Dear Andrew Don't deep mined coals have elevated concentrations of everything?
As to what comes out in a fire I leave that to Prof Lodoysamba who watches the elements floating around Ulaanbaatar better than anyone. Some metals can be evaporated and some cannot. He expressed a concern about the sudden and quite dramatic increase in cadmium this past winter for the first time, the root cause of which is still unknown. There is a lot of salt in the air. Overall PM is down 30% some say. That is related to the improved coal stove programme. Not bad for a single year in city of over a million residents. Mercury and uranium levels are very low - always were. Radiation from standing outside is 'baseline' (from GCR's) while radiation from being inside a concrete building is about 1.5 times background. Radiation from the smiles of the local people is of course, intense. Regards Crispin +++++++++++ >While >there is often a knee-jerk complaint about 'coal contains mercury' >there is mercury in all soil, so we expect it in coal. There are good reasons why deep mined coal seams will have elevated amounts of heavy metals concentrated in them. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://stoves.bioenergylists.org/
