CN103721715A - Activated charcoal loaded nano zero-valent iron material - Google Patents
Activated charcoal loaded nano zero-valent iron material Download PDFInfo
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- CN103721715A CN103721715A CN201310615041.7A CN201310615041A CN103721715A CN 103721715 A CN103721715 A CN 103721715A CN 201310615041 A CN201310615041 A CN 201310615041A CN 103721715 A CN103721715 A CN 103721715A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 134
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000000463 material Substances 0.000 title claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 claims abstract description 57
- 239000002245 particle Substances 0.000 claims abstract description 17
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- 229910010272 inorganic material Inorganic materials 0.000 claims abstract description 4
- 239000011147 inorganic material Substances 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
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- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000008367 deionised water Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 239000003610 charcoal Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- 238000005119 centrifugation Methods 0.000 claims description 5
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 5
- 230000002101 lytic effect Effects 0.000 claims description 5
- 239000000047 product Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000007791 liquid phase Substances 0.000 claims description 4
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 claims description 4
- 229940012189 methyl orange Drugs 0.000 claims description 4
- 230000000593 degrading effect Effects 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 claims description 3
- 239000006228 supernatant Substances 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 abstract description 9
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000356 contaminant Substances 0.000 abstract 2
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 229920002521 macromolecule Polymers 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 230000001603 reducing effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 22
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 18
- 238000000034 method Methods 0.000 description 12
- 239000000203 mixture Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 239000012153 distilled water Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000002351 wastewater Substances 0.000 description 6
- -1 Fe (OH)+2 Chemical class 0.000 description 5
- 239000007853 buffer solution Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 239000002156 adsorbate Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
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- 238000000926 separation method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 238000005273 aeration Methods 0.000 description 1
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- 239000003513 alkali Substances 0.000 description 1
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- HAYXDMNJJFVXCI-UHFFFAOYSA-N arsenic(5+) Chemical compound [As+5] HAYXDMNJJFVXCI-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052603 melanterite Inorganic materials 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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- 235000009566 rice Nutrition 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
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- Water Treatment By Sorption (AREA)
Abstract
The invention relates to an activated charcoal loaded nano zero-valent iron material which is characterized in that the granulated activated charcoal is used as a carrier and has a particle diameter of 0.2-0.45 mm and specific surface area above 1,500 m<2>; a solid loaded inorganic material is nano zero-valent iron particles, the loaded iron is zero-valent Fe; the loaded nano zero-valent iron particle has the size of 1-100 nm, and the content of the Fe is 200-2000 mg/g. The zero-valent iron material provided by the invention not only has the superior adsorption effect of the activated charcoal, strong reducing action of the nano iron, but also can accelerate the reduction reaction as the loading type nano iron takes iron as an anode and C as a cathode to form a primary battery, has a great impact on the catalysis degradation of the contaminant and can provide better technical support for safe control and deep purification of environmental micro contaminant (such as heavy metal ions, macromolecule dye and halogenated organic matters).
Description
Technical field
The present invention relates to a kind of nano composite active charcoal for catalytic degradation environment micropollutants, say more specifically the preparation method and application of load type active carbon nano zero-valence iron material.
Background technology
In modern society, major pollutants in drinking water have heavy metal ion, arsenic ion, micro-content organism pollutant, DBPs, nitrate, nitrite and pathogen, virus and the pathogenic microorganism etc. of solubility, and the water-purifying material being widely adopted at present mainly contains active carbon, molecular sieve, KDF and nanofiltration membrane etc.
Absorption method is one of effective ways of removing pollutant in polluted-water.Absorption is by effects such as intermolecular Van der Waals force, electrostatic force, hydrogen bond and the chemical bonds of adsorbate and adsorbent, and adsorbate is adsorbed onto to the physical chemical phenomenon on adsorbent.At field of Environment Protection, absorption method is mainly used in pretreatment and (reduces water body agent set load, reclaim utility) and advanced treating (raising water quality treatment amount, meet quality of reused water requirement), adopt additive method to be difficult to the severe toxicity of effectively processing and the pollutant of difficult degradation, the effect of processing is especially remarkable.
