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Method for direct oxidative degradation of aniline organic pollutants in water

A technology for organic pollutants and oxidative degradation, which is applied in the field of oxidative degradation of aniline organic pollutants, can solve the problems of high selectivity of pollutants by biological methods, limited pollutant removal effect, and large influence of environmental factors, and achieves the oxidation of pollutants. The effect of high removal efficiency, convenient management and simple operation

Inactive Publication Date: 2020-02-25
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the invention is to solve the removal method of aniline organic pollutants in the current waste water. The biological method has a relatively large selectivity to the pollutants, is greatly affected by environmental factors and has a very limited removal effect of the pollutants. In the chemical method, ozone There are many limiting factors in the advanced oxidation process represented by Fenton and Fenton oxidation. The existing persulfate method based on sulfate radicals needs to pass external energy or environmental catalysts, and the cost is relatively high and causes environmental pollution. to solve the problem of secondary pollution, and provide a method for direct oxidation and degradation of aniline organic pollutants in water

Method used

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  • Method for direct oxidative degradation of aniline organic pollutants in water
  • Method for direct oxidative degradation of aniline organic pollutants in water
  • Method for direct oxidative degradation of aniline organic pollutants in water

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specific Embodiment approach 1

[0021] Specific embodiment one: a kind of method of direct oxidative degradation of aniline organic pollutants in water in this embodiment is completed according to the following steps:

[0022] First measure the pH value of the wastewater to be treated containing aniline organic pollutants and the molar concentration of aniline organic pollutants in the wastewater to be treated. If the pH is less than 5, the pH value needs to be adjusted to 5~10. If the pH is 5~ 10, there is no need to adjust the pH value; then add persulfate powder to the wastewater containing aniline organic pollutants to be treated, stir and react for 1.5h to 3h at a temperature of 20°C to 30°C, and complete the direct oxidation degradation Aniline organic pollutants in water; the molar equivalent ratio of the persulfate powder to aniline organic pollutants in the water to be treated is 50:3.

[0023] After fully stirring and mixing, the oxidation pretreatment of aniline organic pollutants in the wastewate...

specific Embodiment approach 2

[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the wastewater to be treated containing aniline organic pollutants contains aniline, p-chloroaniline, p-bromoaniline, benzidine, o-toluidine, p- One or more of nitroaniline, o-chloroaniline and m-chloroaniline.

[0029] The aniline organic pollutants have aniline and similar structures, such as an amino group linked to a benzene ring.

[0030] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0031] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the concentration of p-chloroaniline in the wastewater containing aniline organic pollutants to be treated is 0.3 mmol / L.

[0032] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for direct oxidative degradation of aniline organic pollutants in water, and relates to the technical field of wastewater treatment. The purpose of the invention is tosolve the problems of existing methods for removing aniline organic pollutants in wastewater, biological methods have the disadvantages of high selectivity on pollutants, great influence brought by environmental factors and very limited pollutant removal effect, advanced oxidation technologies, represented by ozone and Fenton oxidation, in chemical methods have many limiting factors, and an existing persulfate method based on sulfate radical free radicals has the disadvantages of needing external energy or an environmental catalyst, high cost and secondary pollution to the environment. The method of the invention comprises the following steps: regulating the pH value of to-be-treated wastewater containing aniline organic pollutants to 5-10, adding persulfate powder, and performing stirring to react in order to complete direct oxidative degradation of aniline organic pollutants in water. The method for direct oxidative degradation of the aniline organic pollutants in the water is achieved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for oxidatively degrading aniline organic pollutants. Background technique [0002] With the rapid development of industry, the composition of wastewater produced in human production and life tends to be complex. Among them, wastewater from printing and dyeing, pharmaceutical and chemical industries often contains a large amount of toxic and harmful substances. Among them, organic pollutants containing benzene rings have poor biodegradability. Traditional biochemical treatment mainly relies on the metabolic process of microorganisms, and the organic pollutants contained in this type of wastewater are difficult to be utilized by microorganisms, the direct treatment effect is poor, and the COD in water is difficult to meet the standard. As a result, trace amounts of organic chemicals are often detected in the effluent of WWTPs, with potential impacts on human...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/36C02F101/38
CPCC02F1/66C02F1/72C02F2101/36C02F2101/38
Inventor 金超王畔朱世殊孟凡刚
Owner SUN YAT SEN UNIV
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