CN102949979A - Process for modifying diatomite - Google Patents
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- CN102949979A CN102949979A CN2012104571351A CN201210457135A CN102949979A CN 102949979 A CN102949979 A CN 102949979A CN 2012104571351 A CN2012104571351 A CN 2012104571351A CN 201210457135 A CN201210457135 A CN 201210457135A CN 102949979 A CN102949979 A CN 102949979A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012986 modification Methods 0.000 claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 23
- 230000004048 modification Effects 0.000 claims abstract description 19
- 238000007598 dipping method Methods 0.000 claims abstract description 14
- 238000000227 grinding Methods 0.000 claims abstract description 14
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 78
- 239000000243 solution Substances 0.000 claims description 69
- 239000007788 liquid Substances 0.000 claims description 34
- 239000002245 particle Substances 0.000 claims description 12
- 238000005245 sintering Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 239000007791 liquid phase Substances 0.000 claims description 2
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- 239000002574 poison Substances 0.000 abstract description 2
- 231100000614 poison Toxicity 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 238000002715 modification method Methods 0.000 abstract 1
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 20
- 238000010521 absorption reaction Methods 0.000 description 19
- 239000002689 soil Substances 0.000 description 11
- 238000001914 filtration Methods 0.000 description 10
- 230000010355 oscillation Effects 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 231100000086 high toxicity Toxicity 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- ISPYQTSUDJAMAB-UHFFFAOYSA-N 2-chlorophenol Chemical compound OC1=CC=CC=C1Cl ISPYQTSUDJAMAB-UHFFFAOYSA-N 0.000 description 1
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 150000004996 alkyl benzenes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229960003711 glyceryl trinitrate Drugs 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002703 mutagenesis Methods 0.000 description 1
- 231100000350 mutagenesis Toxicity 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention relates to a process for modifying diatomite. The process specifically comprises the following steps of: pretreating the diatomite, performing dipping modification, drying, high-temperature roasting and grinding to obtain the modified diatomite. The adsorbability of the modified diatomite is obviously improved. According to the modification method, the roasting treatment is carried out after dipping to form metal oxide which is difficult to dissolve out; the adsorption performance and hydrophobicity performance of the diatomite are increased; and the diatomite has excellent adsorption performance on organic poison with little less polarity, and has excellent promotion and application prospect.
Description
Technical field
The present invention relates to a kind of technique of diatomite modified.
Background technology
In China, along with the discharge capacity of sanitary sewage and industrial wastewater is increasing, composition also becomes increasingly complex, although soil and waters etc. all have certain " self-cleaning " effect to various pollutants, can digest degraded part toxic organic compound, but the speed that many toxic organic compounds are degraded by microorganisms is very slow, and thorough not, their residence times in environment are longer, these high toxicities, the organic matter of difficult degradation mainly contains nitrobenzene, phenols, alkyl benzene sulphonate, chlorophenol, agricultural chemicals, Polychlorinated biphenyls etc., wherein some organic matter has teratogenesis, carcinogenic, there is huge harm in the effects such as mutagenesis to human and environment.
At present, the main method of processing high toxicity, hardly degraded organic substance waste water both at home and abroad has bioanalysis, physico-chemical process and oxidizing process etc.Wherein, the main absorption method that adopts is processed high toxicity, organic wastewater with difficult degradation thereby, the advantages such as that the method has is simple to operate, take up an area less, effective, adsorbent commonly used mainly contains active carbon, clay mineral and resin etc., wherein take active carbon as example, its adsorption effect is better, and absorption stability is good, but have the problems such as processing cost is high, recyclability is poor, carbon loss is more serious, this is so that the corresponding financial burden that brings of the processing of waste water is heavier.Therefore, cheap in some waste water adsorption treatment processes of needs exploration, high performance new adsorbent replaces traditional adsorbent.Because the microcellular structure of diatomite uniqueness utilizes its absorption property to process waste water and not only can ensure preferably treatment effect, but also can more effectively utilize mineral resources, reduce processing cost.
