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Catalytic oxidation treatment method of alkali reduction wastewater

A technology of alkali reduction wastewater and catalytic oxidation, which is applied in oxidation water/sewage treatment, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problem of high treatment cost, achieve high oxidation efficiency, improve utilization rate, remove good effect

Inactive Publication Date: 2018-01-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a catalytic oxidation treatment method for alkali reduction wastewater in order to overcome the defects of the prior art, such as the need to reciprocally adjust the pH value and high processing costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Put 100-mesh charcoal in 1mol / L nitric acid solution, soak it in a water bath at 60°C for 8 hours, wash it with distilled water until the pH value does not change, and dry it at 105°C;

[0033] 2. Weigh 4.96g of FeSO 4 ·7H 2 O was dissolved in 20 mL deionized water, and the FeSO 4 ·7H 2 After O is dissolved, add 80ml of absolute ethanol as a dispersant, add 5g of charcoal to the mixed solution, and use a magnetic stirrer to continue stirring for 1h to fully mix the charcoal with the solution.

[0034] 3. Under the protection of nitrogen, add 50ml KBH to the mixture at a rate of 1-2 drops per second at a constant speed 4 solution. After the dropwise addition was completed, the aging reaction was performed for 1 h, and then the charcoal-loaded nano-zero-valent iron was washed several times with deionized water and absolute ethanol under the protection of nitrogen, and finally dried in a vacuum oven to obtain a mass ratio of charcoal to iron of The 5:1 catalyst is ...

Embodiment 2

[0042] 1. Put 100-mesh charcoal in 2mol / L nitric acid solution, soak it in a water bath at 50°C for 8 hours, wash it with distilled water until the pH value does not change, and dry it at 105°C;

[0043] 2. Weigh 2.48g of FeSO 4 ·7H 2 O was dissolved in 20 mL deionized water, and the FeSO 4 ·7H 2 After O was dissolved, 80ml of absolute ethanol was added as a dispersant, 2.5g of charcoal was added to the mixed solution, and the magnetic stirrer was used to continuously stir for 2h to fully mix the charcoal with the solution.

[0044] 3. Under the protection of nitrogen, add 50ml KBH to the mixture at a rate of 1-2 drops per second at a constant speed 4 solution. After the dropwise addition was completed, the aging reaction was performed for 1 h, and then the charcoal-loaded nano-zero-valent iron was washed several times with deionized water and absolute ethanol under the protection of nitrogen, and finally dried in a vacuum oven to obtain a mass ratio of charcoal to iron of...

Embodiment 3

[0049] 1. Put 50-mesh charcoal in 1mol / L nitric acid solution, soak it in a water bath at 70°C for 6 hours, wash it with distilled water until the pH value does not change, and dry it at 105°C;

[0050] 2. Weigh 4.96g of FeSO 4 ·7H 2 O was dissolved in 20 mL deionized water, and the FeSO 4 ·7H 2 After O was dissolved, 80ml of absolute ethanol was added as a dispersant, 2.5g of charcoal was added to the mixed solution, and the magnetic stirrer was used to continuously stir for 2h to fully mix the charcoal with the solution.

[0051] 3. Under the protection of nitrogen, add 33ml KBH to the mixture drop by drop at a constant speed 4 solution. After the dropwise addition was completed, the aging reaction was performed for 1 h, and then the charcoal-loaded nano-zero-valent iron was washed several times with deionized water and absolute ethanol under the protection of nitrogen, and finally dried in a vacuum oven to obtain a mass ratio of charcoal to iron of The 2.5:1 catalyst s...

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Abstract

The invention discloses a catalytic oxidation treatment method of alkali reduction wastewater and an application thereof. The catalytic oxidation treatment method includes the following steps: at thetemperature of 50-70 DEG C, placing charcoal in nitric acid and soaking, and rinsing until the pH value is no longer changed; dissolving FeSO4.7H2O in deionized water, adding absolute ethyl alcohol toobtain a mixed solution, adding the charcoal to the mixed solution, and continuously stirring to make the charcoal and the solution fully mixed; under the protection of inert gas, dropping a KBH4 solution, after the completion of dropping, carrying out an aging reaction, carrying out washing and drying treatment, and preparing charcoal supported nanoscale zero-valent iron catalyst for standby application; putting the charcoal nanoscale zero-valent iron loaded catalyst into alkali reduction wastewater, then adding Na2S2O8, carrying out a reaction in a normal temperature condition, taking out the mixed solution after the reaction and determining the CODcr concentration. The method is a catalytic oxidation treatment method of the alkali reduction wastewater, wherein the method has the advantages of simple process, high oxidation efficiency and no secondary pollution.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and more specifically relates to a catalytic oxidation treatment method for alkali weight reduction wastewater. Background technique [0002] Alkali reduction is a production process adopted by printing and dyeing enterprises to improve the comfort and softness of polyester fabrics. By alkali treatment of polyester, the ester bonds in polyester are hydrolyzed to a certain extent in alkaline solution, so that The macromolecular chain is broken to a certain extent, and with the progress of hydrolysis, the morphology of the fiber surface also changes to a certain extent, so that the polyester fiber has the performance like real silk and achieves the effect of imitation silk. After the polyester fabric is processed by alkali reduction, the weight is reduced by about 20%. This part of the fiber is dissolved in water by generating sodium terephthalate and ethylene glycol under the action of NaOH. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/72B01J23/745C02F101/30
Inventor 林亲铁张晓峰罗昊昱姜洁如
Owner GUANGDONG UNIV OF TECH
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