At present, increasing researcher transfers to sight on nano zero valence iron.Nano zero valence iron (nano zero-valent iron is called for short NZVI) is comprised of the nulvalent iron particle of nanoscale (1 ~ 100nm).The preparation method of nano zero valence iron is a lot, has physical method and chemical method.Physical method has physical vaporous deposition (using vaporization condensation process), metal vapors synthetic method, sputtering method, vacuum vapor deposition method, physical crushing method and machine-alloying etc.Chemical method has solid phase reduction method and liquid phase reduction, pyrolysis carbonyl iron processes, coprecipitation, electrodeposition process, sol-gel process and hydrothermal synthesis method etc.The purposes of Nanoscale Iron is very extensive, it not only can be used as absorbing material, high performance magnetic recording material, magnetic conduction pulp material and nanometer directed agents etc., can also in the thermal decomposition of C6 H6 gas phase, play nucleation as catalyst and prepare carbon fiber, can be used for preparing magnetic liquid etc.In the last few years, during application study about Nanoscale Iron aspect environmental improvement, there is report, as soil, deposit and underground water improvement aspect, and much research shows, nano zero valence iron can be removed the pollutant of the many chemical conventional method that exists in environment or the degraded of microorganism difficulty or ease very effectively, comprises the Identification of Soluble Organic chloro material, organic agricultural chemicals, organic dyestuff, various inorganic compound, heavy metal of difficult degradation in waste water etc.
Nanoscale Iron can be amino by nitroreduction, nitrate nitrogen is reduced to ammonia nitrogen, and then raising oxidability and biodegradable, but pulverous nano iron particles is extremely trickle, easily inactivation and reunion in water, is difficult to recycling and reclaims, and may also will carry out Separation of Solid and Liquid and carry out next step processing, strengthen further processing cost, limited its application in environment remediation.If Nanoscale Iron is loaded on carrier, form the particle of definite shape, not only can keep the intrinsic characteristic of Nanoscale Iron, more can simplify widely the operations such as subsequent recovery processing, improve the rate of recovery, this is the generation basis of load type active carbon nano zero valence iron.
Summary of the invention
The invention provides load type active carbon nano zero-valence iron material and its preparation method and application, nano level particle is due to extremely trickle, easily inactivation and reunion in water, be difficult to recycling and reclaim, may also to carry out Separation of Solid and Liquid and carry out next step processing, strengthen further processing cost, limited its application in environment remediation; Particle is extremely trickle, only than atom, molecule more greatly, therefore can penetrate blood vessel, enters the organs such as animal cardiopulmonary, because its surface area is relatively large, easily causes the various symptoms such as cardiopulmonary inflammation, damage, angiemphraxis again.
The invention provides a kind of active carbon nano zero-valence iron material, not only there is the good suction-operated of active carbon and the strong reduction of Nanoscale Iron simultaneously, and Supported Nano Zero-valent Iron is take iron as anode, C is negative electrode composition galvanic cell, reduction reaction is had to facilitation, the catalytic degradation of pollutant is had to very big effect, for deep purifying and the security control of environment micropollutants (as heavy metal ion, large molecular dye and halogenated organic matters etc.) provide better technical support.
For solving above technical problem, technical scheme of the present invention is: a kind of load type active carbon is received
Rice Zero-valent Iron material, it is characterized in that carrier is granular active carbon, the particle diameter of active carbon is between 0.2 ~ 0.45mm, more than the specific area 1500m2/g of active carbon, immobilized inorganic material is nano zero valence iron particle, the iron of load is the Fe of zero-valent state, and the nano zero valence iron particle of load is of a size of 1 ~ 100nm, and the content of Fe is at 200-2000mg/g.
Corresponding, the preparation method of described load type active carbon nano zero-valence iron material, comprises the following steps:
(A) pretreatment:
Particle diameter is limpid to supernatant by washed with de-ionized water at the active carbon of 0.2 ~ 0.45mm, then be placed in baking oven, at 105 ~ 110 ℃, dry to constant weight and (can first dry 2h, take out and weigh, be placed in again oven for drying 2h, repeat such operation, until front and back weigh difference, be not more than 0.02g), be stored in airtight vial.
