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Removal of complexed heavy metals from waste effluents

Patent ·
OSTI ID:6176640
;

A waste solution containing heavy metals tightly bound by complexing agents such as EDTA, NTA, and thiosulfate is treated by contacting the solution with a mixture of peroxide and ozone to oxidize and destroy the complexing agents thereby facilitating separation and recovery of the heavy metals and reducing pollution of streams by the heavy metals.

Assignee:
Pca International Inc
Patent Number(s):
US 4332687
OSTI ID:
6176640
Country of Publication:
United States
Language:
English

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Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
ALKALI METAL COMPOUNDS
AMINO ACIDS
CADMIUM
CARBOXYLIC ACIDS
CHALCOGENIDES
CHELATING AGENTS
CHEMICAL REACTIONS
COMPLEXES
CONTROL
EDTA
ELEMENTS
HYDROGEN COMPOUNDS
IRON
LEAD
LIQUID WASTES
MANAGEMENT
METALS
NTA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN COMPOUNDS
OZONE
PEROXIDES
PHOTOGRAPHY
POLLUTION CONTROL
PRECIPITATION
PROCESSING
RECOVERY
SEPARATION PROCESSES
SILVER
SODIUM COMPOUNDS
SODIUM SULFIDES
SULFIDES
SULFUR COMPOUNDS
THIOSULFATES
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER