CN103189318A - Purification material for toxic matter-containing water and production method for same - Google Patents

Purification material for toxic matter-containing water and production method for same Download PDF

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Publication number
CN103189318A
CN103189318A CN2011800513007A CN201180051300A CN103189318A CN 103189318 A CN103189318 A CN 103189318A CN 2011800513007 A CN2011800513007 A CN 2011800513007A CN 201180051300 A CN201180051300 A CN 201180051300A CN 103189318 A CN103189318 A CN 103189318A
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Prior art keywords
water
cleaning material
hydrotalcite
liquid separation
hazardous substance
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二瓶智也
林浩志
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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    • 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
    • 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
    • B01J20/04—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising compounds of alkali metals, alkaline earth metals or magnesium
    • B01J20/041—Oxides or hydroxides
    • 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
    • B01J20/08—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 comprising aluminium oxide or hydroxide; comprising bauxite
    • 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
    • B01J20/3231—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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F5/00—Compounds of magnesium
    • C01F5/02—Magnesia
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
    • C01F7/784—Layered double hydroxide, e.g. comprising nitrate, sulfate or carbonate ions as intercalating anions
    • C01F7/785—Hydrotalcite
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/85—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by XPS, EDX or EDAX data
    • 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
    • C02F2101/105—Phosphorus 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
    • C02F2101/12—Halogens or halogen-containing compounds
    • C02F2101/14—Fluorine or fluorine-containing 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
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C02F2101/206—Manganese or manganese 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
    • 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
    • C02F2103/08—Seawater, e.g. for desalination

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Water Treatment By Sorption (AREA)
  • Removal Of Specific Substances (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

Provided is a purification material comprising a hydrotalcite formed on the surface of a magnesium oxide. The purification material removes toxic matter to outside a system, by being added to water containing a toxic matter, capturing the toxic matter into the hydrotalcite, and by being solid/liquid separated with the toxic matter captured therein.

Description

Material and manufacture method thereof are handled in the water purification that contains hazardous substance
Technical field
The present invention relates to a kind of water purification that contains hazardous substance and handle material and manufacture method thereof, in more detail, relate to a kind of cleaning material and manufacture method thereof, this cleaning material is for the composition of removing the purifying treatment of these objectionable impuritiess from the waste water that contains objectionable impuritiess such as fluorine, boron, nitrogen compound, phosphorus, heavy metal class etc., wherein, captured the solid-liquid separation excellence of the cleaning material of objectionable impurities, this cleaning material sedimentation at short notice removes objectionable impurities.
The application advocates the right of priority based on the Japanese patent application of on October 29th, 2010 application 2010-244773 number, and its content is applied in this specification sheets.
Background technology
The known method that has objectionable impurities contained in the draining of making to capture and remove in layered double-hydroxide in the past.For example, record following treatment process in the open 2003-285076 communique (patent documentation 1) of Japanese Patent: in fluorine-containing draining, add the divalent metal ion and become layered double-hydroxide next life with 3 valence metal ions, and fluorine is captured interlayer in this layered double-hydroxide.
Record following treatment process in the international open WO2005-087664 communique (patent documentation 2): will contain aluminum ion and mix with the basic solution that contains alkali with the acidic solution of magnesium ion, after acidic solution and mixing of basic solution finish, do not stay timed interval ground not remove moisture immediately or neutralize, thereby form with general formula: Mg 2+ 1-XAl 3+ X(OH) 2(A N-) X/NMH 2O(A N-Be negatively charged ion) hydrotalcite-like substance of expression, fluorine etc. captured in this material and fixing.
Patent documentation 1: the open 2003-285076 communique of Japanese Patent
Patent documentation 2: international open WO2005-087664 communique
Above-mentioned treatment process in the past is to generate layered double-hydroxide such as the hydrotalcite method of defluorination of making a return journey, but the settleability of the mud that generates is poor, has the problem that the treatment time elongates.And the treatment process of patent documentation 1 is conceived to the recovery of fluorine-containing emulsifier, and is still indeterminate about the ability of removing the heavy metal class.And, in the treatment process of patent documentation 2, by with the control of the crystallite dimension of hydrotalcite-like substance 20nm with under improve the anionresin energy, demonstrate adsorption effect to chromium about heavy metal ion, but still indeterminate about the ability of removing the heavy metal class beyond the chromium.
Summary of the invention
The invention solves the problem of the settleability difference of the mud that in above-mentioned treatment process in the past, generates, provide a kind of adsorption effect to fluorine and cleaning material and the manufacture method thereof of the settleability excellence of the mud that generates.And, provide the removal effect of a kind of fluorine, nitrogen compound, phosphorus, heavy metal class also excellent, cleaning material and the manufacture method thereof of the removal effect excellence of objectionable impuritiess such as preferred fluorine, boron, nitrogen compound, phosphorus, heavy metal class.
The present invention relates to a kind of water purification that contains hazardous substance that is constituted by following technical scheme and handle material.
The 1st form of the present invention is for forming the cleaning material that hydrotalcite forms at mgo surface, be to make an addition in the water that contains hazardous substance objectionable impurities is captured in this hydrotalcite, and carry out solid-liquid separation with the state that has captured objectionable impurities, thereby material is handled in the water purification that contains hazardous substance that objectionable impurities is removed outside system.
