DE102009018959A1 - Reducing thallium concentration from mineral salt solutions, comprises inducing a supersaturation of potassium chloride in the salt solution by usual methods to crystallize potassium chloride and extracting thallium from the solution - Google Patents
Reducing thallium concentration from mineral salt solutions, comprises inducing a supersaturation of potassium chloride in the salt solution by usual methods to crystallize potassium chloride and extracting thallium from the solution Download PDFInfo
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- DE102009018959A1 DE102009018959A1 DE200910018959 DE102009018959A DE102009018959A1 DE 102009018959 A1 DE102009018959 A1 DE 102009018959A1 DE 200910018959 DE200910018959 DE 200910018959 DE 102009018959 A DE102009018959 A DE 102009018959A DE 102009018959 A1 DE102009018959 A1 DE 102009018959A1
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- Prior art keywords
- thallium
- solution
- potassium chloride
- kcl
- mineral salt
- Prior art date
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- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 title claims abstract description 70
- 229910052716 thallium Inorganic materials 0.000 title claims abstract description 45
- BKVIYDNLLOSFOA-UHFFFAOYSA-N thallium Chemical compound [Tl] BKVIYDNLLOSFOA-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000001103 potassium chloride Substances 0.000 title claims abstract description 35
- 235000011164 potassium chloride Nutrition 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000012266 salt solution Substances 0.000 title claims abstract description 16
- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 15
- 235000010755 mineral Nutrition 0.000 title claims abstract description 15
- 239000011707 mineral Substances 0.000 title claims abstract description 15
- 239000000243 solution Substances 0.000 title claims description 27
- 230000001939 inductive effect Effects 0.000 title abstract 2
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000002425 crystallisation Methods 0.000 claims description 2
- 230000008025 crystallization Effects 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- -1 ferrous metals Chemical class 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 229910052783 alkali metal Inorganic materials 0.000 claims 1
- 150000001340 alkali metals Chemical class 0.000 claims 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims 1
- 150000001342 alkaline earth metals Chemical class 0.000 claims 1
- 150000001450 anions Chemical class 0.000 claims 1
- 150000001768 cations Chemical class 0.000 claims 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims 1
- 238000004140 cleaning Methods 0.000 claims 1
- 239000000284 extract Substances 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 claims 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 8
- 239000000203 mixture Substances 0.000 description 4
- 239000011780 sodium chloride Substances 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- BUHVIAUBTBOHAG-FOYDDCNASA-N (2r,3r,4s,5r)-2-[6-[[2-(3,5-dimethoxyphenyl)-2-(2-methylphenyl)ethyl]amino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol Chemical compound COC1=CC(OC)=CC(C(CNC=2C=3N=CN(C=3N=CN=2)[C@H]2[C@@H]([C@H](O)[C@@H](CO)O2)O)C=2C(=CC=CC=2)C)=C1 BUHVIAUBTBOHAG-FOYDDCNASA-N 0.000 description 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- C02F1/52—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
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (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)
- Removal Of Specific Substances (AREA)
Abstract
Description
Gegenstand der ErfindungSubject of the invention
Die Erfindung betrifft eine Methode zur Reduzierung der Thalliumkonzentration in Mineralsalzlösungen.The The invention relates to a method for reducing the thallium concentration in mineral salt solutions.
Aufgabe der ErfindungObject of the invention
Wegen der hohen Toxizität des Thalliums ist man häufig bestrebt, dieses aus wässerigen Lösungen bis zu einer irrelevanten End-Konzentration zu entfernen. Dieses Bestreben gilt auch für wässrige Mineralsalzlösungen, insbesondere, wenn diese oder einer ihrer Inhaltsstoffe während ihres Lebenszyklus mit Menschen, Tieren, Pflanzen oder allgemein der Umwelt in Berührung kommt. Für diesen Fall ist es wichtig, dass Thallium möglichst vollständig aus den Lösungen zu entfernen, um damit das Gefahrenpotenzial infolge der Toxizität des Thalliums weitgehend abzubauen. Bekannte Verfahren zur Reduzierung der Thalliumkonzentration sind Fällprozesse durch Einstellung eines geeigneten pH-Wertes oder unter Zuhilfenahme von allgemein bekannten Fällmitteln, wie Eisen- oder Aluminiumsalze. Nachteilig an diesem Verfahren ist, dass die Abreicherung von Thallium auf eine Konzentration unterhalb von 1 mg/l nicht oder nur mit erhöhtem technischen Aufwand möglich ist.Because of The high toxicity of thallium is common endeavoring to extract this from aqueous solutions to remove an irrelevant end-concentration. This aspiration also applies to aqueous mineral salt solutions, especially if these or one of their ingredients during their life cycle with humans, animals, plants or in general the environment comes into contact. In this case It is important that Thallium be as complete as possible to remove from the solutions in order to reduce the risk potential due to the toxicity of thallium largely reduce. Known methods for reducing thallium concentration are Precipitation processes by setting a suitable pH or with the aid of well-known precipitants, such as iron or aluminum salts. A disadvantage of this method is that the depletion of thallium to a concentration below of 1 mg / l not or only with increased technical effort is possible.
Eine
weitere Methode besteht in der Anwendung von Ionenaustauscherharzen
mit spezifisch wirkenden funktionellen Gruppen. Die Patentschrift
Eine weitere Patentschrift beschreibt die Extraktion von Thallium aus wässrigen Lösungen mittels eines wenig wasserlöslichen organischen Reagenzes, das in organischen Lösungsmittel gelöst wird und anschließend mit der wässrigen, thalliumhaltigen Lösung in Kontakt gebracht wird, wodurch insbesondere dreiwertige Thalliumionen in die organische Phase übergehen. Nachteilig an dieser Verfahrensweise ist, dass das Extraktionsmittel aufbereitet werden muss und stets Verluste des organischen Reagenzes in Kauf genommen werden müssen.A Another patent describes the extraction of thallium aqueous solutions by means of a little water-soluble organic reagent that is in organic solvent is dissolved and then with the aqueous, thalliumhaltigen solution is brought into contact, whereby in particular Turn trivalent thallium ions into the organic phase. A disadvantage of this procedure is that the extractant must be recycled and always losses of the organic reagent must be accepted.
Beschreibung der ErfindungDescription of the invention
Überraschenderweise wurde gefunden, dass Thallium in einfacher uns zugleich sehr effektiver Weise aus wässrigen Salzlösungen bis auf Thallium-Konzentrationen von 10–9 mol/l reduziert werden kann, wenn man Kaliumchlorid in dieser Lösung zur Kristallisation bringt. Dabei ist es unwesentlich, welche Mineralsalze neben dem Kaliumchlorid in der wässrigen Lösung enthalten sind. Voraussetzung für die Kristallisation ist das Bewirken einer Übersättigung von Kaliumchlorid. Die Art und Weise mit der die Übersättigung an Kaliumchlorid erzielt wird, spielt eine untergeordnete Rolle im Bezug auf die Abreicherung des Thalliums in der wässrigen Lösung.Surprisingly, it has been found that thallium can be reduced in a simple yet very effective manner from aqueous salt solutions to thallium concentrations of 10 -9 mol / l, if potassium chloride is crystallized in this solution. It is immaterial which mineral salts are included in the aqueous solution in addition to the potassium chloride. Prerequisite for the crystallization is the effect of supersaturation of potassium chloride. The manner in which the supersaturation of potassium chloride is achieved plays a minor role in terms of the depletion of thallium in the aqueous solution.
Eine Variante, mit der das kristallisierte und mit Thallium verunreinigte Kaliumchlorid weitgehend in den Prozess zurück geführt werden kann besteht darin, dass man das Kaliumchlorid-Thallium-Gemisch der zu reinigenden Lösung zuführt, wodurch sich neben der Kaliumkonzentration auch die Thalliumkonzentration erhöht. Dabei ist zu beachten, dass die Löslichkeitsgrenze des Kaliumchlorids in der Lösung nicht überschritten wird. Dieses kann beispielsweise durch die Einstellung einer ausreichend hohen Temperatur bewirkt werden. Die nun mit Thallium angereicherte Lösung kann mit anderen bekannten Methoden, zum Beispiel Fällung, in ihrer Thalliumkonzentration vermindert werden. Um Thallium quasi vollständig aus der Lösung zu entfernen, wird nach der Abtrennung des Präzipitates die Löslichkeitsgrenze für Kaliumchlorids beispielsweise durch Absenken der Temperatur überschritten, wodurch Kaliumchlorid kristallisiert und dabei das noch in der Lösung vorhandene Thallium mit aus der Lösung entfernt. Das Kaliumchlorid-Thallium-Gemisch kann anschließend wieder der zu reinigenden Lösung zugeführt werden und die Prozedur beginnt von neuem.A Variant with which the crystallized and contaminated with thallium Potassium chloride has largely returned to the process It can consist of adding the potassium chloride-thallium mixture supplying the solution to be purified, resulting in In addition to the potassium concentration, the thallium concentration is also increased. It should be noted that the solubility limit of the Potassium chloride in the solution not exceeded becomes. This can, for example, by setting a sufficient high temperature can be effected. The now enriched with thallium Solution can be done with other known methods, for example Precipitation be reduced in their Thalliumkonzentration. To quit thallium almost completely from the solution remove, after the separation of the precipitate the Solubility limit for potassium chloride, for example by lowering the temperature exceeded, causing potassium chloride crystallized while the remaining in the solution Thallium with removed from the solution. The potassium chloride-thallium mixture then again the solution to be cleaned and the procedure starts again.
Ausführungsbeispieleembodiments
Beispiel 1example 1
Eine Lösung mit 350 g/l KCl und 2,3 mg/l Thallium wird von 80°C auf 20°C abgekühlt, wodurch die KCl Konzentration auf 320 g und die Thalliumkonzentration auf 0,03 mg/l reduziert wurde. Das Kristallisat enthält 75 mg/kg ThalliumA Solution with 350 g / l KCl and 2.3 mg / l thallium is from 80 ° C cooled to 20 ° C, reducing the KCl concentration reduced to 320 g and the thallium concentration to 0.03 mg / l has been. The crystals contain 75 mg / kg thallium
Beispiel 2Example 2
Eine Lösung mit 330 g/l KCl, 15 g/l NaCl und 10 g/l Na2SO4 sowie mit 0,6 mg/l Thallium wird von 90°C auf 30°C abgekühlt. Nach der Abkühlung besitzt die Lösung folgende Zusammensetzung 315 g/l KCl, 14 g/l NaCl, 10 g/l Na2SO4 sowie 0,040 mg/l Thallium.A solution with 330 g / l KCl, 15 g / l NaCl and 10 g / l Na 2 SO 4 and with 0.6 mg / l thallium is cooled from 90 ° C to 30 ° C. After cooling, the solution has the following composition 315 g / l KCl, 14 g / l NaCl, 10 g / l Na 2 SO 4 and 0.040 mg / l thallium.
Beispiel 3Example 3
Eine Lösung mit 330 g/l KCl, 75 g/l NaCl und 5 g/l Na2SO4 sowie mit 1,6 mg/l Thallium wird von 90°C auf 10°C abgekühlt. Nach der Abkühlung besitzt die Lösung folgende Zusammensetzung: 310 g/l KCl, 76 g/l NaCl, 5 g/l Na2SO4 sowie 0,010 mg/l Thallium.A solution with 330 g / l KCl, 75 g / l NaCl and 5 g / l Na 2 SO 4 and with 1.6 mg / l thallium is cooled from 90 ° C to 10 ° C. After cooling, the solution has the following composition: 310 g / l KCl, 76 g / l NaCl, 5 g / l Na 2 SO 4 and 0.010 mg / l thallium.
