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Selective photoelectrocatalytic removing method of low-concentration 17 beta-estradiol in coexisting system

A photoelectric catalysis and estradiol technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve strong anti-interference ability, simple preparation, and good stability

Active Publication Date: 2017-09-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of the adsorbent material in this patent is relatively simple, and it also has a certain ability to remove organic matter 17β-estradiol in water, but there is still a lot of room for improvement in terms of selective removal ability

Method used

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  • Selective photoelectrocatalytic removing method of low-concentration 17 beta-estradiol in coexisting system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A 17β-estradiol-selective photoanode including 1D single-crystal TiO 2 Nanorod electrodes, and imprinted on 1D single crystal TiO 2 17β-estradiol shape-selective catalytic sites on the surface of nanorod electrodes, fabricated by the following steps:

[0026] (1) Weigh concentrated hydrochloric acid and mix it with water, then add tetrabutyl titanate dropwise, stir at 450rpm for 1h, add template molecule 17β-estradiol, concentrated hydrochloric acid, water, tetrabutyl titanate and 17β-estradiol The volume ratio of the amount of alcohol added is 7.5:7.5:0.35:0.05, the concentration of concentrated hydrochloric acid is 37wt%, and the precursor solution is obtained;

[0027] (2) Transfer the precursor solution to a sealed reaction kettle, immerse the conductive side of the pretreated FTO in the solution, and react at 150°C for 4 hours;

[0028] (3) After the reaction is completed, take out the product, rinse it with deionized water, take out the surface residue, and calc...

Embodiment 2

[0030] One-dimensional single crystal TiO with 17β-estradiol shape-selective sites prepared in Example 1 2 The nanorod electrode was used as the working electrode with an electrode area of ​​9 cm 2 , a saturated calomel electrode was used as the reference electrode, and a platinum electrode was used as the counter electrode. Prepare a 1mg / L 17β-estradiol solution with pure water, and the solution contains 1mg / L humic acid, 1mg / L atrazine, 1mg / L bisphenol A and other coexisting pollutants. The photoelectrochemical oxidation degradation was carried out under the irradiation of ultraviolet light and the bias voltage of 0.6V. Sodium sulfate electrolyte was added during the treatment to make the concentration 0.1mol / L. After 10 hours of degradation, the removal rate of 17β-estradiol was 99.1%, and the concentration of E2 in the treated water was measured to be 9 μg / L. This shows that for the low concentration of 17β-estradiol in the water system, the photoelectric oxidation tech...

Embodiment 3

[0032] The photoanode with the selective oxidation function of 17β-estradiol prepared in Example 1 is used as the working electrode, and the electrode area is 9 cm 2, the saturated calomel electrode is the reference electrode, and the platinum electrode is the counter electrode. Under the irradiation of ultraviolet light and the bias voltage of 0.6V, the 1mg / L 17β-estradiol solution contained in COD=30mg / L sewage is subjected to photoelectrochemical Oxidative degradation. Sodium sulfate electrolyte was added during the treatment to make the concentration 0.1mol / L. After 10 hours of degradation, the removal rate of 17β-estradiol was 98.7%, and the concentration of E2 in the treated water was measured to be 13.7 μg / L, as figure 1 shown. This implementation example shows that for low-concentration 17β-estradiol in an actual complex water system with a COD of 30mg / L, no pretreatment and separation are required, and the purpose of preferential oxidation and deep purification of E...

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Abstract

The invention relates to a selective photoelectrocatalytic removing method of low-concentration 17 beta-estradiol in a coexisting system. The method comprises the following steps of preparing a photoanode for shape-selective catalytic oxidation of endocrine disrupter 17 beta-estradiol in waste water; and under the conditions of light irradiation and bias voltage to which a certain level is applied, treating low-concentration 17 beta-estradiol in the waste water with chemical oxygen demand (COD) of 10 to 100mg / L. A selective photo-electrochemical oxidation function can be realized by the method, the 17 beta-estradiol pollutant is removed preferably, and concentration of the 17 beta-estradiol in the treated water can be smaller than 15 mu g / L. Compared with the prior art, the method has the advantages that the low-concentration 17 beta-estradiol in an actual complex water system can be effectively removed, the aims of preferably oxidizing a target pollutant and deep purification can be fulfilled through photoelectric oxidation technology without pre-treatment and separation, and the method is simple, high in electivity and catalytic efficiency, strong in capacity of resisting disturbance, and the like.

Description

technical field [0001] The invention relates to the technical field of environmental estrogen degradation, in particular to a selective photoelectric catalytic removal method for low-concentration 17β-estradiol in a coexistence system. Background technique [0002] There are many kinds of environmental estrogens, which widely exist in nature. It is stable in nature, not easy to be degraded and destroyed, has a long half-life, and is enriched through the food chain in the ecological environment. The main way to affect organisms is through polluted food, air and water bodies. In the trace range of ng / L-μg / L, it can still interfere with the normal regulatory network of humans, animals and plants. Endogenous estrogen, also known as natural hormone, generally refers to estradiol, estrone and estriol, the latter two are the metabolites of the former, and their activity ratio is 100:3:1. Therefore, 17β-estradiol (abbreviated as E2) is an endocrine disruptor with the strongest act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/461B01J21/06C02F101/34
CPCB01J21/063C02F1/32C02F1/46109C02F1/4672C02F2001/46133C02F2101/34C02F2201/46135C02F2201/4618C02F2305/10
Inventor 赵国华朱颖婕张亚男
Owner TONGJI UNIV
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