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Catalytic wet-type oxidation degradation method for estrogen contaminant

A technology that catalyzes wet oxidation and estrogen, which is applied in the field of estrogen pollutant treatment, can solve the problems that it is difficult to find estrogen microbial strains, high concentration of estrogen and intermediate products, and low concentration of wastewater, so as to achieve thorough removal, The effect of low processing cost and mild reaction conditions

Inactive Publication Date: 2009-10-21
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of biodegrading estrogen is better, but the concentration of treated wastewater is relatively small, and biological bacteria have certain selectivity. It is generally difficult to find a microbial strain that is effective for all estrogens. For those hormone production plants Wastewater with high concentrations of estrogen and intermediate products is difficult to treat directly with biodegradable methods
In addition, there are methods for degrading estrogen such as ozone oxidation, activated carbon adsorption, and ultraviolet light irradiation. These methods are not only costly, but also have poor effects.

Method used

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  • Catalytic wet-type oxidation degradation method for estrogen contaminant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Firstly, 5 mg / L 17β-estradiol solution was prepared by ultrasonic dissolution method at 40°C, and then 20ml of 17β-estradiol solution with a concentration of 5mg / L was put into a small autoclave, and then added to the system Catalyst, sealed, and finally filled with oxygen or air at a certain pressure, heated to a specified temperature while stirring, and reacted for 1 to 8 hours. The removal rate of 17β-estradiol after the reaction is shown in Table 1.

[0019] Table 1 Catalytic wet oxidation method to treat the result of 17β-estradiol solution

[0020]

[0021] 50mol% FeCl 3 /

[0022] In the table: mol% is the ratio of catalyst and estrogen, and the reaction temperature is the temperature of the oil bath outside the reactor.

Embodiment 2

[0024] According to the operation steps of above-mentioned embodiment 1, use FeCl 3 / NaNO 2 It is used as a catalyst to treat other estrogen wastewater (10mg / L or 5mg / L) at a reaction temperature of 150°C, a reaction oxygen partial pressure of 0.5MPa, and a reaction time of 4h. The results are shown in Table 2.

[0025] Table 2 Catalyzed wet oxidation process the result of other estrogen solutions

[0026]

[0027] In the table: mol% is the ratio of catalyst and estrogen, and the reaction temperature is the temperature of the oil bath outside the reactor.

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Abstract

The invention relates to a method for catalytic wet oxidation degradation of estrogen pollutants. The aqueous solution of estrogen pollutants with a mass concentration of 10-3-10 mg / L is put into a high-pressure reactor, a catalyst is added, and oxygen or air is used as an oxidant. Stir to remove estrogen pollutants; the reaction temperature is 90-180°C, the reaction pressure is 0.1-0.5MPa, of which the oxygen partial pressure is 0.1-0.5MPa, and the reaction time is 1-8h. The catalyst is composed of components A and B, A is a divalent or trivalent soluble iron salt, B is an alkali metal soluble nitrite; the ratio of the amounts of A and B is 0.01 to 1; the catalyst and the estrogen in the solution The amount ratio of estrogen to substance is 0.01-1. The method for treating estrogen wastewater has mild reaction conditions, low price, high degradation rate and no secondary pollution, is suitable for the degradation of estrogen pollutants with wide distribution and low concentration, and has great prospects for industrial application.

Description

technical field [0001] The invention relates to the treatment of estrogen pollutants, in particular to a method for catalytic wet oxidation degradation of estrogen pollutants. Background technique [0002] Environmental estrogen refers to a class of exogenous compounds that, after entering the body, interfere with the synthesis, release, operation, metabolism, and combination of substances normally secreted in the body, activate or inhibit the function of the endocrine system, thereby destroying it to maintain the stability of the body Sexual and regulatory substances. It interferes with many aspects of the human or animal endocrine system and causes abnormal effects. [0003] Environmental hormones are divided into natural estrogens, phytoestrogens and fungal estrogens, synthetic estrogens, and environmental chemical pollutants. [0004] The hazards of environmental estrogen mainly include: at extremely low concentrations, it can lead to a decrease in the secretion and ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J23/78
CPCY02W10/37
Inventor 梁鑫淼王联芝刘仁华徐青薛兴亚章飞芳
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI