Featured Research

from universities, journals, and other organizations

Fresh air: Special air filter blocks small particles called UFPs from getting inside cars

Date:
February 19, 2014
Source:
American Chemical Society
Summary:
While taking in the scenery during long road trips, passengers also may be taking in potentially harmful ultrafine particles that come into the car through outdoor air vents. Closing the vents reduces ultrafine particles, but causes exhaled carbon dioxide to build up. Now, scientists report that installing a newly developed high-efficiency cabin air filter could reduce ultrafine particle exposure by 93 percent and keep carbon dioxide levels low.

While taking in the scenery during long road trips, passengers also may be taking in potentially harmful ultrafine particles (UFPs) that come into the car through outdoor air vents. Closing the vents reduces UFPs, but causes exhaled carbon dioxide to build up. Now, scientists report in the ACS journal Environmental Science & Technology that installing a newly developed high-efficiency cabin air filter (HECA) could reduce UFP exposure by 93 percent and keep carbon dioxide levels low.

Yifang Zhu and Eon Lee explain that most modern cars come with cabin air filters, but they only block 40-60 percent of the UFPs when in "outdoor air mode." These particles are 100 nanometers or less in diameter; about a thousand of them could fit across the width of a human hair. Studies suggest that UFPs, which are found in automotive exhaust, may be linked with health problems. Switching the venting system into "recirculation mode" reduces UFPs by 90 percent, but because the interior is closed off from the outside, exhaled carbon dioxide can potentially build up to levels that could impair decision-making. To address this challenge, Zhu and Lee decided to develop a method that would simultaneously reduce UFPs inside cars, while also allowing carbon dioxide to escape.

They developed HECA filters that could reduce UFP levels by an average of 93 percent in 12 commercially available vehicles while driving in outdoor air mode. Compared with the original manufacturer-installed filters, the new one is made of synthetic fibers of much smaller diameters. Carbon dioxide remained at a "reasonable" level, they say.


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. Eon S. Lee, Yifang Zhu. Application of a High-Efficiency Cabin Air Filter for Simultaneous Mitigation of Ultrafine Particle and Carbon Dioxide Exposures Inside Passenger Vehicles. Environmental Science & Technology, 2014; 140207112527005 DOI: 10.1021/es404952q

Cite This Page:

American Chemical Society. "Fresh air: Special air filter blocks small particles called UFPs from getting inside cars." ScienceDaily. ScienceDaily, 19 February 2014. <www.sciencedaily.com/releases/2014/02/140219113426.htm>.
American Chemical Society. (2014, February 19). Fresh air: Special air filter blocks small particles called UFPs from getting inside cars. ScienceDaily. Retrieved August 23, 2014 from www.sciencedaily.com/releases/2014/02/140219113426.htm
American Chemical Society. "Fresh air: Special air filter blocks small particles called UFPs from getting inside cars." ScienceDaily. www.sciencedaily.com/releases/2014/02/140219113426.htm (accessed August 23, 2014).

Share This




More Earth & Climate News

Saturday, August 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Airlines on Iceland Volcano Alert

Airlines on Iceland Volcano Alert

Reuters - Business Video Online (Aug. 22, 2014) Iceland evacuates an area north of the country's Bardarbunga volcano, as the country's civil protection agency says it cannot rule out an eruption. Authorities have already warned airlines. As Joel Flynn reports, ash from the eruption of the Eyjafjallajokull volcano in 2010 shut down much of Europe's airspace for six days. Video provided by Reuters
Powered by NewsLook.com
Endangered Red Wolves Face Uncertain Future

Endangered Red Wolves Face Uncertain Future

AP (Aug. 22, 2014) A federal judge temporarily banned coyote hunting to save endangered red wolves, but local hunters say that the wolf preservation program does more harm than good. Meanwhile federal officials are reviewing its wolf program in North Carolina. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Coal Gas Boom in China Holds Climate Risks

Coal Gas Boom in China Holds Climate Risks

AP (Aug. 22, 2014) China's energy revolution could do more harm than good for the environment, despite the country's commitment to reducing pollution and curbing its carbon emissions. (Aug. 22) Video provided by AP
Powered by NewsLook.com
Microbrewery Chooses Special Can for Its Beer

Microbrewery Chooses Special Can for Its Beer

AP (Aug. 22, 2014) Aluminum giant, Novelis, has partnered with Red Hare Brewing Company to introduce the first certified high-content recycled beverage can. (Aug. 22) Video provided by AP
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:
from the past week

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