Ecotech - 	ACOEM Group

Hydrogen Sulfide (H2S) monitoring

Hydrogen sulfide is the chemical compound with the formula H2S. H2S is colorless, toxic and flammable and is responsible for the foul odour of rotten eggs and flatulence. Hydrogen sulfide often results from sulfur reducing bacteria in nonorganic matter (in the absence of oxygen), such as in swamps and sewers (anaerobic digestion). H2S also occurs in volcanic gases, natural gas and some well waters.

Hydrogen sulfide is also created through industrial processes and released into the atmosphere. The main sources of anthropogenic Hydrogen sulfide (H2S) emissions are from petroleum refineries, paper mills, coke ovens (aluminum, steel, graphite, electrical, and construction industries) and to a smaller extent tannaries.

Hydrogen sulfide is toxic to many different parts of the human body, it effects the nervous system most acutely and also inhibits respiration. General harmful levels of Hydrogen sulfide (H2S) exposure are 5-10 ppm, levels above this begin with eye irritation and lead up to death.