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Application of V2O5/CeO2 composite nano-material in degradation of cefalexin-containing wastewater

A technology of nano-composite material and cephalexin, which is applied in the field of antibiotic treatment, can solve the problems of great harm, body absorption, environmental pollution, etc., and achieves the effect of fast efficiency and good effect.

Inactive Publication Date: 2017-01-11
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Antibiotics currently in use include penicillins, cephalosporins, lactamase inhibitors, aminoglycosides, amides, macrolides, tetracyclines, sulfonamides, quinolones, furans, and nitroimidazoles, among which Tetracyclines have withdrawn from the market due to their relatively high hazards, while cephalosporins are used to treat various diseases, but they cannot be completely absorbed by the body when used in large quantities, and the discharged wastes cause great pollution to the environment. Therefore, it is necessary to Find out a simple, quick and effective way to deal with antibiotics

Method used

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  • Application of V2O5/CeO2 composite nano-material in degradation of cefalexin-containing wastewater
  • Application of V2O5/CeO2 composite nano-material in degradation of cefalexin-containing wastewater
  • Application of V2O5/CeO2 composite nano-material in degradation of cefalexin-containing wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1--the influence of pH value

[0025] The first step is to prepare nano-CeO 2 :

[0026] First, weigh 0.585g of Ce (NO 3 ) 3 ·6H 2 O into a large beaker, then weigh 2.25g of potassium bromate and pour it into a large beaker, add 100ml of deionized water and stir to dissolve on a magnetic stirrer, weigh 0.60g of L-asparagine after dissolution and add it to a large beaker and let it fully dissolve until the solution is clear, then pour it into a polytetrafluoroethylene reaction kettle, put the reaction kettle into an oven, set the temperature at 140°C, take it out after 24 hours of reaction and cool it to room temperature, and put the supernatant Pour off the liquid, transfer the remaining material to a 10ml centrifuge tube, centrifuge in a centrifuge, then rinse the centrifuge with deionized water until it is thoroughly washed, and finally put the centrifuge tube into a constant temperature drying oven, set Set the temperature at 65°C, and the final produ...

Embodiment 2

[0042] Embodiment 2--Influence of antibiotic initial concentration

[0043] The first step, second step are with embodiment 1.

[0044] The third step: adjust the initial concentration of cephalexin in the waste water at 20, 40, 60, 80, 100, 120 mg / L respectively, and adjust the pH to be 3, get 20mL waste water in six 50ml Erlenmeyer flasks, and then Add 5 mg of V 2 o 5 / CeO 2 The nanocomposite material was finally shaken at a constant temperature of 50°C for 2h.

[0045] In the fourth step, the same as in Example 1, calculate the removal rate of cephalexin under different initial concentrations of antibiotics.

[0046] The result is as Figure 7 As shown, it can be seen that the concentration increases from 20mg / L to 40mg / L, and its removal rate increases from 11.31% to 30.80%, and then the concentration increases from 40mg / L to 120mg / L, and its removal rate decreases from 30.80% It can be seen that the removal rate is the highest when the concentration is 40mg / L, which...

Embodiment 3

[0047] Embodiment 3--the influence of temperature

[0048] The first step, second step are with embodiment 1.

[0049] The third step: adjust the initial concentration of cephalexin in the wastewater to 40 mg / L, and adjust the pH to 3, take 20mL of wastewater in six 50ml Erlenmeyer flasks, and then add 5mg of V 2 o 5 / CeO 2 The nanocomposite material was shaken at constant temperature for 2 hours at 25, 30, 40, 50, 60, and 70°C, respectively.

[0050] The 4th step, with embodiment 1, calculate the cephalexin removal rate under different temperature.

[0051] The result is as Figure 8 As shown, it can be seen that when the temperature is from room temperature to 50°C, the removal rate gradually increases, and the removal rate basically tends to be stable as the temperature increases, so it can be concluded that when the temperature is 50°C, the removal rate can reach The best effect can reach up to 55.61%.

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Abstract

The invention belongs to the technical field of treatment of antibiotics and particularly discloses an application of a V2O5 / CeO2 composite nano-material in degradation of cefalexin-containing wastewater. The application comprises the steps of adjusting the initial concentration of cefalexin in the wastewater to 20mg / L to 120mg / L, adjusting the pH value of the wastewater to 2 to 7, then, adding 5mg to 30mg of the V2O5 / CeO2 composite nano-material into per 20mL of wastewater, and finally, carrying out isothermal oscillation for 1 to 6 hours at the temperature of 25 DEG C to 70 DEG C. The V2O5 / CeO2 composite nano-material has an obvious oxidative catalysis action on cefalexin antibiotic, the degradation effect is optimal under the conditions that the concentration of the wastewater is 40mg / L, the pH of the wastewater is 3, the dosage is 20mg, the temperature is 50 DEG C, and the oscillation time is 2 hours, and the removal efficiency can reach 64.54% to 69.13%. Under the optimal degradation conditions of the V2O5 / CeO2 composite nano-material, the V2O5 / CeO2 composite nano-material has better effect and higher efficiency to the degradation of the cefalexin antibiotic compared with pure nano-CeO2.

Description

technical field [0001] The invention belongs to the technical field of antibiotic treatment, in particular to V 2 o 5 / CeO 2 Application of nanocomposites in the degradation of cephalexin-containing wastewater. Background technique [0002] China is a country that uses a lot of antibiotics in the world, but due to the lack of more accurate discharge data on antibiotics for many years, the real use of antibiotics in China is still unknown. Recently, according to a survey conducted by the Chinese Academy of Sciences on the use of antibiotics in various places, about 50,000 tons of antibiotic-containing waste was discharged into the soil and water environment in China in 2013, which is far higher than that in developed countries such as Europe, America and Japan. . Due to the extensive use of antibiotics, it has caused potential harm to human health and the environment, especially to the growth and development of children. For children, injecting antibiotics into the body ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/66C02F103/34
CPCC02F1/66C02F1/725C02F2103/343C02F2305/08
Inventor 李春光崔节虎郑宾国刘倩王香平周浩李珂张珂何艳红
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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