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Method for removing tetracycline hydrochloride in water by catalytically activating sodium persulfate under visible light by using CeO2 composite BiOI material

A technology of tetracycline hydrochloride and sodium persulfate, applied in the environmental field, can solve problems such as high cost, poor efficiency, and difficult antibiotic degradation, and achieve the effects of high use efficiency, reduced energy cost, and short removal time

Inactive Publication Date: 2020-06-09
POWERCHINA CHENGDU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the commonly used method for removing antibiotics in the water environment at home and abroad is not only difficult to completely degrade the antibiotics, but also has poor efficiency and high cost. The method for removing tetracycline hydrochloride in water by sodium persulfate solves the problem of degrading antibiotics in water

Method used

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  • Method for removing tetracycline hydrochloride in water by catalytically activating sodium persulfate under visible light by using CeO2 composite BiOI material
  • Method for removing tetracycline hydrochloride in water by catalytically activating sodium persulfate under visible light by using CeO2 composite BiOI material
  • Method for removing tetracycline hydrochloride in water by catalytically activating sodium persulfate under visible light by using CeO2 composite BiOI material

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Experimental program
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Effect test

Embodiment 1

[0039] The present invention utilizes CeO Composite BiOI material Catalytic activation sodium persulfate removes the method for tetracycline hydrochloride in water under visible light, wherein the degradation process of tetracycline hydrochloride is as follows figure 1 As shown, the specific implementation includes the following steps:

[0040] (1) 0.3mmol of CeO 2 The nano powder was ultrasonically dispersed at a frequency of 20khz for 30min in ultrapure water with a volume of 40mL to form a uniform solution A; 3.0mmol of Bi(NO 3 )3·5H 2 O was uniformly magnetically stirred at 160r / min for 45min to dissolve in 30Ml of ethylene glycol solution to form a uniform solution B; 3.0mmol of KI was dissolved in 30mL of ultrapure water, and ultrasonicated at 20khz for 30min to form a uniform solution C;

[0041] (2) Solution B is added dropwise to solution A under magnetic stirring conditions to form mixed solution D, and solution D is magnetically stirred and mixed for a period of ...

Embodiment 2

[0052] The comparative test of using visible light to remove tetracycline hydrochloride in water is specifically completed according to the following steps:

[0053] 100 mL of tetracycline hydrochloride solution with a concentration of 100 mg / L was magnetically stirred at a speed of 150 r / min under visible light irradiation, and reacted for 30 min to obtain water from which residual antibiotics were removed;

[0054] In embodiment 2, the visible light adopts a xenon lamp light source, and uses a visible light filter to filter out other illuminations other than visible light, and the visible light power is 500W

[0055] In Example 2, the removal rate of antibiotics in pretreated water using sodium persulfate was 0%.

Embodiment 3

[0057] Use sodium persulfate to remove the comparative test of tetracycline hydrochloride in water, specifically complete according to the following steps:

[0058] Add 0.1 g of sodium persulfate to 100 mL of tetracycline hydrochloride solution with a concentration of 100 mg / L, and stir magnetically in the dark at a speed of 150 r / min, and react for 30 min to obtain water that removes residual antibiotics in the water;

[0059] In Example 3, sodium persulfate was used to remove antibiotics in pretreated water with a removal rate of 5%.

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Abstract

The invention discloses a method for removing tetracycline hydrochloride in water by catalytically activating sodium persulfate under visible light by using a CeO2 composite BiOI material. The methodcomprises the following steps: preparing a rare earth oxide CeO2 composite BiOI material; adding a certain amount of rare earth oxide CeO2 composite BiOI material into a tetracycline hydrochloride aqueous solution, uniformly mixing, and carrying out ultrasonic treatment at room temperature at the frequency of 20khz for 20-45min so that the nano powder of the rare earth oxide composite BiOI material is uniformly dispersed into the tetracycline hydrochloride aqueous solution; adding a certain mass of sodium persulfate into the mixed solution of the rare earth oxide CeO2 composite BiOI material and tetracycline hydrochloride, quickly and uniformly stirring with a glass rod, and carrying out a catalytic reaction under visible light illumination; the method is high in removal rate, short in removal time and simple in process operation, and degradation byproducts are non-toxic and harmless; meanwhile, the selected rare earth oxide is small in dosage, low in price and controllable in cost.

Description

technical field [0001] The invention relates to the field of environment, in particular to a method for catalytically activating sodium persulfate to remove tetracycline hydrochloride in water by using CeO2 composite BiOI material under visible light. Background technique [0002] With the acceleration of social industrialization, compounds with antibiotic effects are widely used in textiles, cleaning, pesticide emulsification and other fields as main components of detergents, lubricating oil additives, plasticizers, etc., while hospital wastewater, sewage treatment plants and factory sewage The random discharge of antibiotics, etc., has led to an increase in the environmental antibiotic content in natural water bodies year by year, posing a great threat to the safety of environmental water quality. [0003] At present, the commonly used methods for removing antibiotics in water environment at home and abroad include biological methods, physicochemical methods, electrochemic...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/72B01J27/08C02F101/34C02F101/38C02F101/36
CPCB01J27/08C02F1/30C02F1/725C02F2101/34C02F2101/36C02F2101/38
Inventor 刘畅伶张建
Owner POWERCHINA CHENGDU ENG
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