Assertion: hydrogen sulfide | /r/CapableOf | use the sulphate method
Facets:
value: in coal mines
type: LOCATION
Source sentences:
text: Hydrogen sulfide can also result from industrial activities, such as food processing, sewage treatment, coke ovens, paper mills (using the sulphate method), tanneries, and petroleum refineries, in coal mines (as iron sulfides such as pyrite decompose) and anywhere where sulfur comes in contact with organic material at high temperatures.