GB2397299A - Composition comprising iron, manganese and phosphate compounds, for removing metals from solution - Google Patents

Composition comprising iron, manganese and phosphate compounds, for removing metals from solution Download PDF

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Publication number
GB2397299A
GB2397299A GB0329361A GB0329361A GB2397299A GB 2397299 A GB2397299 A GB 2397299A GB 0329361 A GB0329361 A GB 0329361A GB 0329361 A GB0329361 A GB 0329361A GB 2397299 A GB2397299 A GB 2397299A
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United Kingdom
Prior art keywords
substrate
manganese
composition
solution
iron
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Granted
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GB0329361A
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GB2397299B (en
GB0329361D0 (en
Inventor
Colin Robert Hughes
Thomas Charles Evans
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MINERAL SOLUTIONS Ltd
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MINERAL SOLUTIONS Ltd
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Publication of GB0329361D0 publication Critical patent/GB0329361D0/en
Publication of GB2397299A publication Critical patent/GB2397299A/en
Application granted granted Critical
Publication of GB2397299B publication Critical patent/GB2397299B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • B01J20/3236—Inorganic material layers containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0222—Compounds of Mn, Re
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0225—Compounds of Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt
    • B01J20/0229—Compounds of Fe
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
    • B01J20/0281—Sulfates of compounds other than those provided for in B01J20/045
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
    • B01J20/0288—Halides of compounds other than those provided for in B01J20/046
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
    • B01J20/0292—Phosphates of compounds other than those provided for in B01J20/048
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/0203—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04
    • B01J20/0274—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of metals not provided for in B01J20/04 characterised by the type of anion
    • B01J20/0296—Nitrates of compounds other than those provided for in B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • B01J20/106—Perlite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/3085—Chemical treatments not covered by groups B01J20/3007 - B01J20/3078
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3204—Inorganic carriers, supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
    • B01J20/3206—Organic carriers, supports or substrates
    • B01J20/3208—Polymeric carriers, supports or substrates
    • B01J20/321—Polymeric carriers, supports or substrates consisting of a polymer obtained by reactions involving only carbon to carbon unsaturated bonds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
    • B01J20/3234—Inorganic material layers
    • 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)

Abstract

A composition for removal of metals from solution the composition including manganese and iron oxides, hydroxides and oxyhydroxides, and phosphate. The composition may contain iron and manganese in the ratio of about 2 moles manganese to 1 mole iron and may contain phosphate in the amount 3 to 15% of the combined amount of manganese and iron. The composition may be coated onto a lightweight granular substrate such as perlite, plastic discs, polystyrene, glass fibre, charcoal or chitin. A coated substrate may be prepared by providing a substrate; wetting the substrate with a coating solution of manganese and iron salts containing phosphate and oxidising the solution to cause a coating comprising manganese and iron oxides, hydroxides and oxyhydroxides, and potassium to be precipitated onto the surface of the substrate.

Description

REMOVAL OF METALS FROM SOLUTION
The present invention relates to a composition for removal of metals, particularly although not exclusively, heavy metals, from solution, to a substrate coated with the composition, and to the manufacture and use of the composition and coated substrate.
There are many situations where it is desired to remove metals from solution.
Two important cases are the removal of heavy metal pollutants and the recovery of precious metals from water.
A number of different technologies are available for the removal of metal pollution from water. One method is the use of metal oxides to adsorb metals from the water. It is with this method that the present invention is concerned.
According to an aspect of the present invention there is provided a composition for removal of metals from solution the composition comprising manganese and iron oxides, hydroxides and oxyLydroxides, and phosphate.
According to another aspect of the present invention there is provided a substrate coated with a composition comprising manganese and iron oxides, hydroxides and oxyhydroxides and phosphate, the substrate being for use in the removal of metals from solution.
According to another aspect ofthe present invention there is provided a method of manufacture of a coated substrate for use in the removal of metals from solution comprising the steps of: providing a substrate; wetting the substrate with a solution of manganese and iron salts containing phosphate and oxidising the solution to cause a coating comprising manganese and iron oxides, hydroxides and oxyhydroxides, and potassium to be precipitated onto the surface of the substrate. -

Claims (20)

