CN106315818B - Application of V2O5/CeO2 nanocomposite in degradation of wastewater containing cephalexin - Google Patents
Application of V2O5/CeO2 nanocomposite in degradation of wastewater containing cephalexin Download PDFInfo
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- CN106315818B CN106315818B CN201610842237.3A CN201610842237A CN106315818B CN 106315818 B CN106315818 B CN 106315818B CN 201610842237 A CN201610842237 A CN 201610842237A CN 106315818 B CN106315818 B CN 106315818B
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- 229910000422 cerium(IV) oxide Inorganic materials 0.000 title claims abstract description 54
- ZAIPMKNFIOOWCQ-UEKVPHQBSA-N cephalexin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@@H]3N(C2=O)C(=C(CS3)C)C(O)=O)=CC=CC=C1 ZAIPMKNFIOOWCQ-UEKVPHQBSA-N 0.000 title claims abstract description 44
- 229940106164 cephalexin Drugs 0.000 title claims abstract description 44
- 239000002114 nanocomposite Substances 0.000 title claims abstract description 42
- 239000002351 wastewater Substances 0.000 title claims abstract description 39
- 230000015556 catabolic process Effects 0.000 title claims abstract description 16
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 16
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 title description 7
- 230000010355 oscillation Effects 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 230000002045 lasting effect Effects 0.000 claims description 2
- 230000003115 biocidal effect Effects 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 8
- 230000009514 concussion Effects 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000006555 catalytic reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000002835 absorbance Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 229930186147 Cephalosporin Natural products 0.000 description 2
- 239000004098 Tetracycline Substances 0.000 description 2
- 229940124587 cephalosporin Drugs 0.000 description 2
- 150000001780 cephalosporins Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- -1 sulphur Amine Chemical class 0.000 description 2
- 235000019364 tetracycline Nutrition 0.000 description 2
- 150000003522 tetracyclines Chemical class 0.000 description 2
- 229940040944 tetracyclines Drugs 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- XWNSFEAWWGGSKJ-UHFFFAOYSA-N 4-acetyl-4-methylheptanedinitrile Chemical compound N#CCCC(C)(C(=O)C)CCC#N XWNSFEAWWGGSKJ-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 208000035240 Disease Resistance Diseases 0.000 description 1
- 206010059866 Drug resistance Diseases 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 description 1
- 229930182555 Penicillin Natural products 0.000 description 1
- 239000004153 Potassium bromate Substances 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229940126575 aminoglycoside Drugs 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000003907 kidney function Effects 0.000 description 1
- 230000003908 liver function Effects 0.000 description 1
- 239000003120 macrolide antibiotic agent Substances 0.000 description 1
- 229940041033 macrolides Drugs 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 150000002960 penicillins Chemical class 0.000 description 1
- 229940094037 potassium bromate Drugs 0.000 description 1
- 235000019396 potassium bromate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000007660 quinolones Chemical class 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000837 restrainer Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000000870 ultraviolet spectroscopy Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/08—Nanoparticles or nanotubes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The invention belongs to the processing technology fields of antibiotic, specifically disclose V2O5/CeO2Application of the nanocomposite in degradation waste water containing cefalexin.The initial concentration of cefalexin is in 20 ~ 120 mg/L, pH value of waste water 2 ~ 7 in adjusting waste water, and then 5 ~ 30 mg V are added in every 20mL waste water2O5/CeO2Nanocomposite, finally 1 ~ 6h of constant temperature oscillation at 25 ~ 70 DEG C.V2O5/CeO2Nanocomposite has apparent oxidation catalysis effect to cefalexin antibiotic, is 40mg/L, wastewater pH 3 in waste strength, dosage is 20mg, temperature is 50 DEG C, and degradation effect is best under conditions of the concussion time is 2h, and removal efficiency is up to 64.54 ~ 69.13%.In V2O5/CeO2Under the best degradation condition of nanocomposite, V2O5/CeO2Nanocomposite is than simple nano Ce O2Degrade cefalexin antibiotic effect is more preferable, efficiency faster.
Description
Technical field
The invention belongs to the processing technology fields of antibiotic, and in particular to V2O5/CeO2Nanocomposite contains head in degradation
Application in cefalexin waste water.