The 2nd form of the present invention is that material is handled in the related water purification that contains hazardous substance of above-mentioned the 1st form, is to make magnesium oxide and aluminum soluble salt react under aqueous solution neutral and alkali condition at mgo surface to form the water purification that the contains hazardous substance processing material that hydrotalcite forms.
The present invention relates to a kind of water purification that contains hazardous substance that is constituted by following technical scheme and handle the manufacture method of material.
The 3rd form of the present invention is the manufacture method with the water purification that contains hazardous substance processing material of following operation: the composition that adds hydrotalcite in water is the operation of magnesium oxide and aluminum soluble salt; Reaction process makes described magnesium oxide, aluminum soluble salt and water react the form slurry in next life under alkaline condition, and described slurry contains the water purification that contains hazardous substance that forms hydrotalcite on above-mentioned magnesian surface handles material; And solid-liquid separation process, carry out solid-liquid separation by the cleaning material sedimentation in the described slurry that makes generation, thereby reclaim this cleaning material.
The 4th form of the present invention is to handle in the manufacture method of material in the related water purification that contains hazardous substance of above-mentioned the 3rd form, part or all of the cleaning material of solid-liquid separation is returned to reaction process, and in the formation of hydrotalcite, utilizes the water purification that contains hazardous substance of the processing material of foldback to handle the manufacture method of material.
Cleaning material of the present invention is in the settleability excellence of purifying treatment material after-treatment, when for example after using cleaning material of the present invention that the water that contains hazardous substance is handled, leaving standstill, stable volume after 30 minutes is below 40%, sedimentation at short notice, therefore can carry out solid-liquid separation at short notice, and can be with the solid-liquid separation tank miniaturization.
The fluorine removal effect excellence of cleaning material of the present invention can be reduced to the fluorine concentration in the draining below the draining benchmark [the commons waters beyond the fluorine 8mg/L(marine site), fluorine 15mg/L(marine site)] like a cork.And, in the manufacture method, part or all of the cleaning material of solid-liquid separation is returned to the cleaning material that reaction process makes further improves the removal effect of fluorine, and the fluorine concentration in the draining can be reduced to like a cork environmental criteria (0.8mg/L is following).And, objectionable impuritiess such as boron, nitrogen compound, phosphorus, weight metal species and fluorine together can be removed.
Description of drawings
Figure 1A is the SEM photo in the cross section of cleaning material of the present invention.
Figure 1B is the composition analysis figure of the cleaning material inside (B part) of Figure 1A.
Fig. 1 C is the composition analysis figure of the cleaning material near surface (C part) of Figure 1A.
Fig. 2 is the settleability of photo represent to(for) the manufacture method of cleaning material of the present invention and scavenging material in the past.
Fig. 3 is the process picture sheet of an embodiment of the manufacture method of expression cleaning material involved in the present invention.
Fig. 4 is the process picture sheet of another embodiment of the manufacture method of expression cleaning material involved in the present invention.
Fig. 5 is the process picture sheet of an example that expression utilizes the treatment process of cleaning material of the present invention.
Fig. 6 is the XRD spectra of cleaning material involved in the present invention.
Embodiment
Below, according to embodiment the present invention is specifically described.
Cleaning material of the present invention is to form the cleaning material that hydrotalcite forms at alumina surface, be to make an addition in the water that contains hazardous substance objectionable impurities is captured in this hydrotalcite, and carry out solid-liquid separation with the state that has captured objectionable impurities, thereby material is handled in the water purification that contains hazardous substance that objectionable impurities is removed outside system.
The employed water general reference that contains hazardous substance of cleaning material of the present invention contains the water of objectionable impurities, comprise that nature produces and the artificial various waste water that produce or draining etc., for example with plant drainage or sewage, seawater, river water, lakes and marhshes or Chi Shui, surface pond, the water in damming districts such as river, underground flowing water or ponding, the water of closed conduit etc. contains the water of objectionable impurities, perhaps utilizes reverse osmosis membrane and the electrodialysis etc. will be by the purification draining of objectionable impurities Contaminated soil, seawater or separate (desalting treatment) from a final higher draining of handling of salt densities such as water seepage and become condensed water after primary water (fresh water) and the condensed water etc.
As the objectionable impurities of handling object for example attach most importance to metal species, fluorine, boron, nitrogen, phosphorus etc.The heavy metal class is cadmium, lead, copper, zinc, iron, nickel, selenium, sexavalent chrome, arsenic, manganese, antimony etc.Cleaning material of the present invention is for any removal effect that has excellence more than a kind or 2 kinds of contained these objectionable impuritiess in the water that contains hazardous substance.
Further comprise halide ions, various hydracid (hydracid, high hydracid, halous acid, hypohalous acid etc.), phosphofluoric acid ion (PF in the objectionable impurities 6 -), boron fluoride ion (BF 4 -), silicofluoride ion (SIF 6 2-), organic acid, suspended matter (SS) and organism etc.Cleaning material of the present invention is for the removal effect that has excellence more than a kind or 2 kinds of these contained in waste water objectionable impuritiess.
