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Ionic Air Purifiers may actually Increase Particle Concentrations

Byoliveridley

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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Rally for Climate Change Tomorrow in your Neighbourhood

Byoliveridley

So, to draw attention to the need to dial CO2 emissions down to 350 ppm, 350.org is organizing a series of worldwide events. This one is in my neck of the woods and I plan to be there. Go to the website to find out where yours is and show up. You will be part of the world’s largest climate change rally, 4500 events in 173 countries. Who knows, you might meet an interesting person or two, or the love of your life :-0 (hey, it’s happened before!)

Victoria350.org is a collaboration of numerous community groups who are coming together to host FutureFest Victoria, a celebration to raise awareness around the number 350. There will be a kids corner with crafts, an art-based community visioning space, main stage music, a flash dance mob, local non-profit and community business tables, organic produce and coffee, topped off with a 350 bike ride downtown. Bring the whole family and come down for a fun and meaningful afternoon. All are welcome!

via FutureFest Victoria | 350.org.

FYI, the Victoria event is at Centennial Square tomorrow from 12-4.

US legislator proposes a carbon tax

Byoliveridley

Of course, he’s not serious. Dingell (D – Auto Industry) floats a carbon tax proposal for the US that is sure to be shot down.

Counting on Failure, Energy Chairman Floats Carbon Tax – New York Times

A powerful House Democrat said on Friday that he planned to propose a steep new “carbon tax” that would raise the cost of burning oil, gas and coal, in a move that could shake up the political debate on global warming.

The proposal came from Representative John D. Dingell of Michigan, chairman of the House Energy and Commerce Committee, and it runs directly counter to the view of most Democrats that any tax on energy would be a politically disastrous approach to slowing global warming.

But Mr. Dingell, in an interview to be broadcast Sunday on C-Span, suggested that his goal was to show that Americans are not willing to face the real cost of reducing carbon dioxide emissions. His message appeared to be that Democratic leaders were setting unrealistic legislative goals.

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Jeffrey Sachs on climate change induced water shortages

Byoliveridley

Depressing reading for a Sunday morning. He does not offer too many solutions, but it will take a lot of local work to mitigate these disasters. Of course, I can’t see the US or Europe offering asylum to climate change refugees!

Climate Change Refugees: Scientific American

Human-induced climate and hydrological change is likely to make many parts of the world uninhabitable, or at least uneconomic. Over the course of a few decades, if not sooner, hundreds of millions of people may be compelled to relocate because of environmental pressures.

To a significant extent, water will be the most important determinant of these population movements. Dramatic alterations in the relation between water and society will be widespread, as emphasized in the new report from Working Group II of the Intergovernmental Panel on Climate Change. These shifts may include rising sea levels, stronger tropical cyclones, the loss of soil moisture under higher temperatures, more intense precipitation and flooding, more frequent droughts, the melting of glaciers and the changing seasonality of snowmelt.

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Cleaner Air Brings Drop in Death Rate – New York Times

Byoliveridley

Cleaner Air Brings Drop in Death Rate – New York Times

When air pollution in a city declines, the city benefits with a directly proportional drop in death rates, a new study has found.

In other news, Dog bites man (I have never typed “dog bites man” into google news before – shocking…)

Well, the Dockery and company published a seminal set of articles on the 6 city study back in the 90s that are the gold standard of air pollution epidemiology. It takes large long-term studies like these to establish even tenuous correlations, and their graphs connecting particle concentrations and mortality were beautiful straight lines.

This follow up is pretty cool because the cities had made most of the reductions in the 70s and 80s after the passage of the Clean Air Act and this study clearly demonstrates that the bar for lowering mortality/cancer rates by lowering fine particle levels has not been reached yet. The abstract of the paper is below the fold.

Read More “Cleaner Air Brings Drop in Death Rate – New York Times”

Melamine movin' on up the food chain

Byoliveridley

The FDA mentioned recently that the melamine suspected of poisoning many cats had gotten into pig feed in California, well, it gets worse…

Tuesday: Uh-Oh — North Carolina Public Radio WUNC

The FDA announced this afternoon that thousands of hogs in NC and four or five other states are now under quarantine because they were fed tainted rice gluten. Hogs here and in CA have tested positive for melamine. No one knows yet whether it poses any dangers to humans who ate the hogs, but the feds say they’re trying to find out.

At this point in time, I would consider any animal feed from China suspect. Way out of control, because we have no procedure for being proactive about these things…

It won’t amount to much because melamine apparently does not affect humans as much as it seems to affect cats, but it is the utter lack of control of ingredients and raw materials that scares me. What else can sneak through? What if the next one is actually deadly to humans?

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Eastern United States vulnerable to climate change

Byoliveridley

http://www.eurekalert.org/pub_releases/2007-12/pu-sdn121007.php
6157_rel.jpg
Time to get out of the Eastern United States? A study to be published in the Proceedings of the National Academies of Science tries to quantify the relative risk of climate change using something called a “socioclimatic” risk factor. As always, the redder the worse. A look at the paper would no doubt be more illuminating, but for some reason, press releases about PNAS papers come out way before the papers actually become public. China is in bright red all the way, India in a rather bright orange. Where I live, the Eastern United States, is a nice beet red. No doubt, the unprecedented drought the South is experiencing right now is a nice big red signal.

Interesting stuff, though the actual paper will tell the story. Any technique that tries to integrate all the complex scientific, social and economic variables of climate change into one number is bound to have a flaw or two. But such a metric is useful for estimating relative risk, as the authors themselves say.

He added that the study does not address the absolute degree of impact or risk.

“This study illustrates exposure of one nation relative to another,” Diffenbaugh said. “Thus, it is important to note that a country low on the relative scale could still face substantial risk.”

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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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