(B) preparation of loaded with nano Zero-valent Iron:
Adopt liquid phase reduction: the active carbon that takes respectively 0.5g adds in the 0.05mol/L FeSO47H2O solution of 50mL, under room temperature (25 ℃) condition, be placed in constant temperature oscillator, the time that Fe2+ fully adsorbs in active carbon is at 30 ~ 120min, it is fully adsorbed, then, slowly add the solution with copperas solution isopyknic 0.2 ~ 2 mol/L NaBH4, be placed in constant temperature oscillator 30min, it is fully reacted, until no longer include bubble in solution, emerge, reaction finish after under 2500rpm centrifugal 10min, reaction equation is: 2Fe2++ BH4-+2H2O → 2Fe+BO2-+2H2+4H+.
(C) centrifugation its lytic activity charcoal loaded with nano-iron, in temperature, be 60 ℃, the deionized water washed product of the ultrasonic degas of 7 minutes rotating speed 3000rpm used times 3 times, use again absolute ethanol washing 3 times, proceed to vacuum desiccator dry, after being dried, obtain load type active carbon nano zero valence iron.
Corresponding, the application of described load type active carbon nano zero-valence iron material, is the application in catalyzing and degrading pollutant.
The invention provides load type active carbon nano zero-valence iron material and its preparation method and application.Activated carbon supported Nanoscale Iron (NZVI/AC), not only there is the good suction-operated of active carbon and the strong reduction of Nanoscale Iron simultaneously, and Supported Nano Zero-valent Iron is take iron as anode, C is negative electrode composition galvanic cell, and reduction reaction is had to facilitation.In addition, the Fe2 of anode production+under aerobic and alkali condition, can generate Fe (H2O) 3+6 and Fe (OH) 3, and hydrolysis generate Fe (OH) 2+, the complex ion such as Fe (OH)+2, further absorption and coagulation precipitates various hard-degraded substances.Current activated carbon supported Nanoscale Iron has been used to administer multiple polluted-water.For deep purifying and the security control of environment micropollutants (as heavy metal ion, large molecular dye and halogenated organic matters etc.) provide better technical support.
The specific embodiment
By example, further illustrate the present invention below:
example one:
The active carbon of 0.5g is added in the 0.05mol/L FeSO47H2O solution of 50mL, under room temperature (25 ℃) condition, be placed in constant temperature oscillator 30min, it is fully adsorbed.Then, slowly add the solution with copperas solution isopyknic 0.05 mol/L NaBH4, be placed in constant temperature oscillator 30min, it is fully reacted, reaction finish after under 2500rpm centrifugal 10min.Centrifugation its lytic activity charcoal loaded with nano-iron, the deionized water washed product of use ultrasonic degas (7min, 60 ℃, 3000rpm) 3 times, then use absolute ethanol washing 3 times, proceed to vacuum desiccator dry.The content of this load type active carbon nano zero-valence iron material Fe is at 200-2000mg/g.
Activated carbon supported Nanoscale Iron Pyrogentisinic Acid has extremely strong catalytic degradation ability, illustrates, and when phenol concentration in water body is 40mg/l, above-mentioned material can drop to the concentration of phenol below 2mg/l in 2.5h.
example two:
The active carbon of 0.5g is added in the 0.05mol/L FeSO47H2O solution of 50mL, under room temperature (25 ℃) condition, be placed in constant temperature oscillator 30min, it is fully adsorbed.Then, slowly add the solution with copperas solution isopyknic 0.05 mol/L NaBH4, be placed in constant temperature oscillator 30min, it is fully reacted, reaction finish after under 2500rpm centrifugal 10min.Centrifugation its lytic activity charcoal loaded with nano-iron, the deionized water washed product of use ultrasonic degas (7min, 60 ℃, 3000rpm) 3 times, then use absolute ethanol washing 3 times, proceed to vacuum desiccator dry.The content of this load type active carbon nano zero-valence iron material Fe is at 200-2000mg/g.
Activated carbon supported Nanoscale Iron has extremely strong catalytic degradation ability to methyl orange, illustrates, and when the concentration of methyl orange in water body is 20mg/l, above-mentioned material can drop to the concentration of methyl orange below 0.5mg/l in 4h.
