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A method for the combined treatment of phenolic wastewater by precipitation-activated carbon adsorption

A technology of activated carbon adsorption and combined treatment, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of environmental pollution, low treatment efficiency, high treatment cost, etc., and achieve waste reuse Effect

Active Publication Date: 2021-09-24
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the above methods have high processing costs, and various chemical reagents added will cause new environmental pollution, and some methods have low processing efficiency

Method used

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  • A method for the combined treatment of phenolic wastewater by precipitation-activated carbon adsorption
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Experimental program
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Effect test

Embodiment 1

[0018] A method for the combined treatment of phenolic wastewater by precipitation-activated carbon adsorption, comprising the following steps:

[0019] 1. Use hydrochloric acid or sodium hydroxide to adjust the pH of phenolic wastewater to 6, add formaldehyde, and the ratio of formaldehyde to phenolic compounds is 1.1:1 (such as figure 2 Shown: Under the catalysis of ammonia water, phenolic compounds and COD in phenolic wastewater Cr The removal rate increases with the amount of formaldehyde. When the amount of formaldehyde added is 0.3g (that is, the ratio of formaldehyde to phenolic compounds is 1.1:1), the phenolic compounds and COD Cr The removal rate reaches a maximum. Continue to increase the amount of formaldehyde, formaldehyde will lead to COD Cr increase, thus COD Cr Removal rate decreased), stir evenly.

[0020] 2. Add ammonia water (35%), the amount of ammonia water (35%) added is 0.9 times the weight of formaldehyde, the catalytic reaction temperature is 25°C...

Embodiment 2

[0026] A method for the combined treatment of phenolic wastewater by precipitation-activated carbon adsorption, comprising the following steps:

[0027] 1. Use hydrochloric acid or sodium hydroxide to adjust the pH value of phenolic wastewater to 7, add formaldehyde, the ratio of formaldehyde to phenolic compounds is 1.05:1, stir evenly,

[0028] 2. Add ammonia water (35%), the amount of ammonia water (35%) is 1 times the weight of formaldehyde, the catalytic reaction temperature is 30°C, and the reaction time is 25 minutes.

[0029] 3. Centrifuge the precipitate, add acetone to internally ripen the precipitate, the amount of acetone used is 6 times of the weight of the precipitate, the aging time is 20h, centrifuge after the aging is completed, and the drying temperature is 130°C.

[0030] 4. The phenolic resin spheres are roasted under the protection of Ar to form nano-hollow carbon spheres. The calcination temperature is 600° C. and the calcination time is 11 hours. The phe...

Embodiment 3

[0034] A method for the combined treatment of phenolic wastewater by precipitation-activated carbon adsorption, comprising the following steps:

[0035] 1. Use hydrochloric acid or sodium hydroxide to adjust the pH value of phenolic wastewater to 7.5, add formaldehyde, the ratio of formaldehyde to phenolic compounds is 1.1:1, and stir evenly.

[0036] 2. Add ammonia water (35%), the amount of ammonia water (35%) added is 1.05 times the weight of formaldehyde, the catalytic reaction temperature is 35°C, and the reaction time is 20 minutes.

[0037] 3. The precipitate is separated by centrifugation, and acetone is added to internally mature the precipitate. The amount of acetone used is 7 times the weight of the precipitate, and the aging time is 20 hours. After the aging is completed, the centrifugal separation is carried out, and the drying temperature is 135°C.

[0038] 4. The phenolic resin spheres are roasted under the protection of Ar to form nano-hollow carbon spheres. Th...

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Abstract

The invention relates to a method for combined treatment of phenolic wastewater by precipitation-activated carbon adsorption. Formaldehyde and ammonia water are added to phenol-containing wastewater for catalytic reaction. Hollow spheres, and then the nano hollow spheres are roasted under the protection of inert gas to form nano hollow carbon spheres, and the filtrate is passed through the nano hollow carbon sphere adsorption column for adsorption treatment to further remove residual phenolic compounds and other organic substances in the wastewater. In the present invention, formaldehyde and ammonia water are firstly added to phenol-containing wastewater to react to generate nanoscale phenolic resin ball precipitates, and the primary removal rate of phenolic compounds is greater than 97%. It is used for advanced treatment of filtrate, which not only realizes waste reuse, but also makes phenolic compounds and COD in wastewater Cr Meet the national emission standards.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for jointly treating phenolic wastewater by precipitation and activated carbon adsorption. Background technique [0002] The chemical production process produces a large amount of phenolic wastewater, which is more harmful and causes increasingly serious environmental pollution. Phenolic compounds in natural water endanger the survival of aquatic organisms and plants, causing a large number of aquatic organisms such as fish to die and crops to wither and die. Phenol-containing wastewater is harmful to human health. Long-term drinking of phenol-contaminated water can lead to chronic poisoning, headache, dizziness, fatigue, insomnia, tinnitus, anemia, and neurological disorders. [0003] The treatment method group of phenolic wastewater should have physical method, chemical method and biochemical method. Physical methods mainly include adsorption, extraction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/34
CPCC02F1/283C02F1/5281C02F1/66C02F9/00C02F2101/345
Inventor 陈华军席晓晶杨刚宾李冬田文杰王锐
Owner LUOYANG INST OF SCI & TECH