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Archive for February, 2012

Dioxins in cement kiln emissions

Thursday, February 16th, 2012

Drs. Stephen G. Zemba and Laura C. Green of Cambridge Environmental recently published a paper entitled, “Polychlorinated dibenzo(p)dioxin and furan (PCDD/F) congener profiles in cement kiln emissions and impacts.”  This study examined the patterns of dioxin emissions in stack-tests at two Portland cement kilns that use a variety of fuels, including petroleum coke, coal, various supplemental fuels, and refinery distillation ends.  All of the kiln emission profiles were found to differ markedly from profiles in ambient air.  However, the small absolute dioxin emission rates from the kilns suggested that kiln impacts would not be detectable via ambient air monitoring, even in rural settings.