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Many metal sulfides are so insoluble in water that they are probably not very toxic. Some metal sulfides, when exposed to a strong mineral acid, including gastric acids, will release toxic hydrogen sulfide. Organic sulfides are highly flammable. When a sulfide burns it produces sulfur dioxide (SO 2) gas.
A hydrogen sulfide bloom (green) stretching for about 150km along the coast of Namibia. As oxygen-poor water reaches the coast, bacteria in the organic-matter rich sediment produce hydrogen sulfide, which is toxic to fish. Hydrogen sulfide has been implicated in several mass extinctions that have occurred in the
This may be due to the use of well water, poorly treated city water, or water heater contamination. Various methods exist to treat sulfur in water. These methods include Filtration of the water using a carbon filter (useful for very small amounts of hydrogen sulfide) Filtration of the water through a canister of manganese oxide coated greensand
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.
This results in the byproduct of hydrogen sulfide (H 2 S), a chemical toxic to most biota and responsible for the characteristic "rotten egg" smell and dark black sediment color: [12] [13] 2 CH 2 O + SO 2−
For over a century, public water systems have used chemical compounds to kill pathogens that cause waterborne diseases such as cholera. 'Unidentified product' found in US tap water could be toxic ...
The International Bottled Water Association has adopted a tougher standard for its members: 5 parts per trillion for one PFAS compound and 10 parts per trillion for more than one compound.
The plan would limit toxic PFAS chemicals to the lowest level that tests can detect. PFAS, or per- and polyfluorinated substances, are a group of compounds that are widespread, dangerous and ...
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