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Do EPA certified stoves emit more dioxins/furans?

PostPosted: Sat Nov 10, 2007 5:05 pm
by CaptainAir
Hi,

Interesting, the things you will find with a little research for a project...
http://www.state.nj.us/dep/airworkgroups/docs/hr/hr_study_woodburning_woodstoves.pdf

EPA certified stoves produce more dioxins/furans when using maple than conventional stoves when using spruce!
These compounds are highly carcinogenic and they accumulate in the environment climbing back up the food chain.

http://www.hc-sc.gc.ca/iyh-vsv/environ/dioxin_e.html

I just stumbled across this while I was finishing my research…
Anyone has ever heard about this Canadian study?
This seems to be the only copy on the Web... I wonder why?

CaptainAir

PostPosted: Sat Nov 10, 2007 7:03 pm
by bodhi
an interesting table concerning dioxins:

Source Annual dioxin emissions
g TEQ/year

Municipal solid waste incineration 1100
Secondary copper smelting 541
Medical waste incineration 477
Forest fires 208
Cement kilns burning hazardous waste 153
Utility/industrial coal combustion 73
Residential wood burning 63
On-road diesel fuel combustion 34
Industrial wood burning 29
Cement kilns not burning hazardous waste 18
Secondary aluminum smelting 17
Utility/industrial oil combustion 9
On-road unleaded gas fuel combustion 6
Sewage sludge incineration 6
Hazardous waste incineration 6
Kraft black liquor Boilers 2
Secondary lead smelting 2
Total 2,745


As can be seen from this list, municipal waste incineration, secondary copper smelting, and medical waste incineration dominate the total emissions of dioxins to the air. Surprisingly, forest fires and residential wood burning produce a substantial amount of the estimated dioxin emissions. Hazard waste incineration contributes about 0.2% of the annual estimated dioxins emissions to the atmosphere.

http://www.crwi.org/textfiles/diox.htm

re Canadian Study

PostPosted: Fri Oct 24, 2008 10:17 pm
by Smokelessinvancouver
Very interesting. i will pass it along.

re Canadian Studies

PostPosted: Fri Oct 24, 2008 10:37 pm
by Smokelessinvancouver
What did you come away with from these 2 studies??

PostPosted: Sat Oct 25, 2008 6:50 am
by turning_blue
Smokelessinvancouver,

I am so glad you bumped this thread! I was just asking about this last night!
How do I explain that there are more dioxin and furans in EPA wood stove emissions? How do I explain that they are produced when wood is being burned. How does the chlorine fit in to this? Someone argued with me and said there must be chlorine. I see chlorine in the article but I don't know how to prove the point since I am not a scientist.

I could print these out for this person.

PostPosted: Sat Oct 25, 2008 10:20 am
by Wilberforce
Chlorine, chlorine oxides, and chlorinated dioxins can be generated
from the combustion of certain plastics (like PVC pipe, wire insulation,
etc) This is most likely to come from commercial incinerators and
home burn-barrels. (Google 'burn barrel')

It is thought that burning of sea driftwood may also generate
these compounds (due to the salt content) but I have not been able
to find any research studies confirming this. If someone would like
to sleuth for this information, please do so.