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Ionic Air Purifiers may actually Increase Particle Concentrations

Take that, Sharper Image, your air purifiers that you waste tons of paper sending me monthly catalogs for don’t work. The ones that use ozone react with organic compounds in the air, especially your fragrances in cleaning products, air fresheners and perfumes to make fine particles in that crucial 0.1-1 um size range that your lungs don’t clear very effectively.

Not a big deal in the grand scheme of things, especially with other indoor pollutants. But I always thought these air purifiers were a scam, I am glad somebody actually got the NSF to fund this study and get some proof!

Kinetic Analysis of Competition between Aerosol Particle Removal and Generation by Ionization Air Purifiers

Kinetic Analysis of Competition between Aerosol Particle Removal and Generation by Ionization Air Purifiers

Ahmad Alshawa, Ashley R. Russell, and Sergey A. Nizkorodov*

Department of Chemistry, University of California, Irvine, California 92697-2025

Abstract:

Ionization air purifiers are increasingly used to remove aerosol particles from indoor air. However, certain ionization air purifiers also emit ozone. Reactions between the emitted ozone and unsaturated volatile organic compounds (VOC) commonly found in indoor air produce additional respirable aerosol particles in the ultrafine (This model predicts that certain widely used ionization air purifiers may actually increase the mass concentration of fine and ultrafine particulates in the presence of common unsaturated VOC, such as limonene contained in many household cleaning products. This prediction is supported by an explicit observation of ultrafine particle nucleation events caused by the addition of D-limonene to a ventilated office room equipped with a common ionization air purifier.

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    Lead in Paint, why???

    1940-11_White_Lead_Paint.JPGThis makes my head explode, once again, science is helpless when faced with inertia, and greed. Lead-based paint has been banned in the US since 1978, and if this story is any indication, we’re still seeing the effects of peeling paint. But this bit of research from the University of Cincinnati suggests that not only is lead-based paint being used in more than half the world, it is actually legal.

    Study Supports ‘Urgent’ Need for Worldwide Ban on Lead-Based Paint

    Environmental and occupational health experts at the University of Cincinnati (UC) have found that major countries—including India, China and Malaysia—still produce and sell consumer paints with dangerously high lead levels.

    Why would anyone need to use lead-based paint when alternatives have been available for the longest time, the health effects of lead, especially on children, are very well known, and there is no @#$%^&*# reason other than greed and unwillingness to change. What is the point of all these years of research if it makes no difference at all to the bulk of the world’s population? Depressing.

    Guess what, even if lead-based paint was banned today, it’s still going to be on the walls forever. As the paint peels, kids will be exposed, have lowered IQ, and all other kinds of health issues for as long as that house is standing, which in India could be a 100 years.

    Grassroots organizing is probably needed, and if effective, the stuff will be banned in India quickly, the government does move rapidly on these kinds of easy to legislate issues. But, enforcement will be lax, and awareness will lag, which means we are looking at (my rough guess) at least 20 years more of this issue.

    Once again, the absence of a ban and its implementation affects the poor and uneducated disproportionately. The way I see it happening in India is

    1. Some grassroots awareness, media stories, etc.
    2. A furore that lasts about a week, before the next big story comes along
    3. Maybe a government action that will “ban” lead-based paint
    4. The middle class and above are now aware that they can use titania based paints, so, a quick change for them.
    5. Everyone else is still stuck with the lead-based paint.

    And this does not even begin to address what the US is going through now, aging houses, peeling paint, poor people being exposed to dangerous levels of lead.

    The world ain’t very fair…

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    Genes Make Indians Fat

    Scientists have pinpointed a reason why people with Indian ancestry may be more prone to weight problems.They have found this group is more likely to carry a gene sequence linked to an expanding waist line, weight gain and type 2 diabetes.The sequence, discovered by a team led by Imperial College London, is carried by 50% of the population – but is a third more common in Indian Asians.

    BBC NEWS | Health | Genes ‘up Indians’ obesity risk’

    Relax, all desis, it’s not your fault, it’s genetics.

