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Hydrogen sulfide is often produced from the microbial breakdown of organic matter in the absence of oxygen, such as in swamps and sewers; this process is commonly known as anaerobic digestion, which is done by sulfate-reducing microorganisms. It also occurs in volcanic gases, natural gas deposits, and sometimes in well-drawn water.
Hydrogen sulfide production depends on various physicochemical, topographic, and hydraulic parameters [6] such as: Sewage oxygen concentration. The threshold is 0.1 mg/l; above this value, sulfides produced in sludge and sediments are oxidized by oxygen; below this value, sulfides are emitted in the gaseous phase. Temperature.
However, some prokaryotes like bacteria can survive in a heavy hydrogen environment. Heavy water can be toxic to humans, but a large amount would be needed for poisoning to occur. The most cost-effective process for producing heavy water is the Girdler sulfide process. Heavy water is used in various industries and is sold in different grades of ...
Treatment of sulfur with hydrogen gives hydrogen sulfide.When dissolved in water, hydrogen sulfide is mildly acidic: [5] H 2 S ⇌ HS − + H +. Hydrogen sulfide gas and the hydrosulfide anion are extremely toxic to mammals, due to their inhibition of the oxygen-carrying capacity of hemoglobin and certain cytochromes in a manner analogous to cyanide and azide.
A natural-gas processing plant in Aderklaa, Austria. Natural-gas processing is a range of industrial processes designed to purify raw natural gas by removing contaminants such as solids, water, carbon dioxide (CO 2), hydrogen sulfide (H 2 S), mercury and higher molecular mass hydrocarbons to produce pipeline quality dry natural gas [1] for pipeline distribution and final use. [2]
These lakes are thermally stratified; in the spring and summer time, water at the surface is warmed, making it less dense than underlying colder water, which provides sufficiently stable stratification for purple sulfur bacteria growth. If sufficient sulfate is present to support sulfate reduction, the sulfide, produced in the sediments ...
The principal components of volcanic gases are water vapor (H 2 O), carbon dioxide (CO 2), sulfur either as sulfur dioxide (SO 2) (high-temperature volcanic gases) or hydrogen sulfide (H 2 S) (low-temperature volcanic gases), nitrogen, argon, helium, neon, methane, carbon monoxide and hydrogen.
[1] [2] Sulfur springs smell of rotten eggs due to hydrogen sulfide (H 2 S), which is hazardous and sometimes deadly. It is a gas, and it usually enters the body when it is breathed in. [ 3 ] The quantities ingested in drinking water are much lower and are not considered likely to cause harm, but few studies on long-term, low-level exposure ...