Cleaning material of the present invention is formed with hydrotalcite at mgo surface.This structure is shown in the SEM photo of Figure 1A, will be shown in Figure 1B by the internal component that EDX analyzes this cleaning material that obtains, the composition of surface portion is shown in Fig. 1 C.As can be known the composition of cleaning material inside (the B part of Figure 1A) as shown in Figure 1B, the magnesium component overwhelming is in the majority to be magnesium oxide.On the other hand, the composition of the near surface of cleaning material (the C part of Figure 1A) detects the peak value of magnesium and aluminium shown in Fig. 1 C as can be known, is hydrotalcite [general formula: Mg 2+ 1-XAl 3+ X(OH) 2(A N-) X/NMH 2O(A N-Be negatively charged ion)] composition.
In addition, therefore magnesium oxide hydration and become magnesium hydroxide in manufacturing process sometimes also can form hydrotalcite on the coexisting substances surface of magnesium oxide and magnesium hydroxide.
Hydrotalcite has the laminate structure that contains water molecules at interlayer, has the character that captures negatively charged ion in order to ensure electric neutrality at interlayer, when contacting with the water that contains hazardous substance, the objectionable impurities of negatively charged ion such as the boron of contained fluorine, organic acid or oxygen anion system, nitrogen, phosphorus, selenium, sexavalent chrome, arsenic, antimony is caught to combine in interlayer in this water.
And, to replace by the magnesium of formation hydrotalcite or a part and the cationic heavy metal class of aluminium, harmful heavy metal classes such as cadmium, lead, copper, zinc, iron, nickel, manganese are captured.And suspended matter (SS) is captured with the cleaning material cohesion that contains hydrotalcite, and organism is adsorbed in the surface of the cleaning material that contains hydrotalcite and is captured.Therefore, capture these objectionable impuritiess by cleaning material of the present invention being devoted in waste water etc., and with precipitation (mud) solid-liquid separation that generates, thereby can remove these objectionable impuritiess effectively.
[using method]
Cleaning material of the present invention removes objectionable impurities by contacting with the water that contains hazardous substance.As its contact method (using method), can be continous way and also can be intermittent type, form as treatment unit can be the method for using steel basin that cleaning material is contacted with waste water in groove, cleaning material is filled in the method that packed column contacts with waste water, or uses fluidized-bed to make cleaning material flow the usual methods such as method that contact with waste water.And the use-pattern of cleaning material can be selected according to treatment system, can be with pulp-like or use such as Powdered.
Cleaning material of the present invention all can use in arbitrary liquid property of the acidity of pH1～13, neutrality, alkalescence, preferred pH3～11.And use temperature also can be used in normal temperature without limits.
Cleaning material after the processing can reclaim by carrying out solid-liquid separation.Cleaning material of the present invention has the structure that forms hydrotalcite at mgo surface, so the settleability of the processing material after the purifying treatment is preferable, can reclaim like a cork at short notice.
For example as shown in Figure 2, after using cleaning material of the present invention that the water that contains hazardous substance is handled, moving to graduated cylinder left standstill 30 minutes, the volume of the slurry when then beginning to leave standstill is 2300mL, but the throw out volume after leaving standstill becomes about 550mL, stable volume becomes below 40% at short notice, preferably becomes below 25%.Wherein, stable volume refers to the index that calculates according to following formula [1].Stablizing the little side's expression of volume can be at short notice with mud (having captured the cleaning material of objectionable impurities) solid-liquid separation.
(through the throw out volume behind the certain hour)/(the cleaning material slurry volume at initial stage) * 100 ... [1]
If use cleaning material of the present invention, it is less then to stablize volume, can be at short notice with the mud solid-liquid separation.If before being directed in solid-liquid separation tank, add flocculation agent, then can in the shorter time, carry out solid-liquid separation.Flocculation agent can use the polymer coagulant of inorganic flocculant or anionic property, cationic, nonionic, both sexes.
In addition, manufacture method by in the past, namely use soluble magnesium salt (magnesium chloride etc.) to replace magnesium oxide and aluminum soluble salt together to make an addition in the water and further add sodium hydroxide and be adjusted into the cleaning material that alkalescence generates, if moving to graduated cylinder after utilizing it that water that contains hazardous substance is handled left standstill 30 minutes, then as shown in Figure 2, slurry volume when beginning to leave standstill is 2300mL, but the throw out volume after leaving standstill is about 2200mL, precipitates hardly about 30 minutes.
The cleaning material of the present invention that reclaims can use repeatedly.If the removal ability of objectionable impurities descends, then be replaced with new cleaning material and get final product.And the cleaning material that has used can be as the cement raw material regeneration.
[manufacture method]
Cleaning material of the present invention can be by following operation manufacturing: the composition that (A) adds hydrotalcite in water is the operation of magnesium oxide and aluminum soluble salt; (B) reaction process makes magnesium oxide, aluminum soluble salt and water react the form slurry in next life under alkaline condition, and described slurry contains the cleaning material that forms hydrotalcite at above-mentioned mgo surface; Reach (C) solid-liquid separation process, carry out solid-liquid separation and recovery by making cleaning material sedimentation from the slurry that generates.
