CN103011328A - Novel efficient grapheme loaded nano-iron material for adsorbing phosphorus in water - Google Patents
Novel efficient grapheme loaded nano-iron material for adsorbing phosphorus in water Download PDFInfo
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- CN103011328A CN103011328A CN2012105641972A CN201210564197A CN103011328A CN 103011328 A CN103011328 A CN 103011328A CN 2012105641972 A CN2012105641972 A CN 2012105641972A CN 201210564197 A CN201210564197 A CN 201210564197A CN 103011328 A CN103011328 A CN 103011328A
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Abstract
The invention relates to a novel efficient grapheme loaded nano-iron material for adsorbing phosphorus in water. The grapheme loaded nano-iron material is composed of nano-iron and grapheme, wherein the nano-iron accounts for 10-70 percent of the total weight of the material. The macrostructure of the material is powder-shaped, and as for the microstructure, the grapheme adopts a sheet-shaped structure, the nano-iron is uniformly dispersed on the surface of the grapheme, when the nano-iron accounts for 30 percent or less than 30 percent of the total weight of the material, the nano-iron adopts a dot-shaped structure, and when the nano-iron accounts for more than 30 percent of the total weight of the material, the nano-iron adopts a chain structure; the particle diameter of nano-iron is 50-70 nm; the nano-iron is loaded on grapheme, firstly, elemental iron reacts with hydrogen ions to generate ferrous iron, and then ferrous iron, phosphate radical and water molecules are reacted to quickly generate hydrated ferrous phosphate or hydrated iron phosphate; and under the condition that the initial concentration of phosphate radical in water is less than 4 mg/L, the grapheme loaded nano-iron can remove over 99 percent of phosphate radical, so that the effluent concentration of phosphate radical is under 0.02 mg/L, as a result, when the concentration of phosphate radical in inflow water quality of lakes is less than 0.02 mg/L, eutrophication cannot occur.
Description
Technical field
The present invention relates to the material of phosphorus in a kind of planar water, be specifically related to the graphene-supported nano-iron material of phosphorus in a kind of new and effective planar water.
Background technology
Eutrophication is the environmental problem that the world today pays close attention to, and a lot of lakes all once suffered the harm of eutrophication in the world.Eutrophication can cause a lot of problems, and for example it can reduce the transparence in lake, causes in the lake biomass to reduce and Blue-green Algae Fast Growth etc.It is the principal element that causes eutrophication that nutritive substance surplus, especially phosphorus concentration exceed standard.As the necessary nutritive element of algae, phosphorus plays vital effect in the eutrophication process.One of key of control eutrophication is exactly the concentration of controlling phosphorus in the water body.In order better to control the concentration of phosphorus in the water body, people have carried out a large amount of research in recent years.Although obtained certain achievement, also there is certain problem in present phosphorus removing method, for example be difficult to use chemical agent to carry out dephosphorization in the natural water, and the adsorption rate of material that can Phosphate Sorption is not high.
Nanoscale Iron is the hottest a kind of material of current environmental area, and Nanoscale Iron is the general name of 1 ~ 100nm Zero-valent Iron, and it has many good qualities, very large specific surface area for example, very high activity etc.Many advantages are removed a kind of in some most effective materials of pollutent so that it becomes environmental area.It is reported, Nanoscale Iron can adsorb many heavy metal contaminants, organic pollutant etc., and for example Nanoscale Iron is to Cr (VI), and Pb (II) and As (V) has very high removal efficient.Nanoscale Iron is except having plurality of advantages, also have some shortcomings that are difficult to overcome, for example Nanoscale Iron is easily oxidized in aerobic environment, the speed that Nanoscale Iron after the oxidation is removed pollutent obviously descends, Nanoscale Iron is easily reunited in depositing process simultaneously, Nanoscale Iron after reuniting becomes greatly gradually, also so that speed of reaction decline to a great extent.In order to alleviate this problem, people drop into a large amount of energy research Nanoscale Iron are loaded on the filler, and for example a lot of scholars just load on gac with Nanoscale Iron, on resin or the molecular sieve.Although after loading on these materials, the stability of Nanoscale Iron obtains certain reinforcement, the efficient of removing pollutent is also more stable, still has many studies show that, the stability of the Nanoscale Iron after overload is along with the variation of time descends gradually.
