Volatile hydrocarbons from domestic wood burning

Research studies on wood smoke and other air pollution.

Volatile hydrocarbons from domestic wood burning

Postby Wilberforce » Sat May 01, 2010 1:05 pm

Volatile hydrocarbons from domestic wood burning
Gunnar Barrefors and Göran Petersson*
http://www.sciencedirect.com/science/ar ... 359500048D
Abstract

The quantitative proportions of 16 alkenes, 5 alkadienes, 5 alkynes and several alkanes and arenes were determined in emissions from wood burning in a wood-stove and in small-scale model experiments. Samples were taken on triple-layer adsorption cartridges, and gas chromatographic separations were performed on an aluminium oxide column.

Ethene, ethyne and benzene were major components, especially from efficient flame combustion. The proportions of C3---C7 alkenes were markedly higher for smouldering. The carcinogenic compounds benzene and 1,3-butadiene constituted roughly 10–20% and 1–2% by weight of total non-methane hydrocarbons. Similar results were obtained for hardwood and softwood.


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Benzene emitted from glowing charcoal
Maria Olsson, Göran Petersson
http://www.sciencedirect.com/science/ar ... 9702004035
Abstract

Benzene was assessed as the predominant aromatic compound emitted from glowing charcoal and firewood embers. Concentrations measured above charcoal used for grilling exceeded 10 mg m−3 at a 5% carbon dioxide level. Charcoal with a high carbon content released less benzene. Glowing wood pellets emitted less benzene than glowing firewood remainders. The emissions of ethene and propene relative to benzene were low for commercial charcoal and wood-pellet embers, but high for firewood ember. The proportions of methylbenzene and naphthalene from charcoal were typically only 10% relative to benzene, and those of benzofuran, dibenzofuran and benzonitrile were typically below 5%. The polycyclic aromatic hydrocarbon (PAH) indicator phenanthrene was below the 1% level. Adsorbent sampling and GC-MS were used for assessing all the aromatic compounds. Earlier studies of charcoal emissions have focused on carbon monoxide, PAH and dioxins. It is concluded that the carcinogenic benzene may be an even more severe health hazard to be addressed by exposure-decreasing measures.

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• The Surgeon General has determined that there is no safe level of exposure to ambient smoke!

• If you smell even a subtle odor of smoke, you are being exposed to poisonous and carcinogenic chemical compounds!

• Even a brief exposure to smoke raises blood pressure, (no matter what your state of health) and can cause blood clotting, stroke, or heart attack in vulnerable people. Even children experience elevated blood pressure when exposed to smoke!

• Since smoke drastically weakens the lungs' immune system, avoiding smoke is one of the best ways to prevent colds, flu, bronchitis, or risk of an even more serious respiratory illness, such as pneumonia or tuberculosis! Does your child have the flu? Chances are they have been exposed to ambient smoke!
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Re: Volatile hydrocarbons from domestic wood burning

Postby pm2.5mary » Wed May 05, 2010 10:56 pm

Wow,

Great finds! Thanks Woodnyet!
M
"Particulate pollution is the most important contaminant in our air. ...we know that when particle levels go up, people die. " (Joel Schwartz, Ph.D., Harvard School of Public Health, E Magazine, Sept./Oct. 2002)
Find more at http://burningissues.org
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