CN103964550A - Method for removing nitrate nitrogen in water body - Google Patents
Method for removing nitrate nitrogen in water body Download PDFInfo
- Publication number
- CN103964550A CN103964550A CN201410225034.0A CN201410225034A CN103964550A CN 103964550 A CN103964550 A CN 103964550A CN 201410225034 A CN201410225034 A CN 201410225034A CN 103964550 A CN103964550 A CN 103964550A
- Authority
- CN
- China
- Prior art keywords
- graphene
- nitrate nitrogen
- water body
- nanoscale iron
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention provides a method for removing nitrate nitrogen in a water body, which comprises the following steps: 1, adding ferrous sulfate heptahydrate, polyethyleneglycol and graphene into deoxidized distilled water, mixing to prepare a suspension, then adding a potassium borohydride solution into the suspension, stirring, filtering, and washing to obtain graphene loaded nano iron; and 2, uniformly mixing the graphene loaded nano iron and a water body to be treated, and then performing constant-temperature oscillation treatment, thus ensuring that the removal rate of nitrate nitrogen in the water body is above 85%. According to the invention, the nitrate nitrogen in the water body is removed by using the graphene loaded nano iron, so that the method is simple in technical process, low in production cost and easy to realize popularization and application, maximally keeps the favorable characteristics of graphene and nano iron, and can efficiently and quickly remove the nitrate nitrogen in the water body, thereby obviously improving the nitrate nitrogen removal effect and having wide application value.
Description
Technical field
The invention belongs to environmental chemistry technical field, be specifically related to a kind of method of removing nitrate nitrogen in water body.
Background technology
Along with industrial or agricultural and economic fast development, water pollutes also more and more serious in recent years.Nitrate nitrogen has become and has entered one of modal pollutent of water body, and pollute and there is the trend going from bad to worse, the raising meeting of Nitrate In Drinking Water concentration causes serious harm to the mankind's health, so in water body, the removal research of pollution of nitrate nitrogen has become the focus environmental problem that the whole world is paid close attention to.
In water body, pollution of nitrate nitrogen recovery technique is mainly divided three classes according to Principles: physical chemistry recovery technique, bioremediation technology and chemical reduction technology.Physical method mainly contains electrodialysis, reverse osmosis, distillation method, ion exchange method etc., because the required expense of nitrate nitrogen that physico-chemical process is removed in water is too high, and removes and does not have selectivity, removes not thoroughly, the transfer of pollutent has just occurred or concentrated.In thoroughly eliminating water body aspect two of pollution of nitrate nitrogen and reduction denitration cost, biological denitrification method is all to have dropped at present practical the best way, there is efficient low-consume feature, but biological method still has and is difficult to as follows the shortcoming that overcomes: can cause containing bacterium and residual organic matter in water outlet, must carry out the security of subsequent treatment process guarantee drinking water quality; Comparatively speaking, chemistry denitrogenation method is better than conventional biochemical process and Physical, with Physical, biochemical process comparison, chemistry denitrogenation method non-secondary pollution, speed of response is fast, floor space is little, because of reaction just can carry out at normal temperatures and pressures, to nitrate nitrogen clearance than high times of biochemical process efficiency.Wherein, take active metal reduction method that iron-deoxidize is representative former thereby receive some investigators' concern because reductive agent is cheap, speed of response is fast etc.
Nanoscale Iron has higher clearance to nitrate nitrogen, but reduzate is mainly ammonia nitrogen, and production rate is up to more than 90%, and initial reaction rate is not very high, can not well adapt to high concentration nitrate nitrogen and remove.In addition,, according to traditional method, adopt Nanoscale Iron to remove in the process of nitrate nitrogen, because Nanoscale Iron has stronger reuniting effect, in reaction process, can be partially or completely coated, cause the contact area of Nanoscale Iron and nitrate nitrogen significantly to reduce, speed of reaction reduces, and reacts not thorough.Current research all concentrates on finds certain catalyzer or modifying method, improves Nanoscale Iron and removes the speed of reaction of nitrate nitrogen and reduce ammonia nitrogen production rate.