Since Nanoscale Iron has the ability of efficient removal pollutent, simultaneously Nanoscale Iron is loaded on the carrier, can alleviate to a certain extent the problem of Nanoscale Iron oxidation and reunion, so research Nanoscale Iron and Nanoscale Iron load on the carrier, carrying out the removal of Phosphorus From Wastewater, is important and efficient means that solve eutrophication.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the object of the present invention is to provide the graphene-supported nano-iron material of phosphorus in a kind of new and effective planar water, can make intubation machine realize the flexibility of spool is put, realized that automatization finishes the operation of empty spool intubate, improve production efficiency, and alleviated the artificial labour intensity of undue dependence.
For achieving the above object, the technical solution adopted in the present invention is:
The graphene-supported nano-iron material of phosphorus is comprised of Nanoscale Iron and Graphene in a kind of new and effective planar water, and wherein, Nanoscale Iron accounts for 10%～70% of material gross weight.
The macrostructure of described material is Powdered, its microtexture, Graphene are sheet structure, and Nanoscale Iron all is dispersed in the Graphene surface, become dots structure less than or equal to 30% the time when Nanoscale Iron accounts for the material gross weight, become chain-like structure greater than 30% the time when Nanoscale Iron accounts for the material gross weight.
The particle diameter of described Nanoscale Iron is 50～70nm.
Described Nanoscale Iron accounts for 20% of material gross weight.
Described Nanoscale Iron accounts for 40% of material gross weight.
Described Nanoscale Iron accounts for 60% of material gross weight.
The principle of phosphorus is in the material planar water of the present invention: Nanoscale Iron loads on the Graphene, and at first fe and hydrogen ion reaction generates ferrous iron, and afterwards, ferrous iron and phosphate radical, water molecules generate hypophosphite monohydrate ferrous iron or hypophosphite monohydrate iron fast.Whole process reaction speed is exceedingly fast.
Material of the present invention can be removed the phosphate radical in the water body efficiently, in the situation that in the water initial phosphate concentration less than 4mg/L, graphene-supported Nanoscale Iron can be removed the phosphate radical more than 99%, so that the water outlet phosphate concentration reaches below the 0.02mg/L, when phosphate concentration was less than 0.02mg/L in the lake becomes a mandarin water quality, eutrophication can not occur.Graphene-supported Nanoscale Iron front 10 minutes in reaction can adsorb the phosphate radical more than 70%, and the gac of Isodose, activated alumina will or can reach same effect for more time with 30 minutes.Empirical tests, the compound Freundlish isothermal adsorption of graphene-supported Nanoscale Iron adsorption isothermal curve curve indicates that its reaction is multilayer absorption.
According to China's " water environment quality standard " (GB3838-20021), surface water second standard (lake) phosphate concentration is not more than 0.025mg/L and gets final product, and the occurring in nature phosphorus-containing wastewater is mostly less than 4mg/L, therefore use the type material of this patent, treated Phosphorus From Wastewater acid group can be controlled at the surface water second standard, can not cause to surface water the harm of eutrophication through the phosphate radical index of processing water.
Description of drawings
Fig. 1 is graphene-supported Nanoscale Iron scanning electron microscope (SEM) photograph (Nanoscale Iron massfraction 40%).
Fig. 2 is graphene-supported Nanoscale Iron transmission electron microscope picture (Nanoscale Iron massfraction 40%).
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
The graphene-supported nano-iron material of phosphorus is comprised of Nanoscale Iron and Graphene in a kind of new and effective planar water of the present invention, and wherein, Nanoscale Iron accounts for 10%～70% of material gross weight.The macrostructure of material is Powdered, its microtexture, Graphene are sheet structure, and Nanoscale Iron all is dispersed in the Graphene surface, become dots structure less than or equal to 30% the time when Nanoscale Iron accounts for the material gross weight, become chain-like structure greater than 30% the time when Nanoscale Iron accounts for the material gross weight.
Preferably, the particle diameter of described Nanoscale Iron is 50～70nm.
