Featured Research

from universities, journals, and other organizations

'Super socks' help stem pollution runoff

Date:
July 25, 2010
Source:
USDA/Agricultural Research Service
Summary:
Agricultural scientists 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.

ARS scientists and their collaborators found a way to improve the ability of compost filled mesh tubes called filter socks to remove silt, heavy metals, fertilizers and petroleum products from storm water runoff by adding flocculation agents.
Credit: Photo courtesy of Filtrexx International

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.

Related Articles


"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.

Results from this research were published in the Journal of Environmental Quality.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. The original article was written by Ann Perry. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "'Super socks' help stem pollution runoff." ScienceDaily. ScienceDaily, 25 July 2010. <www.sciencedaily.com/releases/2010/07/100723112801.htm>.
USDA/Agricultural Research Service. (2010, July 25). 'Super socks' help stem pollution runoff. ScienceDaily. Retrieved November 25, 2014 from www.sciencedaily.com/releases/2010/07/100723112801.htm
USDA/Agricultural Research Service. "'Super socks' help stem pollution runoff." ScienceDaily. www.sciencedaily.com/releases/2010/07/100723112801.htm (accessed November 25, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Tuesday, November 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Antarctic Sea Ice Mystery Thickens... Literally

Antarctic Sea Ice Mystery Thickens... Literally

Newsy (Nov. 25, 2014) — Antarctic sea ice isn't only expanding, it's thicker than previously thought, and scientists aren't sure exactly why. Video provided by Newsy
Powered by NewsLook.com
3D Map of Antarctic Sea Ice to Shed Light on Climate Change

3D Map of Antarctic Sea Ice to Shed Light on Climate Change

Reuters - Innovations Video Online (Nov. 24, 2014) — A multinational group of scientists have released the first ever detailed, high-resolution 3-D maps of Antarctic sea ice. Using an underwater robot equipped with sonar, the researchers mapped the underside of a massive area of sea ice to gauge the impact of climate change. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com
Car Park Solution for Flexible Green Energy

Car Park Solution for Flexible Green Energy

Reuters - Innovations Video Online (Nov. 24, 2014) — A British solar power start-up says that by covering millions of existing car park spaces around the UK with flexible solar panels, the country's power problems could be solved. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Yellow-Spotted Turtles Rescued from Trafficking

Yellow-Spotted Turtles Rescued from Trafficking

Reuters - Light News Video Online (Nov. 24, 2014) — Hundreds of Amazon River turtles released into the wild in Peru. Sharon Reich reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins