CN106000288A - Preparing method of rare-earth-carried modified fly ash - Google Patents
Preparing method of rare-earth-carried modified fly ash Download PDFInfo
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- 239000010881 fly ash Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 13
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims abstract description 10
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000005406 washing Methods 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000012153 distilled water Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000010883 coal ash Substances 0.000 claims description 23
- 239000000843 powder Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 239000001117 sulphuric acid Substances 0.000 claims description 9
- 235000011149 sulphuric acid Nutrition 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 7
- 230000033228 biological regulation Effects 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 19
- 239000002351 wastewater Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000009776 industrial production Methods 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000004615 ingredient Substances 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 230000008569 process Effects 0.000 description 8
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- WMOHXRDWCVHXGS-UHFFFAOYSA-N [La].[Ce] Chemical compound [La].[Ce] WMOHXRDWCVHXGS-UHFFFAOYSA-N 0.000 description 2
- 238000011953 bioanalysis Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005660 chlorination reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910002796 Si–Al Inorganic materials 0.000 description 1
- 208000036142 Viral infection Diseases 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 230000001684 chronic effect Effects 0.000 description 1
- 231100000762 chronic effect Toxicity 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Classifications
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- 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
-
- 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
-
- 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
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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)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Processing Of Solid Wastes (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a preparing method of rare-earth-carried modified fly ash. The preparing method includes the following specific steps that raw fly ash is subjected to ultrasonic washing with distilled water, dried and screened, and undersize fly ash is taken; the fly ash and sulfuric acid are evenly mixed in a solid-liquid ratio, and the mixture is stirred and soaked; then rinsing is carried out with deionized water, and filtering and drying are carried out; the fly ash pretreated with the sulfuric acid and a cerium-chloride and lanthanum-chloride aqueous solution are evenly mixed in a solid-liquid ratio, pH is adjusted, and the mixture is stirred and soaked; the mixture is filtered, dried and then subjected to microwave heating, and the rare-earth-carried modified fly ash is obtained after natural cooling. When ammonia-nitrogen-containing industrial production waste water is treated with the modified fly ash, the removing effect is obvious, the contents of ammonia and nitrogen in waste water can be effectively reduced, the modified fly ash has high adaptability to complex-ingredient ammonia-nitrogen-containing waste water, the advantages of rare earth resources are sufficiently used, cost is reduced, waste is treated through waste, and waste is recycled.
Description
Technical field
The present invention relates to water process and solid waste resource recovery utilizes field, particularly belong to the preparation method of a kind of rare earth loaded modified flyash processing industrial production wastewater, prepared modified coal ash is applied to industrial and mining establishment's waste discharge of the complicated component containing ammonia nitrogen.
Technical background
Society, the discharge capacity of industrial wastewater is huge, therein rich in ammonia nitrogen be widely present in commercial production even people's daily life, ecological environment and mankind itself's health are had greatly harm, the harm of nitrogen-containing wastewater is in particular in: (1) impact on water quality environment.The existence of ammonia nitrogen can make the ratio of water Middle nutrition material change, and the biology relying on these materials can increase sharply, and water body balances and then is broken so that crisis occurs in bio-diversity；(2) body eutrophication is made.Excess of ammonia nitrogen makes the biological breedings rapidly such as algae, and algae can secrete poisonous and harmful substance, destroys water quality, makes content of oxygen dissolved in water decline simultaneously, even results in the biological mortalities such as Fish；(3) domestic water cost is caused to increase.Water quality that ammonia nitrogen brings and the change of microbiologic population so that the cost for domestic water of sterilizing increases, and human body also can bring long-term Chronic Effect simultaneously；(4) production and living conditions of the mankind are affected.The ammonia nitrogen corrosion to pipeline, equipment etc., not only brings the problem that normal production run cannot be the most lasting, and unsafe factor can be made to increase, and is harm great to mankind itself.
At present, the processing method of ammonia nitrogen waste water mainly has absorption method, break point chlorination method and bioanalysis.The features such as absorption method efficiency is high, simple, the low cost of flow process so that the method is most widely used；Need during break point chlorination method to add virose chlorine, be the shortcoming that one is bigger；The application of bioanalysis requires higher, treatment effect also less stable simultaneously, so, it is considered to more efficient more cheap adsorption method is one of the most best direction.
Flyash is the solid waste that thermal power plant is got rid of, and it is mainly composed of Al2O3、SiO2、Fe2O3, CaO etc., profile is mainly glass spheres, and single powder coal ash particle diameter is about 25 ~ 30 μm, and specific surface area is very big, generally 1600 ~ 3500cm2/ g, mean specific gravity is 2114g/cm3, volume-weighted average is 783kg/m3.Exactly because the owned bigger specific surface area of flyash so that it has good absorption property.The harmful constituent process removed in industrial production wastewater with flyash is more complicated, and its main mechanism is adsorption, flocculation sediment and filtration.Modified flyash has bigger specific surface area, and absorption property ratio is more preferable.
At present, the modification to raw material powder coal ash mainly has acid modification, alkali modification, salt modified, mixed and modified and the method such as surfactant is modified.Modified flyash all shows the raising of the treatment effeciency to different quality waste water.Modified coal ash is used for the process of ammonia nitrogen waste water, not only realizes the treatment of wastes with processes of wastes against one another, economy and environmental benefit will be increased substantially simultaneously, alleviate the environmental protection pressure of society.
In recent years, rare earth research in the treatment of waste water becomes increasingly active, and traces it to its cause, and one is rare earth in terms of to some agent modifier, has really obtained more significantly effect, and substantial amounts of research work is also launched with regard to this；Two be China be rare earth big country, rare earth kind with utilize on have advantageous advantage.
CN102357355A discloses the preparation method of a kind of modified coal ash for processing ammonia nitrogen waste water, its by the sodium hydroxide solution of raw material powder coal ash and 0.5 ~ 8 mol/L 10 ~ 90 DEG C, after solid-to-liquid ratio is 1:2 ~ 10 time soak time 0.5 ~ 10 hour, clean with the soft water of removing calcium and magnesium, it is dried, it is thus achieved that modified coal ash.The method is the most conventional, but treatment effect is relatively general, and the nitrogen-containing wastewater being simultaneous for composition slightly complicated does not have obvious disposal ability.
CN102188953A discloses a kind of modified coal ash for processing ammonia nitrogen waste water, prepares by the following method: calcine at low temperatures after being mixed in proportion with flyash by NaOH, grinds after cooling and sieves, it is subsequently adding the water of 1 ~ 5 times of weight, mixes, stir, after being warming up to 70 DEG C, stop stirring, constant temperature gel 1.5 ~ 2h, it is warming up to 100 DEG C again, thermostatic crystallization 3 ~ 4h, sucking filtration, wash with water to neutrality, dry, grind after cooling and sieve, prepare.The method uses basic treatment, calcining modification, and there is intensification temperature-fall period period, makes temperature controlled processes complicated, typically can impact modification with common washing meanwhile.
Summary of the invention
It is an object of the invention to provide the preparation method of a kind of rare earth loaded modified flyash processing industrial production wastewater, the method has prepares easy, the treatment of wastes with processes of wastes against one another, simple to operate, low cost and other advantages, having given full play of the absorption property of flyash self, obvious improves the ability of ammonia nitrogen in Powder ash adsorption waste water.
The present invention specifically comprises the following steps that
1) raw material powder coal ash is added distilled water ultrasonic washing, dry, cross 0.074mm sieve, take minus sieve coal ash；
2) by solid-to-liquid ratio, it is that 5 ~ 15% sulphuric acid uniformly mix by flyash and mass fraction, and stirs 1 ~ 3 hour, soak 8 ~ 24 hours；Then with deionized water rinsing, filter and be dried；
3) will be 0.4 ~ 0.8% cerium chloride with the flyash of sulfur acid pretreatment and mass fraction and mass fraction is that 0.6 ~ 1.0% lanthanum chloride solution is uniformly mixed by solid-to-liquid ratio, and to instill NaOH aqueous solution regulation pH be 8 ~ 10, stir 1 ~ 3 hour, soak 8 ~ 24 hours；
4) filter, dried, 500 ~ 900W microwave heating 5 ~ 15 minutes, be rare earth modified flyash of the present invention after natural cooling.
The solid-to-liquid ratio of described flyash and 5 ~ 15% sulphuric acid is 1:3 ~ 4.
The flyash of described sulfur acid pretreatment and the solid-to-liquid ratio of 0.4 ~ 0.8% cerium chloride aqueous solution and 0.6 ~ 1.0% lanthanum chloride solution are 1:3 ~ 5:3 ~ 5.