Below, the manufacture method of cleaning material of the present invention is described.
[interpolation operation]
The composition that adds hydrotalcite in water is magnesium oxide and aluminum soluble salt, makes the magnesium oxide of part dissolving and aluminum soluble salt react to form hydrotalcite at mgo surface under alkaline condition.
Magnesian most of as dissolving part and residual, the part dissolving on surface and become the composition source of hydrotalcite, and the performance of the magnesium oxide of dissolving is as the effect of alkaline agent.
As magnesium oxide, except the magnesium oxide monomer, can also add as rhombspar [CaMg(CO 3) 2] burned material is the same contains magnesian material in the part of composition, or be not limited to Ca and together contain magnesian material with other compositions.
As aluminum soluble salt, for example can use poly aluminium chloride, Tai-Ace S 150 (sulfuric acid バ Application De), aluminum chloride, aluminum nitrate etc.And, as aluminum soluble salt, can utilize high density to contain the waste liquid (the recovery waste liquid of noble metal catalyst, be dissolved with the liquid of metallic aluminium etc.) of aluminium.
In the water that contains hazardous substance, add in the operation of magnesium oxide and aluminum soluble salt, in adding groove, aluminum soluble salt and magnesium oxide can be made an addition in the water, and it is directed in the reactive tank, also can in adding groove, aluminum soluble salt be made an addition in the water, it is directed in the reactive tank, in reactive tank, adds magnesium oxide and add pH adjustment agent as required.And, also can be directed at Jiang Shui and add water and aluminum soluble salt in the pipeline of reactive tank.
[reaction process]
If in water, add magnesium oxide and aluminum soluble salt, make its (preferred pH7～11) reaction under alkaline condition, then magnesium oxide is therefore most of residual as not dissolving part owing to being difficult to dissolving, but surface local dissolving, the magnesium of this stripping and reactive aluminum and form hydrotalcite [general formula: Mg at undissolved mgo surface 2+ 1-XAl 3+ X(OH) 2(A N-) X/NMH 2O(A N-Be negatively charged ion)].
The acquisition cleaning material is scattered in the slurry (cleaning material slurry) in the water in reaction process.
In reaction process, can add pH as required and adjust agent.Adjust agent as pH, can enumerate alkali or acid such as sulfuric acid, hydrochloric acid such as sodium hydroxide, calcium hydroxide, calcium oxide.Thus, control is in pH7～11.The adjustment of pH can be before reaction, in the reaction, carry out after the reaction, but from the viewpoint of the formation that promotes hydrotalcite, preferably carry out in reaction or after the reaction.
[solid-liquid separation process]
The slurry that generates is guided to solid-liquid separation process make the cleaning material sedimentation, thereby carry out solid-liquid separation.The cleaning material that manufacturing method according to the invention generates has the structure that forms hydrotalcite at undissolved mgo surface, so settleability is preferable.
As required the cleaning material that reclaims is dehydrated.In dehydrating processing, can use normally used dewatering unit or drying installation.
[foldback operation]
In above-mentioned manufacture method, preferably part or all of the cleaning material of solid-liquid separation is returned to reaction process, in the formation of hydrotalcite, utilize the cleaning material of foldback.Be back to the generation that reaction process promotes hydrotalcite by part or all that makes cleaning material, and objectionable impuritiess such as fluorine, boron, nitrogen compound, phosphorus, harmful heavy metal class are captured in cleaning material morely, therefore improve their removal effect.
In addition, for the cleaning material of solid-liquid separation, utilize the difference of weight, proportion or settling velocity will be condensed into the more cleaning material of magnesium oxide amount and be returned to reaction process and get final product.For example and since the more cleaning material of magnesium oxide amount than other cleaning materials heavier and rapid subsidence, so can collect the cleaning material at sedimentation initial stage and be condensed into the more cleaning material of magnesium oxide amount.Be returned to reaction process by the cleaning material that the magnesium oxide amount is more, can promote the generation of hydrotalcite.
The manufacturing system of cleaning material of the present invention is shown in Fig. 3 and Fig. 4.The summary structure of device and the manufacturing process of cleaning material are arranged shown in Fig. 3,4.
The medicament that be provided with in water the interpolation groove 10 that adds medicament in the illustrated manufacturing installation, makes interpolation react to generate cleaning material reactive tank 30, and from the slurry that contains cleaning material that generates reclaiming clean handle the solid-liquid separation tank 40 of material, these add grooves 10, reactive tank 30 and solid-liquid separation tank 40 and connect successively by pipeline 50.Be connected with the escape route 51,52 that the water that will separate and cleaning material are discharged on the solid-liquid separation tank 40 respectively, part or all that is connected with the cleaning material that will separate on the escape route 52 of cleaning material is returned to the foldback pipeline 53 of reactive tank 30.In the manufacturing system shown in Figure 4,2nd add groove 20 being provided with of foldback pipeline 53 midway.The cleaning material that produces reclaims by escape route 52, and implements processed as required.
