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WO2002081385A2 - Agent de separation de metaux lourds dans des eaux polluees - Google Patents

Agent de separation de metaux lourds dans des eaux polluees Download PDF

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Publication number
WO2002081385A2
WO2002081385A2 PCT/DE2002/001188 DE0201188W WO02081385A2 WO 2002081385 A2 WO2002081385 A2 WO 2002081385A2 DE 0201188 W DE0201188 W DE 0201188W WO 02081385 A2 WO02081385 A2 WO 02081385A2
Authority
WO
WIPO (PCT)
Prior art keywords
water
titanium oxide
metals
radium
arsenic
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.)
Ceased
Application number
PCT/DE2002/001188
Other languages
German (de)
English (en)
Other versions
WO2002081385A3 (fr
Inventor
Eiko Hermann
Frank Dullies
Ingeborg Griebel
Gunter Kieszig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wismut GmbH
Original Assignee
Wismut GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wismut GmbH filed Critical Wismut GmbH
Priority to AU2002302335A priority Critical patent/AU2002302335A1/en
Publication of WO2002081385A2 publication Critical patent/WO2002081385A2/fr
Publication of WO2002081385A3 publication Critical patent/WO2002081385A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/288—Treatment of water, waste water, or sewage by sorption using composite sorbents, e.g. coated, impregnated, multi-layered
    • 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
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2101/006—Radioactive compounds
    • 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
    • C02F2101/103—Arsenic compounds
    • 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
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate

Definitions

  • the invention relates to a means for separating heavy metals, metals, arsenic, uranium and radium from contaminated water by a reactive material consisting of several components in the form of a titanium oxide hydrate granulate.
  • the removal of pollutants primarily uranium, radium, arsenic, molybdenum and nickel, from groundwater, surface water and seepage water as well as drinking and mineral water is usually carried out according to the same basic principles of precipitation and adsorption.
  • the removal of pollutants from drinking and mineral waters is subject to the requirement that the water composition must not be changed when the pollutants are removed; H. no additional ions have to be introduced or removed into the water to be treated.
  • the contaminated water is treated in special water treatment systems before being discharged into the hydrographic network.
  • Radioactively contaminated waters contain radium on the one hand as a natural decay product of uranium in the form of dissolved radium ions and on the other hand it is bound to fine mineral suspended matter.
  • Uranium exists at pH values well above 4.2 in the form of its pH-specific uranyl carbonate complexes. Other metals are present as ions, arsenic as arsenate under oxidative conditions.
  • the precipitation of the pollutants from the contaminated waters is known to be carried out in several stages, the higher stages of uranium in the order of several milligrams per liter being precipitated as the first stage.
  • the second stage is followed by the Separation of the radium from arsenic is carried out analogously to the removal of phosphate from water with iron salts or adsorbed on the iron hydroxide which forms
  • PRW permeable reactive walls
  • the effectiveness of the passive systems used depends on their implementation costs, essentially the costs for the reactive material and the service life, i.e. H. the time in which the system eliminates the pollutants from the water.
  • the service life is determined by the type of ions to be eliminated and the level of pollutants in the water to be cleaned. If the pollutants are separated off by precipitation, the precipitation products displace the pores of the reactive material, as a result of which, after a given time, it becomes impermeable to water and thus ineffective for the task to be performed.
  • the free surface available i. H. the grain size distribution of the material used is of crucial importance.
  • the precipitation of water-insoluble carbonates or sulfates in the reactive material usually represents a limitation that questions the use of the material.
  • the fineness of the reactive material is too low, the flowability is no longer guaranteed after a short time, or on the other hand, if the pore volume is too small, the absorption capacity of the reactive material for the pollutant ions is unacceptably low. It is therefore necessary to find a compromise between the free surface of the adsorption-active medium available for the adsorption and the available pore volume for the flow through the adsorption-active medium.
  • a similar problem with very special boundary conditions occurs when removing pollutants from drinking and / or mineral water.
  • the special conditions are that no additional ions may be introduced or removed. This basically eliminates all precipitation processes and only adsorption onto a reactive medium is conceivable, which acts as a quasi-mechanical filter without other ions being taken up or released.
  • the addition of barium chloride is not suitable for the removal of radium from drinking and / or mineral water.
  • An alternative is the use of natural mineral barium sulfate (barite).
  • the object of the invention is to provide an effective and inexpensive means for separating heavy metals, metals, arsenic, uranium and radium from contaminated water,
  • the object is achieved by a means for separating heavy metals, metals, arsenic, uranium and radium from water contaminated with pollutants by means of a reactive material consisting of several components, which comprises a homogeneous mixture in the form of a titanium oxide hydride.
  • a reactive material consisting of several components, which comprises a homogeneous mixture in the form of a titanium oxide hydride.
  • the homogeneous mixture is filled into flat containers for drying at 50 ° C. to 95 ° C. for 10 to 30 hours and then annealed at 110 ° C. to 140 ° C. for up to 2 hours. After cooling, the raw material is broken and classified.
  • the agent produced according to the invention has a structure which ensures good flow-through for the water to be cleaned as well as a sufficiently large free surface. Titanium oxide hydrate, which would be infinitely diluted and rinsed out of the water in the state of a suspension, is brought into a water-resistant structure by the described means, which ensures a maximum capacity of the reactive material and the flowability. By adding hydrogen peroxide, the titanium oxide hydrate mixture is foamed, an additional enlargement of the outer surface is achieved and a highly porous solid is produced.
  • the tempered titanium oxide hydrate mixture By subsequently breaking the tempered titanium oxide hydrate mixture and classifying it, depending on the application, granules can be produced with any grain size or grain size distribution. The oversize particles that occur during classification are broken again and the undersize particles are returned to the production of the titanium oxide hydrate mixture. In this way, no significant material losses occur during the manufacture of the agent.
  • the homogeneous mixture in the form of titanium oxide hydrate granules is introduced into naturally existing and / or technically created cavities in the flow paths of the waters and / or in technical facilities to which the waters are supplied.
  • the homogeneous mixture in the form of a titanium oxide hydrate granulate is washed in a water bath and adjusted to a pH value of the titanium oxide hydrate granulate of 7 before drying in order to release measurable ion concentrations in to prevent the treated water.
  • the described means produces an effective and inexpensive material that has significant environmental and economic advantages over known means. These advantages are that: the agent has a high mechanical and chemical stability and a large inner surface,
  • the medium has a high absorption capacity for heavy metals, metals, arsenic, uranium and radium and therefore has a long service life
  • the strength of the structural material and the previous classification ensure that no abrasion occurs when the granular agent is installed, which can lead to a displacement of the pore spaces,
  • the volume of the material layer to be introduced can be kept significantly lower than with other materials that are also suitable for the separation of pollutants or the service life can be increased significantly with the same material layer thickness,
  • the example describes a laboratory test of treating a water in a glass column with a titanium oxide hydrate granulate.
  • the water has an arsenic concentration of 1000 ⁇ g / l
  • the titanium oxide hydrate granules used in this experiment have the following composition and grain size class:

