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Ferric alginate-sodium citrate gel material as well as preparation method and application thereof

A technology of sodium citrate and gel materials, applied in chemical instruments and methods, water/sludge/sewage treatment, organic compounds/hydrides/coordination complex catalysts, etc. The speed current utilization rate and the treatment effect are not ideal, and the preparation method is simple, the reaction activity is enhanced, and the catalytic effect is high.

Pending Publication Date: 2021-11-30
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For organic wastewater that is difficult to degrade like phenol wastewater, electrochemical methods can usually be used for treatment. Although the electrochemical method is simple to treat wastewater and easy to manage, the surface-to-body ratio of the electrolytic cell, the speed of material movement, and the use of current The rate and processing effect are not ideal, which limits its application

Method used

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  • Ferric alginate-sodium citrate gel material as well as preparation method and application thereof
  • Ferric alginate-sodium citrate gel material as well as preparation method and application thereof
  • Ferric alginate-sodium citrate gel material as well as preparation method and application thereof

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preparation example Construction

[0028] The invention provides a kind of preparation method of alginate iron salt-sodium citrate gel material, and the method comprises the following steps:

[0029] 1) Preparation of sodium alginate aqueous solution, FeSO 4 ·7H 2 A mixed aqueous solution of O and sodium citrate;

[0030] 2) Add sodium alginate solution dropwise to FeSO 4 ·7H 2 In the mixed aqueous solution of O and sodium citrate, leave standstill to react afterwards;

[0031] 3) After the reaction is finished, post-treatment is carried out to obtain the iron alginate-sodium citrate gel material.

[0032] In step 1), in the sodium alginate aqueous solution, the mass concentration of sodium alginate is 1-1.3g / 100ml. FeSO 4 ·7H 2 In the mixed aqueous solution of O and sodium citrate, the molar concentration of sodium citrate is 0.1-0.2mmol / L, FeSO 4 ·7H 2 The molar concentration of O is 0.1-0.15mol / L.

[0033] In step 2), FeSO 4 ·7H 2 The mass ratio of O to sodium alginate is (2.7-3.5):1. Use a need...

Embodiment 1

[0038] 1) Preparation of gel material

[0039] Weigh 1g of sodium alginate and dissolve it in 100ml of deionized water to obtain an aqueous solution of sodium alginate; 4 ·7H 2 O was added to 100ml of water, and 0.01mmol sodium citrate was added to obtain a mixed aqueous solution; the above two solutions were mixed with a needle dropwise, and then left to stand at a temperature of 32°C for 24 hours , the obtained product was washed with water and ethanol, and dried under vacuum at 40° C. for 4 hours to obtain a gel material. Depend on figure 1 It can be seen that the prepared gel material is spherical.

[0040] 2) Application of gel material

[0041] The gel material obtained in step 1) was added to 5mL of phenol waste water in an amount of 12g / l, wherein the phenol concentration was 20mg / L, and the hydrogen peroxide concentration was 2mM. A sample was taken every 30min, and another sample was taken after 60min. Sent to high performance liquid chromatography analysis.

...

Embodiment 2

[0044] 1) Preparation of gel material

[0045] Weigh 1.2g sodium alginate and dissolve in 100ml deionized water to obtain sodium alginate aqueous solution; 0.013molFeSO 4 ·7H 2 O was added to 100ml of water, and 0.01mmol sodium citrate was added to obtain a mixed aqueous solution; the above two solutions were mixed with a needle dropwise, and then left to stand at a temperature of 32°C for 24 hours , the obtained product was washed with water and ethanol, and dried in vacuum at 40° C. for 6 hours to obtain a gel material.

[0046] 2) Application of gel material

[0047] Add the gel material obtained in step 1) into 5mL of phenol waste water in an amount of 12g / l, wherein the phenol concentration is 20mg / L, and the hydrogen peroxide concentration is 3mM. A sample is taken every 30min, and a sample is taken again after 60min. Sent to high performance liquid chromatography analysis.

[0048] Depend on figure 2 It can be seen that under the catalysis of the gel material in t...

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Abstract

The invention relates to a ferric alginate-sodium citrate gel material as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) preparing a sodium alginate aqueous solution and a mixed aqueous solution of FeSO4.7H2O and sodium citrate; 2) dropwise adding a sodium alginate aqueous solution into a mixed aqueous solution of FeSO4.7H2O and sodium citrate, and then conducting standing for reaction; and 3) after the reaction is finished, carrying out post-treatment to obtain the ferric alginate-sodium citrate gel material. During application, the gel material and hydrogen peroxide are added into phenol wastewater to degrade phenol. Compared with the prior art, the ferric alginate-sodium citrate gel material prepared by the invention has an efficient catalytic effect in phenol wastewater treatment, and the gel material is spherical, is easy to separate from pollutants, and can be recycled; and compared with a noble metal catalyst, raw materials such as sodium citrate are cheap and easy to obtain, and the preparation method is simple.

Description

technical field [0001] The invention belongs to the technical field of phenol wastewater treatment, and relates to an iron alginate-sodium citrate gel material and a preparation method and application thereof. Background technique [0002] With the development of the petrochemical industry, the problem of phenol wastewater pollution has become increasingly prominent. Phenol is widely used in industrial production, but it is also a common organic pollutant emitted in human daily production activities. It has a strong aromatic smell, is flammable and toxic, and has been identified as a strong carcinogen. It is inhaled through the contact of the skin and mucous membranes or immersed in the organism through the oral cavity. After contacting with the protein in the intracellular plasma, it forms insoluble protein and deactivates the cells. It has a greater affinity for the nervous system, causing neurological lesions. . Phenol-containing wastewater is very harmful to humans. Th...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/08C02F1/72C02F101/34
CPCB01J31/2239C02F1/722C02F1/725C02F2101/345B01J2531/842B01J35/23B01J35/51
Inventor 卢德力杨琦东韩生陈哲赵玉壮王玉蒙陈亚莉穆晓银孙彬任飞鹤卢义麟李腾飞田盼盼
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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