    Blogged with the Flock Browser
  • Powerful Story of Environmental Racism

    I have nothing to say, just read and weep.

    A Well of Pain – washingtonpost.com

    She has had cervical polyps. Another of her daughters, Holt-Orsted’s sister, has had colon polyps. Three of Holt-Orsted’s cousins have had cancer. Her aunt next door has had cancer. Her aunt across the street has had chemotherapy for a bone disease. Her uncle died of Hodgkin’s disease. Her daughter, 12-year-old Jasmine, has a speech defect.

    They believe trichloroethylene, or TCE, is to blame for it all. The carcinogen leaked from the county landfill, just 500 feet away, and contaminated the Holts’ well water. That fact is undisputed. For years, the family drank that water, bathed in that water, cooked in that water — and had no clue that it might harm them.

    More…

    In that box, she found letters and documents indicating that Tennessee environmental and water officials had concerns about the possibility of TCE appearing in the Holt’s well water as early as 1988. The Holts’ well was left untested for nine years while TCE problems in the wells of white families were tended to with haste, the records showed.

    Even more…

    Meanwhile, the toxin also showed up at high levels in a spring and several wells in 1993 and 1994. The white families at those sites were immediately told to stop using the water. And tests were conducted repeatedly all around the landfill — but not at the Holt well.

  • BC and Carbon

    As BC’s Carbon Tax enters the terrible twos, and is the subject of stupid headlines in the CBC trumpeting a 1.5c/L increase in gasoline price (smaller than the price difference between a pump in the Saanich Peninsula and outside), it is worthwhile to see what the rest of the province’s carbon strategy is, or isn’t doing.

    Metro – B.C. looks to carbon capture to balance clean-air targets with energy revenues

    Economic realities and environmental promises are creating an explosive mixture for the recession-fighting B.C. government as it juggles expansion in its oil and gas industry with the need to cut greenhouse gases.

    Massive untapped gas fields in northeastern British Columbia hold billions in potential revenues, but environmentalists are watching to see if Premier Gordon Campbell will stick to his promise to fight global warming by cutting emissions by one-third by 2020.

    This is one of the issues with relying solely on a carbon tax to reduce GHG emissions, it is inadequate. A carbon tax is a consumption tax levied at the point of sale, not at the point of production. The BC government has gotten a lot of positive press for the carbon tax, but it is reliant on natural gas and oil to bring in some revenue. After all, the lumber industry is dying with the US housing bust, and something needs to get the province out of deficit as the BC government will not countenance any tax increases whatsoever.

    The weakness of the province’s carbon plan is best typified by quotes from a couple of fossil fuel executives/government officials:

    “The question is, if I were to make this big investment, who’s going to pay me to do that so I can generate a return for my shareholders? Weilinger asks.

    Horne agrees there is no business case for oil and gas companies to justify carbon capture projects to shareholders, but says industry needs to support greenhouse gas reductions.

    The notion that industry will somehow support reductions is hilariously disingenuous. Carbon capture and storage is an untested and expensive technology even when it comes to sources where all the CO2 comes out of one tailpipe, like a power plant. The notion that it can be used in an activity as widespread and diffuse as oil/gas drilling is laughable. The best way for these companies can be forced to make their mining more GHG emission friendly is to price their actions according to their GHG production footprint, something a differently designed carbon price would do.

    BC’s carbon tax, in my book, was a shrewdly designed political maneuver to undercut traditional environmentalist support for the opposition NDP, which very “smartly” took the bait and campaigned against it in a recent election earning howls of disgust from the mainstream environmental movement.

    When it actually comes to cleaning up and taking actions that will actually reduce the province’s GHG footprint, the government is found wanting, as expected.

  • Benzene in soft drinks – Flavor of the Month?

    Benzene Levels in Soft Drinks Above Limit – Yahoo! News

    WASHINGTON – Cancer-causing benzene has been found in soft drinks at levels above the limit considered safe for drinking water, the Food and Drug Administration acknowledged Wednesday.
    Even so, the FDA still believes there are no safety concerns about benzene in soft drinks, or sodas, said Laura Tarantino, the agency’s director of food additive safety.”We haven’t changed our view that right now, there is not a safety concern, not a public health concern,” she said. “But what we need to do is understand how benzene forms and to ensure the industry is doing everything to avoid those circumstances.”

    The admission contradicted statements last week, when officials said FDA found insignificant levels of benzene.

    In fact, a different study found benzene at four times the tap water limit, on average, in 19 of 24 samples of diet soda.

    The formation of benzene in soft drinks is from the reaction of ascorbic acid (aka Vitamin C) and benzoate salts, notably sodium benzoate which is used as a preservative. As the FDA letter states:

    We learned that elevated temperature and light can stimulate benzene formation in the presence of benzoate salts and vitamin C, while sugar and EDTA salts inhibit benzene formation.

    Is this a pressing concern? First of all, exposure modeling done by the EPA indicates that 93% of all benzene exposure is through inhalation (cigarette smoke, indoor offgassing, that wonderful refueling smell!), with 7% exposure through oral ingestion. So, potentially elevated levels in this 7% fraction are not likely to greatly increase exposure. In addition, the 5 parts per billion level for drinking water is set based on an assumed daily consumption of 2 liters per day (Source – USEPA), a safety factor up from the actual estimated 0.9-1.2 L per day measured consumption. Assuming the average amount of benzene in soda (mainly diet, mind you) is 4 times that of drinking water, a 500 ml dose of diet soda per day is required to equal the dose from drinking water, which mind you, only counts for 7% of the total bezene exposure. So in a sense, a person drinking 2 servings of diet soda per day would exceed the exposure from drinking water at the federally regulated level, and knock the socks off the California standard of 0.13 ppb in water. This will increase his/her known oral exposure. The total exposure to benzene of that individual, however, would not go up significantly because the overwhelming majority of the exposure still occurs through the nose, not through the mouth.

    The issue here, and benzene is just the symptom, is that consumers know much more about their drinking water than they do about their manufactured food products, and that is not good for the consumer or for the industry because in the absence of knowledge and full disclosure, both parties are vulnerable. Which is why attempts to limit consumer knowledge hurt everyone.

    Conclusion Please don’t stop drinking soda because of this, I am sure you can find plenty of other reasons to limit your soda consumption… Drink lots of filtered tap water, it’s the best!! And, I can assure you that most tap water is tested thoroughly, it’s zero calories and cheap!

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    Conventional biofuels are evil, part 4233241

    English to American Translation:

    Rapeseed = Canola.
    Maize = Corn.

    Turns out that all the nitrate fertilizer you use to grow all the corn and canola you need emits a lot of Nitrous Oxide. No laughing matter, this, N2O is an incredibly powerful greenhouse gas.

    Rapeseed biofuel ‘produces more greenhouse gas than oil or petrol’ – Times Online: “Measurements of emissions from the burning of biofuels derived from rapeseed and maize have been found to produce more greenhouse gas emissions than they save.

    Other biofuels, especially those likely to see greater use over the next decade, performed better than fossil fuels but the study raises serious questions about some of the most commonly produced varieties.

    Rapeseed and maize biodiesels were calculated to produce up to 70 per cent and 50 per cent more greenhouse gases respectively than fossil fuels. The concerns were raised over the levels of emissions of nitrous oxide, which is 296 times more powerful as a greenhouse gas than carbon dioxide”

7 Comments

  1. We seem to live in a world of dangers, and truthfully I’m not sure that we can ever truly eliminate most of them – or at least, when we do, we usually wind up creating a new one. There’s something about environmental theories and perhaps chaos theory. Everything seems to be interdependent, and so what we get when we seem to “advance” technologically is not truly “advancement” but rather simple “change.” We buy cell phones, in part so that we will be safer – if our car breaks down on the freeway, we aren’t completely isolated from the world. Then we hear that they cause accidents, and, perhaps even scarier, long term exposure to the speaker has been shown to cause tumors. We build a machine to make the air cleaner and it winds up creating dangerous particles that are too small for it to filter. We kill a deadly virus, but this causes viruses to mutate and become far more resistant. Are there any real “solutions”?

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