Following part is load type active carbon nano zero valence iron adsorbing phenol experimental program
One, laboratory apparatus and reagent
1. instrument: insulating box, ultraviolet specrophotometer, ultrasonic cleaning machine, shaking table, tool plug triangular flask
2. reagent: active carbon
Deionized water
Buffer solution: PH=10.7, takes 20g ammonium chloride and is dissolved in 100mL ammoniacal liquor;
4-AA solution: 2%;
Potassium ferricyanide solution: 8%
10mg/l phenol
40mg/L wastewater containing phenol
0.05mol/L?FeSO4·7H2O
0.05mol/L?NaBH4
Absolute ethyl alcohol: analyze pure
Two, experiment content
1. pretreatment:
Particle diameter is limpid to supernatant by washed with de-ionized water at the active carbon of 0.2 ~ 0.45mm, then be placed in baking oven, at 105 ~ 110 ℃, dry to constant weight and (can first dry 2h, take out and weigh, be placed in again oven for drying 2h, repeat such operation, until front and back weigh difference, be not more than 0.02g), be stored in airtight vial.
2. the drafting of the calibration curve of phenol:
In 10 50mL colorimetric cylinders, add respectively 0,0.10,0.20,0.60,1.00,1.40,2.00,2.50,3.00, the mass concentration of 3.50ml is the phenol Standard liquid of 10mg/l, with after distilled water diluting, adds the buffer solution of 0.5mL, mix, the 4-AA solution that adds 1.00mL, mixes, then adds 1.0mL potassium ferricyanide solution, be diluted to assigned scale, fully mix, close plug, places 10 minutes, immediately at wavelength 510nm place, take distilled water as reference, survey absorbance, record data, draw the calibration curve of absorbance-phenol concentration.
3. Phenol Value of Activated Carbon:
3.1 survey before Phenol Value of Activated Carbon
Get the water sample containing phenol of 2.5mL in 50ml colorimetric cylinder, with after distilled water diluting, add the buffer solution of 0.5mL, mix, add the 4-AA solution of 1.00mL, mix, add again 1.0mL potassium ferricyanide solution, be diluted to assigned scale, fully mix, close plug, place 10 minutes, at wavelength 510nm place, take distilled water as reference, survey absorbance, record data immediately.
3.2 survey after Phenol Value of Activated Carbon
Accurately take the active carbon of 0.5g, put into 200mL tool plug triangular flask, add 40mg/L wastewater containing phenol 100mL, tool plug triangular flask is placed in to shaking table, at 200 r/min, under room temperature (25 ℃) condition, react 2.5 h, make absorption reach balance.Filter to isolate active carbon, filtrate (wastewater containing phenol) is done to the step with 3.1.
Active carbon Pyrogentisinic Acid's equilibrium adsorption capacity is calculated as follows:
Qe=(ρ0-ρ1)V/m
Qe---during adsorption equilibrium, active carbon Pyrogentisinic Acid's adsorbance, mg/g;
The initial concentration of ρ 0---phenol, mg/L;
ρ 1---the phenol concentration after absorption, mg/L;
The quality of m---active carbon, g;
The volume of V---phenol solution, mL.
4. activated carbon supported Nanoscale Iron adsorbing phenol:
The preparation of 4.1 loaded with nano Zero-valent Iron:
Adopt liquid phase reduction: the active carbon that takes respectively 0.5g adds in the 0.05mol/L FeSO47H2O solution of 50mL, under room temperature (25 ℃) condition, is placed in constant temperature oscillator 30min, and it is fully adsorbed.Then, slowly add the solution with copperas solution isopyknic 0.05 mol/L NaBH4, be placed in constant temperature oscillator 30min, it is fully reacted, reaction finish after under 2500rpm centrifugal 10min.Reaction equation is: 2Fe2++ BH4-+2H2O → 2Fe+BO2-+2H2+4H+.
Centrifugation its lytic activity charcoal loaded with nano-iron, the deionized water washed product of use ultrasonic degas (7min, 60 ℃, 3000rpm) 3 times, then use absolute ethanol washing 3 times, proceed to vacuum desiccator dry.