Graphene, as a kind of new carbon of two-dirnentional structure, has unique structure and excellent performance.It has the specific surface area of super large, and theoretical value is up to 2630m
2/ g, electronic mobility is 15000cm
2v
-1s
-1, be the fastest material of current known electronic mobility, and with low cost, workability is good, and test substance is had to certain electrocatalysis, can realize good circulation ratio and recyclability.Graphene is widely used in the researchs such as battery electrode, heavy metal ion adsorbed, photochemical catalysis and electro-conductive material, but have not been reported removing aspect nitrate nitrogen.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and a kind of method of removing nitrate nitrogen in water body is provided.The method technological process is simple, can bring into play the good characteristic of Nanoscale Iron and Graphene simultaneously, and the clearance of nitrate nitrogen is significantly improved, and can remove efficiently, rapidly the nitrate nitrogen in water body, is with a wide range of applications.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of method of removing nitrate nitrogen in water body, it is characterized in that, and the method comprises the following steps:
Step 1, prepare graphene-supported Nanoscale Iron: iron vitriol, polyoxyethylene glycol and Graphene are added in deoxidation distilled water and mixed, obtain suspension liquid, then under agitation condition, in suspension liquid, drip solution of potassium borohydride, dropwise rear continuation and stir 20min～30min, obtain graphene-supported Nanoscale Iron after filtration with after washing; The add-on of described iron vitriol, polyoxyethylene glycol and Graphene is in every liter of deoxidation distilled water, to add 5g～10g iron vitriol, 0.1g～0.3g polyoxyethylene glycol and 2.5g～30g Graphene; The concentration of described solution of potassium borohydride is 0.8mol/L～1.2mol/L, and the volume of described solution of potassium borohydride is 15%～30% of deoxidation distilled water volume;
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron described in step 1 with process water body and add in reaction flask and mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, it is 20 ℃～30 ℃, oscillation frequency is the 30min～90min that vibrates under the condition of 50r/min～80r/min, and it is more than 85% making the clearance of nitrate nitrogen in the water body after processing; In described staying water, the concentration of nitrate nitrogen is 30mg/L～80mg/L, and the solid-to-liquid ratio of described graphene-supported Nanoscale Iron and staying water is 1: (100～200).
A kind of above-mentioned method of removing nitrate nitrogen in water body, is characterized in that, the drop rate of solution of potassium borohydride described in step 1 is 0.8mL/min～1.5mL/min.
A kind of above-mentioned method of removing nitrate nitrogen in water body, is characterized in that, described in step 1, in graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is (2.5～15): 1.
A kind of above-mentioned method of removing nitrate nitrogen in water body, it is characterized in that, the add-on of iron vitriol described in step 1, polyoxyethylene glycol and Graphene is in every liter of deoxidation distilled water, to add 7.5g iron vitriol, 0.15g polyoxyethylene glycol and 3.75g～22.5g Graphene.
A kind of above-mentioned method of removing nitrate nitrogen in water body, is characterized in that, the speed stirring described in step 1 is 120r/min～240r/min.
A kind of above-mentioned method of removing nitrate nitrogen in water body, is characterized in that, the preparation process of graphene-supported Nanoscale Iron described in step 1 is carried out under the protection of inert atmosphere or nitrogen atmosphere.
Know-why of the present invention is: iron vitriol is 2Fe with reacting of POTASSIUM BOROHYDRIDE
2++ BH
4 -+ 3H
2o → 2Fe ↓+B (OH)
3+ 3.5H
2↑, the present invention makes full use of Zero-valent Iron and has reductibility, can be the characteristic that ammonia nitrogen is removed by the reducing nitrate radical in water body, first iron is made to nano-level iron powder, can enlarge markedly specific surface area, the speed of Accelerating reduction reaction, and making full use of Graphene, to have specific surface area large, the features such as transportation velocity of electrons is exceedingly fast, Nanoscale Iron is carried on to Graphene surface, make Nanoscale Iron be attached to Graphene surface, avoid Nanoscale Iron to reunite, increased reaction surface, the clearance of nitrate nitrogen is significantly improved, final efficient, remove rapidly the nitrate nitrogen in water body.
The present invention compared with prior art has the following advantages:
The stable in properties of the graphene-supported Nanoscale Iron that 1, prepared by the present invention, can remove the nitrate nitrogen in water body efficiently, rapidly, and removal efficiency is high.
2, the present invention utilizes the method for nitrate nitrogen in black alkene loaded with nano-iron removal water body simple, and production cost is low, is easy to apply.
3, the present invention carries out in the process of graphene-supported Nanoscale Iron in water medium; do not use strong oxidizer; farthest protected the good characteristic of Graphene; the degradation efficiency of nitrate nitrogen in water body is further improved; nontoxic to environment, can not cause secondary pollution to environment.
