Navigation Links
'Super socks' help stem pollution runoff
Date:7/23/2010

This release is available in Spanish.

Agricultural Research Service (ARS) scientists and their collaborators have improved on an existing method for removing contaminants from storm water runoff. These findings could provide surface waters additional protection against runoff containing pollutants from point sources such as construction sites, storm waters and other urban landscapes.

"Filter socks" containing compost tucked into mesh tubes are used to capture some of the silt, heavy metals, fertilizers and petroleum products washed from compacted surface areas into nearby streams and rivers.

A group of scientists from the ARS Animal and Natural Resources Institute in Beltsville, Md., teamed with researchers from Filtrexx International, which manufactures the socks, to see if adding flocculation agents to the socks improved their performance. The ARS team included agronomist Eton Codling, microbiologist Dan Shelton and soil scientists Yakov Pachepsky and Ali Sadeghi. Their Filtrexx International partners were Britt Faucette and Fatima Cardoso-Gendreau.

Wastewater treatment plants use flocculation agents to help sediments and pollutants form clumps large enough to be filtered out of the water, even when the substances are in a dissolved state. The team added flocculation agents to compost socks and then ran laboratory tests to see how well the socks trapped sediment, coliforms, nitrates, E. coli bacteria, heavy metals and petroleum products in runoff after simulated "rain events."

The scientists found that compost socks alone removed the majority of clay and silt particles that contribute to suspended solids in surface waters. The socks also removed 17 percent of ammonium nitrogen, 75 percent of E. coli bacteria, and from 37 percent to 72 percent of the heavy metals. In addition, runoff levels of diesel fuel dropped 99 percent, levels of motor oil dropped 84 percent, and gasoline levels dropped 43 percent.

However, socks with flocculation agents removed even more of the pollutants from runoff, including 27 percent of the ammonium nitrogen, 99 percent of E. coli bacteria, 99 percent of the motor oil, 54 percent of the gasoline and from 47 percent to 74 percent of the heavy metals.


'/>"/>

Contact: Ann Perry
ann.perry@ars.usda.gov
301-504-1628
United States Department of Agriculture-Research, Education, and Economics
Source:Eurekalert

Related biology news :

1. Toward a new generation of superplastics
2. Supercharged proteins enter biologys forbidden zone
3. WSU researchers use super-high pressures to create super battery
4. Defense-scale supercomputing comes to alternative energy research
5. SuperPower and UH sign high temperature superconducting wire license agreements
6. Common house ants form supercolonies, prosper in urban settings
7. Light activated warhead turns modest molecules into super protein killers
8. Supermarket lighting enhances nutrient level of fresh spinach
9. Low levels of antibiotics cause multidrug resistance in superbugs
10. Zymes LLCs Omega-3 Enhanced Water OmegaChill to be Distributed at NFL Alumni Super Bowl XLIV Weekend Events on February 5-7th, 2010
11. Secrets to superb malting barleys explored by ARS researchers
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/26/2017)... , Jan. 26, 2017  Acuity Market ... for Biometrics and Digital Identity".  Acuity characterizes 2017 ... identity when increased adoption reflects a new understanding ... "Biometrics and digital identity are often ... Maxine Most , Principal of Acuity Market ...
(Date:1/23/2017)... , Jan. 23, 2017  The latest mobile ... smartphone prices have dropped dramatically. The quarterly average price ... 2013 to $276 in Q4 2016.  There are now ... price of $116, up from just 28 a year ... According to Maxine Most , Acuity Market ...
(Date:1/18/2017)... , Jan. 18, 2017  In vitro diagnostic ... to mergers and acquisitions (M&A), and Kalorama Information expects ... such acquisitions have been shifting. Generally, uncertainty in reimbursement ... and the U.S. has changed the acquisitions landscape. Instead ... resulted in companies buying partners outside of their home ...
Breaking Biology News(10 mins):
(Date:2/16/2017)... Feb. 16, 2017  ArmaGen, Inc., a privately ... to treat severe neurological disorders, today reported preliminary ... AGT-181, the company,s investigational therapy for the treatment ... mucopolysaccharidosis type I, or MPS I). The initial ... study, presented today at the 13 th ...
(Date:2/16/2017)... DENVER , Feb. 16, 2017 UCHealth ... hospital to utilize LungDirect for pulmonary nodule patient management. ... a nodule, or a spot on the lung, UCHealth ... spent on manual data entry. Stephanie ... been tracking my nodule patients with an Excel spreadsheet, ...
(Date:2/16/2017)... 16, 2017  Rhythm, a biopharmaceutical company ... that result in life-threatening metabolic disorders, today ... mezzanine round of financing with existing investors ... New Enterprise Associates, Pfizer Venture Investments, Third ... investment fund. Rhythm will use the proceeds ...
(Date:2/15/2017)... 15. Februar 2017  Trianni, Inc. („TRIANNI") gab ... (Janssen) eine Lizenzvereinbarung über die Verwendung der The ... Plattform für die Entdeckung monoklonaler Antikörper. ... chimäres Gensegmentdesign aus, das Janssen den Zugang ... bietet und das für die schelle Isolierung vollständig ...
Breaking Biology Technology: