MULTIPLE STAGE PRECIPITATION OF HEAVY METALS FROM ACIDIC AQUEOUS SOLUTION

MULTIPLE STAGE PRECIPITATION OF HEAVY METALS FROM ACIDIC AQUEOUS SOLUTION

In the removal of heavy metal contaminants from industrial waste water, the invention provides a method for preparing a dense precipitate having superior handling and disposal properties. The method comprises incremental adjustment of the pH to maintai n a low saturation ratio and recycling of slurr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KONDOS, PETER D, DEMOPOULOS, GEORGE P, ZINCK, JANICE M
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:In the removal of heavy metal contaminants from industrial waste water, the invention provides a method for preparing a dense precipitate having superior handling and disposal properties. The method comprises incremental adjustment of the pH to maintai n a low saturation ratio and recycling of slurry to provide seed crystals for second ary nucleation.