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of the embodiment of the present invention 1 graphene-supported Nanoscale Iron.
Fig. 2 reacts the scanning electron microscope (SEM) photograph after 30min in the graphene-supported Nanoscale Iron of the embodiment of the present invention 1 water body that is 50mg/L in nitrate nitrogen concentration.
Fig. 3 reacts the scanning electron microscope (SEM) photograph after 60min in the graphene-supported Nanoscale Iron of the embodiment of the present invention 1 water body that is 50mg/L in nitrate nitrogen concentration.
Fig. 4 is the correlation curve of the nitrate nitrogen clearance of the graphene-supported Nanoscale Iron of the embodiment of the present invention 1 and comparative example 1 Nanoscale Iron.
Fig. 5 is the correlation curve of the nitrate nitrogen clearance of the graphene-supported Nanoscale Iron of the embodiment of the present invention 1 under different nitrate nitrogen concentration conditions.
Embodiment
Embodiment 1
The method that the present embodiment is removed nitrate nitrogen in water body is:
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, after 0.75g iron vitriol and 0.015g PEG-4000 are dissolved in 100mL deoxidation distilled water completely, add 0.75g Graphene to mix and obtain suspension liquid, then under the condition that nitrogen protection and stir speed (S.S.) are 200r/min, in suspension liquid, slowly drip the solution of potassium borohydride that 20mL concentration is 1.0mol/L, the drop rate of controlling solution of potassium borohydride is 1.0mL/min, dropwise rear continuation with the stir speed (S.S.) stirring 20min of 120r/min, under the protection of nitrogen atmosphere, filter afterwards, and with deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 5: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be to add in reaction flask at 1: 150 to mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, be 25 ℃, 60min vibrates under the condition that oscillation frequency is 60r/min; In described staying water, the concentration of nitrate nitrogen is 50mg/L.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
The scanning electron microscope (SEM) photograph of the embodiment of the present invention 1 graphene-supported Nanoscale Iron as shown in Figure 1, in the water body that graphene-supported Nanoscale Iron is 50mg/L in nitrate nitrogen concentration, react scanning electron microscope (SEM) photograph after 30min as shown in Figure 2, in the water body that graphene-supported Nanoscale Iron is 50mg/L in nitrate nitrogen concentration, react scanning electron microscope (SEM) photograph after 60min as shown in Figure 3.As seen from Figure 1, graphene-supported Nanoscale Iron, before the reaction of removing nitrate nitrogen, can obviously find out that the black sheet in Fig. 1 is Graphene, is of a size of several or tens microns; White granular is Nanoscale Iron, and particle diameter is 20～80nm approximately, and Nanoscale Iron presents cluster-shaped on Graphene.As seen from Figure 2, after China ink alkene loaded with nano-iron reacts 30min with nitrate nitrogen, Nanoscale Iron is become cotton-shaped by particulate state, and Graphene surface is generated thing and covers, make between Graphene inter-adhesively, on Graphene surface, also have more unreacted particulate state Nanoscale Iron.As seen from Figure 3, after black alkene loaded with nano-iron reacts 60min with nitrate nitrogen, the floss that Graphene is generated covers completely, substantially can not see unreacted particulate state Nanoscale Iron.
