Non-exhaust emissions from road traffic upset electric vehicle ‘clean air’ hopes

Posted: July 14, 2019 by oldbrew in Emissions, pollution, Travel
Tags:


It seems switching to an EV can only scratch the surface of the clean air problems due to motor transport. Since their batteries make them heavier than fuel-burning cars they should have greater tyre wear, creating more road debris. Of course the parallel claim is that there will/would be some noticeable (presumed beneficial) effect on the climate in the long term due to lower CO2 emissions, but as we’re also told there’s little time left and sales of EVs are minimal, that doesn’t look good for climate alarmists either.

A new report released by the Air Quality Expert Group (AQEG) in the UK recommends as an immediate priority that non-exhaust emissions (NEE) are recognized as a source of ambient concentrations of airborne PM, even for vehicles with zero exhaust emissions of particles, reports Green Car Congress.

Non-exhaust emissions (NEE) from road traffic refers to particles released into the air from brake wear, tyre wear, road surface wear and re-suspension of road dust during on-road vehicle usage. These emissions arise regardless of the type of vehicle and its mode of power, and contribute to the total ambient particulate matter burden associated with human ill-heath and premature mortality. No legislation is currently in place specifically to limit or reduce NEE particles, so whilst legislation has been effective at driving down emissions of particles from the exhausts of internal-combustion-engine vehicles, the NEE proportion of road traffic emissions has increased.

Data from the UK National Atmospheric Emissions Inventory indicate that particles from brake wear, tyre wear and road surface wear currently constitute 60% and 73% (by mass), respectively, of primary PM2.5 and PM10 emissions from road transport, and will become more dominant in the future. Currently they contribute 7.4% and 8.5% of all UK primary PM2.5 and PM10 emissions. Therefore to achieve further gains in PM2.5 and PM10 air quality in relation to road transport sources requires attention to reducing non-exhaust emissions, not solely a focus on lowering exhaust emissions.

—“Non-Exhaust Emissions from Road Traffic”

NEE particles are also an important source of metals to the atmosphere; the UK national inventory estimates NEE contributions of 47% and 21% for Cu and Zn, primarily associated with brake and tire wear, respectively. The national inventory does not include estimates of road dust re-suspension.

Continued here.

Comments
  1. hunterson7 says:

    There is no satisfying fanatics. They are true regressives, constantly moving the goal posts.
    No one had heard of “NEE” before now.
    There is every reason to believe that these grand sounding terms are actually describing something very minor.

  2. oldbrew says:

    Road dust biggest source of pollution in Mumbai

    a detailed analysis of pollution in Mumbai in 2010 shows that vehicular pollution accounts for less than 6% of particulate pollution in the city.

    Read more at:
    http://timesofindia.indiatimes.com/articleshow/50156802.cms
    – – –
    Not cars, but road dust is the biggest polluter in Delhi!

    Road dust contributed 56% of all PM10 pollution while it was 38% for PM2.5.

    https://zeenews.india.com/news/eco-news/not-cars-but-road-dust-is-the-biggest-polluter-in-delhi_1839594.html

  3. Gamecock says:

    Once PM2.5 is solved, they’ll go after PM0.001.

    PM2.5 particles are so small that they can only be detected with an electron microscope. But you should be skeert.

    ‘A new report released by the Air Quality Expert Group (AQEG) in the UK recommends as an immediate priority that non-exhaust emissions (NEE) are recognized as a source of ambient concentrations of airborne PM, even for vehicles with zero exhaust emissions of particles, reports Green Car Congress.’

    Recognized as a source. Okay. Seems innocuous enough. But who believes they’ll stop there? Steve Milloy at junkscience.com has fully debunked the PM2.5 scare.

    ‘No legislation is currently in place specifically to limit or reduce NEE particles’

    Ahhh, so they aren’t just doing basic research. They’re doing political science.

  4. tom0mason says:

    Yep, all those tyres (or tires) being slowly ground-up as you drive is a significant source of real carbon (black dust) pollution in every city. Brake-pads too …
    Thankfully it rains here to keep it in check.
    If it gets too much, drive out to the country for some fresh air and gawk at the ugly windfarms.
    😦

  5. oldbrew says:

    Looks like they’re trying to link air pollution to Alzheimer’s disease…

    Team finds high concentrations of combustion- and friction-derived magnetic air pollution nanoparticles in human hearts in Mexico City
    15 July 2019

    An international team led by Professor Barbara Maher, of Lancaster University in the UK, has found that iron-rich, magnetic combustion- and friction-derived nanoparticles (CFDNPs), which are abundant in particulate air pollution, are highly abundant in the hearts of young urban residents with lifelong exposure to high concentrations of particulate air pollution above current USEPA standards.

    A 2016 study by Professor Maher and colleagues found abundant magnetite nanoparticles in brain tissue; magnetite is toxic and has been implicated in the production of reactive oxygen species (free radicals) in the human brain, which are associated with neurodegenerative diseases including Alzheimer’s disease.

    https://www.greencarcongress.com/2019/07/20190715-cfdnp.html

  6. Gamecock says:

    It isn’t pollution unless it causes adverse change. It doesn’t.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s