Method for removing antibiotics in water body by activating peroxydisulfate without catalyst under visible light

A peroxodisulfate and antibiotic technology, applied in the field of antibiotics, can solve the problems of metal ion residues and high energy consumption, and achieve the effects of low cost, low energy consumption, and reduced consumption

Pending Publication Date: 2020-11-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: currently

Method used

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  • Method for removing antibiotics in water body by activating peroxydisulfate without catalyst under visible light
  • Method for removing antibiotics in water body by activating peroxydisulfate without catalyst under visible light
  • Method for removing antibiotics in water body by activating peroxydisulfate without catalyst under visible light

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Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: separate PS is to four kinds of sulfonamide antibiotic removal efficiency

[0025] First, add 50 mL of sulfonamide antibiotics to a double-layer beaker at a concentration of 10 mg / L, and adjust the initial pH of the system to 7 with 0.1 mM sulfuric acid solution and 0.1 mM sodium hydroxide solution. Then, the stock solution of potassium peroxodisulfate prepared in advance was added to the reaction system, and the reaction was carried out at 25° C., and the initial concentration of potassium peroxodisulfate in the reaction system was 4 mM. The mass ratio of antibiotics to PS is 1:108. Take samples at intervals and make a degradation curve of antibiotics, such as figure 1 As shown in (a), the results show that potassium peroxodisulfate alone has a certain removal effect on sulfa antibiotics and is completed in a short period of time, and the removal rate remains unchanged over time. The removal rates of potassium peroxodisulfate alone for sulfonamide, sulf...

Embodiment 2

[0026] Embodiment 2: Visible light / PS system is to four kinds of sulfonamide antibiotics removal efficiency

[0027] First, add 50 mL of sulfonamide antibiotics to a double-layer beaker at a concentration of 10 mg / L, and adjust the initial pH of the system to 7 with 0.1 mM sulfuric acid solution and 0.1 mM sodium hydroxide solution. Then add potassium peroxodisulfate stock solution prepared in advance to the reaction system and turn on the xenon lamp light source at the same time, the reaction is carried out at 25°C, the initial concentration of potassium peroxodisulfate in the reaction system is 4mM, and the mass ratio of antibiotics to PS is 1:108. Take samples at intervals and make degradation curves of antibiotics, such as figure 1 As shown in (b), the results show that compared with the removal of sulfonamide antibiotics by potassium peroxodisulfate alone, the visible light / PS composite system can continuously degrade sulfa antibiotics, and the removal rate increases wit...

Embodiment 3

[0028] Embodiment 3: the influence of PS concentration on the removal effect of sulfonamide

[0029] First, 50 mL of sulfonamide solution was added to the double-layer beaker with a concentration of 10 mg / L, and the initial pH of the system was adjusted to 7 with 0.1 mM sulfuric acid solution and 0.1 mM sodium hydroxide solution. Then add the pre-prepared potassium peroxodisulfate stock solution to the reaction system and turn on the xenon lamp light source at the same time. The reaction is carried out at 25°C. 4mM, 5mM, the mass ratios of antibiotics and PS are 1:0, 1:27, 1:54, 1:81, 1:108, 1:135, respectively. Take samples at intervals and detect the concentration of sulfa in the system at different times, such as figure 2 As shown in (a), the results show that after 60 min of visible light irradiation, the removal rates of sulfonamide by this system are 0%, 22%, 37%, 48%, 54%, and 62%, respectively.

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Abstract

The invention belongs to the technical field of sewage treatment and recycling, and relates to a method for removing antibiotics in a water body by activating peroxydisulfate without a catalyst undervisible light. The method comprises the following specific operation steps: adding PS into the water body containing the antibiotics, and activating the PS under the irradiation of the visible light to generate free radicals to remove the antibiotics, wherein the mass ratio of the antibiotics to the PS is 1: (27-135), the antibiotics are sulfonamide antibiotics, and the PS refers to a salt capableof providing peroxydisulfate ions and mainly comprises one or a mixture of more of potassium peroxydisulfate, sodium peroxydisulfate and ammonium peroxydisulfate. The method does not need additionalenergy consumption, needs a simple reaction device, is low in cost, simple in process flow and easy to operate, and thus has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and resource utilization, and relates to a method for removing antibiotics in water by activating peroxodisulfate under visible light without catalyst. Background technique [0002] Based on the sulfate radical (SO 4 - The advanced oxidation technology of ) is a new type of sewage treatment technology with high efficiency and environmental friendliness, which has attracted the attention of many researchers. Compared with the traditional hydroxyl radical (·OH)-based degradation process, this SO 4 - • The driven degradation process has many advantages. which includes SO 4 - Has an even higher redox potential (2.5-3.1V) close to OH (2.8V), has a longer half-life (>4s) than OH (below 1μs), and under certain circumstances SO 4 - · Higher selectivity. So SO 4 - · Can exhibit similar or even better ability to degrade emerging organic pollutants. It is precisely because the advance...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/72C02F101/34C02F101/38
CPCC02F1/30C02F1/722C02F2101/34C02F2101/38C02F2101/40C02F2305/02C02F2305/023
Inventor 赵志伟邓小永陈瑞耿聪
Owner CHONGQING UNIV
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