Human is that Hanover by Germany was used for absorbing nitroglycerine in 1863 for diatomaceous understanding at first, explores through industrial continuation afterwards, and it is day by day ripe that diatomite is used for the technology of filtering.At present, along with further development of diatomite industry, its product variety is quite abundant, is applied to gradually the fields such as filtration, insulation material, filler and catalyst carrier.At present, diatomaceous application is mainly filter aid both at home and abroad, its kind is maximum, and purposes is the widest, and consumption is also maximum.China starts from the sixties in last century to diatomaceous development and use, and according to statistics in 1997, China's diatomite product output was 250,000 tons, is only second to U.S.'s (70.5 ten thousand tons), occupies the second in the world.
Diatomite possesses many good performances, and such as light weight, pore volume is large, and particle diameter is little, larger surface area, acidproof, and possess certain absorption property, utilize its absorption property to process waste water and not only can reduce cost, and can more effectively utilize mineral resources, application prospect is extensive.Yet the diatomite material absorption property of non-modified is relatively poor, and may contain accompanying impurities, affects its application in wastewater treatment, therefore must carry out modification to it.The modification that being intended to of at present both at home and abroad research improves diatomite Dye Adsorption performance mainly contains the method for modifying such as inorganic, organic and hot, but the diatomite regenerability of organically-modified method is poor, can not reuse, the easy stripping of metallic compound that inorganic modified method is used, cause secondary pollution, simple heat modification can only change diatomite surface topography and pore volume, and adsorption effect is not very desirable, and the Separation of Solid and Liquid difficulty.
Summary of the invention
The objective of the invention is for this advance the deficiencies in the prior art and the technique of the diatomite modified that a kind of efficient is high, technique is simple, modified effect is good is provided.The calcination process that this method of modifying carries out behind dipping, the oxide of formation metal is difficult for stripping, also increases diatomaceous absorption property and hydrophobic performance, and the less organic poison of polarity is had good absorption property.
Technical scheme of the present invention is: a kind of technique of diatomite modified, and its concrete steps are as follows: (a) with the diatomite preliminary treatment, remove most of impurity on diatomite original soil surface; Preliminary its absorption property that improves; (b) with modification liquid pretreated diatomite is flooded modification, wherein modification liquid is Al
2(SO
4)
3Solution or FeCl
3Mixed solution with NaOH; (c) drying, roasting, grinding namely obtain modification infusorial earth again.
Preferred described preliminary treatment is to process with acid solution, aqueous slkali or ultrasonic wave; Wherein used acid solution is HCl solution, H
2SO
4Solution or HNO
3A kind of in the solution, the mass concentration of acid solution is 1～10%; Used aqueous slkali is a kind of in NaOH solution or the KOH solution, and the mass concentration of aqueous slkali is 1～15%; Acid solution and aqueous slkali pretreatment temperature are 80～100 ℃, and pretreatment time is 1～2h; During ultrasonic preliminary treatment, adopt water as liquid phase, supersonic frequency is 10～50KHz, and power is 15～150W, and ultrasonic time is 1～10min; When carrying out preliminary treatment with acid or aqueous slkali, the solid-to-liquid ratio of control diatomite quality and liquor capacity is 1:(10 ~ 20) (g/ml); When carrying out preliminary treatment, the solid-to-liquid ratio of the volume of control diatomite quality and water is 1:(10 ~ 20 with ultrasonic) (g/ml).
The mass concentration of preferred described modification liquid is 0.5～7%; FeCl wherein
3With FeCl in the mixed solution of NaOH
3Quality and the volume ratio of NaOH solution be 1:(3 ~ 5) (g/ml), the mass concentration of NaOH solution is 3%～7%; The solid-to-liquid ratio of diatomite quality and modification liquid volume is 1:(5 ~ 25) (g/ml); The dipping modification time is 24h～48h.
