ES437875A1 - Reducing the contents of heavy metals in solution - Google Patents
Reducing the contents of heavy metals in solutionInfo
- Publication number
- ES437875A1 ES437875A1 ES437875A ES437875A ES437875A1 ES 437875 A1 ES437875 A1 ES 437875A1 ES 437875 A ES437875 A ES 437875A ES 437875 A ES437875 A ES 437875A ES 437875 A1 ES437875 A1 ES 437875A1
- Authority
- ES
- Spain
- 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 |
|---|---|
| ES437875A1 true ES437875A1 (en) | 1977-01-01 |
Family
ID=11195718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES437875A Expired ES437875A1 (en) | 1974-05-08 | 1975-05-07 | 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@ |
| DE69308311T2 (en) * | 1992-09-18 | 1997-09-11 | Krueger As I | METHOD FOR PURIFYING METAL-CONTAINING AQUEOUS LIQUIDS AND METHOD FOR PRODUCING 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 IE IE946/75A patent/IE41336B1/en unknown
- 1975-04-28 CH CH541075A patent/CH617642A5/en not_active IP Right Cessation
- 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 PL PL1975180173A patent/PL111038B1/en unknown
- 1975-05-05 DK DK196775A patent/DK196775A/en unknown
- 1975-05-06 SE SE7505290A patent/SE7505290L/en unknown
- 1975-05-06 DD DD185871A patent/DD118051A5/xx unknown
- 1975-05-06 NO NO751626A patent/NO751626L/no 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 ES ES437875A patent/ES437875A1/en not_active Expired
- 1975-05-07 AT AT351775A patent/AT346253B/en not_active IP Right Cessation
- 1975-05-07 LU LU72427A patent/LU72427A1/xx unknown
- 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 |
|---|---|
| GB1474145A (en) | 1977-05-18 |
| CS202546B2 (en) | 1981-01-30 |
| NL7505514A (en) | 1975-11-11 |
| AT351775B (en) | 1978-02-15 |
| DD118051A5 (en) | 1976-02-12 |
| FR2270209B1 (en) | 1980-04-18 |
| CH617642A5 (en) | 1980-06-13 |
| ATA351775A (en) | 1978-02-15 |
| BE828570A (en) | 1975-08-18 |
| NO751626L (en) | 1975-11-11 |
| AU8013875A (en) | 1976-10-21 |
| LU72427A1 (en) | 1975-08-26 |
| YU103975A (en) | 1982-02-28 |
| FR2270209A1 (en) | 1975-12-05 |
| IE41336B1 (en) | 1979-12-05 |
| PL111038B1 (en) | 1980-08-30 |
| ATA390876A (en) | 1979-01-15 |
| RO69366A (en) | 1981-07-30 |
| JPS50152557A (en) | 1975-12-08 |
| SE7505290L (en) | 1975-11-10 |
| IL47073A0 (en) | 1975-06-25 |
| TR19213A (en) | 1978-06-07 |
| DE2520531A1 (en) | 1975-11-13 |
| FI751142A (en) | 1975-11-09 |
| IE41336L (en) | 1975-11-08 |
| IL47073A (en) | 1978-07-31 |
| IT1010486B (en) | 1977-01-10 |
| AT346253B (en) | 1978-11-10 |
| DK196775A (en) | 1975-11-09 |
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