Beispiel 4Example 4
Eine an KCl gesättigte Lösung mit 5,3 mg/l Thallium wird durch Verdampfung von Wasser in ihrem Volumen halbiert. Nach Abtrennung des Kristallisates ist die Lösung weiterhin an KCl gesättigt, jedoch kann kein Thallium mehr nachgewiesen werden. Die Lösung wird zur Gewinnung von KCl weiter eingedampft. Das Kristallisat mit 30 mg/kg Thallium wird einer an KCl untersättigten mit 15 mg/l Thallium Lösung zugeführt. Nach Zufuhr von Eisen-(III)-chlorid wird bei pH = 7 ein thalliumhaltiger Eisenhydroxidschlamm ausgefällt. Nach dessen Abtrennung beträgt die Thalliumkonzentration in der Lösung 4,7 mg/l. Die Lösung wird eingedampft, wobei bei einer Thalliumkonzentration von 5,3 mg/l auch die KCl Konzentration beginnt und der Prozesskreislauf sich schließt.A solution saturated with KCl with 5.3 mg / l thallium is halved by evaporation of water in its volume. To Separation of the crystals, the solution is still saturated with KCl, but no more thallium can be detected become. The solution is further evaporated to recover KCl. The crystallizate containing 30 mg / kg thallium becomes undersaturated with KCl supplied with 15 mg / l thallium solution. After feed of ferric chloride becomes a thallium-containing iron hydroxide slurry at pH = 7 precipitated. After its separation is the Thallium concentration in the solution 4.7 mg / l. The solution is evaporated, with a thallium concentration of 5.3 mg / l also begins the KCl concentration and the process cycle closes.
ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- - EP 0442778 [0003] EP 0442778 [0003]
- - EP 0620041 [0003] - EP 0620041 [0003]
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009018959.9A DE102009018959B4 (en) | 2009-04-25 | 2009-04-25 | Process for reducing thallium concentration in mineral salt solutions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009018959.9A DE102009018959B4 (en) | 2009-04-25 | 2009-04-25 | Process for reducing thallium concentration in mineral salt solutions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE102009018959A1 true DE102009018959A1 (en) | 2010-10-28 |
| DE102009018959B4 DE102009018959B4 (en) | 2016-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102009018959.9A Expired - Fee Related DE102009018959B4 (en) | 2009-04-25 | 2009-04-25 | Process for reducing thallium concentration in mineral salt solutions |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102009018959B4 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012143394A1 (en) | 2011-04-20 | 2012-10-26 | Solvay Sa | Method for recovery of thallium from an aqueous solution |
| CN106082502A (en) * | 2016-08-16 | 2016-11-09 | 华南理工大学 | A kind of remove the method for thallium in waste water |
| CN110655228A (en) * | 2019-08-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | Wastewater treatment process and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442778A1 (en) | 1990-02-05 | 1991-08-21 | Metaleurop S.A. | Process for the extraction of thallium |
| EP0620041A1 (en) | 1993-04-13 | 1994-10-19 | Bayer Ag | Ion exchange resin for multiple regeneration with a low alkylmercaptan groups content |
| WO1996019413A1 (en) * | 1994-12-20 | 1996-06-27 | M.I.M. Hüttenwerke Duisburg Gesellschaft Mit Beschränkter Haftung | Process for treating waste water containing metals |
| DE19963988A1 (en) * | 1999-12-31 | 2001-07-05 | Stefan Weisgraeber | Treatment of waste fluids containing arsenic involves treatment with ammonium iron sulfate |
-
2009
- 2009-04-25 DE DE102009018959.9A patent/DE102009018959B4/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0442778A1 (en) | 1990-02-05 | 1991-08-21 | Metaleurop S.A. | Process for the extraction of thallium |
| EP0620041A1 (en) | 1993-04-13 | 1994-10-19 | Bayer Ag | Ion exchange resin for multiple regeneration with a low alkylmercaptan groups content |
| WO1996019413A1 (en) * | 1994-12-20 | 1996-06-27 | M.I.M. Hüttenwerke Duisburg Gesellschaft Mit Beschränkter Haftung | Process for treating waste water containing metals |
| DE19963988A1 (en) * | 1999-12-31 | 2001-07-05 | Stefan Weisgraeber | Treatment of waste fluids containing arsenic involves treatment with ammonium iron sulfate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012143394A1 (en) | 2011-04-20 | 2012-10-26 | Solvay Sa | Method for recovery of thallium from an aqueous solution |
| CN106082502A (en) * | 2016-08-16 | 2016-11-09 | 华南理工大学 | A kind of remove the method for thallium in waste water |
| CN106082502B (en) * | 2016-08-16 | 2019-06-18 | 华南理工大学 | A kind of method of thallium in removal waste water |
| CN110655228A (en) * | 2019-08-31 | 2020-01-07 | 广东韶钢松山股份有限公司 | Wastewater treatment process and system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009018959B4 (en) | 2016-09-29 |
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