Preferred described baking temperature is 100～110 ℃, drying time 3～5h; Described sintering temperature is 600～1000 ℃, roasting time 2～4h; Grinding the diatomaceous particle mean size of post-modification is 100～200 orders.
Beneficial effect:
(1) diatomite modified method of the present invention is convenient to Separation of Solid and Liquid, is easy to diatomaceous recycling;
(2) diatomite modified method of the present invention can not produce diatomaceous mass loss, has guaranteed to a certain extent its absorption property;
(3) adsorption capacity of diatomite of the present invention after modification improves greatly;
The specific embodiment
Embodiment 1:
Preparation: (1) is got the 40g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and HCl liquor capacity is 1:10(g/ml) with 5% the HCl solution of 400ml respectively), after heating 1h 100 ℃ times, temperature filters, place the baking oven dry for standby; (2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 3% Al
2(SO
4)
3Solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:20(g/ml)) dipping 24h, the filtration post-drying is for subsequent use; (3) baking temperature is 100 ℃, drying time 3h, 800 ℃ of sintering temperatures, roasting time 2h is 100 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 85.1%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 2:
Preparation: (1) get the 20g diatomite original soil respectively with 1% the HNO of 400ml
3Solution mixes (solid-to-liquid ratio of diatomite quality and liquor capacity is 1:20(g/ml)), behind 80 ℃ of lower heating 2h of temperature, filter, place the baking oven dry for standby; (2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 0.5% FeCl
3With NaOH solution (FeCl
3Quality and the volume ratio of NaOH solution be 1:3 (g/ml)), the mass fraction of NaOH is 3%) solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:25) dipping 24h, the filtration post-drying is for subsequent use; (3) baking temperature is 100 ℃, drying time 3h, 800 ℃ of sintering temperatures, roasting time 2h is 200 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 73.4%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 3:
Preparation: (1) get the 20g diatomite original soil respectively with 10% the H of 300ml
2SO
4Solution mixes (solid-to-liquid ratio of diatomite quality and liquor capacity is 1:15(g/ml)), behind 90 ℃ of lower heating 1.5h of temperature, filter, place the baking oven dry for standby; (2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 7% Al
2(SO
4)
3Solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:15(g/ml)) dipping 36h, the filtration post-drying is for subsequent use; (3) baking temperature is 110 ℃, drying time 5h, 1000 ℃ of sintering temperatures, roasting time 4h is 150 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 64.3%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 4:
Preparation: (1) is got the 40g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and deionized water volume is 1:10(g/ml) with the 400ml deionized water solution), ultrasonic 44KHz in Ultrasound Instrument, power 100W, time 6min, filter, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 0.5% Al
2(SO
4)
3Solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:5(g/ml)) dipping 48h, the filtration post-drying is for subsequent use; (3) baking temperature is 105 ℃, drying time 4h, 1000 ℃ of sintering temperatures, roasting time 4h is 200 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 53.5%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 5:
Preparation: (1) is got the 20g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and liquor capacity is 1:15(g/ml) with 7% the NaOH solution of 300ml respectively), after heating 1h 80 ℃ times, temperature filters, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker,, with 5% FeCl
3With NaOH solution (FeCl
3Quality and the volume ratio of NaOH solution be 1:5 (g/ml)), the mass fraction of NaOH is 7%) solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:20) dipping 36h, the filtration post-drying is for subsequent use; (3) baking temperature is 100 ℃, drying time 4h, 600 ℃ of sintering temperatures, roasting time 3h is 150 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 60.7%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 6:
Preparation: (1) is got the 20g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and liquor capacity is 1:20(g/ml) with 1% the NaOH solution of 400ml respectively), after heating 2h 90 ℃ times, temperature filters, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker,, with 5% FeCl
3With NaOH solution (FeCl
3Quality and the volume ratio of NaOH solution be 1:5 (g/ml)), the mass fraction of NaOH is 7%) solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:20) dipping 24h, the filtration post-drying is for subsequent use; (3) baking temperature is 100 ℃, drying time 4h, 600 ℃ of sintering temperatures, roasting time 3h is 120 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 66.9%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 7:
Preparation: (1) is got the 40g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and liquor capacity is 1:10(g/ml) with 15% the KOH solution of 400ml respectively), after heating 1.5h 100 ℃ times, temperature filters, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 7% FeCl
3With NaOH solution (FeCl
3Quality and the volume ratio of NaOH solution be 1:4 (g/ml)), the mass fraction of NaOH is 5%) solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:10) dipping 48h, the filtration post-drying is for subsequent use; (3) baking temperature is 110 ℃, drying time 3h, 1000 ℃ of sintering temperatures, roasting time 3h is 100 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 48.2%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 8:
Preparation: (1) is got the 20g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and deionized water volume is 1:15(g/ml) with the 300ml deionized water solution), ultrasonic 50KHz in Ultrasound Instrument, power 150W, time 1min, filter, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 3% Al
2(SO
4)
3Solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:10(g/ml)) dipping 24h, the filtration post-drying is for subsequent use; (3) baking temperature is 100 ℃, drying time 4h, 600 ℃ of sintering temperatures, roasting time 4h is 150 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 51.5%.The same terms, the diatomite clearance of non-modified only 42.8%.
Embodiment 9:
Preparation: (1) is got the 20g diatomite original soil and is mixed (solid-to-liquid ratio of diatomite quality and deionized water volume is 1:20(g/ml) with the 400ml deionized water solution), ultrasonic 10KHz in Ultrasound Instrument, power 15W, time 10min, filter, place the baking oven dry for standby.(2) get respectively the above-mentioned pretreated diatomite of 10g and place beaker, with 7% FeCl
3With NaOH solution (FeCl
3Quality be 1:3(g/ml with the volume ratio of NaOH)) solution 200ml mixes (solid-to-liquid ratio of diatomite quality and modified solution volume is 1:5) dipping 48h, it is for subsequent use to filter post-drying; (3) baking temperature is 100 ℃, drying time 4h, 600 ℃ of sintering temperatures, roasting time 4h is 200 orders through grinding the diatomaceous particle mean size of post-modification.
Absorption property: experiment condition: at 25 ℃, pH=7, duration of oscillation 24h, diatomite consumption 1.5g/L, nitrobenzene solution concentration is 200mg/L.Clearance: 70.3%.The same terms, the diatomite clearance of non-modified only 42.8%.
Claims (4)
1. the technique of a diatomite modified, its concrete steps are as follows: (a) with the diatomite preliminary treatment, remove impurity; (b) with modification liquid pretreated diatomite is flooded modification, wherein modification liquid is Al
2(SO
4)
3Solution or FeCl
3Mixed solution with NaOH; (c) drying, roasting, grinding namely obtain modification infusorial earth again.
2. described technique according to claim 1 is characterized in that described preliminary treatment is to process with acid solution, aqueous slkali or ultrasonic wave; Wherein used acid solution is HCl solution, H
2SO
4Solution or HNO
3A kind of in the solution, the mass concentration of acid solution is 1～10%; Used aqueous slkali is a kind of in NaOH solution or the KOH solution, and the mass concentration of aqueous slkali is 1～15%; Acid solution and aqueous slkali pretreatment temperature are 80～100 ℃, and pretreatment time is 1～2h; During ultrasonic preliminary treatment, adopt water as liquid phase, supersonic frequency is 10～50KHz, and power is 15～150W, and ultrasonic time is 1～10min; When carrying out preliminary treatment with acid or aqueous slkali, the solid-to-liquid ratio of control diatomite quality and liquor capacity is 1:(10 ~ 20) (g/ml); When carrying out preliminary treatment, the solid-to-liquid ratio of the volume of control diatomite quality and water is 1:(10 ~ 20 with ultrasonic) (g/ml).