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Processing Of Solid Wastes (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

L'invention concerne un agent de séparation de métaux lourds, de métaux, d'arsenic, d'uranium, et de radium dans des eaux polluées, au moyen d'un matériau réactif composé d'un ou plusieurs constituants se présentant sous la forme d'un granulat d'hydrate d'oxyde de titane. La séparation de métaux lourds, de métaux, d'arsenic, d'uranium, et de radium dans des eaux polluées est réalisée au moyen d'un agent composé d'hydrate d'oxyde de titane, d'adhésif à base de vinylacétate et de peroxyde d'hydrogène. Le granulat d'hydrate d'oxyde de titane homogène ainsi fabriqué est caractérisé par une stabilité mécanique et une stabilité chimique élevées, une bonne capacité de passage des eaux à épurer, et une surface libre suffisamment importante. L'invention vise à mettre en oeuvre un agent efficace et économique conforme à la législation, répondant largement aux exigences en matière de réduction des concentrations de métaux lourds, de métaux, d'arsenic, d'uranium et de radium de manière durable, ledit agent ne provoquant pas d'extraction ou d'apport d'ions supplémentaires dans les eaux potables et/ou minérales polluées, et nécessitant des coûts et moyens réduits pour un éventuel recyclage et stockage.
PCT/DE2002/001188 2001-04-05 2002-04-03 Agent de separation de metaux lourds dans des eaux polluees Ceased WO2002081385A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002302335A AU2002302335A1 (en) 2001-04-05 2002-04-03 Means for separating off of heavy metals from polluted water

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10116951.5 2001-04-05
DE2001116951 DE10116951B4 (de) 2001-04-05 2001-04-05 Mittel zur Abtrennung von Metallen, insbesondere von Schwermetallen wie Uran und Radium und Arsen, aus schadstoffbelasteten Wässern

Publications (2)

Publication Number Publication Date
WO2002081385A2 true WO2002081385A2 (fr) 2002-10-17
WO2002081385A3 WO2002081385A3 (fr) 2003-02-06

Family

ID=7680475

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001188 Ceased WO2002081385A2 (fr) 2001-04-05 2002-04-03 Agent de separation de metaux lourds dans des eaux polluees

Country Status (3)

Country Link
AU (1) AU2002302335A1 (fr)
DE (1) DE10116951B4 (fr)
WO (1) WO2002081385A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015413A1 (de) 2009-03-27 2010-09-30 B.P.S. Engineering Gesellschaft für Umwelt und Automatisierungstechnik mbH Adsorbens zur Entfernung von Schwermetallen aus Wässern

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20055072A0 (fi) * 2005-02-17 2005-02-17 Kemira Oyj Koostumuksia ja menetelmiä aineiden poistamiseksi vesiliuoksista

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS562847A (en) * 1979-06-22 1981-01-13 Hitachi Ltd Regeneration of uranium absorbent
DE3717848A1 (de) * 1987-05-27 1988-12-08 Rwk Rhein Westfael Kalkwerke Anorganisches material und verfahren zu seiner herstellung
US5639550A (en) * 1995-06-21 1997-06-17 Specialty Media Corporation Composite particulate material and process for preparing same
KR100455817B1 (ko) * 1996-08-14 2005-04-06 니혼 엔바이로 케미카루즈 가부시키가이샤 이온흡착제

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009015413A1 (de) 2009-03-27 2010-09-30 B.P.S. Engineering Gesellschaft für Umwelt und Automatisierungstechnik mbH Adsorbens zur Entfernung von Schwermetallen aus Wässern

Also Published As

Publication number Publication date
DE10116951B4 (de) 2014-02-27
AU2002302335A1 (en) 2002-10-21
WO2002081385A3 (fr) 2003-02-06
DE10116951A1 (de) 2002-10-24

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