Flyash is due to through high-temp combustion, some of which valence link and activity Al2O3And some loose structures, it is all to exist with stable form or closing form so that its natural activity is not the highest.Open Si-Al key, excite Al2O3 Etc. structure of matter activity, open blind bore road, increase the surface area exposed, be to flyash modified important mechanism foundation.
In the present invention, the washing of distilled water under ultrasound wave, it is possible to the effectively impurity of some remainings of the elimination covering to natural powder coal ash；Through screening, it is ensured that bigger surface area capacity；With the sulphuric acid of variable concentrations, pretreatment sample is carried out the acidleach of certain time, opens the valence link and loose structure wherein closed, provide good basis for next step modification.
Flyash after washing, screening, acidleach, is sufficiently mixed with cerium chloride and lanthanum chloride solution and soaks, its object is to enable cerium lanthanum element to be sufficient filling with in the surface of flyash with duct, to cover.The activity of cerium lanthanum element is mainly embodied in oxide, when the flyash soaked through RE-treated in microwave heating, reaction, in the modified coal ash of rare earth element, active surface is fully activated with structure, is greatly improved flyash to the absorbability of harmful substance in waste water.
Detailed description of the invention
Following example are intended only as illustrating the present invention, do not represent the restriction to present invention application.
Embodiment 1
Raw material powder coal ash distilled water is washed in ultrasonic washing unit, then dries, crosses 0.074mm bolting, take minus sieve coal ash；Uniformly it is mixed and stirred in container 1 hour by 1:3 solid-to-liquid ratio with the sulphuric acid that mass fraction is 5%, soaks 8 hours, then rinse with deionized water, filter and be dried；Uniformly will mix in container by 1:3:3 solid-to-liquid ratio with the cerium chloride that mass fraction is 0.4% and the lanthanum chloride solution that mass fraction is 0.6% with the flyash of low-kappa number, and instill NaOH aqueous solution regulation pH be 8, stir 1 hour, soak 8 hours；Filtration, dried 550W microwave heating 5 minutes, obtain described rare earth modified flyash after natural cooling.
It is 7 that the rare earth loaded modified flyash obtained by embodiment 1 processes pH, and ammonia-nitrogen content is the ammonia nitrogen waste water of 100mg/L, reacts 1h, compared with the clearance 13% of raw material powder coal ash ammonia nitrogen, bring up to 64% on 25 DEG C of water bath with thermostatic control agitators.
Embodiment 2
Raw material powder coal ash distilled water is washed in ultrasonic washing unit, then dries, crosses 0.074mm bolting, take minus sieve coal ash；Uniformly it is mixed and stirred in container 1 hour by 1:3 solid-to-liquid ratio with the sulphuric acid that mass fraction is 10%, soaks 16 hours, then rinse with deionized water, filter and be dried；Uniformly will mix in container by 1:3:3 solid-to-liquid ratio with the cerium chloride that mass fraction is 0.5% and the lanthanum chloride solution that mass fraction is 0.8% with the flyash of low-kappa number, and instill NaOH aqueous solution regulation pH be 9, stir 1 hour, soak 16 hours；Filtration, dried 650W microwave heating 10 minutes, obtain described rare earth modified flyash after natural cooling.
Processing method brings up to 72% with embodiment 1, the clearance of ammonia nitrogen.
Embodiment 3
Raw material powder coal ash distilled water is washed in ultrasonic washing unit, then dries, crosses 0.074mm bolting, take minus sieve coal ash；Uniformly it is mixed and stirred in container 2 hours by 1:4 solid-to-liquid ratio with the sulphuric acid that mass fraction is 15%, soaks 16 hours, then rinse with deionized water, filter and be dried；Uniformly will mix in container by 1:4:4 solid-to-liquid ratio with the cerium chloride that mass fraction is 0.7% and the lanthanum chloride solution that mass fraction is 0.9% with the flyash of low-kappa number, and instill NaOH aqueous solution regulation pH be 10, stir 2 hours, soak 16 hours；Filtration, dried 800W microwave heating 10 minutes, obtain described rare earth modified flyash after natural cooling.
Processing method brings up to 85% with embodiment 1, the clearance of ammonia nitrogen.
