NL8702005A - Removing heavy metals, esp. cadmium, from contaminated earth - by inserting electrodes and passing current between them to deposit heavy metal at cathode - Google Patents
Removing heavy metals, esp. cadmium, from contaminated earth - by inserting electrodes and passing current between them to deposit heavy metal at cathode Download PDFInfo
- Publication number
- NL8702005A NL8702005A NL8702005A NL8702005A NL8702005A NL 8702005 A NL8702005 A NL 8702005A NL 8702005 A NL8702005 A NL 8702005A NL 8702005 A NL8702005 A NL 8702005A NL 8702005 A NL8702005 A NL 8702005A
- Authority
- NL
- Netherlands
- Prior art keywords
- cadmium
- soil
- esp
- cathode
- heavy metals
- Prior art date
Links
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 7
- 229910052793 cadmium Inorganic materials 0.000 title claims description 8
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 title claims description 7
- 239000002689 soil Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 11
- 239000003673 groundwater Substances 0.000 claims description 6
- 230000001419 dependent effect Effects 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009852 extractive metallurgy Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Soil Sciences (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
NO 34695 'f ' \ -1-NO 34695 'f' \ -1-
Werkwijze voor het verwijderen van (schadelijke) zware metalen uit verontreinigde bodem/grond.Method for removing (harmful) heavy metals from contaminated soil / soil.
De uitvinding heeft betrekking op een werkwijze voor het verwijderen van zware metalen, in het bijzonder cadmium, uit verontreinigde grond of verontreinigde bydem.The invention relates to a method for removing heavy metals, in particular cadmium, from contaminated soil or contaminated bydem.
Het is bekend (Extractive Metallurgy of Copper, A.K. Biswas, 5 University of Queensland, Australia, Pergamon InternationalIt is known (Extractive Metallurgy of Copper, A.K.Biswas, 5 University of Queensland, Australia, Pergamon International
Library, International Series on Materials Science, Vol.20, 1976) koper of zink in de fabriek uit erts m.h.v. electrolyse te winnen.Library, International Series on Materials Science, Vol. 20, 1976) copper or zinc in the factory from ore with the aid of electrolysis.
Het zink bijvoorbeeld wordt daarbij in oplossing naar een kathode gevoerd en daarop als metalliek zink afgezet.The zinc, for example, is fed in solution to a cathode and deposited thereon as metallic zinc.
IQ Gevonden werd een werkwijze voor het verwijderen van schade lijke zware metalen uit een verontreinigde grond of bodem, welke werkwijze is gekenmerkt, doordat men een of meer anoden of kathoden in de grond respectievelijk bodem op een afstand van elkaar, die afhankelijk is van de diepte van het grondwater, steekt en ^5 daartussen een stroom aanlegt.IQ has found a method for removing harmful heavy metals from a contaminated soil or soil, which method is characterized in that one or more anodes or cathodes in the soil or soil are spaced apart depending on the depth of the groundwater, and ^ 5 creates a current between them.
Opgemerkt wordt, dat het reeds bekend is (Introduction to Geophysical Prospecting, Milton Dobrin, Me Graw Hill Book Co.,It is noted that it is already known (Introduction to Geophysical Prospecting, Milton Dobrin, Me Graw Hill Book Co.,
New York, 1952, Chapter 16 ''Electrical Prospecting Methods") elec-trische stroom toe te passen voor het opsporen van grondwater.New York, 1952, Chapter 16 "Electrical Prospecting Methods") to apply electrical power for groundwater detection.
20 De uitvinding heeft in het bijzonder betrekking op het verwij deren van cadmium uit de grond. Cadmium kan als verontreiniging in het grondwater of de grond aanwezig zijn in opgeloste vorm, mogelijk geadsorbeerd aan kleideeltjes. Deze adsorptie kan eindigen door inwerking van bacteriën of electrische stroom.The invention particularly relates to the removal of cadmium from the soil. Cadmium can be present as a contaminant in groundwater or soil in dissolved form, possibly adsorbed on clay particles. This adsorption can end by the action of bacteria or electric current.
25 De toe te passen stroomsterkte is afhankelijk van de diepte van het grondwater. Als vuistregel geldt een stroomsterkte in A, die 4x zo groot is als deze diepte in m. Bij een hoge stroomsterkte verloopt het proces sneller, maar bestaat het risico van afwijkingen. In het algemeen wordt gestreefd naar een zo hoog mogelijke 30 stroomsterkte.25 The current to be applied depends on the depth of the groundwater. As a rule of thumb, a current in A is 4x as great as this depth in m. At a high current, the process proceeds faster, but there is a risk of deviations. Generally, the aim is to have the highest possible amperage.
Bij de werkwijze volgens de uitvinding wordt bij voorkeur een stroomsterkte van 5 - 10 A. toegepast bij 220 Volt gelijkstroom.In the method according to the invention, a current strength of 5 - 10 A is preferably used at 220 V DC.
