explain what was going on beneath the surface," said Frohlich, whose research was funded by a $55,000 grant from the U.S. Environmental Protection Agency.


Resistivity measurements, which calculate a material’s opposition to the flow of electric current, are widely used to track contaminated salts dissolved in groundwater because they are good conductors of electricity. But Frohlich’s experiments focused on finding organic compounds like toluene, benzene, xylene, ethylbenzene, phenol and other cancer-causing substances that do not conduct electricity.

"Our system seems to work very well on all organic compounds. Resistivity increases significantly in areas where the aquifer is polluted compared to clean areas," he said. "We should be able to use this as the first step in the remediation process because it’s quicker and allows us to drill fewer borings into the aquifer." Frohlich tested his system at the Picillo Pig Farm in West Coventry, a Superfund site where illegal dumping of chemical waste was discovered following an explosion in 1978. The R.I. Department of Environmental Management and the EPA have been monitoring and cleaning the site for more than 20 years.

"The Picillo Farm is a suitable site for our experiments because the results can be compared with the many monitoring wells and other analyses that have been conducted there over the years," Frohlich said. In addition to field tests at the Picillo Farm, Frohlich conducted controlled laboratory tests comparing clean soil with contaminated soil of known composition.

His study will next attempt to quantify the amount of contaminants at a given location. "It’s one thing to identify a clean or contaminated site, but we want to also get a quantitative value for the contaminants," said Frohlich. "That’s something that the EPA would really like to be able to do."

Todd McLeish | EurekAlert!
Further information:
http://www.uri.edu/

More articles from Earth Sciences:

nachricht PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target
22.05.2018 | Mercator Research Institute on Global Commons and Climate Change (MCC) gGmbH

nachricht Monitoring lava lake levels in Congo volcano
16.05.2018 | Seismological Society of America

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

Im Focus: Dozens of binaries from Milky Way's globular clusters could be detectable by LISA

Next-generation gravitational wave detector in space will complement LIGO on Earth

The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...

Im Focus: Entangled atoms shine in unison

A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.

The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

Unique scope of UV LED technologies and applications presented in Berlin: ICULTA-2018

12.04.2018 | Event News

 
Latest News

Designer cells: artificial enzyme can activate a gene switch

22.05.2018 | Life Sciences

PR of MCC: Carbon removal from atmosphere unavoidable for 1.5 degree target

22.05.2018 | Earth Sciences

Achema 2018: New camera system monitors distillation and helps save energy

22.05.2018 | Trade Fair News

VideoLinks
Science & Research
Overview of more VideoLinks >>>