Embodiment 2
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, after 0.75g iron vitriol and 0.015g PEG-4000 are dissolved in 100mL deoxidation distilled water completely, add 0.375g Graphene to mix and obtain suspension liquid, then under the condition that nitrogen protection and stir speed (S.S.) are 240r/min, in suspension liquid, slowly drip the solution of potassium borohydride that 20mL concentration is 1.0mol/L, the drop rate of controlling solution of potassium borohydride is 1.2mL/min, dropwise rear continuation with the stir speed (S.S.) stirring 20min of 240r/min, filter afterwards, and with deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 2.5: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be to add in reaction flask at 1: 150 to mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, be 25 ℃, 30min～90min vibrates under the condition that oscillation frequency is 120r/min; In described staying water, the concentration of nitrate nitrogen is 30mg/L～80mg/L.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
Embodiment 3
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, after 0.75g iron vitriol and 0.015g PEG-4000 are dissolved in 100mL deoxidation distilled water completely, add 1.125g Graphene to mix and obtain suspension liquid, then under the condition that nitrogen protection and stir speed (S.S.) are 200r/min, in suspension liquid, slowly drip the solution of potassium borohydride that 20mL concentration is 1.0mol/L, the drop rate of controlling solution of potassium borohydride is 1.0mL/min, dropwise rear continuation with the stir speed (S.S.) stirring 20min of 120r/min, filter afterwards, and with deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 7.5: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be to add in reaction flask at 1: 150 to mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, be 25 ℃, 30min～90min vibrates under the condition that oscillation frequency is 150r/min; In described staying water, the concentration of nitrate nitrogen is 30mg/L～80mg/L.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
Embodiment 4
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, after 0.75g iron vitriol and 0.015g PEG-4000 are dissolved in 100mL deoxidation distilled water completely, add 2.25g Graphene to mix and obtain suspension liquid, then under the condition that nitrogen protection and stir speed (S.S.) are 150r/min, in suspension liquid, slowly drip the solution of potassium borohydride that 20mL concentration is 1.0mol/L, the drop rate of controlling solution of potassium borohydride is 1.5mL/min, dropwise rear continuation with the stir speed (S.S.) stirring 20min of 150r/min, filter afterwards, and with deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 15: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be 1: (100～200) add in reaction flask and mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, be 25 ℃, 30min～90min vibrates under the condition that oscillation frequency is 60r/min; In described staying water, the concentration of nitrate nitrogen is 30mg/L～80mg/L.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
Embodiment 5
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, by 0.5g iron vitriol, 0.01g PEG-4000 and 0.25g Graphene add in 100mL deoxidation distilled water and mix, obtain suspension liquid, then under the agitation condition that is 120r/min in nitrogen protection and stir speed (S.S.), the drop rate of 1.5mL/min of take drips the solution of potassium borohydride that 15mL concentration is 0.8mol/L in suspension liquid, dropwise rear continuation with the stir speed (S.S.) stirring 30min of 120r/min, after filtering, first use deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 2.5: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be to add in reaction flask at 1: 100 to mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, it is 20 ℃, oscillation frequency is the 30min that vibrates under the condition of 50r/min, and in described staying water, the concentration of nitrate nitrogen is 30mg/L.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
Embodiment 6
Step 1, prepare graphene-supported Nanoscale Iron: under the protection of nitrogen atmosphere, by 1g iron vitriol, 0.03g PEG-4000 and 3g Graphene add in 100mL deoxidation distilled water and mix, obtain suspension liquid, then under the agitation condition that is 240r/min in nitrogen protection and stir speed (S.S.), take the drop rate of 0.8mL/min as drip the solution of potassium borohydride that 30mL concentration is 1.2mol/L in suspension liquid, dropwise rear continuation with the stir speed (S.S.) stirring 20min of 240r/min, after filtering, first use deoxidation distilled water wash three times, use again absolute ethanol washing three times, obtain graphene-supported Nanoscale Iron, be kept at in the moisture eliminator of nitrogen protection, in described graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is 15: 1,
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: by graphene-supported Nanoscale Iron and staying water described in step 1, by solid-to-liquid ratio, to be to add in reaction flask at 1: 200 to mix, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, be 30 ℃, in staying water, the concentration of nitrate nitrogen is 80mg/L described in the 90min that vibrates under the condition that oscillation frequency is 80r/min.
In water body after the present embodiment is processed, the clearance of nitrate nitrogen is more than 85%.
The graphene-supported Nanoscale Iron of the present invention is removed to the effect of nitrate nitrogen in water body and carried out following checking.
One, the removal effect of the graphene-supported Nanoscale Iron of the present invention and traditional Nanoscale Iron is analyzed:
Comparative example 1
This comparative example utilizes Nanoscale Iron to remove the nitrate nitrogen in water body, and the dosage of iron is identical with embodiment 1, and the process of removing nitrate nitrogen in water body is identical with the step 2 of embodiment 1.
The embodiment of the present invention 1 and the removal effect of comparative example 1 are carried out to contrast test, and test result is shown in Fig. 4.
As can be seen from Figure 4, dosage at iron is identical, and under the identical condition of reaction environment, the speed ratio tradition Nanoscale Iron that the graphene-supported Nanoscale Iron of the present invention is removed nitrate nitrogen is a lot of soon, only in 30min, just approximately 85% nitrate nitrogen can be removed, 60min just can remove more than 95% nitrate nitrogen.And only can remove approximately 60% nitrate nitrogen after common Nanoscale Iron reaction 60min.As can be seen here, the graphene-supported Nanoscale Iron of the present invention has better removal effect than traditional Nanoscale Iron.
