A process for recovery of hexavalent chromium from waste streams. The
method includes providing a waste stream containing hexavalent chromium,
reacting a soluble non-toxic precipitating reagent with the hexavalent
chromium to form an insoluble precipitating reagent-chromate precipitate,
and recovering the insoluble precipitating reagent-chromate precipitate.
It may optionally include reacting the insoluble precipitating
reagent-chromate precipitate with an acidic solution to form an insoluble
precipitating reagent precipitate and a soluble hexavalent chromium
compound, and recovering the soluble hexavalent chromium compound. The
process may also include reacting the insoluble precipitating reagent
precipitate with a solubilizing reagent to form the soluble non-toxic
precipitating reagent.
Um processo para a recuperação do cromo hexavalent dos córregos waste. O método inclui fornecer um córrego waste que contem o cromo hexavalent, reagindo um reagent non-toxic soluble precipitating com o cromo hexavalent para dar forma a um precipitate insoluble do reagent-cromato precipitating, e recuperar o precipitate insoluble do reagent-cromato precipitating. Pode opcionalmente incluir reagir o precipitate insoluble do reagent-cromato precipitating com uma solução acidic para dar forma a um precipitate insoluble do reagent precipitating e a um composto hexavalent soluble do cromo, e recuperar o composto hexavalent soluble do cromo. O processo pode também incluir reagir o precipitate insoluble do reagent precipitating com um reagent solubilizing para dar forma ao reagent non-toxic soluble precipitating.
