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A kind of heterogeneous fenton-like catalyst and preparation method thereof and application in degrading phenol-containing wastewater

A technology for catalyst and phenol wastewater, which is applied in the application field of heterogeneous Fenton-like catalyst and its preparation and degradation of phenol-containing wastewater, can solve the problems of high cost of other treatment methods, unbearable for enterprises, poisoning, etc., and achieves increased overflow , Improve the removal rate, the effect of large specific surface area

Inactive Publication Date: 2018-08-10
BENGBU COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The rapid development of industrial production has caused many refractory organic substances to be discharged into natural water bodies. Among these refractory organic substances, phenol and its derivatives have a great toxic effect on humans and other organisms. For the treatment of phenol-containing wastewater, At present, the method adopted by many enterprises is that biochemical treatment is difficult to achieve the desired effect, while other treatment methods (such as extraction, adsorption, etc.) are costly and difficult for enterprises to bear.

Method used

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  • A kind of heterogeneous fenton-like catalyst and preparation method thereof and application in degrading phenol-containing wastewater
  • A kind of heterogeneous fenton-like catalyst and preparation method thereof and application in degrading phenol-containing wastewater
  • A kind of heterogeneous fenton-like catalyst and preparation method thereof and application in degrading phenol-containing wastewater

Examples

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Embodiment 1

[0031] A preparation method for a heterogeneous Fenton-like catalyst, comprising the following steps:

[0032] (1) Dissolving and hydrolyzing the solid sodium tetrachloroaluminate with excess ethanol aqueous solution, filtering out insoluble sodium chloride, and obtaining filtrate A;

[0033] (2) Filtrate A is filtered by a ceramic membrane with a pore size of 50 nm, further purified, and impurities such as potassium, sodium, and zinc are removed, and the liquid B is obtained.

[0034] (3) Add deionized water to liquid B first, and then add ammonia water, so that the ratio of substances is: n(Al):n(H 2 O): n(OH -)=1:90:0.6, hydrolyzed at 20°C for 3 hours to obtain liquid C; liquid C is a clear and transparent high-quality pseudo-boehmite sol. During the catalyst preparation process, after the sol is made, let the newly formed sol stand for a period of time for aging. The aging time is 2 hours, and the pH is controlled at about 7 during aging. Aging is conducive to the format...

Embodiment 2

[0042] A kind of preparation method of heterogeneous Fenton catalyst, is characterized in that: comprise the following steps:

[0043] (1) Dissolving and hydrolyzing the solid sodium tetrachloroaluminate with excess ethanol aqueous solution, filtering out insoluble sodium chloride, and obtaining filtrate A;

[0044] (2) Filtrate A is filtered by a ceramic membrane with a pore size of 100nm to obtain liquid B;

[0045] (3) Add deionized water to liquid B first, then add ammonia water, so that the ratio of substances is: n(Al):n(H2O):n(OH - )=1:105:0.9, hydrolyze at 90°C for 4 hours to obtain liquid C, preferably let the newly formed liquid C stand for a period of time for aging.

[0046] (4) Add urea to liquid C and stir for 1.3 hours, then heat liquid C to 750°C, cool to room temperature, add saturated ferrous sulfate aqueous solution to liquid C, and stir for 30 minutes to obtain a coating slurry;

[0047] (5) Immerse the cordierite honeycomb ceramic carrier in the coating ...

Embodiment 3

[0052] A kind of preparation method of heterogeneous Fenton catalyst, is characterized in that: comprise the following steps:

[0053] (1) Dissolving and hydrolyzing the solid sodium tetrachloroaluminate with excess ethanol aqueous solution, filtering out insoluble sodium chloride, and obtaining filtrate A;

[0054] (2) Filtrate A is filtered by a ceramic membrane with a pore size of 85nm to obtain liquid B;

[0055] (3) Add deionized water to liquid B first, then add ammonia water, so that the ratio of substances is: n(Al):n(H2O):n(OH - )=1:100:0.8, hydrolyzed at 50°C for 3.5h to obtain liquid C;

[0056] (4) Add urea to liquid C and stir for 2 hours, then heat liquid C to 900°C, cool to room temperature, add saturated ferrous sulfate aqueous solution to liquid C, and stir for 20 minutes to obtain a coating slurry;

[0057] (5) Immerse the cordierite honeycomb ceramic carrier in the coating slurry for 3 minutes for surface coating, and after taking it out, blow out the excess...

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Abstract

The invention discloses a heterogeneous Fenton catalyst, a preparation method thereof and application of the heterogeneous Fenton catalyst to degradation of phenolic wastewater. The preparation method includes the steps of dissolving sodium tetrachloroaluminate with ethanol water; filtering to obtain filtrate B, adding deionized water and ammonium hydroxide into the filtrate B, and hydrolyzing to obtain liquid C; adding urea and a saturated ferrous sulfate water solution into the liquid C so as to obtain coating slurry; immersing cordierite monolith ceramics carriers into the coating slurry for surface coating, adding the cordierite monolith ceramics carriers subjected to surface coating into a mixed water solution of FeSO4 7H2O, Ce(NO3)3 6H2O and cyanuric acid to obtain thick liquid, subjecting the thick liquid to solid-liquid separation to obtain a solid D, and roasting prior to rapid cooling so as to obtain the heterogeneous Fenton catalyst applied to degradation of the phenolic wastewater. The preparation method has the advantage that a catalyst preparation method is changed to stop active ingredients from loss so as to make the catalyst high in catalytic activity, stable in catalytic performance and recyclable.

Description

technical field [0001] The invention relates to the technical field of environmental protection and chemical treatment, in particular to a heterogeneous Fenton-like catalyst, a preparation method thereof and an application in degrading phenol-containing wastewater. Background technique [0002] The rapid development of industrial production has caused many refractory organic substances to be discharged into natural water bodies. Among these refractory organic substances, phenol and its derivatives have a great toxic effect on humans and other organisms. For the treatment of phenol-containing wastewater, At present, the method adopted by many enterprises is that biochemical treatment is difficult to achieve the desired effect, and other treatment methods (such as extraction, adsorption, etc.) are costly and difficult for enterprises to bear. Wet Catalytic Oxidation (CWAO) is to oxidize and degrade the biodegradable organic matter dissolved or suspended in water under the acti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83C02F1/72C02F101/34
CPCB01J23/83C02F1/722C02F2101/34C02F2305/026
Inventor 赵建军吴景梅邰燕芳
Owner BENGBU COLLEGE
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