Two, the concentration of nitrate nitrogen in water body is analyzed the impact of the removal efficiency of the graphene-supported Nanoscale Iron of the present invention:
It is in the 150ml aqueous solution of 30mg/L, 50mg/L, 80mg/L and 120mg/L that the graphene-supported Nanoscale Iron of the embodiment of the present invention 1 (the Nanoscale Iron amount of load is 1.0g) is added respectively to the concentration containing nitrate nitrogen, then be placed in water bath with thermostatic control vibrator, in temperature, be under the condition of 25 ℃, with the oscillation frequency of the 60 beats/min 90min that vibrates, the impact of the concentration of nitrate nitrogen on the removal efficiency of the graphene-supported Nanoscale Iron of the present invention in water body, test result as shown in Figure 5.As shown in Figure 5, in water body, nitrate nitrogen concentration is when 80mg/L is following, and the graphene-supported Nanoscale Iron of the present invention can be realized the quick removal to nitrate nitrogen in 90min, and removal effect is remarkable.Based on above analysis, it is that the water body of 30mg/L～80mg/L is processed that the present invention finally chooses nitrate nitrogen concentration, and graphene-supported Nanoscale Iron can be removed the nitrate nitrogen in water body more than 85% in the short period of time, and removal effect is remarkable.
The present invention prepares the process of graphene-supported Nanoscale Iron and can in the commercially available glove box being easy to get, carry out.The present invention carries out the operations such as the interpolation of material and stirring, filtration, washing in the glove box that is full of inertia or nitrogen atmosphere all can rely on existing techniques in realizing.
The above, be only preferred embodiment of the present invention, not the present invention imposed any restrictions.Every any simple modification of above embodiment being done according to invention technical spirit, change and equivalence change, and all still belong in the protection domain of technical solution of the present invention.
Claims (6)
1. a method of removing nitrate nitrogen in water body, is characterized in that, the method comprises the following steps:
Step 1, prepare graphene-supported Nanoscale Iron: iron vitriol, polyoxyethylene glycol and Graphene are added in deoxidation distilled water and mixed, obtain suspension liquid, then under agitation condition, in suspension liquid, drip solution of potassium borohydride, dropwise rear continuation and stir 20min～30min, obtain graphene-supported Nanoscale Iron after filtration with after washing; The add-on of described iron vitriol, polyoxyethylene glycol and Graphene is in every liter of deoxidation distilled water, to add 5g～10g iron vitriol, 0.1g～0.3g polyoxyethylene glycol and 2.5g～30g Graphene; The concentration of described solution of potassium borohydride is 0.8mol/L～1.2mol/L, and the volume of described solution of potassium borohydride is 15%～30% of deoxidation distilled water volume;
Step 2, adopt graphene-supported Nanoscale Iron to remove the nitrate nitrogen in water body: graphene-supported Nanoscale Iron and staying water described in step 1 are added in reaction flask and mixed, then the reaction flask that is loaded with graphene-supported Nanoscale Iron and staying water is placed in to water bath with thermostatic control vibrator, in temperature, it is 20 ℃～30 ℃, oscillation frequency is the 30min～90min that vibrates under the condition of 50r/min～80r/min, and it is more than 85% making the clearance of nitrate nitrogen in the water body after processing; In described staying water, the concentration of nitrate nitrogen is 30mg/L～80mg/L, and the solid-to-liquid ratio of described graphene-supported Nanoscale Iron and staying water is 1: (100～200).
2. a kind of method of removing nitrate nitrogen in water body according to claim 1, is characterized in that, the drop rate of solution of potassium borohydride described in step 1 is 0.8mL/min～1.5mL/min.
3. a kind of method of removing nitrate nitrogen in water body according to claim 1, is characterized in that, described in step 1, in graphene-supported Nanoscale Iron, the mass ratio of Graphene and Nanoscale Iron is (2.5～15): 1.
4. a kind of method of removing nitrate nitrogen in water body according to claim 1, it is characterized in that, the add-on of iron vitriol described in step 1, polyoxyethylene glycol and Graphene is in every liter of deoxidation distilled water, to add 7.5g iron vitriol, 0.15g polyoxyethylene glycol and 3.75g～22.5g Graphene.