Background technique
China is in the world using the more country of antibiotic, but due to lacking always for many years about antibiosis
The more accurately emissions data of element, so having no knowledge about China so far to the real behaviour in service of antibiotic.Recently, according to
The investigation that the Chinese Academy of Sciences carries out the service condition of the antibiotic of various regions shows China about 50,000 2013 this year
Ton waste containing antibiotic is discharged into soil and water resources, this is higher than American-European-Japanese equal developed countries far away.Due to antibiotic
It is a large amount of to use, so that it is caused potential hazard to human health and environment, especially to the growth and development of child.To child
Speech can reduce the disease resistance of child to body input antibiotic, damage the hepatic and renal function of child, flora in child's body is caused to lose
It adjusts, causes human allergy to react, drug tolerant bacteria, i.e. superbacteria more frighteningly occur.Some researches show that microorganism drug resistances
The development of property has been able to keep up with the even more than mankind to new antibiotic development and production speed.The antibiotic to come into operation now
There are penicillins, cephalosporins, lactamase restrainer, aminoglycoside, amides, macrolides, Tetracyclines, sulphur
Amine, quinolones, furans, nitre imidazoles, wherein Tetracyclines due to its harm it is bigger, had logged out market, and
Cephalosporins be used to treat various diseases, and a large amount of using cannot but be absorbed by organisms completely, the waste of discharge is to ring
Cause very big pollution in border, it is therefore desirable to search out the simple and fast effective method of one kind and handle antibiotic.
Summary of the invention
To overcome existing antibiotic treatment problem, the purpose of the present invention is intended to provide a kind of V2O5/CeO2Nanocomposite
Application in degradation waste water containing cefalexin.
To achieve the above object, the technical solution adopted by the present invention is as follows:
V2O5/CeO2Application of the nanocomposite in degradation waste water containing cefalexin: cefalexin in waste water is adjusted
Initial concentration is in 20 ~ 120 mg/L, pH value of waste water 2 ~ 7, and then 5 ~ 30 mg V are added in every 20mL waste water2O5/CeO2Nanometer is multiple
Condensation material, finally 1 ~ 6h of constant temperature oscillation at 25 ~ 70 DEG C.
Most preferably, the initial concentration of cefalexin is in 40 mg/L, pH value of waste water 3 in adjusting waste water, and then every 20mL is useless
20 mg V are added in water2O5/CeO2Nanocomposite, finally the constant temperature oscillation 2h at 50 DEG C.
Further, V2O5/CeO2Nanocomposite prepares by the following method: by ammonium metavanadate and nano Ce O2, add water
After stirring and dissolving, lasting stirring is lower to impregnate at least 12h, is then evaporated cooling, then roast at least 4h at 300 ~ 350 DEG C, natural
It is cooled to room temperature to obtain V2O5/CeO2Nanocomposite.
In the present invention, nano Ce O2It can be obtained by prior art preparation.
The utility model has the advantages that
(1) V2O5/CeO2Nanocomposite has apparent oxidation catalysis effect to cefalexin antibiotic, in waste water
Concentration is 40mg/L, wastewater pH 3, dosage 20mg, and temperature is 50 DEG C, and degradation effect is most under conditions of the concussion time is 2h
Good, removal efficiency is up to 64.54 ~ 69.13%；
(2) it is experimentally confirmed, in V2O5/CeO2Under the best degradation condition of nanocomposite, V2O5/CeO2Nanometer is multiple
Condensation material is than simple nano Ce O2Degrade cefalexin antibiotic effect is more preferable, efficiency faster.
Detailed description of the invention
Fig. 1: nano Ce O2XRD diagram.
Fig. 2: nano Ce O2SEM figure.
Fig. 3: V2O5/CeO2The XRD diagram of nanocomposite.
Fig. 4: V2O5/CeO2The SEM figure that nanocomposite is obtained in different zones scanning.
Fig. 5: the standard curve of cefalexin.
Fig. 6: the cefalexin removal rate under different pH.
Fig. 7: the cefalexin removal rate under different antibiotic initial concentrations.
Fig. 8: the cefalexin removal rate under different temperatures.
Fig. 9: different V2O5/CeO2Cefalexin removal rate under nanocomposite dosage.
Figure 10: the cefalexin removal rate under the difference concussion time.