Embodiment 4
Raw material powder coal ash distilled water is washed in ultrasonic washing unit, then dries, crosses 0.074mm bolting, take minus sieve coal ash；Uniformly it is mixed and stirred in container 3 hours by 1:4 solid-to-liquid ratio with the sulphuric acid that mass fraction is 15%, soaks 24 hours, then rinse with deionized water, filter and be dried；Uniformly will mix in container by 1:5:5 solid-to-liquid ratio with the cerium chloride that mass fraction is 0.8% and the lanthanum chloride solution that mass fraction is 1.0% with the flyash of low-kappa number, and instill NaOH aqueous solution regulation pH be 10, stir 3 hours, soak 24 hours；Filtration, dried 850W microwave heating 15 minutes, obtain described rare earth modified flyash after natural cooling.
Processing method brings up to 89% with embodiment 1, the clearance of ammonia nitrogen.
Claims (3)
1. a preparation method for rare earth loaded modified flyash, is characterized in that step is as follows:
1) raw material powder coal ash is added distilled water ultrasonic washing, dry, cross 0.074mm sieve, take minus sieve coal ash；
2) by solid-to-liquid ratio, it is that 5 ~ 15% sulphuric acid uniformly mix by flyash and mass fraction, and stirs 1 ~ 3 hour, soak 8 ~ 24 hours；Then with deionized water rinsing, filter and be dried；
3) will be 0.4 ~ 0.8% cerium chloride with the flyash of sulfur acid pretreatment and mass fraction and mass fraction is that 0.6 ~ 1.0% lanthanum chloride solution is uniformly mixed by solid-to-liquid ratio, and to instill NaOH aqueous solution regulation pH be 8 ~ 10, stir 1 ~ 3 hour, soak 8 ~ 24 hours；
4) filter, dried, 500 ~ 900W microwave heating 5 ~ 15 minutes, be rare earth modified flyash of the present invention after natural cooling.
The preparation method of rare earth loaded modified flyash the most according to claim 1, is characterized in that the solid-to-liquid ratio of described flyash and 5 ~ 15% sulphuric acid is 1:3 ~ 4.
The preparation method of rare earth loaded modified flyash the most according to claim 1, is characterized in that the flyash of described sulfur acid pretreatment and the solid-to-liquid ratio of 0.4 ~ 0.8% cerium chloride aqueous solution and 0.6 ~ 1.0% lanthanum chloride solution are 1:3 ~ 5:3 ~ 5.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111264113A (en) * | 2020-03-09 | 2020-06-12 | 张晨 | Modified fly ash material for improving desertified land, composite material and improvement method |
| CN112592011A (en) * | 2020-11-20 | 2021-04-02 | 王立鹏 | Excess sludge cracking agent and preparation method and application thereof |
| CN113072122A (en) * | 2021-03-16 | 2021-07-06 | 南昌大学 | Treatment scheme and device for ammonia nitrogen adsorption of acid modified fly ash |
| CN116173891A (en) * | 2023-02-23 | 2023-05-30 | 武汉工程大学 | A kind of modified sepiolite composite material and its preparation method and application |
| CN116764610A (en) * | 2023-07-24 | 2023-09-19 | 中节能(山东)循环经济有限公司 | Water body defluorinating agent and preparation method thereof |
| CN118043135A (en) * | 2023-12-27 | 2024-05-14 | 宜昌邦普循环科技有限公司 | A self-assembled modified composite material and its preparation method and application |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607192A (en) * | 2009-07-14 | 2009-12-23 | 昆明理工大学 | A method for molding rare earth adsorbent |
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| CN113072122A (en) * | 2021-03-16 | 2021-07-06 | 南昌大学 | Treatment scheme and device for ammonia nitrogen adsorption of acid modified fly ash |
| CN116173891A (en) * | 2023-02-23 | 2023-05-30 | 武汉工程大学 | A kind of modified sepiolite composite material and its preparation method and application |
| CN116764610A (en) * | 2023-07-24 | 2023-09-19 | 中节能(山东)循环经济有限公司 | Water body defluorinating agent and preparation method thereof |
| CN116764610B (en) * | 2023-07-24 | 2024-03-08 | 中节能(山东)循环经济有限公司 | Water body defluorinating agent and preparation method thereof |
| CN118043135A (en) * | 2023-12-27 | 2024-05-14 | 宜昌邦普循环科技有限公司 | A self-assembled modified composite material and its preparation method and application |
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