Add groove 10 and be provided with the supply line 60 of water and the supply line 61 of aluminum soluble salt.In addition, can omit and add groove 10 and direct connecting pipeline 60 and pipeline 61, and in pipeline, add aluminum soluble salt.In the manufacturing system of Fig. 3, reactive tank 30 is provided with the supply line 63 of magnesian supply line 62 and pH adjustment agent.And in the treatment system of Fig. 4, the 2nd adds groove 20 is provided with magnesian supply line 62.
Add in the groove 10, add aluminum soluble salts such as poly aluminium chloride in water, this is directed in the reactive tank 30.Further add magnesium oxide via pipeline 62.Add PH via pipeline 63 again and adjust agent, the reactive tank inner control is in pH7～11.This reactive tank 30 can be open system and also can be closed system, but owing to may disturb the removal of objectionable impurities because of the absorption of carbonic acid gas, therefore preferred cleaning material is the structure that is difficult to absorbing carbon dioxide.The reactive tank of usually preferred closed system.
In the reactive tank 30, the part of mgo surface dissolving is also reacted under alkaline condition with aluminium and is generated hydrotalcite at mgo surface, thereby forms cleaning material of the present invention (with reference to figure 6(A)).During the processing of the water that cleaning material of the present invention is applied to contain hazardous substance, objectionable impurities is caught to combine in this hydrotalcite, by the cleaning material solid-liquid separation that will capture objectionable impurities objectionable impurities is removed outside system.
The formation cleaning material is scattered in the slurry in the water in reactive tank 30.In the solid-liquid separation tank 40, make the cleaning material sedimentation with the slurry solid-liquid separation.In addition, can before being directed in solid-liquid separation tank 40, in slurry, add flocculation agent.Can connect the flocculation agent supply line and pipeline 50 adds flocculation agent in pipeline, flocculation agent also can be set add groove and via pipeline 50 cleaning material is added this flocculation agent and add in groove, and add flocculation agent via the flocculation agent supply line.And, be returned in the reactive tank 30 via pipeline 53 by the cleaning material of solid-liquid separation, and can come further to generate on the surface of cleaning material hydrotalcite (with reference to figure 6(B) by the reaction of magnesium oxide and aluminum soluble salt).The cleaning material of solid-liquid separation is returned to the formation that promotes hydrotalcite in the reactive tank by inciting somebody to action.Its result when this cleaning material being used for the processing of the water contain hazardous substance, can capture objectionable impurities morely, therefore improves the objectionable impurities removal effect.
Above-mentioned manufacturing installation for example can be made as can be vehicle-mounted, maybe can be separated into the pocket device that adds groove or unit such as reactive tank and solid-liquid separation tank.
When using the cleaning material of so making, can reduce objectionable impurities contained in the water (former water) that contains hazardous substance or the pre-treatment of interfering substance in advance, and, can carry out aftertreatment to the processing water after the purifying treatment.In addition, though interfering substance refers to itself also non-deleterious substance, disturb the material of the objectionable impurities removal effect of cleaning material of the present invention.
With use cleaning material of the present invention treatment process one be illustrated in Fig. 5.Illustrated treatment process is the example that comprises pre-treatment and aftertreatment, and former water is directed to after pre-treatment in the treatment trough 70.Adding in this treatment trough 70 has cleaning material of the present invention, and objectionable impurities is caught to combine in cleaning material at this.The slurry that extracts from treatment trough 70 is directed in the solid-liquid separation tank 71, and the processing water that has separated is directed to aftertreatment.On the other hand, the mud (cleaning material that has used) of precipitation is extracted and is reused as required in solid-liquid separation tank 71.
[pre-treatment]
Particularly, for example, if the concentration of contained heavy metal class (cadmium, lead, copper, zinc, iron, nickel, manganese, sexavalent chrome, arsenic etc.) is higher than 20mg/L in the processed former water, then captured the structure division disintegration of the hydrotalcite of heavy metal class sometimes, the removal effect of objectionable impuritiess such as heavy metal class becomes insufficient.Therefore also can reduce the pre-treatment of the heavy metal concentration in the former water.Do not limit the method for pre-treatment.For example, can add neutralizing agent (NaOH, Ca(OH) 2Deng) pH of former water is adjusted into 5～10 scope, and generate the oxyhydroxide of heavy metal, it is carried out coagulative precipitation handle, be lower than 10mg/L thereby the heavy metal concentration of former water is made as.Perhaps, also can in former water, add after aluminium salt or the molysite, add neutralizing agent (NaOH, Ca(OH) 2Deng) PH of former water is adjusted into 5～10 scope, and generate precipitation of hydroxide, in this precipitation, make the heavy metal co-precipitation, its solid-liquid separation is made as the heavy metal concentration of former water is lower than 10mg/L again.
If the phosphate ion of former water is higher than 50mg/L as phosphorus concentration, then phosphate ion and other objectionable impuritiess are competed and are adsorbed on hydrotalcite, reduce the removal effect of other objectionable impuritiess sometimes.Therefore, can reduce the pre-treatment of the phosphate ion concentration in the former water.Do not limit the method for pre-treatment.For example, in former water, add calcium salt (Ca(OH) 2Deng) generate calcium phosphate salt and remove, be lower than 5mg/L and get final product thereby the phosphate ion of former water is made as phosphorus concentration.
