Global Patent Index - EP 3807223 A1

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

EP 3807223 A1 20210421 (DE)

Application

EP 19733436 A 20190618

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