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Title: Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering

Abstract

In processes of this invention aqueous waste solutions containing a variety of mixed waste contaminants are treated to remove the contaminants by a sequential addition of chemicals and adsorption/ion exchange powdered materials to remove the contaminants including lead, cadmium, uranium, cesium-137, strontium-85/90, trichloroethylene and benzene, and impurities including iron and calcium. Staged conditioning of the waste solution produces a polydisperse system of size enlarged complexes of the contaminants in three distinct configurations: water-soluble metal complexes, insoluble metal precipitation complexes, and contaminant-bearing particles of ion exchange and adsorbent materials. The volume of the waste is reduced by separation of the polydisperse system by cross-flow microfiltration, followed by low-temperature evaporation and/or filter pressing. The water produced as filtrate is discharged if it meets a specified target water quality, or else the filtrate is recycled until the target is achieved. 1 fig.

Inventors:
; ;
Issue Date:
OSTI Identifier:
6898167
Patent Number(s):
5366634 A
Application Number:
PPN: US 7-935328
Assignee:
Dept. of Energy, Washington, DC (United States)
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 26 Aug 1992
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; BENZENE; REMOVAL; CADMIUM; CALCIUM; CESIUM; CHLORINATED ALIPHATIC HYDROCARBONS; IRON; LEAD; STRONTIUM; URANIUM; WASTE WATER; RADIOACTIVE WASTE PROCESSING; WATER TREATMENT; SEPARATION PROCESSES; ACTINIDES; ALKALI METALS; ALKALINE EARTH METALS; AROMATICS; ELEMENTS; HALOGENATED ALIPHATIC HYDROCARBONS; HYDROCARBONS; HYDROGEN COMPOUNDS; LIQUID WASTES; MANAGEMENT; METALS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; OXYGEN COMPOUNDS; PROCESSING; RADIOACTIVE WASTE MANAGEMENT; TRANSITION ELEMENTS; WASTE MANAGEMENT; WASTE PROCESSING; WASTES; WATER; 052001* - Nuclear Fuels- Waste Processing; 540220 - Environment, Terrestrial- Chemicals Monitoring & Transport- (1990-); 540230 - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (1990-)

Citation Formats

Vijayan, S, Wong, C F, and Buckley, L P. Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering. United States: N. p., 1994. Web.
Vijayan, S, Wong, C F, & Buckley, L P. Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering. United States.
Vijayan, S, Wong, C F, and Buckley, L P. Tue . "Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering". United States.
@article{osti_6898167,
title = {Waste treatment process for removal of contaminants from aqueous, mixed-waste solutions using sequential chemical treatment and crossflow microfiltration, followed by dewatering},
author = {Vijayan, S and Wong, C F and Buckley, L P},
abstractNote = {In processes of this invention aqueous waste solutions containing a variety of mixed waste contaminants are treated to remove the contaminants by a sequential addition of chemicals and adsorption/ion exchange powdered materials to remove the contaminants including lead, cadmium, uranium, cesium-137, strontium-85/90, trichloroethylene and benzene, and impurities including iron and calcium. Staged conditioning of the waste solution produces a polydisperse system of size enlarged complexes of the contaminants in three distinct configurations: water-soluble metal complexes, insoluble metal precipitation complexes, and contaminant-bearing particles of ion exchange and adsorbent materials. The volume of the waste is reduced by separation of the polydisperse system by cross-flow microfiltration, followed by low-temperature evaporation and/or filter pressing. The water produced as filtrate is discharged if it meets a specified target water quality, or else the filtrate is recycled until the target is achieved. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {11}
}