GB1474145A - Reducing the contents of heavy metals in solution - Google Patents
Reducing the contents of heavy metals in solutionInfo
- Publication number
- GB1474145A GB1474145A GB1736975A GB1736975A GB1474145A GB 1474145 A GB1474145 A GB 1474145A GB 1736975 A GB1736975 A GB 1736975A GB 1736975 A GB1736975 A GB 1736975A GB 1474145 A GB1474145 A GB 1474145A
- Authority
- GB
- United Kingdom
- Prior art keywords
- waters
- iron
- electropositive
- purification
- contents
- 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.)
- Expired
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.
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 (1)
| Publication Number | Publication Date |
|---|---|
| GB1474145A true GB1474145A (en) | 1977-05-18 |
Family
ID=11195718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1736975A Expired GB1474145A (en) | 1974-05-08 | 1975-04-25 | 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006717A1 (en) * | 1992-09-18 | 1994-03-31 | I. Krüger Systems As | Method for the purification of metal-containing aqueous media and method of preparing an adsorbent |
Families Citing this family (5)
| 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@ |
| 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 TR TR19213A patent/TR19213A/en unknown
- 1975-04-29 BE BE155938A patent/BE828570A/en unknown
- 1975-05-05 CS CS753094A patent/CS202546B2/en unknown
- 1975-05-05 RO RO7582142A patent/RO69366A/en unknown
- 1975-05-05 DK DK196775A patent/DK196775A/en unknown
- 1975-05-05 PL PL1975180173A patent/PL111038B1/en unknown
- 1975-05-06 SE SE7505290A patent/SE7505290L/en unknown
- 1975-05-06 NO NO751626A patent/NO751626L/no unknown
- 1975-05-06 DD DD185871A patent/DD118051A5/xx unknown
- 1975-05-06 FR FR7514128A patent/FR2270209B1/fr not_active Expired
- 1975-05-07 DE DE19752520531 patent/DE2520531A1/en active Pending
- 1975-05-07 LU LU72427A patent/LU72427A1/xx unknown
- 1975-05-07 AT AT351775A patent/AT346253B/en not_active IP Right Cessation
- 1975-05-07 ES ES437875A patent/ES437875A1/en not_active Expired
- 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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994006717A1 (en) * | 1992-09-18 | 1994-03-31 | I. Krüger Systems As | Method for the purification of metal-containing aqueous media and method of preparing an adsorbent |
| AU667132B2 (en) * | 1992-09-18 | 1996-03-07 | Kruger Off-Shore A/S | Method for the purification of metal-containing aqueous media and method of preparing an adsorbent |
Also Published As
| Publication number | Publication date |
|---|---|
| YU103975A (en) | 1982-02-28 |
| PL111038B1 (en) | 1980-08-30 |
| CS202546B2 (en) | 1981-01-30 |
| AT351775B (en) | 1978-02-15 |
| IE41336L (en) | 1975-11-08 |
| AU8013875A (en) | 1976-10-21 |
| DD118051A5 (en) | 1976-02-12 |
| CH617642A5 (en) | 1980-06-13 |
| NL7505514A (en) | 1975-11-11 |
| NO751626L (en) | 1975-11-11 |
| IL47073A0 (en) | 1975-06-25 |
| ES437875A1 (en) | 1977-01-01 |
| IE41336B1 (en) | 1979-12-05 |
| BE828570A (en) | 1975-08-18 |
| ATA351775A (en) | 1978-02-15 |
| IL47073A (en) | 1978-07-31 |
| IT1010486B (en) | 1977-01-10 |
| FR2270209A1 (en) | 1975-12-05 |
| JPS50152557A (en) | 1975-12-08 |
| AT346253B (en) | 1978-11-10 |
| DE2520531A1 (en) | 1975-11-13 |
| FR2270209B1 (en) | 1980-04-18 |
| TR19213A (en) | 1978-06-07 |
| RO69366A (en) | 1981-07-30 |
| LU72427A1 (en) | 1975-08-26 |
| ATA390876A (en) | 1979-01-15 |
| SE7505290L (en) | 1975-11-10 |
| DK196775A (en) | 1975-11-09 |
| FI751142A (en) | 1975-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mosey et al. | Factors affecting the availability of heavy metals to inhibit anaerobic digestion | |
| GB1490926A (en) | Removal of hexavalent chromate trivalent chromium molybdate and zinc ions from water | |
| Kim | Treatment of metal containing wastewater with calcium sulfide | |
| GB1474145A (en) | Reducing the contents of heavy metals in solution | |
| ES461576A1 (en) | Process for the conditioning of solid radioactive waste with large dimensions | |
| ES8403839A1 (en) | Reclamation process for water-borne uranium | |
| US3136715A (en) | Process of removing ruthenium from aqueous solutions | |
| GB1471162A (en) | Operation of a two-phase reactor | |
| ES2127157A1 (en) | Process for the treatment and decontamination of acid waters which contain dissolved metals and their conversion into fertilizers (pidra process) | |
| JPS57105284A (en) | Purification of waste water used in desulfurization of exhaust gas | |
| SCHAFFER | INTERIM EFFLUENT GUIDANCE FOR NPDES PERMITS | |
| JPS54156346A (en) | Purification of metal plating waste water | |
| Ferguson et al. | Minewater Treatment-Inco Sudbury District Operations | |
| FR2201257A1 (en) | Waste-water purification - using water miscible solvent, and mineral prodt coated with hydrophobic material | |
| JPS57144080A (en) | Method and device for purification of liquid using oxine-stuck active carbon | |
| JPS52135560A (en) | Microbial treating method of waste water | |
| ES409546A1 (en) | Treatment for waste water or the like | |
| CULP et al. | Phosphorous Removal from Waste water by Activated Alumina Columns | |
| JPS57153790A (en) | Regeneration of chelating resing having adsorbed fluorine compound in it | |
| Lee et al. | Industrial Waters of Taegu City and on the Objection of Iron for Water Softening | |
| Wolff | Selective elimination of heavy metals from industrial effluents by means of ion-exchange resins and adsorbents | |
| Leightell | Application of Reverse Osmosis in Water Conservation and Treatment in the Motor Industry | |
| Verfahrenstechnik | Rapid clarification of industrial wastes | |
| BOLTER et al. | WATER GEOCHEMISTRY OF MINING AND MILLING RETENTION IN THE'NEW LEAD BELT' OF SOUTHEAST MISSOURI | |
| Pourbaix et al. | Chemical and Electrochemical Equilibrium Diagrams in the Presence of a Gaseous Phase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |