Featured Research

from universities, journals, and other organizations

Ban on pavement sealant lowered levels of potentially harmful compounds in lake

Date:
June 18, 2014
Source:
American Chemical Society
Summary:
In 2006, Austin, Texas, became the first city in the country to ban a commonly used pavement sealant over concerns that it was a major source of cancer-causing compounds in the environment. Eight years later, the city's action seems to have made a big dent in the targeted compounds' levels -- researchers now report that the concentrations have dropped significantly.

n 2006, Austin, Texas, became the first city in the country to ban a commonly used pavement sealant over concerns that it was a major source of cancer-causing compounds in the environment. Eight years later, the city's action seems to have made a big dent in the targeted compounds' levels -- researchers now report that the concentrations have dropped significantly. They published their study, which could have broad implications for other jurisdictions and public health, in the ACS journal Environmental Science & Technology.

Related Articles


Peter C. Van Metre and Barbara J. Mahler point out that in 2005, researchers figured out that pavement sealants made from coal tar were contributing high levels of polycyclic aromatic hydrocarbons (PAHs) to the environment. This is a serious public concern because studies have shown that PAHs cause cancer in animals, and they likely impact human health as well. In the meantime, U.S. developers and residents are still coating driveways and parking lots with millions of gallons of coal-tar sealants every year. Some local and state governments have banned coal-tar sealants, but no one knew what kind of effect the interdictions were having. To find out, Mahler and Van Metre's team decided to investigate whether Austin's ban was in fact lowering local PAH levels.

They sampled the mud at the bottom of Lady Bird Lake, which receives much of the water running off Austin's streets and parking lots. Using historic data and their new analyses, the scientists found that after a 40-year rise in PAHs in the lake's sediments, the ban knocked levels down by about half. Concentrations are still continuing to decline, they say.

The authors acknowledge funding from the U.S. Geological Survey.


Story Source:

The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Peter C. Van Metre, Barbara J. Mahler. PAH Concentrations in Lake Sediment Decline Following Ban on Coal-Tar-Based Pavement Sealants in Austin, Texas. Environmental Science & Technology, 2014; 140616132032001 DOI: 10.1021/es405691q

Cite This Page:

American Chemical Society. "Ban on pavement sealant lowered levels of potentially harmful compounds in lake." ScienceDaily. ScienceDaily, 18 June 2014. <www.sciencedaily.com/releases/2014/06/140618122253.htm>.
American Chemical Society. (2014, June 18). Ban on pavement sealant lowered levels of potentially harmful compounds in lake. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2014/06/140618122253.htm
American Chemical Society. "Ban on pavement sealant lowered levels of potentially harmful compounds in lake." ScienceDaily. www.sciencedaily.com/releases/2014/06/140618122253.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Touch-Free Smart Phone Empowers Mobility-Impaired

Touch-Free Smart Phone Empowers Mobility-Impaired

Reuters - Innovations Video Online (Dec. 21, 2014) — A touch-free phone developed in Israel enables the mobility-impaired to operate smart phones with just a movement of the head. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) — Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) — What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Obama: Better Ways to Create Jobs Than Keystone Pipeline

Obama: Better Ways to Create Jobs Than Keystone Pipeline

AFP (Dec. 19, 2014) — US President Barack Obama says that construction of the Keystone pipeline would have 'very little impact' on US gas prices and believes there are 'more direct ways' to create construction jobs. Duration: 00:47 Video provided by AFP
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

 

Space & Time

Matter & Energy

Computers & Math

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