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Toxic Air Emissions From Outdoor Wood Fired Boilers

In addition to smoke and particulate matter, it is very likely that   outdoor wood fired boilers are strong sources of many persistent   toxic substances, including several that are important health   concern in the Great Lakes basin. Such emissions could be   particularly toxic if household waste is also burnt in these units,   which has been suggested to be a common practice. Unfortunately, the   Great Lakes states represent approximately 8 % of the overall sales   of these units and the rate of sales has been growing at an   extremely fast pace over the past decade. It is therefore important   to provide public health and natural resource protection officials   within the Great Lakes region accurate and appropriate information   regarding the levels of persistent toxic substances from these   units. This project will use a controlled laboratory setting to   examine the persistent toxic substance emissions from outdoor wood-  fired boilers. The information will lead to an assessment of the   relative importance of burning of wood and/or household trash in   these units as a source of toxic substances in the Great Lakes.    The study will examine the emissions of polychlorinated dibenzo-  dioxins and furans (PCDD/Fs) and polycyclic aromatic hydrocarbons   (PAH). PCDD/Fs are a class of highly persistent and toxic compounds   formed from a wide range of combustion processes. Emissions of these   compounds are particularly elevated when plastics are burned in   combination with other materials. PAH are another class of toxic   compounds emitted by combustion processes. Several of these   compounds are found in elevated levels in sediments of the Great   Lakes. Wood combustion is an important source of PAH emissions and   the relatively uncontrolled emissions taking place in outdoor wood-  fired boilers may be particularly high in these emissions. Other   compounds may also be studied based on the findings of initial tests   that will look for evidence of certain compounds.     (toxic substances); (toxic substance); (toxic chemicals); (toxic   chemical); (wood fired boiler); (wood fired boilers); (air   pollutants); (air pollutant); (air pollution); (polychlorinated   dibenzo-dioxins); (PCDD's); (PCDDs); (PCDD); (furan); (furans);   (polycyclic aromatic hydrocarbons); (polycyclic aromatic hydrocarbon)  

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Laboratory Investigation
Scale of Phenomena
Biochemical
Physical/Chemical
Impact of Pollutants
Toxic Organics
Annex Numbers
Airborne Toxic Substances
Contaminated Sediment
Persistent Toxic Substances
Research & Development
Specific Objectives for toxic substances and effluents
Annex 17
Physical and transformational processes affecting delivery of pollutants
General
Annex
  • Annex Numbers
    Annex Numbers
    Airborne Toxic Substances
    Contaminated Sediment
    Persistent Toxic Substances
    Research & Development
    Specific Objectives for toxic substances and effluents
  • Annex 17
    Annex 17
    Physical and transformational processes affecting delivery of pollutants

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Great Lakes - St. Lawrence Region.