Method for catalyzing H2O2 processing of phenol in waste water by Schwertmannite

A technology of H2O2 and phenol, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problems of difficult separation and reuse of catalysts, increased difficulty and cost, low reaction pH value, etc., to achieve The effect of rapid and thorough removal, easy management and control, simple and safe operation

Inactive Publication Date: 2013-03-06
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as a homogeneous catalysis, the Fenton method is difficult to separate and reuse the catalyst, and the pH value of the reaction is low, which will generate a large amount of iron-containing sludge, and the effluent contains a large amount of Fe. 2+ It will cause secondary pollution and increase the difficulty and cost of subsequent treatment

Method used

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  • Method for catalyzing H2O2 processing of phenol in waste water by Schwertmannite
  • Method for catalyzing H2O2 processing of phenol in waste water by Schwertmannite
  • Method for catalyzing H2O2 processing of phenol in waste water by Schwertmannite

Examples

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Embodiment example 1

[0027] Add 500mL distilled water into the round bottom flask, preheat it in 85℃ water bath, then weigh 2.6g Fe 2 (SO 4 ) 3 , added to preheated water, and stirred vigorously at constant temperature for 1 hour; then stopped stirring, cooled naturally, washed the solid three times with distilled water, and freeze-dried. The morphology of the obtained product is shown in Figure 1.

Embodiment example 2

[0029] Mix the Shi-type mineral and phenol solution into a 250mL Erlenmeyer flask, wherein the Shi-type mineral and phenol concentrations are 0.25g / L-2g / L and 100mg / L, and then add H 2 o 2 , so that the concentration is 100mg / L-2000mg / L, adjust the pH value to 2-7, and shake the reaction at 145rpm on a shaker. attached by figure 2 It is known that Shi-type minerals have similar catalytic efficiency at pH = 5 and pH = 3 and pH = 4 in a weakly acidic environment. After 5 hours of oxidation reaction, the removal rate of phenol can reach 100%. attached by image 3 know, when the pH is 5, H 2 o 2 When the concentration is 500mg / L, 1g / L Shi-type mineral has higher catalytic efficiency, which is slightly lower than 2g / L Shi-type mineral. After 5 hours of oxidation reaction, the removal rate of phenol can reach 100%. attached by Figure 4 It can be seen that when the pH is 5 and the concentration of Shi formula minerals is 1g / L, 500mg / L H 2 o 2 With 1000mg / L and 2000mg / L H 2 ...

Embodiment example 3

[0031]Take 0.15g of Shishi minerals and add them to a 250mL Erlenmeyer flask, then add 100mL of 0.1M sodium chloride solution, adjust the pH value to 5, and stabilize it for 2 hours; another appropriate amount of 1g / L phenol solution is mixed with 0-0.5M chlorine A total of 50 mL of sodium chloride solution, 0-0.5M sodium sulfate solution, and 0-0.5M sodium nitrate solution were mixed into another 250 mL conical flask, and the pH value was adjusted to 5, and then the solutions in the two conical flasks were mixed. The concentration of phenol in the solution is 100mg / L, after fine-tuning the pH value, quickly add H 2 o 2 , so that the concentration is 500mg / L, shake the reaction at 145rpm on a shaker. It can be seen from accompanying drawing 5 that chloride ions, sulfate ions and nitrate ions have no obvious influence on the oxidation process, so this process can be adapted to the oxidation treatment of phenol in a certain concentration or even high concentration saline indust...

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Abstract

The invention discloses a method for removing phenol in water and particularly discloses a technical method for catalyzing the oxidation reaction of H2O2 with phenol in the water by Schwertmannite. The method comprises the following step of preparing the Schwertmannite through synthesis by a ferric sulfate hydrolysis method. When the Schwertmannite is used for catalyzing the oxidation reaction of the H2O2 with the phenol, the removal rate of the phenol can reach more than 99%. The catalyst adopted in the invention can be cyclically used. After being repeatedly used for ten times, the catalyst can still have an effect of catalyzing the oxidation reaction of the H2O2 with 97% of phenol. The method has the advantages that the Schwertmannite is easy to synthesize and prepare, is at a low cost and can be cyclically used, and the technical method is easy to operate and manage, efficient and environment-friendly.

Description

technical field [0001] The invention relates to a method for removing phenol in water, in particular to Shi-type mineral catalyzed H 2 o 2 Process for oxidizing phenol in water. Background technique [0002] Phenol is a raw material and intermediate produced in industries such as papermaking, coking, oil refining, plastics, pesticides, and pharmaceutical synthesis. Phenol-containing wastewater mainly comes from industrial wastewater produced by coking plants, petrochemical plants, and plastic plants. Phenol has a significant corrosive effect on human tissues. When it contacts with the protein in the biological cell plasma, it can undergo a chemical reaction to make the cells lose their vitality. It is a kind of cell plasma poison. Therefore, phenol wastewater flowing into rivers will pollute the environment and endanger human health. [0003] At present, the traditional treatment technologies for phenol-containing wastewater include physical, chemical and biological meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/58
Inventor 韩煦王为民李喆
Owner TIANJIN POLYTECHNIC UNIV
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