Removal of dissolved heavy metals from aqueous waste effluents

Details Removal of dissolved heavy metals from aqueous waste effluents Removal of dissolved heavy metals from aqueous waste effluents

1984-05-08

1986-01-21

Metz, Andrew H.

Liquid purification or separation

Processes

Ion exchange or selective sorption

210912, C02F 142

Patent

active

045656339

ABSTRACT:
The invention relates to an environmentally-compatible process for the batchwise or continuous removal of toxic heavy metals from an aqueous effluent such as power plant wastewater. It includes the steps of activation, treating and separation. In the first step, iron in particulate form is contacted with an oxygen-containing gas such as air and an aqueous medium such as the wastewater itself under conditions providing an oxygen-water-iron interface for a period sufficient to react at least a substantial portion of the exposed iron surfaces with the oxygen and water so as to produce active surfaces on the iron particles having enhanced adsorption for the heavy metals. In the second step, without allowing the active adsorptive surfaces to dry, the particles are inundated with the aqueous effluent so as to bring about intimate contact of the aqueous effluent and adsorptive surfaces to effect adsorption of at least a substantial portion of the heavy metals on to the adsorptive surfaces. In the third step, the contacted aqueous effluent having reduced amounts of heavy metal is separated from the iron particles having heavy metals adsorbed thereon. These iron particles may then be charged to an iron or steelmaking process.

REFERENCES:
patent: 3317312 (1967-05-01), Kraus et al.
patent: 3382034 (1968-05-01), Kraus
patent: 3901802 (1975-08-01), Peeters et al.
patent: 4285819 (1981-08-01), Yen et al.
patent: 4377483 (1983-03-01), Yamashita et al.
patent: 4405464 (1983-09-01), Baldwin et al.

Affiliated with

Also associated with

Rating

Removal of dissolved heavy metals from aqueous waste effluents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Removal of dissolved heavy metals from aqueous waste effluents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Removal of dissolved heavy metals from aqueous waste effluents will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2297231