PROCESSO PARA A PRODUCAO DE SULFURETO DE HIDROGENIO A PARTIR DE ENXOFRE ELEMENTAR E A SUA UTILIZACAO NA RECUPERACAO DE METAIS PESADOS

摘要

A process was found for the conversion of elemental sulphur to hydrogen sulphide under ambient temperature and pressure. The biological hydrogen sulphide production process described is less expensive than both the chemical production of hydrogen sulphide and the biological hydrogen sulphide production from diluted sulphate containing waste water streams. Except for economical benefits also safety advantages exist compared to the chemical production of hydrogen sulphide, which is achieved at elevated temperature and pressure. The hydrogen sulphide produced can be used for the recovery of heavy metals.