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Selective Photoelectrocatalytic Removal of Low-concentration 17β-estradiol in Coexisting Systems

A photoelectric catalysis and estradiol technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve high selectivity, good stability, and simple preparation

Active Publication Date: 2021-02-02
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 Removal of Low-concentration 17β-estradiol in Coexisting Systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A 17β-estradiol-selective photoanode comprising one-dimensional single-crystal TiO 2 Nanorod electrodes, and imprinted one-dimensional single-crystal TiO 2 The 17β-estradiol shape-selective catalytic site on the nanorod electrode surface was fabricated by the following steps:

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

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

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

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, and the electrode area was 9 cm 2 , the saturated calomel electrode is the reference electrode, and the platinum electrode is the counter electrode. A 17β-estradiol solution with a concentration of 1 mg / L was prepared with pure water, and the solutions contained 1 mg / L humic acid, 1 mg / L atrazine, 1 mg / L bisphenol A and other co-existing pollutants respectively. Photoelectrochemical oxidative degradation was carried out under UV irradiation and a bias voltage of 0.6 V. During the treatment, sodium sulfate electrolyte was added to make its concentration 0.1 mol / 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 9 μg / L. This shows that for low concentrations of 17β-estradiol in the water system, the photoelectric oxidation technology c...

Embodiment 3

[0032] The photoanode with the selective oxidation function of 17β-estradiol prepared in Example 1 was used as the working electrode, and the electrode area was 9cm 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 photoelectrochemistry of 1mg / L 17β-estradiol solution contained in COD=30mg / L sewage was carried out. Oxidative degradation. During the treatment, sodium sulfate electrolyte was added to make its concentration 0.1 mol / L. After being degraded for 10 hours, the removal rate of 17β-estradiol was 98.7%, and the concentration of E2 in the treated water was 13.7 μg / L, such as figure 1 shown. This example shows that for low-concentration 17β-estradiol in an actual complex water system with a COD of 30 mg / L, without pretreatment and separation, the photoelectric oxidation technology can directly achieve the purpose of preferentiall...

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Abstract

The invention relates to a selective photocatalytic removal method of low concentration 17β-estradiol in a coexistence system. Firstly, a photoelectric anode with shape-selective catalysis and selective oxidation of endocrine disruptor 17β-estradiol in wastewater is prepared, and then Under the conditions of irradiating and applying a certain potential bias voltage, the sewage containing low concentration of 17β-estradiol in the chemical oxygen demand COD of 10-100mg / L is treated. This method can realize the selective photoelectrochemical oxidation function and preferentially remove 17β-estradiol pollutants, the concentration of 17β-estradiol in the treated water can be lower than 15μg / L. Compared with the prior art, the present invention can effectively remove low-concentration 17β-estradiol in the actual complex water system without pretreatment and separation, and directly achieves the purpose of preferential oxidation of target pollutants and deep purification through photoelectric oxidation technology. The method is simple, the selectivity and catalytic efficiency are high, and the anti-interference ability is strong.

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 coexisting system. Background technique [0002] A wide variety of environmental estrogens exist widely in nature. Its properties are stable and not easily destroyed by degradation, with a long half-life, and it is enriched through the food chain in the ecological environment. The main way of affecting organisms is through contaminated food, air and water, which can still interfere with the normal regulatory network of humans, animals and plants in the trace range of ng / L-μg / L. Endogenous estrogens, also known as natural hormones, generally refer to estradiol, estrone and estriol, the latter two are metabolites of the former, and their active ratio is 100:3:1. Therefore, 17β-estradiol (abbreviated as E2) is one of the most potent and most biologically effective...

Claims

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Application Information

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Patent Type & Authority Patents(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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