If the nitrate ion of former water is higher than 200mg/L as nitrogen concentration, then nitrate ion and other objectionable impuritiess are competed and are adsorbed on hydrotalcite, reduce the removal effect of other objectionable impuritiess sometimes.Therefore, can reduce the pre-treatment of the nitrate ion concentration in the former water.Do not limit the method for pre-treatment.For example, carry out a biological disposal upon (anaerobic denitrifying method etc.) nitrate ion of former water is made as nitrogen concentration is lower than 200mg/L and gets final product.
And if the borate ion of former water is higher than 100mg/L as boron concentration, then borate ion and other objectionable impuritiess are competed and are adsorbed on hydrotalcite, reduce the removal effect of other objectionable impuritiess sometimes.Therefore, can reduce the pre-treatment of the borate ion concentration in the former water.Do not limit the method for pre-treatment.For example, come the attracts boron acid ion at the logical former water of liquid of the resin with methyl glucoside amido, be lower than 100mg/L and get final product thereby the borate ion of former water is made as boron concentration.
And if the fluorine concentration of former water is higher than 50mg/L, then the aequum of cleaning material increases, and therefore input cleaning material amount increases sometimes.Therefore, can reduce the pre-treatment of the fluorine concentration in the former water.Do not limit the method for pre-treatment.For example, add the Calcium Fluoride (Fluorspan) that calcium salt generates microsolubility, its solid-liquid separation is made as fluorine concentration is lower than 50mg/L and gets final product.
And, if the concentration of contained suspended matter (SS) is higher than 60mg/L in the former water, then having captured the structure partial disintegration of the hydrotalcite of suspended matter sometimes, the removal effect of objectionable impurities becomes insufficient.Therefore, can reduce the pre-treatment of the suspended matter concentration in the former water.Do not limit the method for pre-treatment.For example, add inorganic flocculant or polymer coagulant with the suspended matter precipitate and separate, be lower than 20mg/L thereby the concentration of the suspended matter of former water is made as.
If contained organic concentration is higher than 200mg/L as COD in the former water, then captured the structure partial disintegration of organic hydrotalcite sometimes, the removal effect of objectionable impurities becomes insufficient.Therefore, can reduce the pre-treatment of the organic concentration in the former water.Do not limit the method for pre-treatment.For example, by biological treatment (activated sludge process etc.) or promotes oxidn method (ultraviolet oxidation or photocatalyst etc.) organic concentration of former water is made as COD and is lower than 80mg/L and gets final product.
If in pretreatment procedure, remove contained interference component in the former water, then can further improve treatment effect.As interference component, the silicon-dioxide of sulfate ion, sulfurous acid ion, chloride ion, carbonic acid ion, dissolving or silicic acid ion etc. are arranged.
For example, if contained sulfate ion concentration is higher than 1500mg/L in the former water, then sulfate ion and objectionable impurities are competed and are adsorbed on hydrotalcite, reduce the removal effect of objectionable impurities sometimes.Therefore, can reduce the pre-treatment of the sulfate ion concentration in the former water.Do not limit the method for pre-treatment.For example, in former water, add the vitriol that Ca salt or Ba salt generate microsolubility, its solid-liquid separation is reduced sulfate ion concentration.Sulfate ion can be reduced to when using Ca salt and be lower than 1000mg/L.Sulfate ion can be reduced to when using Ba salt and be lower than 5mg/L.
If the sulfurous acid ion concentration of former water is higher than 50mg/L, therefore then sulfurous acid ion and aluminum ion reaction needs more aluminium addition sometimes.And sulfurous acid ion and objectionable impurities ion are competed and are adsorbed on hydrotalcite, reduce the removal effect of objectionable impurities sometimes.Therefore, can reduce the pre-treatment of the sulfurous acid ion concentration in the former water.Do not limit the method for pre-treatment.For example, in former water, add oxygenant such as hydrogen peroxide sulfurous acid ion is oxidized to sulfate ion, be lower than 10mg/L and get final product thereby the sulfurous acid ion of former water is made as.
If the chloride ion concentration of former water is higher than 2000mg/L, then chloride ion and objectionable impurities are competed and are adsorbed on hydrotalcite, reduce the removal effect of objectionable impurities sometimes.Therefore, can reduce the pre-treatment of the chloride ion concentration in the former water.Do not limit the method for pre-treatment.For example, by electrolytic decomposition chlorine being gasified removes, or handles chloride ion concentration is made as by films such as reverse osmosis method or electroosmose processs and be lower than 1000mg/L and get final product.
If the carbonic acid ionic concn of former water is higher than 500mg/L, then carbonic acid ion and objectionable impurities are competed and are adsorbed on hydrotalcite, reduce the removal effect of objectionable impurities sometimes.Therefore, can reduce the pre-treatment of the carbonic acid ionic concn in the former water.Do not limit the method for pre-treatment.For example, carbonic acid ion gas is loose former water aeration, or add the carbonate that Ca salt generates microsolubility and carry out solid-liquid separation, be lower than 50mg/L and get final product thereby the carbonic acid ionic concn is made as.
