IE41336L - Reducing heavy metals in solution. - Google Patents
Reducing heavy metals in solution.Info
- Publication number
- IE41336L IE41336L IE750946A IE94675A IE41336L IE 41336 L IE41336 L IE 41336L IE 750946 A IE750946 A IE 750946A IE 94675 A IE94675 A IE 94675A IE 41336 L IE41336 L IE 41336L
- Authority
- IE
- Ireland
- Prior art keywords
- waters
- iron
- electropositive
- purification
- solution
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
- C02F1/705—Reduction by metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/467—Foam spreading or levelling devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/58—Moulds
- B29C44/588—Moulds with means for venting, e.g. releasing foaming gas
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/006—Degassing moulding material or draining off gas during moulding
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
- Catalysts (AREA)
Abstract
For the purification of effluents containing heavy metal compounds, these waters are contacted with an element selected from those more electropositive than hydrogen. The reduction reaction must be carried out at a pH less than or equal to 3. The water to be treated is caused to flow through one or more columns filled with the more electropositive element in the form of granules, beads, strips, shavings or any form compatible with the dimensions of said column. If, for example, the waters to be treated contain chromates, the element used is iron. In this case, the exit pH from the reduction system is kept below the value corresponding to that at which the iron is precipitated as hydroxide. In this way, purification of the waters is achieved with a reduced consumption of more electropositive elements, in this example, iron.
[GB1474145A]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT22396/74A IT1010486B (en) | 1974-05-08 | 1974-05-08 | PROCEDURE FOR THE PURIFICATION OF WASTE WATER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE41336L true IE41336L (en) | 1975-11-08 |
| IE41336B1 IE41336B1 (en) | 1979-12-05 |
Family
ID=11195718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE946/75A IE41336B1 (en) | 1974-05-08 | 1975-04-28 | Reducing the contents of heavy metals in solution |
Country Status (23)
| Country | Link |
|---|---|
| JP (1) | JPS50152557A (en) |
| AT (2) | AT346253B (en) |
| BE (1) | BE828570A (en) |
| CH (1) | CH617642A5 (en) |
| CS (1) | CS202546B2 (en) |
| DD (1) | DD118051A5 (en) |
| DE (1) | DE2520531A1 (en) |
| DK (1) | DK196775A (en) |
| ES (1) | ES437875A1 (en) |
| FI (1) | FI751142A (en) |
| FR (1) | FR2270209B1 (en) |
| GB (1) | GB1474145A (en) |
| IE (1) | IE41336B1 (en) |
| IL (1) | IL47073A (en) |
| IT (1) | IT1010486B (en) |
| LU (1) | LU72427A1 (en) |
| NL (1) | NL7505514A (en) |
| NO (1) | NO751626L (en) |
| PL (1) | PL111038B1 (en) |
| RO (1) | RO69366A (en) |
| SE (1) | SE7505290L (en) |
| TR (1) | TR19213A (en) |
| YU (1) | YU103975A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2613128C2 (en) * | 1976-03-27 | 1982-03-04 | Hoechst Ag, 6000 Frankfurt | Process for reducing the mercury content of industrial wastewater |
| DE3321451A1 (en) * | 1982-06-16 | 1983-12-22 | Occidental Chemical Corp., 48089 Warren, Mich. | DEVICE AND METHOD FOR REMOVING COPPERIONS FROM AQUEOUS SOLUTIONS |