4.2 phenol degrading experiments
Measure 100 mL and be placed in 200 mL tool plug triangular flasks containing the waste water of phenol, add the activated carbon supported Nanoscale Iron of 0.5 g; Triangular flask is placed in to shaking table, at 200 r/min, under room temperature (25 ℃) condition, reacts 2.5 h, make absorption reach balance.After reaction finishes, take out triangular flask, filter to isolate active carbon, at room temperature aeration 30 min of filtrate (wastewater containing phenol), make iron be completely oxidized to ferric iron, get 2.5mL filtrate in 50ml colorimetric cylinder, with after distilled water diluting, add the buffer solution of 0.5mL, mix, add the 4-AA solution of 1.00mL, mix, then add 1.0mL potassium ferricyanide solution, be diluted to assigned scale, fully mix, close plug, places 10 minutes, immediately at wavelength 510nm place, take distilled water as reference, survey absorbance, record data.
Claims (5)
1. a load type active carbon nano zero-valence iron material, it is characterized in that carrier is granular active carbon, the particle diameter of active carbon is between 0.2 ~ 0.45mm, more than the specific area 1500m2 of active carbon, immobilized inorganic material is nano zero valence iron particle, the iron of load is the Fe of zero-valent state, and the nano zero valence iron particle of load is of a size of 1 ~ 100nm, and the content of Fe is at 200-2000mg/g.
2. the preparation method of load type active carbon nano zero-valence iron material according to claim 1, comprises the following steps:
(A) pretreatment:
Particle diameter is limpid to supernatant by washed with de-ionized water at the active carbon of 0.2 ~ 0.45mm, then be placed in baking oven, at 105 ~ 110 ℃, dry to constant weight and (can first dry 2h, take out and weigh, be placed in again oven for drying 2h, repeat such operation, until front and back weigh difference, be not more than 0.02g), be stored in airtight vial.
(B) preparation of loaded with nano Zero-valent Iron:
Adopt liquid phase reduction: the active carbon that takes respectively 0.5g adds in the 0.05mol/L FeSO47H2O solution of 50mL, under room temperature (25 ℃) condition, be placed in constant temperature oscillator, the time that Fe2+ fully adsorbs in active carbon is at 30 ~ 120min, it is fully adsorbed, then, slowly add the solution with copperas solution isopyknic 0.2 ~ 2 mol/L NaBH4, be placed in constant temperature oscillator 30min, it is fully reacted, until no longer include bubble in solution, emerge, reaction finish after under 2500rpm centrifugal 10min, reaction equation is: 2Fe2++ BH4-+2H2O → 2Fe+BO2-+2H2+4H+.
(C) centrifugation its lytic activity charcoal loaded with nano-iron, in temperature, be 60 ℃, the deionized water washed product of the ultrasonic degas of 7 minutes rotating speed 3000rpm used times 3 times, use again absolute ethanol washing 3 times, proceed to vacuum desiccator dry, after being dried, obtain load type active carbon nano zero valence iron.
3. according to the application of load type active carbon nano zero-valence iron material described in claim 1 or 2, it is characterized in that the application in catalyzing and degrading pollutant.
4. the application of load type active carbon nano zero-valence iron material according to claim 3, is characterized in that load type active carbon nano zero-valence iron material is applied in water body methyl orange catalytic degradation.
5. the application of load type active carbon nano zero-valence iron material according to claim 3,, it is characterized in that load type active carbon nano zero-valence iron material is applied to Pyrogentisinic Acid's catalytic degradation in water body.
Priority Applications (1)
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| CN104437348A (en) * | 2014-11-12 | 2015-03-25 | 中国地质大学（武汉） | Uranium removing material for treating uranium-containing groundwater in situ and preparation method thereof |
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| WO2011047181A2 (en) * | 2009-10-14 | 2011-04-21 | The Administrators Of The Tulane Educational Fund | Novel multifunctional materials for in-situ environmental remediation of chlorinated hydrocarbons |
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| WO2021129137A1 (en) * | 2019-12-25 | 2021-07-01 | 华南理工大学 | Carbon-loaded nano zero-valent iron material, preparation method therefor and application thereof |
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| CN114735796A (en) * | 2022-05-16 | 2022-07-12 | 湖南工业大学 | Iron-based nano flocculant and preparation method and application thereof |
| CN115554645A (en) * | 2022-09-27 | 2023-01-03 | 丽珠集团福州福兴医药有限公司 | Method for treating antibiotic bacterial residues by hydrothermal cooperation of nZVI activated persulfate |
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