If silicon-dioxide or the silicic acid ion of the dissolving of former water are higher than 20mg/L as Si concentration, then captured the structure partial disintegration of the hydrotalcite of the silicon-dioxide of dissolving or silicic acid ion sometimes, the removal effect of objectionable impurities becomes insufficient.Therefore, can reduce the pre-treatment of the concentration of the silicon-dioxide of the dissolving in the former water or silicic acid ion.Do not limit the method for pre-treatment.For example, add molysite or aluminium salt, and add neutralizing agent (NaOH, Ca(OH) 2Deng) pH of former water is adjusted into 5～10 scope hydrate in next life precipitation, in this precipitation, make silicon-dioxide or the co-precipitation of silicic acid ion of dissolving, its solid-liquid separation is made as the silicon-dioxide of the dissolving of former water or silicic acid ion is lower than 10mg/L and gets final product as Si concentration.
[postprocessing working procedures]
Sometimes residual in the liquid component that separates in solid-liquid separation process (processing water) have organism, suspended matter or a nitrogen compound, and the pH that handles water sometimes is more than 9.Therefore, but the postprocessing working procedures of set handling water.The method of aftertreatment is unqualified.(with reference to figure 5).
For handling contained organism in the water, for example by biological treatment (activated sludge process etc.) or promotes oxidn method (ultraviolet oxidation or photocatalyst etc.) organic COD concentration is reduced to and is lower than 80mg/L and gets final product.And, for handling contained suspended matter (SS) in the water, for example add inorganic flocculant or polymer coagulant with the suspended matter precipitate and separate, and the concentration of suspended matter is made as is lower than 20mg/L and gets final product.And for handling contained nitrogen compound in the water, for example carry out a biological disposal upon (nitration denitrification method etc.) are reduced to nitrogen concentration and are lower than 60mg/L and get final product.
Sometimes the pH that handles water becomes more than 9, therefore when pH is higher in handling water interpolation sulfuric acid or hydrochloric acid wait to carry out neutralizing treatment and get final product to become pH6～8.
[embodiment]
Below, embodiments of the invention and comparative example are together illustrated.In addition, utilize the ion electrode method to measure fluorine concentration.Utilize the ICP emission spectrometry method to measure boron concentration, cadmium concentration, lead concentration, chromium (VI) concentration and arsenic concentration.Utilize hydride generation aas determination selenium concentration.
[embodiment 1]
According to the following cleaning material that produces of manufacturing system shown in Figure 3.At first, water is directed in the interpolation groove 10, adds poly aluminium chloride so that the aluminum concentration in the water becomes 240mg/L.It is directed in the reactive tank 30.Afterwards, in reactive tank 30 mixed phase for water be 1g/L amount magnesium oxide with added the water of poly aluminium chloride and stirred 20 hours, it is reacted under 20 ℃ of temperature.After the reaction, adjust agent as pH and add sodium hydroxide and be adjusted into after pH8.5～9.5 restir 2 hours.The slurry that will contain to some extent the cleaning material that generates is directed in solid-liquid separation tank 40(thickner) in leave standstill and made the cleaning material sedimentation in 20 hours.After the solid-liquid separation, throw out is dehydrated to obtain cleaning material.The A that the results are shown in Fig. 6 that will measure this cleaning material by the wide-angle x-ray diffraction.As shown, be the cleaning material of the present invention that forms hydrotalcite at mgo surface.
In the simulated wastewater that contains the concentration of narmful substance shown in the table 1, add this cleaning material of 1%, stir and carry out solid-liquid separation after 2 hours and measure concentration of narmful substance in the solution.The table 1 that the results are shown in this moment.As shown in table 1, the fluorine concentration of handling in the water can be handled to environmental criteria (below the 0.8mg/L) by cleaning material of the present invention.And, can also significantly reduce the concentration of other objectionable impuritiess.
[table 1]
Objectionable impurities Former water (mg/L) Handle water (mg/L)
Fluorine 10 0.7
Boron 10 1.6
Cadmium 2 0.01
Plumbous 2 0.01
Chromium (VI) 2 0.01
Arsenic 2 0.01
Selenium 2 0.01
[embodiment 2]
According to the following cleaning material that produces of manufacturing system shown in Figure 4.At first, water is directed in the interpolation groove 10, adds poly aluminium chloride so that the aluminum concentration in the water becomes 240mg/L.It is directed in the reactive tank 30.On the other hand, all amounts of the cleaning material that separates in solid-liquid separation tank 40 are returned to the 2nd add in the groove 20, at this, add the magnesium oxide of 1g/L with respect to the water of 1L.This cleaning material is back to mix with the water that has added poly aluminium chloride in the reactive tank 30 and stirs 30 minutes, and it was reacted 30 minutes under 20 ℃ of temperature.After the reaction, after adjusting agent and add sodium hydroxide and be adjusted into pH8.5～9.5 as pH, the cleaning material that generates is directed in solid-liquid separation tank 40(thickner) in leave standstill and made its sedimentation in 20 hours.In addition, before being directed in solid-liquid separation tank 40, the anionic property polymer coagulant of 2mg/L is made an addition in the cleaning material slurry that generates.After the solid-liquid separation, be directed in the 2nd as all amounts of above-mentioned cleaning material with this separation and add in the groove 20, add the magnesium oxide of 1g/L and be back in the reactive tank 30 with respect to the water of 1L, carry out the generation of 8 cleaning materials repeatedly.At this moment, obtain the cleaning material slurry of 150mL solid-liquid concentration 120g/L.