Figure 11: V2O5/CeO2Nanocomposite and simple nano Ce O2The histogram effect pair of degradation cefalexin
Than.
Specific embodiment
Many details are elaborated in the description of specific embodiment below to facilitate a thorough understanding of the present invention, still originally
Invention can also be implemented using other than the one described here other way, therefore the present invention is not by following public specific
The limitation of embodiment.
The influence of embodiment 1--pH value
The first step prepares nano Ce O2:
Firstly, weighing the Ce(NO of 0.585g with a ten thousandth balance3)3·6H2O is put into large beaker, is then weighed again
The potassium bromate of 2.25g pours into large beaker, the stirring and dissolving on magnetic stirring apparatus is added after the deionized water of 100ml, after dissolution
It weighs 0.60g altheine to be added in large beaker, and allows it sufficiently to dissolve until solution clarification, is subsequently poured into polytetrafluoroethyl-ne
In the reaction kettle of alkene, reaction kettle is put into baking oven, set temperature is 140 DEG C, and reaction is taken out afterwards for 24 hours to be cooled to room temperature, will
Supernatant is outwelled, and remaining substance is transferred in the centrifuge tube of 10ml, is centrifuged in centrifuge, then with deionized water rinse from
Centrifuge tube is finally put into thermostatic drying chamber by the heart until by its thorough wash clean, and set temperature is 65 DEG C, dry 12h
The final product obtained afterwards is nano Ce O2, show flaxen powdered, XRD is as shown in Figure 1, its characteristic peak
Value does not have miscellaneous peak in 29 °, 34 °, 48 °, 57 ° in map, peak is narrow and long, illustrates that ceria crystallization is more complete；Its SEM figure
As indicated with 2, it can be seen that the nano Ce O prepared2Structure is relatively uniform consistent, and surface is smooth, and hollow spheres are presented.
Second step prepares V2O5/CeO2Nanocomposite:
It takes the ammonium metavanadate of 0.16g in the small beaker of 80ml, the deionized water stirring and dissolving of 30ml is then added, then
Directly by the CeO of 0.50g2It is added in solution, 12h is impregnated under the conditions of magnetic stirrer, then existed with Rotary Evaporators
Be evaporated cooling at 80 DEG C, then roast 4h at 300 DEG C with Muffle furnace, naturally cool to room temperature and obtain dark yellow powder, just for
V2O5/CeO2Nanocomposite, XRD is as shown in figure 3, be wherein V in 28.3 °, 32.8 °, 47.3 °, 56.1 °2O5/CeO2It receives
The peak value of nano composite material；According to document (Gu X, Jiazen Ge J, Zhang H, Aurox A, Shen J.
Structural, redox and acid e base properties of V2O5/CeO2 catalyst. [J]
Thermochim Acta, 2006,451:84-93) known to: 32.4 °, 33.1 ° are the V at 300 DEG C2O5And CeO2It reacts
The CeVO of generation4Peak value；The V of preparation2O5/CeO2The SEM of material schemes as shown in figure 4, V2O5It is attached to hollow spheres CeO2's
Surface, also some enter hollow ball gap.
Third step, V2O5/CeO2Application of the nanocomposite in degradation waste water containing cefalexin:
The initial concentration of cefalexin in waste water is adjusted in 40 mg/L, and adjusting pH respectively is 2,3,4,5,6,7, is taken
Then 20mL waste water is separately added into the V of 5mg in the conical flask of six 50ml again2O5/CeO2Nanocomposite, finally 50
Isothermal vibration 1h at DEG C.
4th step, the test of removal rate:
The 4.1 dry product 0.1000g for accurately weighing cefalexin (accurately to 0.0001g), weighed cefalexin are put
Enter beaker and be dissolved in deionized water, after all dissolutions, moves into and be settled in the volumetric flask of 1000 mL, as
The stock solution of 100mg/L, then based on this stock solution, by adjusting separately cefalexin concentration shown in table 1, and in wavelength
Absorbance is measured under 262 nm.
It is mapped with absorbance A to concentration C, and regression analysis is carried out to curve, as a result as shown in Figure 5.It can from Fig. 5
Out: the concentration C and absorbance A of cefalexin meet linear relationship in wider concentration range, and the relationship of the two is A=0.0174C
+ 0.0499, related coefficient R2=0.9876, the range for meeting the relational expression is that 0~120mg/L passes through A-C in the range
Relational expression the concentration of solution can be found out by the absorbance value measured.
