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Iodine drug degradation method based on MOF template method

A template method and iodine technology, applied in chemical instruments and methods, water pollutants, iron compounds, etc., can solve the problems of low degradation efficiency of organic matter, and achieve the effects of easy recycling, avoiding secondary pollution, and efficient degradation

Active Publication Date: 2019-09-24
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and provides a method for the degradation of iodized drugs based on the MOF template method. Based on the MOF template method, copper-iron composite oxides are prepared to activate sulfite to generate sulfate radicals. Realize the efficient degradation of iodine drugs under neutral conditions, which solves the problem of low degradation efficiency of organic matter under neutral conditions in the above-mentioned background technology

Method used

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  • Iodine drug degradation method based on MOF template method
  • Iodine drug degradation method based on MOF template method
  • Iodine drug degradation method based on MOF template method

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Effect test

Embodiment 1

[0021] The method for degradation of iodinated drugs based on the MOF template method of this embodiment includes the following steps:

[0022] (1) Dissolve 0.241g of copper nitrate trihydrate, 0.353g of iron acetylacetonate and 0.332g of terephthalic acid in a mixed solution of N,N-dimethylformamide and ethanol (50mL, v:v=1), Mix and dissolve thoroughly to obtain a precursor solution;

[0023] Put the precursor solution into the hydrothermal kettle, control the reaction temperature to 120°C, and react for 12 hours;

[0024] After the reaction, it is cooled to room temperature, washed and dried to obtain the copper / iron bimetallic organic framework material MOFs, which are constructed from copper and iron bimetallic ions and rigid organic ligands;

[0025] (2) The copper / iron bimetallic organic framework is cleaned with ethanol, dried, placed in a muffle furnace, heated to 500°C at a rate of 1°C / min, and calcined for 1 hour to obtain a copper-iron composite oxide; The copper-iron com...

Embodiment 2

[0029] Steps (1) and (2) of this embodiment are the same as those of embodiment 1, with the difference:

[0030] (3) Add the obtained copper-iron composite oxide (0.08g / L) to the water to be treated with iohexol (2mg / L) as the iodinated drug, and adjust the pH to 5, 6, 7, 8 respectively , 9, and then add 0.450mM sodium sulfite, stir the reaction with a stirrer at room temperature, take a water sample to determine the remaining iohexol concentration after 30 minutes of reaction, and draw the removal effect curve of iohexol under different pH values ​​( figure 2 );

[0031] Such as figure 2 , The ordinate represents the ratio of the remaining amount of iohexol to the initial amount. The pH value of 5-9 can achieve the degradation effect of iodinated drugs, especially when the pH value is 7-9, after 30 minutes of reaction, the iodine in the water to be treated The remaining concentration of sea alcohol is only about 1% of the initial concentration, indicating that the copper-iron co...

Embodiment 3

[0033] Steps (1) and (2) of this embodiment are the same as those of embodiment 1, with the difference:

[0034] (3) Add the obtained copper-iron composite oxide (0.08g / L) to the water to be treated with iohexol (2mg / L) as the iodinated drug, adjust the pH to 7, and then add 0.450mM sodium sulfite , Stir the reaction with a stirrer at room temperature, set different sampling time points (0, 1, 3, 5, 10, 15, 20, 30 min), take a water sample to determine the remaining concentration of iohexol;

[0035] (4) After the reaction, the copper-iron composite oxide was taken out, washed with deionized water, and then poured into a new water body to be treated containing iohexol (iohexol concentration: 2mg / L; pH: 7; sodium sulfite: 0.450mM), the reaction was stirred, and the residual concentration of iohexol was determined at different sampling time points. According to this method, the copper-iron composite oxide was reused 5 times, and the removal effect curve was drawn ( image 3 );

[003...

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Abstract

The invention discloses an iodine drug degradation method based on an MOF template method, and particularly relates to a method for preparing a copper-iron composite oxide to activate sulfite to generate sulfate free radicals to degrade iodine drugs in water on the basis of the MOF template method. According to the method, an MOF material can serve as a self-sacrificial template, the copper-iron composite oxide is prepared after calcination, the characteristics of high specific surface area and high catalytic activity of the copper-iron composite oxide are used for activating the sulfite to generate the sulfate free radicals to degrade the iodine drugs. The copper-iron composite oxide prepared on the basis of the MOF template method is easy to recycle, and still has a good activation effect after being recycled multiple times. The method is suitable for degradation of various iodine drugs, is high in activation efficiency and simple and feasible to operate, can efficiently activate the sulfite to degrade the iodine drugs under neutral conditions, and is relatively good in advantage.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a method for degradation of iodinated drugs based on the MOF template method. Background technique [0002] Trace drug contaminants are frequently detected in water bodies around the world, and iodinated drugs are an important class of drugs. Iodine drugs are difficult to remove in conventional sewage treatment, resulting in higher detection concentrations in surface waters. Iodine drugs are important precursors for the generation of iodine disinfection by-products. Studies have shown that the formation of iodotrihalomethane is positively correlated with the content of iodine drugs. [0003] At present, the conventional oxidants (ozone, hypochlorous acid, monochloramine) in the water treatment process have low reactivity with iodinated drugs, and it is difficult to achieve the degradation of iodinated drugs. However, advanced oxidation methods can generate highly rea...

Claims

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Application Information

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IPC IPC(8): C02F1/72C01G49/00C02F101/36
CPCC02F1/72C01G49/0018C02F2101/36
Inventor 赵晓丹荆国华周作明武文敬
Owner HUAQIAO UNIVERSITY
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