Mogelijk kan ook een electrode van betonijzer in een draina-geslang gevuld met een zwakke natriumsulfaatoplossing als anode die-35 nen.A rebar electrode in a drain hose filled with a weak sodium sulfate solution may also serve as an anode.
8702005 -2-8702005 -2-
VV
Voorts is gebleken, dat de werkwijze volgens de uitvinding kan worden versneld door de grond met water met een pH van 3-5 te besproeien.It has further been found that the method according to the invention can be accelerated by spraying the soil with water with a pH of 3-5.
Voorbeeld 5 Op een terrein van 4-00 m^ grond, die 25 mg cadmium per kg bevat (ofwel 25 kg), worden 10 anoden en kathoden op een afstand van 8 m van elkaar (bij een diepte van het grondwater van 2 m) geplaatst. Op de electroden wordt een stroomsterkte van 5 A middels 220 Volt gelijkstroom aangelegd. Uitgaande van 1 mg Cd/A.sec. en 10 een electrische stroom, die voor 25% uit Cd-ionen bestaat, is er na een periode van 3 maanden een hoeveelheid van 50% van het cadmium aan de kathoden afgezet.Example 5 In an area of 4-00 m 2 soil, containing 25 mg cadmium per kg (or 25 kg), 10 anodes and cathodes are spaced 8 m apart (at a depth of 2 m groundwater) placed. A current of 5 A is applied to the electrodes via 220 Volt direct current. Starting from 1 mg Cd / A.sec. and an electric current consisting of 25% Cd ions, 50% of the cadmium is deposited on the cathodes after a period of 3 months.
87020058702005
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8702005A NL188415C (en) | 1987-08-27 | 1987-08-27 | METHOD FOR THE REMOVAL OF HEAVY METALS FROM SOIL OR SOIL CONTAMINATED. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL8702005 | 1987-08-27 | ||
| NL8702005A NL188415C (en) | 1987-08-27 | 1987-08-27 | METHOD FOR THE REMOVAL OF HEAVY METALS FROM SOIL OR SOIL CONTAMINATED. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NL8702005A true NL8702005A (en) | 1989-03-16 |
| NL188415B NL188415B (en) | 1992-01-16 |
| NL188415C NL188415C (en) | 1992-06-16 |
Family
ID=19850507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL8702005A NL188415C (en) | 1987-08-27 | 1987-08-27 | METHOD FOR THE REMOVAL OF HEAVY METALS FROM SOIL OR SOIL CONTAMINATED. |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL188415C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5415744A (en) * | 1994-06-01 | 1995-05-16 | Massachusetts Institute Of Technology | Removal of contaminant material from a soil site |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1280777B (en) * | 1967-07-25 | 1968-10-24 | Gewerkschaft Brunhilde | Process for dissolving uranium ores in situ with the help of electric current |
| US3922224A (en) * | 1972-03-31 | 1975-11-25 | Procedes D Assainissement Pura | Apparatus for treating waste waters |
| US3956087A (en) * | 1974-05-17 | 1976-05-11 | Mineral Research & Development Corporation | Electrochemical mining of copper |
| EP0087663A1 (en) * | 1982-02-16 | 1983-09-07 | ELTAC Nogler & Daum KG | Device for producing an electric field |
| EP0161698A1 (en) * | 1984-04-04 | 1985-11-21 | Wegenbouwmaatschappij J. Heijmans B.V. | Method for cleansing and decontaminating soil and the equipment used for this purpose |
-
1987
- 1987-08-27 NL NL8702005A patent/NL188415C/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1280777B (en) * | 1967-07-25 | 1968-10-24 | Gewerkschaft Brunhilde | Process for dissolving uranium ores in situ with the help of electric current |
| US3922224A (en) * | 1972-03-31 | 1975-11-25 | Procedes D Assainissement Pura | Apparatus for treating waste waters |
| US3956087A (en) * | 1974-05-17 | 1976-05-11 | Mineral Research & Development Corporation | Electrochemical mining of copper |
| EP0087663A1 (en) * | 1982-02-16 | 1983-09-07 | ELTAC Nogler & Daum KG | Device for producing an electric field |
| EP0161698A1 (en) * | 1984-04-04 | 1985-11-21 | Wegenbouwmaatschappij J. Heijmans B.V. | Method for cleansing and decontaminating soil and the equipment used for this purpose |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5415744A (en) * | 1994-06-01 | 1995-05-16 | Massachusetts Institute Of Technology | Removal of contaminant material from a soil site |
Also Published As
| Publication number | Publication date |
|---|---|
| NL188415B (en) | 1992-01-16 |
| NL188415C (en) | 1992-06-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A1C | A request for examination has been filed | ||
| BT | A notification was added to the application dossier and made available to the public | ||
| V1 | Lapsed because of non-payment of the annual fee |