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A kind of treatment method of phenol wastewater

A treatment method and wastewater technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of low mineralization degree, and meet the requirements of simple and easy method and reaction equipment Not high, the effect of mild reaction system

Active Publication Date: 2018-08-17
合肥沃雨环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, studies have found that CuO / PMS (persulfate) heterogeneously catalyzes the degradation of Rhodamine B (Rhodamine B) and phenol. The results show that the organic matter treatment effect is good, but the degree of mineralization is not high; activate persulfate with copper oxide Salt was used to treat p-chloroaniline, and it was found that the treatment effect was better than that of Cu 2+ / persulfate or persulfate system alone; use zero-valent iron (ZVI) and CuO to activate persulfate oxidation of Orange G (acid orange G), consider SO 4 -. and OH · The diradical system played an important role, however, there is no related report on the use of CuO / ZSM-5 to activate the persulfate system to improve the oxidative degradation of phenol

Method used

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  • A kind of treatment method of phenol wastewater
  • A kind of treatment method of phenol wastewater
  • A kind of treatment method of phenol wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation of CuO / ZSM-5 catalyst comprises the following steps:

[0033] (1) Adopt commercial ZSM-5 zeolite (silicon-aluminum ratio (SiO 2 / Al 2 o 3 )=18~30; relative crystallinity: Na type>85%; pore size: ), take 150mL of deionized water to dissolve 1.758g of copper nitrate (concentration is 0.0625mol / L), impregnate 5g of dried ZSM-5 powder with this solution, and stir in a constant temperature water bath at 60°C for 3h to make ZSM-5 Zeolite and copper nitrate are uniformly mixed to obtain a catalyst precursor;

[0034] (2) The obtained catalyst precursor was first dried at 120°C for 12h, washed and dried with deionized water, then roasted in a muffle furnace at 500°C for 4h, and ground into powder (the same particle size as the original ZSM-5 zeolite powder). CuO / ZSM-5 catalyst (m(Cu) / m(ZSM-5) 2 )=12%).

[0035] ZSM-5, CuO / ZSM-5 catalyst scanning electron microscope SEM picture and energy spectrometer EDS picture are shown in the accompanying drawings...

Embodiment 2- Embodiment 9

[0041] A kind of treatment method of phenol waste water is the same as embodiment 1, changes the concentration of phenol waste water, the add-on of CuO / ZSM-5 catalyst, the add-on of sodium persulfate, the amount of adding sodium hydroxide are different, specifically see table 1, other operations Same as Example 1, see Table 1 for phenol conversion rate and COD removal rate after treatment.

[0042] Table 1

[0043]

[0044] The preparation of the CuO / ZSM-5 catalyst used in embodiment 2-4 is specifically:

[0045] A kind of preparation of CuO / ZSM-5 catalyst comprises the following steps:

[0046] (1) Adopt commercial ZSM-5 zeolite (silicon-aluminum ratio (SiO 2 / Al 2 o 3 )=18~30; relative crystallinity: Na type>85%; pore size: ), take 150mL of deionized water to dissolve 1.624g of copper nitrate (concentration is 0.0577mol / L), impregnate 5g of dried ZSM-5 powder with this solution, and stir in a constant temperature water bath at 60°C for 5h to make ZSM-5 Zeolite and ...

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Abstract

The invention discloses a phenol wastewater treatment method and a preparation method of a CuO / ZSM-5 catalyst. Compared with the prior art, CuO is loaded on ZSM by an impregnation method to prepare a composite catalyst with good performance; persulfate is catalyzed to generate sulfate radicals to play stronger oxidizing ability; the treatment cost is reduced, the requirements on reaction equipment are not high, and the method is simple and easy to implement, has high operability and facilitates practical promotion and application; and moreover, the mineralization conversion of pollutants is thorough, the pollutants are converted into corresponding nontoxic substances, secondary pollution is avoided, the highest conversion rate of phenol can reach 99%, and the method has remarkable environmental advantages and economic advantages.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a method for treating phenol wastewater and a method for preparing a CuO / ZSM-5 catalyst. Background technique [0002] With the development of petroleum, chemical, printing and dyeing industries, the pollution of phenol wastewater has become increasingly prominent. Phenol and its derivatives have potential biological toxicity of carcinogenicity, teratogenicity, and mutagenesis. The benzene ring structure is stable and difficult to degrade. It is widely distributed in the environment and has caused serious damage to the water ecological environment. Included in the blacklist of priority pollutants. [0003] At present, the treatment methods of phenol wastewater mainly include: physical and chemical methods (adsorption, extraction, membrane separation, etc.), biological methods (activated sludge, enzyme treatment, immobilized microorganisms, etc.) and advanced oxida...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J29/46C02F101/34
CPCB01J29/46B01J2229/183C02F1/725C02F2101/345
Inventor 唐海李洋沙俊鹏
Owner 合肥沃雨环保科技有限公司
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