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Sodium meta-bisulfite

Chrome bearing waste water requires pretreatment, since hexavalent chromium will not react with hydroxide. Hexavalent chrome must be reduced to the trivalent form by reaction with ferrous sulfate, sodium meta-bisulfite or sulfur dioxide. The reduction must be carried out at a pH below 3.0. Achieving complete reduction is important, since any remaining hexavalent chromium will remain in solution in the effluent. The pH is then raised to pH... [Pg.655]

See other pages where Sodium meta-bisulfite is mentioned: [Pg.389]    [Pg.88]    [Pg.88]    [Pg.45]    [Pg.821]    [Pg.292]    [Pg.99]    [Pg.389]    [Pg.88]    [Pg.88]    [Pg.45]    [Pg.821]    [Pg.292]    [Pg.99]    [Pg.2244]   
See also in sourсe #XX -- [ Pg.45 ]



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