4.2 degradation effects -- the calculating of cefalexin removal rate
4.2.1 in third step, after regulating waste strength and pH value, V is added2O5/CeO2Nanocomposite it
Before, absorbance is measured, as A0；
4.2.2 by after the completion of third step, absorbance is measured, as A1；
4.2.3 due to V2O5/CeO2Nanocomposite has color, therefore needs to remove background value, method particularly includes: with
The deionized water of equivalent replaces the waste water containing cefalexin in third step, then with third step (including pH under the same conditions
Value, V2O5/CeO2Dosage, the isothermal vibration temperature and time of nanocomposite) processing after, measure absorbance, as background
Value A2；
4.2.1-4.2.3 measurement of ultraviolet-visible spectrophotometer absorbance is utilized at 262 nm of wavelength.Finally press
Formula calculates the cefalexin removal rate under different pH.
。
As a result as shown in Figure 6, it will thus be seen that with the raising of pH value, removal rate is gradually increasing, and when pH is 3, is obtained
Maximum removal rate is 33.69%, and then removal rate is gradually lowered down again.Therefore conclusion can be obtained when pH is 3, it can reach
Highest removal rate, highest removal rate are 33.69%.
The influence of embodiment 2-- antibiotic initial concentration
The first step, second step are the same as embodiment 1.
Step 3: respectively adjust waste water in cefalexin initial concentration in 20,40,60,80,100,120 mg/L, and
Adjusting pH is 3, takes 20mL waste water in the conical flask of six 50ml, is then separately added into the V of 5mg again2O5/CeO2It is nano combined
Material, finally the isothermal vibration 2h at 50 DEG C.
4th step calculates the cefalexin removal rate under different antibiotic initial concentrations with embodiment 1.
As a result as shown in Figure 7, it will thus be seen that concentration rises to 40mg/L from 20mg/L, and removal rate is increased from 11.31%
To 30.80%, then concentration is increased to 120mg/L from 40mg/L, and removal rate is reduced to 7.23% from 30.80%, it is known that in concentration
Removal rate highest when for 40mg/L reaches 30% or so.
The influence of embodiment 3-- temperature
The first step, second step are the same as embodiment 1.
Step 3: adjust waste water in cefalexin initial concentration in 40 mg/L, and adjust pH be 3, take 20mL waste water in
In the conical flask of six 50ml, the V of 5mg is then added2O5/CeO2Nanocomposite, finally respectively 25,30,40,50,
60, isothermal vibration 2h at 70 DEG C.
4th step calculates the cefalexin removal rate under different temperatures with embodiment 1.
As a result as shown in Figure 8, it will thus be seen that when temperature is from room temperature to 50 DEG C, removal rate is gradually increased, with temperature
Increase removal rate to tend to be steady substantially, therefore therefore deduce that removal rate can reach best effect when temperature is 50 DEG C,
It can reach 55.61%.
Embodiment 4--V2O5/CeO2The influence of nanocomposite dosage
The first step, second step are the same as embodiment 1.
Step 3: adjust waste water in cefalexin initial concentration in 40 mg/L, and adjust pH be 3, take 20mL waste water in
In the conical flask of six 50ml, it is then separately added into the V of 5mg, 10mg, 15mg, 20mg, 25mg, 30mg again2O5/CeO2Nanometer is multiple
Condensation material, finally the isothermal vibration 2h at 50 DEG C.
4th step calculates different V with embodiment 12O5/CeO2Cefalexin removal under nanocomposite dosage
Rate.
As a result as shown in Figure 9, it will thus be seen that drug (i.e. V2O5/CeO2Nanocomposite) dosage from 5mg increase
When to 20mg, the removal rate approximate trend of antibiotic is gradually increased, change when from 20mg to 30mg it is basic relatively more steady,
It follows that 64.54% can reach to the removal rate of cefalexin when dosage is 20mg, therefore optimal drug
Dosage is 20mg.
The influence of embodiment 5-- concussion time
The first step, second step are the same as embodiment 1.