  1. Claims 1. A composition for removal of metals from solution the
    composition comprising manganese and iron oxides, hydroxides and oxyhydroxides, and phosphate.
  2. 2. A composition as claimed in clam I comprising iron and manganese in the ratio of about 2 moles manganese to 1 mole iron.
  3. 3. A composition as claimed in either claim I or 2 comprising phosphate in the amount 3 to 15% of the combined amount of manganese and iron.
  4. 4. A composition as claimed in any preceding claim comprising phosphate in the amount 3 to 9% of the combined amount of manganese and iron.
  5. 5. A substrate coated with a composition as claimed in any preceding claim, the substrate being for use in the removal of metals from solution.
  6. 6. A substrate as claimed in claim 5 comprising a granular material.
  7. 7. A substrate as claimed in either claim 5 or 6 comprising one or more of the following materials: perlite, plastic discs, polystyrene, glass fibre, charcoal and chitin.
  8. 8. A method of manufacture of a coated substrate as claimed in any of claims 5 to 7 comprising the steps of: providing a substrate; wetting the substrate with a coating solution of manganese and iron salts containing, phosphate and oxidising the solution to cause a coating comprising manganese and iron oxides, hydroxides and oxyhydroxides, and potassium to be precipitated onto the surface of the substrate.
  9. 9. A method as claimed in claim 8 wherein the substrate is wetted with a coating solution comprising a combination of magnesium and iron sulphates or nitrates or chlorides and sodium or potassium phosphate.
  10. 10. A method as claimed in either claim 8 or 9 wherein the substrate is be etched prior -
  11. 11 to wetting with the coating solution.
    1 1. A method as claimed in claim 10 wherein the substrate is etched by wetting with a sodium hydroxide solution.
  12. 12 A method as claimed in any of claims 8 to 1 I wherein the coating solution is oxidised by further wetting the wetted substrate with an oxidising agent.
  13. 13. A method as claimed in claim 12 wherein the oxidising solution is sodium or potassium hydroxide solution.
  14. 14. A method as claimed in either claim 12 or 13 wherein, after oxidising, the substrate is allowed to partially dry before a further application of coating solution followed by oxidising agent.
  15. 15. A method as claimed in claim 14 wherein the coated substrate is further etched before further application of coating solution.
  16. 16. A method as claimed in any of claims 8 to 15 wherein the substrate is dried in warm air to accelerate both drying and oxidisation of the solution.
  17. 17 A method as claimed in any of claims 8 to 15 wherein at least three applications of coating solution are made to build up the coating on the substrate.
  18. 18. The use of a composition as claimed in any of claims 1 to 4 or a substrate as claimed in any of claim 5 to 7 to clean up industrial pollution and/or naturally occurring pollution.
  19. 19. The use of a composition as claimed in any of claims 1 to 4 or a substrate as claimed in any of claim 5 to 7 to scavenge precious metals.
  20. 20. A coated substrate substantially as herein described in any of examples I to 3.
GB0329361A 2002-12-19 2003-12-19 Removal of metals from solution Expired - Fee Related GB2397299B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0229646A GB0229646D0 (en) 2002-12-19 2002-12-19 Removal of metals from solution

Publications (3)

Publication Number Publication Date
GB0329361D0 GB0329361D0 (en) 2004-01-21
GB2397299A true GB2397299A (en) 2004-07-21
GB2397299B GB2397299B (en) 2005-12-28

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GB0229646A Ceased GB0229646D0 (en) 2002-12-19 2002-12-19 Removal of metals from solution
GB0329361A Expired - Fee Related GB2397299B (en) 2002-12-19 2003-12-19 Removal of metals from solution

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Application Number Title Priority Date Filing Date
GB0229646A Ceased GB0229646D0 (en) 2002-12-19 2002-12-19 Removal of metals from solution

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168677A1 (en) * 2007-07-13 2010-03-31 Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Ferrimanganic composite oxide absorbent, method for preparing the same, and method for utilizing the same
CN104150587A (en) * 2014-08-29 2014-11-19 海南甘泉实业有限公司 Iron-removing and manganese-removing suspended filter material and preparation method thereof
CN105084489A (en) * 2015-09-10 2015-11-25 苏州凯欧曼新材料科技有限公司 Environment-friendly water treatment settling agent and preparation method thereof
US20180021752A1 (en) * 2014-06-16 2018-01-25 International Business Machines Corporation Methods and apparatus for controlling metals in liquids

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108946858B (en) * 2018-08-01 2021-08-20 江苏艾特克环境工程有限公司 Sewage nitrogen and phosphorus removal agent and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337749A (en) * 1998-05-28 1999-12-01 Gang Pan A method for simultaneously clearing up harmful algal blooms and harnessing organic pollutants to promote the primary productivity in the sea
WO2003089112A1 (en) * 2002-04-17 2003-10-30 Watervisions International, Inc. Reactive compositions for fluid treatment

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2337749A (en) * 1998-05-28 1999-12-01 Gang Pan A method for simultaneously clearing up harmful algal blooms and harnessing organic pollutants to promote the primary productivity in the sea
WO2003089112A1 (en) * 2002-04-17 2003-10-30 Watervisions International, Inc. Reactive compositions for fluid treatment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2168677A1 (en) * 2007-07-13 2010-03-31 Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences Ferrimanganic composite oxide absorbent, method for preparing the same, and method for utilizing the same
EP2168677A4 (en) * 2007-07-13 2011-05-04 Res Ct Eco Environmental Scien Ferrimanganic composite oxide absorbent, method for preparing the same, and method for utilizing the same
US8207087B2 (en) 2007-07-13 2012-06-26 Research Center For Eco-Environmental Sciences, Chinese Academy Of Sciences Method for making ferric and manganese binary oxide based adsorbent
US20180021752A1 (en) * 2014-06-16 2018-01-25 International Business Machines Corporation Methods and apparatus for controlling metals in liquids
US10525442B2 (en) * 2014-06-16 2020-01-07 International Business Machines Corporation Methods and apparatus for controlling metals in liquids
CN104150587A (en) * 2014-08-29 2014-11-19 海南甘泉实业有限公司 Iron-removing and manganese-removing suspended filter material and preparation method thereof
CN105084489A (en) * 2015-09-10 2015-11-25 苏州凯欧曼新材料科技有限公司 Environment-friendly water treatment settling agent and preparation method thereof

Also Published As

Publication number Publication date
GB2397299B (en) 2005-12-28
GB0329361D0 (en) 2004-01-21
GB0229646D0 (en) 2003-01-22

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20071219