Preferably, described Nanoscale Iron accounts for 20% of material gross weight.
Preferably, described Nanoscale Iron accounts for 40% of material gross weight.
Preferably, described Nanoscale Iron accounts for 60% of material gross weight.
Material of the present invention adopts in-situ synthesis, being about to the certain density ferric ion solutions that contains drips on the Graphene surface, treating that Graphene mixes with iron-containing liquor becomes after the glue, with its oven dry, drip again afterwards iron-containing liquor, and so forth, can control the ratio of iron in mixture, guarantee that simultaneously iron ion can major part load on the Graphene surface.At last, under logical nitrogen state, drip sodium borohydride to the Graphene of load iron ion surface, speed is 30 droplets/minute, and question response is abundant, and this material is positioned in the vacuum filtration machine suction filtration to dry.With this material preservation to containing in spirituous solution or the encloses container.
As shown in Figure 1, be the scanning electron microscope (SEM) photograph of graphene-supported Nanoscale Iron (the Nanoscale Iron massfraction is 40%), nano iron particles is dispersed in the Graphene surface,
As shown in Figure 2, can see more clearly, Graphene is laminate structure, on the Graphene surface, Nanoscale Iron is black, and general particle diameter is about 60nm, Nanoscale Iron is being the more even of Graphene surface dispersion simultaneously, and this lays the first stone for the efficient application of Nanoscale Iron.
The implementation result of material of the present invention is described below in conjunction with concrete application example:
Embodiment one:
Adding 100ml concentration in the 200ml Erlenmeyer flask is 4mg/L phosphate radical solution, adds the sorbing material that the 500mg Nanoscale Iron accounts for material gross weight 20%.Erlenmeyer flask is put into shaking table, and speed is 30 rev/mins, and Temperature Setting is 25 degrees centigrade.After 10 minutes, the phosphate radical of graphene-supported Nanoscale Iron absorption 80%.
Embodiment two:
Adding 100ml concentration in the 200ml Erlenmeyer flask is 4mg/L phosphate radical solution, adds the sorbing material that the 250mg Nanoscale Iron accounts for material gross weight 40%.Erlenmeyer flask is put into shaking table, and speed is 30 rev/mins, and Temperature Setting is 25 degrees centigrade.After 10 minutes, the phosphate radical of graphene-supported Nanoscale Iron absorption 73%.
Embodiment three:
Adding 100ml concentration in the 200ml Erlenmeyer flask is 4mg/L phosphate radical solution, adds the sorbing material that the 160mg Nanoscale Iron accounts for material gross weight 60%.Erlenmeyer flask is put into shaking table, and speed is 30 rev/mins, and Temperature Setting is 25 degrees centigrade.After 10 minutes, the phosphate radical of graphene-supported Nanoscale Iron absorption 70%.
Claims (6)
1. the graphene-supported nano-iron material of phosphorus in the new and effective planar water, it is characterized in that: be comprised of Nanoscale Iron and Graphene, wherein, Nanoscale Iron accounts for 10%～70% of material gross weight.
2. the graphene-supported nano-iron material of phosphorus in the new and effective planar water according to claim 1, it is characterized in that: the macrostructure of described material is Powdered, its microtexture, Graphene is sheet structure, Nanoscale Iron all is dispersed in the Graphene surface, become dots structure less than or equal to 30% the time when Nanoscale Iron accounts for the material gross weight, become chain-like structure greater than 30% the time when Nanoscale Iron accounts for the material gross weight.
3. the graphene-supported nano-iron material of phosphorus in the new and effective planar water according to claim 1 and 2, it is characterized in that: the particle diameter of described Nanoscale Iron is 50～70nm.
4. the graphene-supported nano-iron material of phosphorus in the new and effective planar water according to claim 1 and 2, it is characterized in that: described Nanoscale Iron accounts for 20% of material gross weight.
5. the graphene-supported nano-iron material of phosphorus in the new and effective planar water according to claim 1 and 2, it is characterized in that: described Nanoscale Iron accounts for 40% of material gross weight.
