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A method for catalytic degradation of saccharin and neotame by metal organic framework nanomaterial bio-mof-11

A bio-mof-11, metal-organic framework technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, catalytic reactions, etc., can solve limited removal effects, threats to ecosystems and human health and other problems, to achieve the effect of short degradation time, high-efficiency express delivery and deep degradation

Active Publication Date: 2022-07-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Artificial sweeteners are detected in the water environment at trace concentrations, and their ecotoxicity, transformation in water treatment and toxicology research have become one of the hot issues, and their existence may pose a serious threat to ecosystems and human health
[0004] Saccharin and neotame are easily soluble in water and have strong thermal stability. Traditional water treatment processes such as coagulation, precipitation, filtration and disinfection have very limited removal effects

Method used

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  • A method for catalytic degradation of saccharin and neotame by metal organic framework nanomaterial bio-mof-11
  • A method for catalytic degradation of saccharin and neotame by metal organic framework nanomaterial bio-mof-11
  • A method for catalytic degradation of saccharin and neotame by metal organic framework nanomaterial bio-mof-11

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] 1) Preparation of bio-MOF-11

[0031] The bio-MOF-11 was prepared by hydrothermal reaction.

[0032] 2) Selection of persulfate

[0033] The persulfate selected in this example is sodium persulfate

[0034] 3) The specific degradation process is implemented according to the following steps

[0035] 1 g / L bio-MOF-11 was added to 50 mg / L saccharin and neotame solution and reacted for 60 min to establish adsorption-desorption equilibrium before adding sodium persulfate. Subsequently, 10 g / L sodium persulfate was added. The temperature was adjusted to 25 °C, and the stirring was performed for 120 min under the condition of 120 r / min.

[0036] After the samples were pretreated, the concentrations of saccharin and neotame in the system were determined by HPLC, and the degradation rates of saccharin and neotame were calculated. The results showed that the degradation rate of saccharin was 61%, and neotame was almost completely degraded.

example 2

[0038] 1) Preparation of bio-MOF-11

[0039] The bio-MOF-11 was prepared by hydrothermal reaction.

[0040] 2) The specific degradation process is implemented according to the following steps

[0041] 1 g / L bio-MOF-11 was added to the 50 mg / L saccharin and neotame solution, the temperature was adjusted to 25 °C, and the mixture was stirred for 120 min under the condition of 120 r / min.

[0042] After the samples were pretreated, the concentrations of saccharin and neotame in the system were determined by HPLC, and the removal efficiency of saccharin and neotame was calculated. The results showed that the adsorption of saccharin and neotame by bio-MOF-11 mainly occurred in the first 30 minutes and the last 30 minutes. , desorption occurred to reach equilibrium, and bio-MOF-11 had poor adsorption effect of saccharin and neotame.

example 3

[0044] 1) Selection of persulfate

[0045] The persulfate selected in this example is sodium persulfate

[0046] 2) The specific degradation process is implemented according to the following steps

[0047] Add 10g / L sodium persulfate to 50mg / L saccharin and neotame solution, adjust the temperature to 25°C, and stir for 120min under the condition of 120r / min.

[0048] 3) After the sample is pretreated, the concentration of saccharin and neotame in the system is determined by HPLC, so as to calculate the degradation rate of saccharin and neotame. The results show that only in the sodium persulfate system, saccharin and neotame are almost not degraded.

[0049] Case 4

[0050] 1) Preparation of bio-MOF-11

[0051] The bio-MOF-11 was prepared by hydrothermal reaction.

[0052] 2) Selection of persulfate

[0053] The persulfate selected in this example is sodium persulfate

[0054] 3) Treatment of bio-MOF-11 after use

[0055] The reaction solution was filtered, and the bio-...

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Abstract

The invention provides a method for catalyzing degradation of saccharin and neotame by metal-organic framework nanomaterial bio-MOF-11. It includes the following steps: S1, preparing bio-MOF-11; S2, preparing a degradation system; S3, adding bio-MOF-11 with a mass concentration of 1 g / L to the degradation system of S2 to form a mixture, and making the mixture establish adsorption-desorption Equilibrium; S4, adding persulfate with a mass concentration of 10 g / L to the mixture described in S3, the pH of the formed solution is 3-10, and the reaction temperature is maintained at 25°C for catalytic degradation. The metal-organic framework nanomaterial bio‑MOF‑11 catalyzes the degradation of saccharin and neotame, which is of great significance for the rapid degradation of persistent artificial sweeteners in the water environment and the improvement of biochemical properties of high-concentration wastewater.

Description

technical field [0001] The invention relates to the technical field of environmental engineering water treatment, in particular to a method for catalyzing degradation of saccharin and neotame by metal organic framework nanomaterial bio-MOF-11. [0002] technical background [0003] Saccharin and neotame are two common artificial sweeteners that are widely used in food, beverages, pharmaceuticals, and personal care to replace organic compounds from sucrose. Saccharin and neotame are hardly metabolized by the human body, and the degradation efficiency is not high during the biological treatment of sewage, and they are discharged into the water environment through sewage. Saccharin and neotame have been used for a long time and have a large scale of use, and their distribution in the water environment has the characteristics of wide pollution range, high pollution level and strong persistence, and is defined as a new type of pollutant. Artificial sweeteners are detected in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/00C02F1/66C02F1/02B01J31/22B01J37/10C02F101/30
CPCC02F1/00C02F1/66C02F1/02B01J31/1691B01J31/183B01J37/10C02F2101/30C02F2209/06C02F2209/02C02F2209/44B01J2531/845B01J2531/0213B01J2231/70Y02W10/37
Inventor 马晓雁朱丽丹邓靖李青松
Owner ZHEJIANG UNIV OF TECH
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