EP 3807223 A1 20210421 - METHOD FOR REMOVING RADIOACTIVE IODIDE FROM WASTEWATER
Title (en)
METHOD FOR REMOVING RADIOACTIVE IODIDE FROM WASTEWATER
Title (de)
METHODE ZUR ENTFERNUNG VON RADIOAKTIVEM JODID AUS ABWÄSSERN
Title (fr)
PROCÉDÉS POUR ÉLIMINER L'IODURE RADIOACTIF CONTENU DANS DES EAUX USÉES
Publication
Application
Priority
- CH 7662018 A 20180618
- EP 2019066023 W 20190618
Abstract (en)
[origin: WO2019243338A1] The invention relates to a method for reducing the iodide content in aqueous systems, particularly to a method for purifying hospital wastewater created in connection with radiochemistry, diagnostics and therapy. Radioactive iodide is removed from wastewater in that it is precipitated by an excess of silver or copper ions. The remaining heavy metal ions are removed from the wastewater in a second step by precipitation using a halide salt. The treated wastewater thus contains reduced radioactive contamination and a low content of heavy metals and can be discharged to public wastewater systems.
IPC 8 full level
C02F 1/38 (2006.01); C02F 1/52 (2006.01); C02F 1/56 (2006.01); C02F 1/66 (2006.01); C02F 1/70 (2006.01); C02F 11/121 (2019.01); G21F 9/10 (2006.01)
CPC (source: CH EP US)
C02F 1/5236 (2013.01 - EP US); C02F 1/58 (2013.01 - CH); C02F 1/705 (2013.01 - EP); G21F 9/10 (2013.01 - CH EP); C02F 1/001 (2013.01 - EP); C02F 1/38 (2013.01 - EP); C02F 1/56 (2013.01 - EP); C02F 1/66 (2013.01 - EP); C02F 2001/007 (2013.01 - EP); C02F 2101/006 (2013.01 - EP); C02F 2103/003 (2013.01 - EP); C02F 2209/02 (2013.01 - EP); C02F 2209/06 (2013.01 - EP); C02F 2209/09 (2013.01 - EP); C02F 2301/08 (2013.01 - EP); C02F 2303/18 (2013.01 - EP)
Citation (search report)
See references of WO 2019243338A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2019243338 A1 20191226; CH 715104 A2 20191230; EP 3807223 A1 20210421
DOCDB simple family (application)
EP 2019066023 W 20190618; CH 7662018 A 20180618; EP 19733436 A 20190618