Degradation process for environment estrogenic pollutant in water body

A technology for environmental estrogens and pollutants, which is applied in the field of degradation of environmental estrogenic pollutants, can solve the problems of complex operating conditions, difficult industrial promotion, and long degradation time, and achieves simple system, low operating cost, and cheap economical dosage. Effect

Inactive Publication Date: 2008-11-19
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former process is mild, but the degradation time is longer, and the degradation efficiency is related to the type of microorganisms or algae; the latter requires ultraviolet light or natural light as the external energy source, and can only function in the presence of high-efficiency catalysts
In addition, ozone and Fenton's reagent oxidation and activated carbon adsorption can also remove environmental estrogen in water, but there are disadvantages of high cost and complicated operating conditions, and it is difficult to promote it in a large scale.

Method used

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  • Degradation process for environment estrogenic pollutant in water body
  • Degradation process for environment estrogenic pollutant in water body
  • Degradation process for environment estrogenic pollutant in water body

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Take a 250mL flat-bottomed flask, add 0.05mol / L KMnO under nitrogen protection 4 Solution 50mL and 0.05mol / L NaOH solution 50mL, add 0.05mol / L MnCl dropwise under stirring 2 Solution 50mL, after the reaction is complete, let it stand for 30min, the precipitate generated by filtration is new ecological manganese dioxide, wash 5 times with twice distilled water to remove the ions on the surface of the precipitate, and finally store it in 100mL of double distilled water for later use. This colloidal solution A is mixed evenly, and a certain volume is taken for use.

Embodiment 2

[0025] Add the solution of Example 1A in 100 mL of estrone (Estrone, E1) contaminated aqueous solution with a concentration of 6 μmol / L, control the initial mass concentration of manganese dioxide to be 15 μmol / L, control the pH of the system to be 4.0~7.0, and the temperature to be 5~ The system solution was oscillated at 35°C with a rotation speed of 100-150 rpm. The estrogen content in the water before and after degradation was determined by GC-MS. The results are shown in Table 1.

[0026] Table 1: The results of degradation of estrone pollutants by new ecological manganese dioxide

[0027]

[0028] Example 2:

[0029] Add solution A to 100 mL of estradiol (17β-Estradiol, E2) contaminated aqueous solution with a concentration of 10 μmol / L, control the initial mass concentration of manganese dioxide to 25 μmol / L, control the pH value of the system to 4.0 to 7.0, and the temperature to 5 Mechanically agitate the system solution at ~35°C with a rotational speed of 100-150...

Embodiment 3

[0033] Add solution A to 100 mL of estriol (E3) contaminated aqueous solution with a concentration of 0.1 μmol / L, control the initial mass concentration of manganese dioxide to 0.25 μmol / L, control the pH value of the system to 4.0 to 7.0, and the temperature to 5 The system solution was oscillated at ~35°C with a rotational speed of 100-150rpm. The estrogen content in the water before and after degradation was measured by GC-MS. The results are shown in Table 3.

[0034] Table 3: The results of degradation of estriol pollutants by new ecological manganese dioxide

[0035]

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Abstract

The invention provides a method for degrading environmental estrogen pollutants in a water body. The method comprises the steps of adding nascent state hydration manganese dioxide colloid into water containing estrogen pollutants with a concentration of between 0.1 and 10 mu mol / l, controlling a concentration of the manganese dioxide in the system of between 0.25 and 25 mu mol / l, a PH value of between 4.0 and 7.0 and a temperature of between 5 and 35 DEG C and stirring or oscillating the system solution with a rotating speed of between 100 and 150 rmp to degrade the environmental estrogen pollutants in the water body. The method is low in treatment cost, free of the restriction of field conditions, high in degradation efficiency, uneasy to generate secondary pollution, applicable to the degradation and removal of environmental estrogen pollutants in various natural water bodies and man-made water bodies, possessing a good industrialization promotion prospect.

Description

(1) Technical field [0001] The invention relates to a method for degrading environmental estrogen pollutants in water bodies. (2) Background technology [0002] Environmental estrogens (Enviromental Estrogens, EEs) are a class of exogenous chemical substances that have estrogen activity, can mimic the physiological and biochemical effects of endogenous estrogen, or have the effect of antagonizing androgen. There are many kinds of environmental estrogens, which widely exist in various environments that humans can touch, and can enter animals and humans through food or biological chains. At present, the types of estrogens that have been discovered include: synthetic medicinal estrogens, phytoestrogens, fungal estrogens, pesticide estrogens, industrial chemical estrogens, and metal estrogens. In addition to phytoestrogens, which are environmental estrogens that are beneficial to human health, most other environmental estrogens can affect the development of the reproductive sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 邱宇平徐超徐雷庞辉盛光遥
Owner ZHEJIANG UNIV OF TECH
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