A method for efficiently degrading bisphenol compounds by using UV-LED combined with sodium perborate

Abstract

The application discloses a method for efficiently degrading bisphenol compounds by using UV-LED combined with sodium perborate, and relates to the technical field of water treatment. The method adds sodium perborate into a bisphenol compound solution to be treated, and irradiates the water body by using UV-LED, so that the bisphenol compounds can be efficiently removed. The application utilizes the activated sodium perborate to efficiently degrade bisphenol compounds, and has the advantages of simple operation, low cost, excellent performance and high application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to a method for efficiently degrading bisphenol compounds by using UV-LED combined with sodium perborate. BACKGROUND

[0002] Endocrine disruptors, namely environmental hormones, are exogenous chemical substances that affect the normal hormone levels in human and animal bodies. The pollution of endocrine disruptors is global, and it has been confirmed that the pollution is related to human reproductive disorders, developmental abnormalities and some cancers. Bisphenol compounds belong to one kind of endocrine disruptors, and are commonly used in the plastic industry. The toxic effects of bisphenol compounds include endocrine disrupting effects, neurotoxins, immunotoxins and the like, which seriously threaten human health.

[0003] Due to the complex structure, bisphenol compounds are difficult to be completely removed by general sewage treatment technologies. At present, the treatment method for bisphenol compounds is mainly catalytic oxidation degradation, and ordinary catalytic oxidation has the problems of low removal efficiency and long reaction time. SUMMARY

[0004] The present application aims at solving the above problems in the prior art, and provides a method for efficiently degrading bisphenol compounds by using UV-LED combined with sodium perborate, which is more convenient to operate, has lower energy consumption, and can effectively improve the efficiency of treating bisphenol compounds.

[0005] To achieve the above object, the present application adopts the following technical scheme:

[0006] The method for efficiently degrading bisphenol compounds by using UV-LED combined with sodium perborate comprises the following steps: adding sodium perborate into water containing bisphenol compounds to be degraded, and irradiating the water by using UV-LED, so as to realize efficient degradation of the bisphenol compounds.

[0007] In the water of the present application, the concentration of sodium perborate is not higher than 2.0 mM.

[0008] Preferably, the concentration of sodium perborate is 1.0-2.0 mM.

[0009] In the present application, the wavelength of UV-LED is not higher than 300 nm.

[0010] In the water containing bisphenol compounds to be degraded, the concentration of bisphenol compounds is 0.1-10 μM.

[0011] In the water of the present application, the pH is 5.0-9.0.

[0012] In the present application, the reaction time is not more than 20 min, and preferably, the reaction time is 15 min.

[0013] Compared with the prior art, the technical scheme of the present application has the beneficial effects of:

[0014] The present application first combines sodium peroxoborate with UV-LED to remove bisphenol compounds in water; this method can efficiently remove bisphenol compounds; the chemical reagent used in this method is easy to obtain and has low cost, the equipment used is simple and has low energy consumption; the operation method is simple, has high application value, and is easy to popularize. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Figure for comparison of bisphenol A degradation effects under different systems.

[0016] Figure 2 Figure for effect of sodium peroxoborate concentration on degradation of bisphenol A by UV-LED and sodium peroxoborate combined system.

[0017] Figure 3 Figure for effect of pH on degradation of bisphenol A by UV-LED and sodium peroxoborate combined system.

[0018] Figure 4 Figure for effect of different common ions on degradation of bisphenol A by UV-LED and sodium peroxoborate combined system.

[0019] Figure 5 Figure for effect of different UV-LED wavelengths on degradation of bisphenol A by UV-LED and sodium peroxoborate combined system.

[0020] Figure 6 Figure for degradation effect of UV-LED and sodium peroxoborate combined system on different bisphenol compounds. DETAILED DESCRIPTION

[0021] In order to make the technical problems to be solved by the present application, the technical scheme and the beneficial effects more clear and explicit, the present application is further described in detail below in combination with the drawings and examples.

[0022] Example 1

[0023] The concentration of bisphenol A in the water sample to be treated was 1 μmol / L.

[0024] This example was carried out according to the following method: sodium peroxoborate (1 mmol / L) was added to the above water sample to be treated, and mixed uniformly; a 275 nm UV-LED was fixed above the water surface and turned on; under the action of a magnetic stirrer, the reaction was stirred for 15 min; samples were taken at 0, 1, 3, 5, 7, 10 and 15 min to measure the residual concentration of bisphenol A. Figure 1 As shown in the figure, the removal rate of bisphenol A reached 85% after 15 min of reaction.

[0025] Reference Figure 1This invention verifies the removal effect of different systems on bisphenol A. Water samples were treated with UV-LED, sodium perborate, and UV-LED + sodium perborate systems, respectively. The results show that only the UV-LED + sodium perborate system can rapidly degrade bisphenol A.

[0026] Example 2

[0027] This example tests the effect of sodium perborate concentration on the removal efficiency of bisphenol A. See [link to relevant documentation]. Figure 2 The results showed that when the sodium perborate concentration was 1.5–2.0 mmol / L, the degradation effect was excellent within 15 min. If it is necessary to shorten the reaction time, the sodium perborate concentration can be further increased.

[0028] Example 3

[0029] pH has a certain influence on this type of reaction, therefore, various pH conditions are simulated, see [reference needed]. Figure 3 The results showed that within the pH range of 5.0 to 9.0, changes in pH had little impact on the removal efficiency, indicating that the system was minimally affected by the pH of the water body and was suitable for real-world wastewater treatment.

[0030] Example 4

[0031] This invention verifies whether the system can be applied to wastewater containing certain common ions to simulate Cl. - SO4 2- and NO3 - For the effects of ions, see [link / reference]. Figure 4 The results showed that these three types of ions had no significant inhibitory effect on the system.

[0032] Example 5

[0033] This embodiment tests the effect of UV-LED wavelength on the removal efficiency of bisphenol A. See [link to documentation]. Figure 5 The results showed that, under the same experimental conditions, the shorter the wavelength of UV-LED, the better the bisphenol A removal effect, with the optimal wavelength being 265–275 nm.

[0034] Example 6

[0035] This invention verifies whether the system can be universally applied to bisphenol compounds. The removal effect of the system on common bisphenol compounds bisphenol S, bisphenol F, bisphenol AF, bisphenol B, and bisphenol C was tested. See [link to relevant documentation]. Figure 6 The results showed that the system is applicable to all of the above-mentioned bisphenol compounds.

Claims

1. A method for efficiently degrading bisphenol compounds using UV-LED combined with sodium perborate, characterized in that: Sodium perborate with a concentration not exceeding 2.0 mM is added to water containing bisphenol compounds to be degraded at a pH of 5.0 to 9.0, and the water is irradiated with UV-LEDs with a wavelength not exceeding 300 nm to achieve efficient degradation of bisphenol compounds.

2. The method for efficiently degrading bisphenol compounds using UV-LED combined with sodium perborate as described in claim 1, characterized in that: The concentration of sodium perborate is 1.0 ~ 2.0 mM.

3. The method for efficiently degrading bisphenol compounds using UV-LED combined with sodium perborate as described in claim 1, characterized in that: The concentration of bisphenols in the water containing the bisphenol compounds to be degraded is 0.1 ~ 10 μM.

4. The method for efficiently degrading bisphenol compounds using UV-LED combined with sodium perborate as described in claim 1, characterized in that: The reaction time should not exceed 20 minutes.

5. The method for efficiently degrading bisphenol compounds using UV-LED combined with sodium perborate as described in claim 1, characterized in that: The reaction time is 15 min.

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