EP0018923A1 - Verfahren zum Dekontaminieren von Ruthenium enthaltenden flüssigen radioaktiven Abfällen - Google Patents
Verfahren zum Dekontaminieren von Ruthenium enthaltenden flüssigen radioaktiven Abfällen Download PDFInfo
- Publication number
- EP0018923A1 EP0018923A1 EP80400616A EP80400616A EP0018923A1 EP 0018923 A1 EP0018923 A1 EP 0018923A1 EP 80400616 A EP80400616 A EP 80400616A EP 80400616 A EP80400616 A EP 80400616A EP 0018923 A1 EP0018923 A1 EP 0018923A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- effluent
- ruthenium
- iron
- contact
- cupric ions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
Definitions
- the present invention relates to a ruthenium decontamination process for radioactive effluents usable for raw effluents or for effluents subjected beforehand to chemical decontamination treatments of conventional type.
- radioactive effluents such as solutions originating from the treatment of irradiated fuels can be subjected to various chemical decontamination treatments making it possible in particular to remove ruthenium.
- Most of these treatments consist of forming precipitates capable of fixing ruthenium within the effluent to be treated, for example by adding ferrous ions and cupric ions to this effluent and then alkalizing the medium to precipitate the corresponding compounds. of iron and copper.
- the present invention specifically relates to a ruthenium decontamination process for liquid radioactive effluents which in particular makes it possible to improve the ruthenium decontamination rate of effluents treated beforehand by chemical methods of conventional type.
- the process of the invention advantageously takes advantage of the fact that by bringing an effluent containing Cu 2+ ions with iron, according to the following reaction scheme: j a copper deposit which entails most of the ruthenium, this copper deposit being accompanied by partial dissolution of the iron in the effluent in the state of ferrous iron.
- the decontamination rate of the ruthenium effluent can be further improved by then adjusting the pH of the effluent to a value greater than 8 to precipitate the iron that has gone into solution, which makes it possible to fix- on the precipitate of iron hydroxide an additional quantity of ruthenium.
- the quantity of cupric ions added to said effluent is from 50 to 100 mg of Cu 2+ ions per liter of effluent
- said effluent containing the cupric ions is brought into contact with a molar quantity of iron greater than the molar quantity of cupric ions added to said effluent.
- the quantity of iron used corresponds to approximately 500 mg of iron per liter of effluent.
- the process of the invention has the particular advantage of leading to a satisfactory decontamination rate and moreover of avoiding the formation of large volumes of precipitates and sludge which must then be stored.
- a radioactive effluent from a reprocessing plant for irradiated nuclear fuels is treated according to the method of the invention, this effluent having been treated beforehand by chemical means.
- cupric sulphate is added to the effluent so as to introduce approximately 100 mg of cupric ions per liter of effluent.
- pH of the effluent was adjusted to a value of 3 by addition of nitric acid in order to avoid precipitation of the cupric ions in the form of cupric hydroxide.
- the effluent After stabilization of the pH, the effluent is brought into contact with iron powder, the amount of iron used being 500 mg per liter of effluent, by subjecting the whole to stirring for a few minutes in a contactor of conventional type. , which makes it possible to obtain according to the following reaction scheme: a copper deposit and the partial solution of iron in the ferrous state.
- a quantity of sodium hydroxide sufficient to bring the pH to a value substantially equal to 8.5 is then added to the effluent, which leads to the precipitation of the iron passed into solution, and provides additional decontamination in ruthenium because the ruthenium binds on the iron precipitate thus formed.
- the liquid effluent is separated from the sludge formed, for example by decantation.
- the volume of sludge formed represents 1.5% of the volume of the treated effluent.