Make the part of this slurry dry and carry out the result that the wide-angle x-ray diffraction is measured, obtain the frequency spectrum shown in the B of Fig. 6.As shown, be the cleaning material of the present invention that forms hydrotalcite at mgo surface.This slurry of 100mL is made an addition in the simulated wastewater of 2L that fluorine concentration is 20mg/L, stirred 30 minutes.Afterwards, carry out solid-liquid separation and measure fluorine concentration in the solution.It is the results are shown in table 2.As shown in table 2, the fluorine concentration in the processing water can be reduced to and be significantly less than environmental criteria (0.8mg/L is following).
[table 2]
? Former water Handle water
Fluorine concentration (mg/L) 20 0.3
[embodiment 3]
According to the following cleaning material that produces of manufacturing system shown in Figure 3.At first, water is directed in the interpolation groove 10, adds poly aluminium chloride so that the aluminum concentration in the water becomes 240mg/L.It is directed in the reactive tank 30.Afterwards, in reactive tank 30, mix the magnesium oxide and the water that has added poly aluminium chloride of 1g/L, adjust agent as pH and add sodium hydroxide and be adjusted into after pH8.5～9.5, stirred 20 hours, and it was reacted 20 hours under 20 ℃ of temperature.After the reaction, the cleaning material that generates is directed in solid-liquid separation tank 40(thickner) in carry out solid-liquid separation.Afterwards, dehydrate to obtain cleaning material.
Be to add this cleaning material of 0.5% in the simulated wastewater of 20mg/L in fluorine concentration, stirred 30 minutes.Afterwards, leave standstill and made the cleaning material sedimentation in 30 minutes.Result is shown in table 3.
[comparative example 1]
According to the following cleaning material that produces of manufacturing system shown in Figure 3.At first, water is directed in the interpolation groove 10, adds poly aluminium chloride so that the aluminum concentration in the water becomes 240mg/L.It is directed in the reactive tank 30.Afterwards, in reactive tank 30, mix the magnesium oxide and the water that has added poly aluminium chloride of 2.4g/L, adjust agent as pH and add sodium hydroxide and be adjusted into after pH8.5～9.5, stirred 20 hours, and it was reacted 20 hours under 20 ℃ of temperature.After the reaction, the cleaning material that generates is directed in solid-liquid separation tank 40(thickner) in carry out solid-liquid separation.Afterwards, dehydrate to obtain cleaning material.Be to add this cleaning material of 0.5% in the simulated wastewater of 20mg/L in fluorine concentration, stirred 30 minutes.Afterwards, leave standstill and made the cleaning material sedimentation in 30 minutes.Result is shown in table 3.
Shown in result, embodiment 3 and comparative example 1 all can be reduced to the fluorine concentration of handling water below the draining benchmark (8mg/L) of the commons aqua region beyond the marine site, but the stable volume of comparative example 1 is very big, and separation property is poor.On the other hand, the stable volume of embodiment 3 is less, and separation property is good, therefore can carry out solid-liquid separation at short notice.
[table 3]
? Embodiment 3 Comparative example 1
Handle the fluorine concentration in the water 5.0mg/L 7.0mg/L
Stablize volume 24% 96%
Utilizability on the industry
The settleability excellence of material in slurry handled in the water purification that contains hazardous substance of the present invention, and can capture the objectionable impurities of fluorine in the water, boron, nitrogen compound, phosphorus, heavy metal class and promptly remove.

Claims (4)

1. material is handled in a water purification that contains hazardous substance, and it forms hydrotalcite at mgo surface and forms,
The water purification processing material that this contains hazardous substance makes an addition in the water that contains hazardous substance objectionable impurities is captured in this hydrotalcite, and carries out solid-liquid separation with the state that has captured objectionable impurities, thereby objectionable impurities is removed outside system.
2. material is handled in the water purification that contains hazardous substance according to claim 1, wherein,
The water purification processing material that this contains hazardous substance makes magnesium oxide and aluminum soluble salt react under aqueous solution neutral and alkali condition at mgo surface formation hydrotalcite and forms.
3. the manufacture method of material is handled in the water purification that contains hazardous substance, and it has:
The composition that adds hydrotalcite in water is the operation of magnesium oxide and aluminum soluble salt;
Reaction process makes described magnesium oxide, aluminum soluble salt and water react the form slurry in next life under alkaline condition, and described slurry contains the water purification that contains hazardous substance that forms hydrotalcite on above-mentioned magnesian surface handles material; And
Solid-liquid separation process carries out solid-liquid separation by the cleaning material sedimentation in the described slurry that makes generation, thereby reclaims this processing material.
4. the manufacture method of material is handled in the water purification that contains hazardous substance, wherein,
In the described manufacture method of claim 3, part or all of the processing material of solid-liquid separation is returned to reaction process, and in the formation of hydrotalcite, utilizes the processing material of foldback.
CN2011800513007A 2010-10-29 2011-09-15 Purification material for toxic matter-containing water and production method for same Pending CN103189318A (en)

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Application publication date: 20130703