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New Study Links Diesel Particulates And Heart Disease


Tough Tractor Trailer

Tough Tractor Trailer

It’s no secret that diesel fumes from trucks, buses and older diesel automobiles can be linked to health issues.

Those with asthma or other respiratory conditions are often advised to limit time outdoors on days with poor air quality, so the public has come to associate pollution with breathing difficulties. Now a team of researchers from the University of Edinburgh has identified a link between diesel particulates and heart attacks.

The issue is ultrafine particles released by the combustion of diesel fuel in older diesel cars and trucks. Starting in 2009 for cars, and 2010 for heavy trucks, stricter emissions standards required more aggressive exhaust aftertreatment to reduce emissions of these particulates.

These ultrafine particles are invisible to the naked eye, measuring less than a millionth of a meter in size, but they produce highly reactive free radicals that damage blood vessels and increase the potential for blood clot formation.

Long-term exposure can lead to heart attacks or strokes, and this effect is amplified in patients with existing heart conditions or vascular disease.

The good news is that these particulates can be filtered out of diesel exhaust via the use of particulate traps, which are already being fitted to buses in the U.S. to minimize public health effects.

Clean diesels, which filter out the particulates, and diesel vehicles using urea injection systems don’t require additional particulate traps to produce safe tailpipe emissions .

While scientists can agree that the ultrafine particulates are hazardous to human health, they don’t yet know the specific compounds that cause free radicals to form. Studies are underway to identify the chemicals carried by the particulates, so that they can potentially be removed from diesel fuel in the future.

In the mean time, the Edinburgh researchers have this piece of common-sense advice: if you already suffer from heart disease, try to limit your time outdoors in  high pollution areas.

[Science Daily via Autoblog Green]

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Comments (3)
  1. Burning things is generally bad for your health. No one burns gasoline, diesel fuel, or wood in their homes without serious ventilation. Why? because we all know it is bad for us. The sole exception that I can think of is natural gas which seems to burn cleanly enough that we happily let it vent into our kitchens.
    We really need to stop burning things (except maybe nat. gas) and move to hydro, solar, wind, and (gulp) nuclear energy.
    Also, while diesel trucks may have filters, I burn diesel (home heating oil) in my house without any filters and happily exhaust the combustion products into the air above my home. That can't be good.
    Later
    John C. Briggs
     
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    Vote
    Bad stuff?

     
  2. Yes, setting fire to the remains of our ancestors does seem bizarre.
     
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    Bad stuff?

  3. I've alway thought as I looked at diesel cars and trucks in traffic that the black cloud I was seeing them emit had to be bad. I hope a few thousand people read this and remember it because this yet another reason we need to strive for zero emissions.
     
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    Bad stuff?

 

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