Posts Tagged ‘chemicals’

The 3 Biggest Indoor Air Threats

November 25th, 2009
indoorair

The Airborne Threats Inside Your Home

There is an oft quoted statistic that indoor air is 40-100 times more polluted than outdoor sir in a non smoking house and up 400 times more polluted in a smoking house.  There are also a bunch of disease stats that show how prevalent lung conditions are and how they are increasing.

The point of all this is that your air sucks.  And you should do something about it.

But do you even know what it is that you should be concerned with? What is it exactly that makes indoor air so bad?

First, you have biological contaminants.

Your house is warm, wet enough and has food for a whole bunch of things.  But there are 2 in particular that warrant special mention, and they are responsible for the majority of respiratory conditions.

The first things are dust mites.  These little critters are all over the place, and they feed on the #1 component of household dust – flaked off skin cells.  While they have decent populations on pretty much every surface in the home, they are especially prevalent on soft, upholstered surfaces and things covered in fabric. The number one place being in your bed.

While the mites themselves are bad, it’s actually their feces that cause the problem.  They cause a host of reactions in people, and are the second leading cause of allergies (the first being genetic predisposition). So you have to keep the mite feces out of your air.

More on dust mites – http://healthandenergy.com/dust_mites.htm

Second is mold.

This is nasty stuff, and it gets a foothold when your air is too humid.  Once established it releases microscopic spores into the air, and if you breathe enough of them you can get an exotic fungal infection in your lungs.

That is bad…very, very, bad.  Mold is such a threat that if there is enough of it in your home you are not allowed to remove it on your own – specialists with gear have to be called in.  It’s not something to take lightly.

More on mold – http://www.mouldfacts.ca/

Next, we move on to chemicals.

Even if you don’t smoke there are a bunch of things slowly off gassing a host of potent carcinogens into your homes’ air.

There are a ton of these, so I’ll only go over a couple of the most common.

Formaldehyde is probably the most common. This is embalming fluid, and it is used as a preservative.  With many goods facing long delays between the time they are manufactured and the time they end up in the consumer’s house they have to maintain their “newness” for quite some time.  Enter formaldehyde.  Not only does it preserve a good in its’ freshly made condition, it is a huge deterrent to pests which might otherwise snack on it.

It makes you wonder when even insects are smart enough to steer clear of something.

More on formaldehyde – http://www.arb.ca.gov/research/indoor/formaldehyde.htm

The second are flame retardants.  These are known as PBDEs and are extremely toxic.  If you’ve ever been in a department store and all of a sudden felt nauseous it was due to these.

Now, they are in there for a reason.  I don’t think anyone would choose to have flammable over non flammable goods in their home.  But those flame retardants are slowly wafting throughout your home and into your lungs – and they eventually end up in your body fat.  These are also extremely carcinogenic.

There are many, many others.  But I think you get the point.  There are very high concentrations of chemicals in your home.

More on flame retardants – http://www.cleanandhealthyme.org/BodyofEvidenceReport/TheChemicals/PDBEsToxicFlameRetardants/tabid/97/Default.aspx

The last thing is particles smaller than 2.5 microns.

These could be made up of almost anything – drywall dust, household dust, particles from incomplete combustion, etc… They are dangerous because they have the ability to penetrate deep into the lungs, lodge in there and cause extensive scarring and other problems.

Interestingly, it doesn’t really matter what the particle is made up of – only that it initiates an immune response in the lungs.  Some, like asbestos, are hard to degrade and lead to big problems down the road.  But none of these particles are good for you.

The reaction is similar to have a splinter –redness and swelling, etc…but you can pull these guys out.  So it’s best to avoid them in the first place.

So those are three things that you should watch out for in your indoor air.  It’s time to make sure you are breathing the cleanest air possible.  Because the time to protect your health is when you have it. I’ll resist the urge to spout off a bunch of cliches.

Febreze: Does it Work? How?

November 11th, 2009

Febreze was launched in 1998 as a way to control odours, and was a new way of dealing with them, as air fresheners simply masked scents with perfume.  So is this a good way to go about dealing with less-than-appealing smells within the home?

Let’s take a look…

Background

How cyclodextrin captures odour in Febreze. (click for video)

beta-CD

A molecule of cyclodextrin

Febreze uses cyclodextrins to contain odours.  These are essentially cyclic sugar molecules that look somewhat like donuts.  They have some special properties too;  the outside of the ring is hydrophilic (meaning it loves water) and that makes it soluble in water.  However, the inside is lipophilic (fat loving, the opposite of water loving in terms of solubility) and that means it attracts molecules that won’t dissolve in water.

Cyclodextrins are very widely used to:

  • Remove cholesterol form food
  • Chelate (trap) environmental toxins
  • Chelate fat in diet products
  • Control the release of fragrance (dryer sheets, furniture spraying)
  • Used for controlled drug release

Plus more.  These are very widely used, stable compounds.

The Skinny on Febreze

For a short term cover up, this is actually fine.  For example, if you’re showing your house tomorrow, you might want a quick spray over questionable areas.  Other than that, it’s probably best to stay away.  Here’s why.

The trapping effect of the cyclodextrins only lasts so long.  Sooner or later the bond breaks down (sun, heat, or another energy source) and the offending molecule is released.  It was only bound up for a while.  And the releasing process usually breaks the cyclodextrin down, so it can’t trap another molecule.

Also, that pleasant smell from Febreze will run out.  Sooner or later all the fragrance will be used up, and then whatever you were trying to mask will reappear.   So you have to keep applying it for it to keep working.  This is perfect for Proctor and Gamble, but less than ideal for consumers, because there are chemicals in the mix as well. Cyclodextrins on their own are OK, but I think most would agree that willfully adding to you chemical exposure week in and week out is not a wise idea.

So What Can You Do?

First, keep your humidity down.  Maybe not nose bleed dry, but below 50% relative humidity.  If you have a point source of odour, clean it, repair it, or do whatever you must to get rid of it.

Also, get an air purifier.  These break down chemicals in a safe manner, and make your home smell better to boot.

It may be a little more elbow grease than the odd Febreze spraying, but so much more worth it.

Many thanks to the cyclodextrin definition on Wikipedia for the image,  and to Science in the Box for the cyclodextrin video.

The Monsters in Your Home

August 12th, 2009

Today we’re going to talk about indoor air quality.

Poor indoor air quality is a very real threat to our health these days.  In Canada, we spend over 90% of our time indoors, and you’d think we might be more particular about the quality of the air we breathe.  But alas, we’ll put more effort into making sure the toppings on our pizza are correct than ensuring our supply of the resource we consume the most is clean.  Ok, that was a bit wordy but you get my drift.

The threats come from 2 main sources;

1) Chemicals

2) Bioaerosols

First, lets talk about chemicals.  There are many chemicals that are universally found these days in homes.  Probably the most common is formaldehyde, otherwise known as embalming fluid.  It’s a preservative used in bascially anything manufactured to  – you guessed it  – preserve it.  Insects and rodents will not knaw at anything covered in formaldehyde…cuz they know it’s poison.  Did I mention it’s a potent carcinogen?

There are many others, including benzene (manufacturing residue), ammonia (cleaning supplies), fluorine residues (teflon) and many others.  Most are known carcinogens, and the ones that aren’t usually just don’t have enough research to prove it.

Next comes the biologicals. I could go into much detail here, but for a really excellent and informative 17 page read, go to this indoor air quality report by the American Society for Microbiology.  It’s actually 20 pages, but 3 of those pages are the cover, etc…