5. a kind of method of removing nitrate nitrogen in water body according to claim 1, is characterized in that, the speed stirring described in step 1 is 120r/min～240r/min.
6. a kind of method of removing nitrate nitrogen in water body according to claim 1, is characterized in that, the preparation process of graphene-supported Nanoscale Iron described in step 1 is carried out under the protection of inert atmosphere or nitrogen atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410225034.0A CN103964550A (en) | 2014-05-24 | 2014-05-24 | Method for removing nitrate nitrogen in water body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410225034.0A CN103964550A (en) | 2014-05-24 | 2014-05-24 | Method for removing nitrate nitrogen in water body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103964550A true CN103964550A (en) | 2014-08-06 |
Family
ID=51234617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410225034.0A Pending CN103964550A (en) | 2014-05-24 | 2014-05-24 | Method for removing nitrate nitrogen in water body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103964550A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525159A (en) * | 2015-01-13 | 2015-04-22 | 张一梅 | Preparation method of heavy metal ion adsorbent |
| CN105217741A (en) * | 2015-09-21 | 2016-01-06 | 清华大学 | A kind of Fe-Graphene high efficiency particulate removes the method for nitrate in groundwater |
| CN105233812A (en) * | 2015-09-29 | 2016-01-13 | 安徽省绿巨人环境技术有限公司 | Preparation method of adsorbent for removing trivalent chromium ions from wastewater |
| CN105417647A (en) * | 2016-01-08 | 2016-03-23 | 四川师范大学 | Method for removing nitrate nitrogen in water with thermometal as reducing agent |
| CN105417800A (en) * | 2016-01-08 | 2016-03-23 | 四川师范大学 | Environment-friendly method for removing nitrate nitrogen in waste water |
| CN105540954A (en) * | 2016-01-08 | 2016-05-04 | 四川师范大学 | Method for removing nitrate nitrogen in water through chemical denitrification |
| CN105621759A (en) * | 2016-01-08 | 2016-06-01 | 四川师范大学 | Method for efficiently and environmentally removing nitrogen nitrate in water |
| CN107640814A (en) * | 2017-10-27 | 2018-01-30 | 上海纳米技术及应用国家工程研究中心有限公司 | The method of nitrate in in-situ reducing degradation water |
| CN109174196A (en) * | 2018-08-10 | 2019-01-11 | 南通寰宇博新化工环保科技有限公司 | A kind of preparation method of chelating resin load copper-iron double metal nano material |
| CN110316806A (en) * | 2019-06-11 | 2019-10-11 | 同济大学 | A kind of nanocomposite nZVFPG and its preparation method and application removed for nitrate nitrogen in water |
| CN111530464A (en) * | 2020-05-13 | 2020-08-14 | 盐城工学院 | Preparation method of three-dimensional graphene zero-valent iron-carrying composite material |
| CN115448439A (en) * | 2022-09-22 | 2022-12-09 | 重庆工商大学 | Method for removing nitrate nitrogen in water body by combining nano zero-valent iron/reduced graphene oxide composite material with oxidant |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805065A (en) * | 2010-04-13 | 2010-08-18 | 南开大学 | Method for remediating pollution of nitrate nitrogen in underground water |
| 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 |
-
2014
- 2014-05-24 CN CN201410225034.0A patent/CN103964550A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101805065A (en) * | 2010-04-13 | 2010-08-18 | 南开大学 | Method for remediating pollution of nitrate nitrogen in underground water |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 李斌: "石墨烯负载纳米铁去除地下水中硝酸盐氮的技术研究", 《中国优秀硕士学位论文全文数据库（工程科技I辑）》, no. 5, 15 May 2014 (2014-05-15) * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104525159A (en) * | 2015-01-13 | 2015-04-22 | 张一梅 | Preparation method of heavy metal ion adsorbent |
| CN105217741A (en) * | 2015-09-21 | 2016-01-06 | 清华大学 | A kind of Fe-Graphene high efficiency particulate removes the method for nitrate in groundwater |
| CN105233812A (en) * | 2015-09-29 | 2016-01-13 | 安徽省绿巨人环境技术有限公司 | Preparation method of adsorbent for removing trivalent chromium ions from wastewater |
| CN105621759A (en) * | 2016-01-08 | 2016-06-01 | 四川师范大学 | Method for efficiently and environmentally removing nitrogen nitrate in water |
| CN105417800A (en) * | 2016-01-08 | 2016-03-23 | 四川师范大学 | Environment-friendly method for removing nitrate nitrogen in waste water |
