TheRecord.com, Kitchener, Ontario, Canada

French authorities confine thousands indoors over sulphur leak

March 21, 2009
The Associated Press
Web edition

LILLE, France — Authorities warned some 80,000 people in northern France to stay home and close their windows and doors for nearly five hours Saturday after a large cloud of sulphur leaked from a chemicals factory….

Dozens of rescuers and chemicals teams fanned out near the chemicals factory in an industrial suburb of Dunkirk where a fire broke out around 5 am.

The alert was called off nearly six hours later. The site converts liquid sulphur into a solid….([1] Full Story)

Update 2009 03 22, 10:30 hrs:   According to this Reuters article (in French), “[2] Pollution au soufre à Dunkerque après un incendie” , in L’EXPRESS, 2009 03 21, “Sulphur in suspension is not toxic and does not present a danger to health, but it is irritating, specifies the prefecture.”

That statement is technically correct although very questionable in the context of the Dunkirk sulphur fire.  The cloud of pollution was not a sulphur cloud.  It was a cloud of sulphur dioxide gas, [3] a gas that is deadly in relatively low concentrations.

Anyway, is is not clear from any of the reports on the Dunkirk sulphur fire how much sulphur actually burned and how much sulphur dioxide was produced by the fire. Although the article in L’EXPRESS stated that 250 tonnes of sulphur in storage had been ignited, none of the media reports stated how much sulphur had been consumed in the fire.  Just for the record, when burning, one tonne of sulphur produces three tonnes of deadly sulphur-dioxide gas.

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[4] More about sulphur fires (some with catastrophic and deadly consequences)