Published May 29, 1998 | Version v1
Patent Metadata-only

Processing method of chemical decontamination liquid wastes

Creators

Description

A method of processing spent chemical decontamination liquid wastes containing an aminocarboxylic acid type chelating agent comprises a combination of a step of decomposing the chelating agent in the decontamination liquid wastes to gaseous carbon dioxide, water and an ammonium ion, a step of separating the ammonium ion and a step of neutralizing and solidifying the decontamination liquid wastes from which the ammonium ion is separated and removed. The decomposition is conducted by using an oxidizing means such as anodic oxidation, irradiation of UV rays, ozone or sodium peroxide. The ammonium ion is separated from the decontamination liquid wastes by an electrolytic (electric) dialysis method. Decomposition of EDTA and separation/removal of the ammonium ion as a decomposed product can be conducted simultaneously by the electrolytic dialysis. (N.H.)

Availability note (English)

Available from JAPIO. Also available from EPO.

Additional details

Publishing Information

Imprint Pagination
9 p.
IPC:
Int. Cl. G21F9/28; C02F1/28; C02F1/42; C02F1/469; C02F1/78; G21F9/12
IPC
Int. Cl. G21F9/28; C02F1/28; C02F1/42; C02F1/469; C02F1/78; G21F9/12
Patent number
JP patent document 10-142395/A/

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
29053670
Subject category
S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
AMINO ACIDS; CARBON DIOXIDE; CHELATING AGENTS; DECONTAMINATION; DISSOLUTION; EDTA; ELECTRODIALYSIS; SOLIDIFICATION; SPENT LIQUORS; ULTRAVIOLET RADIATION
Descriptors DEC
AMINO ACIDS; CARBON COMPOUNDS; CARBON OXIDES; CARBOXYLIC ACIDS; CHALCOGENIDES; CHELATING AGENTS; CLEANING; DIALYSIS; ELECTROMAGNETIC RADIATION; INDUSTRIAL WASTES; LIQUID WASTES; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; SEPARATION PROCESSES; WASTES

Optional Information

Secondary number(s)
JP patent application 8-296701