Abstract
The Salmonella mutagenicity assay and chemical analyses were used to evaluate the emissions from the open burning of scrap rubber tires that had been cut into either of two sizes, CHUNK or SHRED. A wide variety of polycyclic aromatic hydrocarbons was detected in the particulate organics. The mutagenic emission factor for the open burning of scrap rubber tires (approx. 8 x 10 to the power 7 revertants/kg of tire burned) was 3-4 orders of magnitude greater than the values for the combustion of oil, coal, or wood in utility boilers; it was most similar to values for the open burning of wood or plastic. These results demonstrate for the first time that the open burning of scrap rubber tires produces a high mutagenic emission factor, posing potential environmental and health effects. (A)
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