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Method for removing low-concentration antibiotics in water through In-Co-contained MOFs adsorption and excitation persulphate synergism

A technology for activating persulfate and persulfate, applied in the field of environmental pollution control, can solve the problems of difficult treatment, low antibiotic concentration, large energy consumption, etc., and achieves the effect of simple process flow, broad application prospects, and improved activation efficiency.

Active Publication Date: 2017-09-08
HUNAN INSTITUTE OF ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing persulfate activation process, high temperature, UV and ultrasonic activation methods consume a lot of energy, and transition metal activation is difficult to recycle and causes secondary pollution.
On the other hand, the concentration of antibiotics in aqueous solution is relatively low and they have different sizes. Other persulfate activation methods are difficult to completely mineralize and degrade them, and there are still certain difficulties in subsequent treatment.

Method used

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  • Method for removing low-concentration antibiotics in water through In-Co-contained MOFs adsorption and excitation persulphate synergism
  • Method for removing low-concentration antibiotics in water through In-Co-contained MOFs adsorption and excitation persulphate synergism
  • Method for removing low-concentration antibiotics in water through In-Co-contained MOFs adsorption and excitation persulphate synergism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for synergistic removal of low-concentration antibiotics in water by adsorption of In-Co MOFs and activation of persulfate, the specific steps are as follows:

[0036] (1) Prepare 100 μmol / L sulfadiazine solution at room temperature, take 100ml of the solution in a 250ml reactor, add 0.05g of In-Co-containing MOFs, and stir for 1h;

[0037] (2) Add 0.1g K to the reaction system 2 S 2 o 8 Continue stirring for 2h;

[0038] (3) After the reaction is completed, the purpose of solid-liquid separation is achieved after simple filtration, and the In-Co-containing MOFs are collected and dried at 60°C for later use.

[0039] The adsorption capacity (indicated by the adsorption rate) of the stirred solution obtained in step (1) to In-Co MOFs was tested, and the final degradation rate was tested with the stirred solution obtained in step (2). The experimental results are shown in Table 1. , the results in Table 1 show that different ratios of In-Co-containing MOFs ha...

Embodiment 2

[0049] A method for synergistic removal of low-concentration antibiotics in water by adsorption of In-Co MOFs and activation of persulfate, the specific steps are as follows:

[0050] (1) Prepare a 100 μmol / L acetaminophen solution at room temperature, take 100ml of the solution in a 250ml reactor, add 0.05g of In-Co-containing MOFs, and stir for 1 hour;

[0051] (2) Add 0.1g K to the reaction system 2 S 2 o 8 Continue stirring for 2h;

[0052] (3) After the reaction is completed, the purpose of solid-liquid separation is achieved after simple filtration, and the In-Co-containing MOFs are collected and dried at 60°C for later use.

[0053] The adsorption capacity of In-Co MOFs (indicated by adsorption rate) was tested with the stirred solution obtained in step (1), and the final degradation rate was tested with the stirred solution obtained in step (2). The experimental results are shown in Table 2 , the results in Table 2 show that different proportions of In-Co-containin...

Embodiment 3

[0063] A method for synergistic removal of low-concentration antibiotics in water by adsorption of In-Co MOFs and activation of persulfate, the specific steps are as follows:

[0064] (1) Prepare a 100 μmol / L norfloxacin solution at room temperature, take 100ml of the solution in a 250ml reactor, add 0.05g of In-Co MOFs, and stir for 1h;

[0065] (2) Add 0.1g K to the reaction system 2 S 2 o 8 Continue stirring for 4h;

[0066] (3) After the reaction is completed, the purpose of solid-liquid separation is achieved after simple filtration, and the In-Co-containing MOFs are collected and dried at 60°C for later use.

[0067] The adsorption capacity (indicated by the adsorption rate) of the stirred solution obtained in step (1) to In-Co MOFs was tested, and the final degradation rate was tested with the stirred solution obtained in step (2). The experimental results are shown in Table 3 , the results in Table 3 show that the removal rate of norfloxacin with different proporti...

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Abstract

The invention discloses a method for removing low-concentration antibiotics in water through In-Co-contained MOFs adsorption and excitation persulphate synergism. The method comprises the steps that under the normal temperature, In-Co-contained MOFs and persulphate are added into wastewater containing antibiotics; on one hand, an inner cavity of the In-Co-contained MOFs can directly adsorb antibiotics in a water solution; on the other hand, dual-transition metal coordination sites in the In-Co-contained MOFs can remarkably improve the persulphate excitation efficiency to generate sulfate radical free radicals with the strong oxidizing property, the sulfate radical free radicals further oxidize the low-concentration antibiotics in the water solution to mineralize and degrade the antibiotics, and therefore the wastewater containing antibiotics is purified. The added In-Co-contained MOFs water solution is good in stability, easy to recycle and capable of repeatedly used. The method is low in cost, high in processing efficiency under the normal temperature and easy to implement, and has the great potential in the technical field of degradation-resistant antibiotics-contained wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control, and relates to the technology of using adsorption and deep oxidation technology to treat antibiotics in water, and specifically relates to the use of In-Co MOFs with large inner cavity size adsorption and double transition metal activated persulfate degradation to synergistically remove water bodies The approach to antibiotics in the environment. Background technique [0002] Environmental drugs such as antibiotics, as a new pollutant, have attracted the attention of many scientific researchers. A large number of environmental drugs such as antibiotics, antiepileptic drugs, analgesics, lipid-modulating drugs, β-blocker drugs, antihistamines and hormones have been detected in surface water and sewage treatment systems in many countries around the world. China is the world's largest producer and user of antibiotics, and our country is facing some serious problems when deali...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/28C02F103/34
CPCC02F1/285C02F1/725C02F2103/343
Inventor 阳海张帆胡乐天胡倩易兵
Owner HUNAN INSTITUTE OF ENGINEERING
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