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Catalyst for degrading phenol in water as well as preparation method and application thereof

A technology of catalyst and phenol, which is applied in the field of catalyst for degrading phenol in water and its preparation, to achieve the effects of easy recovery, improved decomposition rate and wide application prospects

Inactive Publication Date: 2018-09-21
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently applying for a patent is a method for removing heavy metals by intercalating layered clay and Schwittmannite with triazine derivatives (CN103657587 A) and a magnetic chemical absorbent containing Schwittmannite, its manufacturing method, regeneration method and waste liquid treatment method (CN103657587 A) CN101505865 A), but using Fe 3 o 4 / Research on the photocatalytic degradation of phenol in water with Schwittmannite catalyst has not been reported

Method used

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  • Catalyst for degrading phenol in water as well as preparation method and application thereof
  • Catalyst for degrading phenol in water as well as preparation method and application thereof
  • Catalyst for degrading phenol in water as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Fe 3 o 4 / Schwittmann stone catalyst preparation:

[0030] Add pH = 2.0 diluted H to the Erlenmeyer flask 2 SO 4 solution and 1.0g Fe 3 o 4 Stir evenly, keep the total volume of the reaction system at 500mL, place on a 180r / min reciprocating shaker at 28°C, and shake for 2 hours; then add 11.12g FeSO 4 ·7H 2 O and 6mL H 2 o 2 (concentration is 1.11g / mL); put the mixed solution on a reciprocating shaker at 180r / min at 28°, and shake and cultivate for 24 hours; 2 SO 4 The aqueous solution was washed 3 times, and then washed 3 times with ultrapure water; the samples were preserved after vacuum freeze-drying. From figure 1 It can be seen that the catalyst is magnetic and is easily attracted by a magnet. figure 2 It can be seen that Fe 3 o 4 / Schwittmannite Catalyst in the presence of Fe 3 o 4 , good crystallinity. From image 3 See, Fe 3 o 4 / Schwittmannite catalyst elements include Fe, S and O. The chemical composition of Schwittmannite is Fe 8 o ...

Embodiment 2

[0032] Diluted H at pH = 1.5 was added to the Erlenmeyer flask 2 SO 4 pure aqueous solution and 0.5g Fe 3 o 4 Stir evenly, keep the total volume of the reaction system at 500mL, place on a 200r / min reciprocating shaker at 30°C, and shake for 1 hour; then add 22.2g FeSO 4 ·7H 2 O and 10mL H 2 o 2 (concentration is 1.11g / mL); place the mixed solution on a reciprocating shaker at 200r / min at 30°C, and culture it with shaking for 25 hours; 2 SO 4 The aqueous solution was washed 3 times, and then washed 3 times with ultrapure water; the samples were preserved after vacuum freeze-drying. From figure 1 It can be seen that the catalyst is magnetic and is easily attracted by a magnet. figure 2 It can be seen that Fe 3 o 4 / Schwittmannite Catalyst in the presence of Fe 3 o 4 , good crystallinity. From image 3 See, Fe 3 o 4 / Schwittmannite catalyst elements include Fe, S and O. The chemical composition of Schwittmannite is Fe 8 o 8 (OH) 8-2x (SO 4 ) x, where 1≤x...

Embodiment 3

[0034] Diluted H at pH = 2.5 was added to the Erlenmeyer flask 2 SO 4 Pure aqueous solution and 1.5g Fe 3 o 4 Stir evenly, keep the total volume of the reaction system at 500mL, place on a 250r / min reciprocating shaker at 32°C, and shake for 0.5 hours; then add 26.5g FeSO 4 ·7H 2 O and 23.9 mL H 2 o 2 (concentration is 1.11g / mL); place the mixed solution on a reciprocating shaker at 250r / min at 32°C, and culture it with shaking for 20 hours; 2 SO 4 The aqueous solution was washed 3 times, and then washed 3 times with ultrapure water; the samples were preserved after vacuum freeze-drying. from figure 1 It can be seen that the catalyst is magnetic and is easily attracted by a magnet. figure 2 It can be seen that Fe 3 o 4 / Schwittmannite Catalyst in the presence of Fe 3 o 4 , good crystallinity. from image 3 See, Fe 3 o 4 / Schwittmannite catalyst elements include Fe, S and O. The chemical composition of Schwittmannite is Fe 8 o 8 (OH) 8-2x (SO 4 ) x , wh...

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Abstract

The invention discloses a catalyst for degrading phenol in water as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a novel catalyst Fe3O4 / Schwertmannite; and (2) treating phenol by virtue of the novel catalyst. By adopting the method of the invention, phenol in the water can be effectively degraded; the novel catalyst is used in the method, and more .OH can be generated, so that the decomposition rate of organic matters can be significantly increased, and phenol can be rapidly degraded under the acidic and neutral conditions. In addition, the Fe3O4 / Schwertmannite catalyst has magnetism and is easy to recover after the degradation reaction is ended, no environmental pollution is produced, and no additional manpower and material resource is needed for the subsequent treatment; and the used oxidant is low in price, the degradation period is short, and the application prospect for degrading phenol in the waste wateris wide.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a catalyst for degrading phenol in water, a preparation method and application thereof. Background technique [0002] Phenol is a common organic chemical basic raw material, widely used in various chemical industries. Once the phenol content in the living water environment of aquatic organisms exceeds 10mg / L, they cannot survive; and once the phenol content in agricultural irrigation water exceeds 100mg / L, the crops will be reduced or even dead. At present, there are many methods for treating phenolic wastewater in industry, and the commonly used methods include biochemical method, adsorption method, extraction method, liquid membrane separation method, chemical oxidation method and so on. The extraction method is the main method for recovering phenolic substances from high concentration phenolic wastewater. However, when the phenol concentration is high, a consi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/32C02F1/72C02F101/34
CPCC02F1/32C02F1/722C02F1/725B01J23/745C02F2101/345B01J35/33
Inventor 周立祥李婷
Owner NANJING AGRICULTURAL UNIVERSITY
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