- the FD decontamination rate of the ruthenium effluent which corresponds to the ratio between the ruthenium activities of the effluent before and after decontamination treatment is of the order of 8.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7911470 | 1979-05-07 | ||
FR7911470A FR2456372A1 (fr) | 1979-05-07 | 1979-05-07 | Procede de decontamination en ruthenium d'effluents radio-actifs liquides |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0018923A1 true EP0018923A1 (de) | 1980-11-12 |
EP0018923B1 EP0018923B1 (de) | 1983-09-21 |
Family
ID=9225134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP80400616A Expired EP0018923B1 (de) | 1979-05-07 | 1980-05-06 | Verfahren zum Dekontaminieren von Ruthenium enthaltenden flüssigen radioaktiven Abfällen |
Country Status (5)
Country | Link |
---|---|
US (1) | US4331551A (de) |
EP (1) | EP0018923B1 (de) |
JP (1) | JPS5619499A (de) |
DE (1) | DE3064890D1 (de) |
FR (1) | FR2456372A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60161598A (ja) * | 1983-12-15 | 1985-08-23 | 日本原子力研究所 | 放射性ルテニウムを含む放射性廃液の処理方法 |
JPS60196700A (ja) * | 1984-03-21 | 1985-10-05 | 株式会社日立製作所 | 放射性廃液中の放射能除去方法 |
JPH06300042A (ja) * | 1993-04-13 | 1994-10-25 | Nippon Seiko Kk | 静圧気体軸受 |
WO2000029501A1 (en) * | 1998-11-18 | 2000-05-25 | Emory University | Radioactive coating solutions, methods, and substrates |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2124126A1 (de) * | 1971-02-08 | 1972-09-22 | Commissariat Energie Atomique |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2792412A (en) * | 1954-03-04 | 1957-05-14 | Harold R Schmidt | Recovery of ruthenium from aqueous solutions |
-
1979
- 1979-05-07 FR FR7911470A patent/FR2456372A1/fr active Granted
-
1980
- 1980-04-29 US US06/144,911 patent/US4331551A/en not_active Expired - Lifetime
- 1980-05-06 DE DE8080400616T patent/DE3064890D1/de not_active Expired
- 1980-05-06 EP EP80400616A patent/EP0018923B1/de not_active Expired
- 1980-05-07 JP JP6046280A patent/JPS5619499A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2124126A1 (de) * | 1971-02-08 | 1972-09-22 | Commissariat Energie Atomique |
Non-Patent Citations (1)
Title |
---|
CHEMICAL ABSTRACTS, Vol. 84, No. 12, 22 Mars 1976 ref. 79402y, page 369 Colombus Ohio, US & JP-A-50 140799 (EBARA MFG CO LTD)(12-11-1975). * |
Also Published As
Publication number | Publication date |
---|---|
EP0018923B1 (de) | 1983-09-21 |
FR2456372A1 (fr) | 1980-12-05 |
DE3064890D1 (en) | 1983-10-27 |
US4331551A (en) | 1982-05-25 |
JPS5619499A (en) | 1981-02-24 |
FR2456372B1 (de) | 1981-08-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7476333B2 (en) | Composition and method for reducing chemical oxygen demand in water | |
US20090194486A1 (en) | Composition and method for reducing chemical oxygen demand in water | |
US4419246A (en) | Removal of heavy metal ions | |
EP0039819B1 (de) | Verfahren zur Behandlung von Kupfer-Ionen und einen organischen Komplex enthaltenden Abwässern | |
FR2557141A1 (fr) | Procede d'obtention de metaux precieux | |
CN109850952B (zh) | 一种含重金属离子水溶液中铁离子的高纯分离方法 | |
US4846978A (en) | Recovery of metals from solutions containing chelants | |
US4481112A (en) | Process of treating gas condensate | |
US4250030A (en) | Process for the removal of cyanides from effluent | |
EP0018923B1 (de) | Verfahren zum Dekontaminieren von Ruthenium enthaltenden flüssigen radioaktiven Abfällen | |
US4416779A (en) | Method for producing an aqueous solution of high phosphorous content | |
US3770423A (en) | Process for removing dissolved lead compounds from aqueous media | |
EP0595861A1 (de) | Verfahren zur herstellung einer wassrigen losung von natriumchlorid | |
US5306336A (en) | Sulfate-free electroless copper plating baths | |
JPS5815193B2 (ja) | ホウ素含有水の処理方法 | |
JPS6097091A (ja) | フツ化物イオン含有水の処理方法 | |
JP2018202270A (ja) | 薬剤及びセレン含有排水の処理方法 | |
FR2667327A1 (fr) | Procede d'epuration de solutions de phosphate d'alkyle dans un solvant organique hydrophobe. | |
FR2599885A1 (fr) | Procede pour enlever une espece radioactive contaminante d'une surface d'un composant solide et pour traiter l'effluent liquide obtenu | |
JP5828675B2 (ja) | シアン含有廃液の処理方法およびこれに使用する薬剤 | |
EP0498743B1 (de) | Verfahren zur Entfernung von Ruthenium aus Uran enthaltenden Lösungen | |
SU1309914A3 (ru) | Способ извлечени из водных растворов цветных и/или бллагородных металлов | |
JP2002518590A (ja) | エチレン−ジアミン−ジコハク酸(edds)錯体の使用による残留物からの重金属の分離方法 | |
SU1629336A1 (ru) | Способ очистки сульфатного цинкового раствора от хлора | |
JP2001079570A (ja) | 無電解ニッケルメッキ廃液の処理方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): BE DE GB |
|
17P | Request for examination filed |
Effective date: 19810415 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Designated state(s): BE DE GB |
|
REF | Corresponds to: |
Ref document number: 3064890 Country of ref document: DE Date of ref document: 19831027 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Effective date: 19840531 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
BERE | Be: lapsed |
Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE ETABLISSEMENT D Effective date: 19840506 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19850201 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Effective date: 19881118 |