3. described technique according to claim 1, the mass concentration that it is characterized in that described modification liquid is 0.5～7%; FeCl wherein
3With FeCl in the mixed solution of NaOH
3Quality and the volume ratio of NaOH solution be 1:(3 ~ 5) (g/ml), the mass concentration of NaOH solution is 3%～7%; The solid-to-liquid ratio of diatomite quality and modification liquid volume is 1:(5 ~ 25) (g/ml); The dipping modification time is 24h～48h.
4. described technique according to claim 1 is characterized in that described baking temperature is 100～110 ℃, drying time 3～5h; Described sintering temperature is 600～1000 ℃, roasting time 2～4h; Grinding the diatomaceous particle mean size of post-modification is 100～200 orders.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103432986A (en) * | 2013-08-15 | 2013-12-11 | 南京工业大学 | Magnetic kieselgur based adsorbent, and preparation method and application thereof |
| CN103566913A (en) * | 2013-11-19 | 2014-02-12 | 马菊云 | Method for recycling seaweed gel production waste-waste diatomite filtering residues |
| CN105130011A (en) * | 2015-09-07 | 2015-12-09 | 深圳市德庆科技有限公司 | Diatomite sewage treating agent, preparation method and technology application thereof |
| CN107913712A (en) * | 2017-12-08 | 2018-04-17 | 中山大学 | A kind of titanium dioxide/modification infusorial earth composite material, film and its preparation method and application |
| CN111747421A (en) * | 2020-06-02 | 2020-10-09 | 武汉理工大学 | Method for improving activity of expanded perlite material |
| CN112516968A (en) * | 2020-12-16 | 2021-03-19 | 东北电力大学 | Preparation method of metal organic framework material loaded modified diatomite adsorbent |
| CN115155514A (en) * | 2022-06-13 | 2022-10-11 | 重庆交通大学 | Diatomite-based magnetic adsorption phosphorus removal agent and preparation method thereof |
| CN115368122A (en) * | 2022-09-16 | 2022-11-22 | 深圳市吉迩科技有限公司 | Modified diatomite porous ceramic slurry and ceramic powder |
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| US6200482B1 (en) * | 1997-08-12 | 2001-03-13 | Adi International Inc. | Arsenic filtering media |
| CN1864851A (en) * | 2006-04-13 | 2006-11-22 | 浙江三鼎科技有限公司 | Method for preparing modified composite absorption agent of diatomite |
| CN102765775A (en) * | 2012-06-19 | 2012-11-07 | 哈尔滨工程大学 | Sewage treatment method by ultrasonic wave enhanced diatomite |
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2012
- 2012-11-14 CN CN2012104571351A patent/CN102949979A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103566913A (en) * | 2013-11-19 | 2014-02-12 | 马菊云 | Method for recycling seaweed gel production waste-waste diatomite filtering residues |
| CN105130011A (en) * | 2015-09-07 | 2015-12-09 | 深圳市德庆科技有限公司 | Diatomite sewage treating agent, preparation method and technology application thereof |
| CN107913712A (en) * | 2017-12-08 | 2018-04-17 | 中山大学 | A kind of titanium dioxide/modification infusorial earth composite material, film and its preparation method and application |
| CN111747421A (en) * | 2020-06-02 | 2020-10-09 | 武汉理工大学 | Method for improving activity of expanded perlite material |
| CN112516968A (en) * | 2020-12-16 | 2021-03-19 | 东北电力大学 | Preparation method of metal organic framework material loaded modified diatomite adsorbent |
| CN115155514A (en) * | 2022-06-13 | 2022-10-11 | 重庆交通大学 | Diatomite-based magnetic adsorption phosphorus removal agent and preparation method thereof |
| CN115368122A (en) * | 2022-09-16 | 2022-11-22 | 深圳市吉迩科技有限公司 | Modified diatomite porous ceramic slurry and ceramic powder |
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