6. the graphene-supported nano-iron material of phosphorus in the new and effective planar water according to claim 1 and 2, it is characterized in that: described Nanoscale Iron accounts for 60% of material gross weight.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480332A (en) * | 2013-09-13 | 2014-01-01 | 厦门建霖工业有限公司 | Nano-iron and graphene compound purification material and preparation method and application of nano-iron and graphene compound purification material |
| CN103480333A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Compound grapheme absorption agent, method for preparing compound grapheme absorption agent and application of compound grapheme absorption agent |
| CN105251993A (en) * | 2015-09-21 | 2016-01-20 | 清华大学 | Method for preparing Fe-graphene particles with assistance of graphene oxide |
| CN105688813A (en) * | 2016-03-07 | 2016-06-22 | 西北工业大学 | Magnetic graphene adsorbing material for adsorbing phosphorus in water, preparation method and adsorption method |
| CN106111048A (en) * | 2016-07-12 | 2016-11-16 | 成都理工大学 | One is used for removing phosphatic eggshell loaded nano-iron material and preparation method thereof in water |
| CN108341488A (en) * | 2017-12-20 | 2018-07-31 | 中山市和智电子科技有限公司 | A kind of biological suspended packing for administering black and odorous water |
| CN108483668A (en) * | 2017-12-20 | 2018-09-04 | 中山市和智电子科技有限公司 | A kind of black and odorous water governing system |
| CN108585361A (en) * | 2017-12-20 | 2018-09-28 | 中山市和智电子科技有限公司 | A kind of black and odorous water processing system |
| CN110248914A (en) * | 2016-12-12 | 2019-09-17 | 阿德莱德大学 | Graphene for fertilizer application |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602920A (en) * | 2012-03-29 | 2012-07-25 | 南京大学 | Preparation method of iron-coated graphene nanocomposite material |
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2012
- 2012-12-21 CN CN2012105641972A patent/CN103011328A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602920A (en) * | 2012-03-29 | 2012-07-25 | 南京大学 | Preparation method of iron-coated graphene nanocomposite material |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480332A (en) * | 2013-09-13 | 2014-01-01 | 厦门建霖工业有限公司 | Nano-iron and graphene compound purification material and preparation method and application of nano-iron and graphene compound purification material |
| CN103480332B (en) * | 2013-09-13 | 2015-08-26 | 厦门建霖工业有限公司 | Nanoscale Iron Graphene composite purification material and preparation method thereof and application |
| CN103480333A (en) * | 2013-09-16 | 2014-01-01 | 华南理工大学 | Compound grapheme absorption agent, method for preparing compound grapheme absorption agent and application of compound grapheme absorption agent |
| CN103480333B (en) * | 2013-09-16 | 2016-05-04 | 华南理工大学 | A kind of compound Graphene adsorbent and preparation method thereof, application |
| CN105251993A (en) * | 2015-09-21 | 2016-01-20 | 清华大学 | Method for preparing Fe-graphene particles with assistance of graphene oxide |
| CN105251993B (en) * | 2015-09-21 | 2017-07-07 | 清华大学 | A kind of method that use graphene oxide auxiliary makes Fe graphene particles |
| CN105688813A (en) * | 2016-03-07 | 2016-06-22 | 西北工业大学 | Magnetic graphene adsorbing material for adsorbing phosphorus in water, preparation method and adsorption method |
| CN106111048A (en) * | 2016-07-12 | 2016-11-16 | 成都理工大学 | One is used for removing phosphatic eggshell loaded nano-iron material and preparation method thereof in water |
| CN110248914A (en) * | 2016-12-12 | 2019-09-17 | 阿德莱德大学 | Graphene for fertilizer application |
| CN108341488A (en) * | 2017-12-20 | 2018-07-31 | 中山市和智电子科技有限公司 | A kind of biological suspended packing for administering black and odorous water |
| CN108483668A (en) * | 2017-12-20 | 2018-09-04 | 中山市和智电子科技有限公司 | A kind of black and odorous water governing system |
| CN108585361A (en) * | 2017-12-20 | 2018-09-28 | 中山市和智电子科技有限公司 | A kind of black and odorous water processing system |
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Application publication date: 20130403 |