| CN105540954A (en) * | 2016-01-08 | 2016-05-04 | 四川师范大学 | Method for removing nitrate nitrogen in water through chemical denitrification |
| CN105417647A (en) * | 2016-01-08 | 2016-03-23 | 四川师范大学 | Method for removing nitrate nitrogen in water with thermometal as reducing agent |
| CN107640814A (en) * | 2017-10-27 | 2018-01-30 | 上海纳米技术及应用国家工程研究中心有限公司 | The method of nitrate in in-situ reducing degradation water |
| CN109174196A (en) * | 2018-08-10 | 2019-01-11 | 南通寰宇博新化工环保科技有限公司 | A kind of preparation method of chelating resin load copper-iron double metal nano material |
| CN109174196B (en) * | 2018-08-10 | 2021-12-28 | 南通寰宇博新化工环保科技有限公司 | Preparation method of chelate resin loaded copper-iron bimetallic nano-material |
| CN110316806A (en) * | 2019-06-11 | 2019-10-11 | 同济大学 | A kind of nanocomposite nZVFPG and its preparation method and application removed for nitrate nitrogen in water |
| CN111530464A (en) * | 2020-05-13 | 2020-08-14 | 盐城工学院 | Preparation method of three-dimensional graphene zero-valent iron-carrying composite material |
| CN115448439A (en) * | 2022-09-22 | 2022-12-09 | 重庆工商大学 | Method for removing nitrate nitrogen in water body by combining nano zero-valent iron/reduced graphene oxide composite material with oxidant |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103964550A (en) | Method for removing nitrate nitrogen in water body | |
| Zhao et al. | Progress on the photocatalytic reduction removal of chromium contamination | |
| CN103599751B (en) | The preparation method of thiol-functionalizedmagnetic magnetic silica nano-material | |
| CN108031433A (en) | A kind of preparation method of mesoporous calcium silicates load nano zero-valence iron composite material | |
| CN102000573B (en) | Modified activated carbon and application thereof | |
| CN104289250A (en) | Loaded type ozone catalyst and preparation method and application thereof | |
| CN107930629A (en) | The preparation method of support type charcoal catalysis material | |
| CN107983295B (en) | Core-shell structure iron-copper bi-metal material and its preparation method and application | |
| CN107442082A (en) | A kind of magnetic polyacrylamide/alginic acid zirconium gel ball and its preparation method and application | |
| Liu et al. | Selective reduction of nitrate into nitrogen using Cu/Fe bimetal combined with sodium sulfite | |
| CN107081123A (en) | Magnetic magnesium hydroxide adsorbent and preparation method thereof | |
| WO2011034327A2 (en) | Absorbent containing chitosan for treating water and method for manufacturing same | |
| CN108514870B (en) | Hydrotalcite-poly (m-phenylenediamine) composite material and preparation method and application thereof | |
| CN105617995A (en) | Preparation method and application of nitrilotriacetic acid modified magnetic graphene oxide composite material | |
| CN109205753A (en) | Modified iron-copper bi-metal nano particle and preparation method thereof | |
| CN111018037B (en) | Method for removing heavy metal mercury ions in water based on polyacrylonitrile nano-film compound | |
| Meng et al. | N-doped MoS2 nanoflowers for efficient Cr (VI) removal | |
| CN105664894A (en) | Preparation method of purifying material for selectively removing positive trivalent arsenic from water body | |
| CN104353437A (en) | Core-shell magnetic poly(m-phenylene diamine) nano-particle, preparation method and application thereof | |
| Guo et al. | Chemical Reduction of Nitrate Using Nanoscale Bimetallic Iron/Copper Particles. | |
| Zhu et al. | Simple and green method for preparing copper nanoparticles supported on carbonized cotton as a heterogeneous Fenton-like catalyst | |
| CN106946375A (en) | A kind of nano zero valence iron joint ion exchange resin goes the method for total nitrogen and application in water removal | |
| CN108328677B (en) | Multifunctional environment-friendly composite material and preparation method and application thereof | |
| CN108358299B (en) | Treatment process for catalytic degradation of dye wastewater by ozone | |
| CN104439270A (en) | Method for preparing sodium alginate/beta-cyclodextrin collaborative immobilized nanometer zero-valent iron |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140806 |