| DE3411228C1 (en) * | 1984-03-27 | 1985-05-30 | Du Pont de Nemours (Deutschland) GmbH, 4000 Düsseldorf | Process for the environmentally friendly purification of photographic wash water from film processing machines and apparatus for carrying out the process |
| DE4217987A1 (en) * | 1992-05-30 | 1993-12-02 | Battelle Institut E V | Removal and recovery of heavy metals from earth, sludges and waterways - by amalgamation and sedimentation of esp. mercury@, nickel@ and cobalt@ and their cpds., by addn. of powered zinc@ or aluminium@ |
| EP0660804B1 (en) * | 1992-09-18 | 1997-02-26 | Krüger A/S | Method for the purification of metal-containing aqueous media and method of preparing an adsorbent |
| DE102007045337B4 (en) * | 2007-09-22 | 2021-01-07 | Bayerische Motoren Werke Aktiengesellschaft | Procedure for protection against dust containing chromium (VI) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2177656B1 (en) * | 1972-03-31 | 1979-02-16 | Lewandowski Raymond |
-
1974
- 1974-05-08 IT IT22396/74A patent/IT1010486B/en active
-
1975
- 1975-04-11 IL IL47073A patent/IL47073A/en unknown
- 1975-04-17 FI FI751142A patent/FI751142A/fi not_active Application Discontinuation
- 1975-04-23 YU YU01039/75A patent/YU103975A/en unknown
- 1975-04-25 GB GB1736975A patent/GB1474145A/en not_active Expired
- 1975-04-28 CH CH541075A patent/CH617642A5/en not_active IP Right Cessation
- 1975-04-28 IE IE946/75A patent/IE41336B1/en unknown
- 1975-04-29 BE BE155938A patent/BE828570A/en unknown
- 1975-04-29 TR TR19213A patent/TR19213A/en unknown
- 1975-05-05 CS CS753094A patent/CS202546B2/en unknown
- 1975-05-05 PL PL1975180173A patent/PL111038B1/en unknown
- 1975-05-05 DK DK196775A patent/DK196775A/en unknown
- 1975-05-05 RO RO7582142A patent/RO69366A/en unknown
- 1975-05-06 SE SE7505290A patent/SE7505290L/en unknown
- 1975-05-06 DD DD185871A patent/DD118051A5/xx unknown
- 1975-05-06 FR FR7514128A patent/FR2270209B1/fr not_active Expired
- 1975-05-06 NO NO751626A patent/NO751626L/no unknown
- 1975-05-07 LU LU72427A patent/LU72427A1/xx unknown
- 1975-05-07 DE DE19752520531 patent/DE2520531A1/en active Pending
- 1975-05-07 ES ES437875A patent/ES437875A1/en not_active Expired
- 1975-05-07 AT AT351775A patent/AT346253B/en not_active IP Right Cessation
- 1975-05-08 JP JP50054324A patent/JPS50152557A/ja active Pending
- 1975-05-09 NL NL7505514A patent/NL7505514A/en not_active Application Discontinuation
-
1976
- 1976-05-28 AT AT390876A patent/AT351775B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DD118051A5 (en) | 1976-02-12 |
| ES437875A1 (en) | 1977-01-01 |
| AT351775B (en) | 1978-02-15 |
| BE828570A (en) | 1975-08-18 |
| NL7505514A (en) | 1975-11-11 |
| DK196775A (en) | 1975-11-09 |
| AT346253B (en) | 1978-11-10 |
| SE7505290L (en) | 1975-11-10 |
| FI751142A (en) | 1975-11-09 |
| PL111038B1 (en) | 1980-08-30 |
| LU72427A1 (en) | 1975-08-26 |
| FR2270209A1 (en) | 1975-12-05 |
| FR2270209B1 (en) | 1980-04-18 |
| AU8013875A (en) | 1976-10-21 |
| ATA390876A (en) | 1979-01-15 |
| JPS50152557A (en) | 1975-12-08 |
| DE2520531A1 (en) | 1975-11-13 |
| CH617642A5 (en) | 1980-06-13 |
| RO69366A (en) | 1981-07-30 |
| IL47073A (en) | 1978-07-31 |
| IT1010486B (en) | 1977-01-10 |
| ATA351775A (en) | 1978-02-15 |
| IL47073A0 (en) | 1975-06-25 |
| GB1474145A (en) | 1977-05-18 |
| YU103975A (en) | 1982-02-28 |
| IE41336B1 (en) | 1979-12-05 |
| CS202546B2 (en) | 1981-01-30 |
| NO751626L (en) | 1975-11-11 |
| TR19213A (en) | 1978-06-07 |
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