Step 3: adjust waste water in cefalexin initial concentration in 40 mg/L, and adjust pH be 3, take 20mL waste water in
In the conical flask of six 50ml, the V of 20mg is then added2O5/CeO2Nanocomposite finally distinguishes constant temperature at 50 DEG C
Shake 1h, 2h, 3h, 4h, 5h, 6h.
4th step calculates the cefalexin removal rate under the different concussion times with embodiment 1.
The results are shown in Figure 10, it will thus be seen that and the concussion time, apparent decline trend was presented in trend from 1h to 6h,
1-2h, curve slowly increase, and in 2-3h, curve drops suddenly, are gradually increasing again in 3-4h, then reduce again, wherein when earthquake
Between be 2h when, removal rate is up to 69.13%, thus can be obtained the optimal concussion time be 2h, most preferably shake when
Between under obtained highest removal rate be 69.13%.
Integrated embodiment 1-5's as a result, it is found that degradation optimum condition are as follows: adjust waste water in cefalexin initial concentration
In 40 mg/L, pH value of waste water 3, then 20 mg V are added in every 20mL waste water2O5/CeO2Nanocomposite, finally at 50 DEG C
Lower constant temperature oscillation 2h.At optimum conditions, cefalexin removal rate is between 64.54% ~ 69.13%.
Embodiment 6-- V2O5/CeO2Nanocomposite and simple nano Ce O2The Contrast on effect of degradation cefalexin
1 cefalexin stock solution of 20mL 100mg/L embodiment is drawn respectively in the conical flask of two 50ml, is then existed
Ceria prepared by 5mg embodiment 1 is added in one of conical flask, 5mg embodiment 1 is added in another conical flask and makes
Standby V2O5/CeO2Nanocomposite, finally the isothermal vibration 2h at 50 DEG C.
By 1 four-step method of embodiment, calculates separately and add ceria and V2O5/CeO2The cephalo of nanocomposite
Ammonia benzyl removal rate, as a result as shown in figure 11, the removal rate of available ceria are less than V2O5/CeO2Nanocomposite pair
The removal rate of cefalexin.
Claims (3)
1.V2O5/CeO2Application of the nanocomposite in degradation waste water containing cefalexin, it is characterised in that: the CeO2For in
It is empty spherical, the initial concentration of cefalexin in waste water is adjusted in 20 ~ 120 mg/L, pH value of waste water 2 ~ 7, then every 20mL waste water
5 ~ 30 mg V are added2O5/CeO2Nanocomposite, finally 1 ~ 6h of constant temperature oscillation at 25 ~ 70 DEG C.
2. application as described in claim 1, it is characterised in that: adjust the initial concentration of cefalexin in waste water 40 mg/L,
PH value of waste water is 3, and then 20 mg V are added in every 20mL waste water2O5/CeO2Nanocomposite, the finally constant temperature oscillation at 50 DEG C
2h。
3. application as claimed in claim 1 or 2, which is characterized in that V2O5/CeO2Nanocomposite prepares by the following method:
By ammonium metavanadate and nano Ce O2, after adding water and stirring dissolution, lasting stirring is lower to impregnate at least 12h, then it is evaporated cooling, then
At least 4h is roasted at 300 ~ 350 DEG C, cooled to room temperature obtains V2O5/CeO2Nanocomposite.
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| CN1068564C (en) * | 1996-08-02 | 2001-07-18 | 中国石油化工总公司 | Catalyst for treatment of waste water and its preparation method |
| AUPP436998A0 (en) * | 1998-06-26 | 1998-07-23 | Commonwealth Scientific And Industrial Research Organisation | A method and catalyst for treatment of waste water |
| US7695631B2 (en) * | 2005-06-22 | 2010-04-13 | Truox, Inc. | Composition and method for reducing chemical oxygen demand in water |
| CN100354041C (en) * | 2005-12-21 | 2007-12-12 | 中国科学院山西煤炭化学研究所 | Catalyst for treating benzene series organic waste-gas or waste-water by using low temp. and dry method, prepn. method and application thereof |
| CN101244385A (en) * | 2008-03-20 | 2008-08-20 | 同济大学 | A kind of preparation method of high-efficiency photocatalytic material |
| CN105923694B (en) * | 2016-06-07 | 2019-06-14 | 吉首大学 | A WO3/V2O5/FTO composite photoelectrode and its preparation and use method |
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