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Ag2O/Bi2WO6 compound as well as preparation method and application thereof

A compound, 3·5H2O technology, applied in the field of environmental pollution remediation, can solve the problems of unsatisfactory removal effect, endangering human health and sustainable development, and achieve the effect of simple facilities and easy operation

Pending Publication Date: 2021-07-02
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the resulting large amount of antibiotic wastewater is not ideally removed by traditional treatment methods, which seriously endangers human health and sustainable development.

Method used

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  • Ag2O/Bi2WO6 compound as well as preparation method and application thereof
  • Ag2O/Bi2WO6 compound as well as preparation method and application thereof
  • Ag2O/Bi2WO6 compound as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1Ag 2 O / Bi 2 WO 6 Preparation of complex

[0026] Ag 2 O / Bi 2 WO 6 The preparation method of compound comprises the following steps:

[0027] Step 1: Accurately weigh citric acid 0.192g, Bi(NO 3 ) 3 ·5H 2 O 0.970g and Na 2 WO 4 2H 2 0.330g, put into a 250ml Erlenmeyer flask for later use, add 60mL of distilled water into the Erlenmeyer flask, stir magnetically for 30min, adjust the pH to 3, and then ultrasonicate for 30min (ultrasonic power 200W).

[0028] Step 2: Transfer the solution prepared in Step 1 to 100 ml of polytetrafluoroethylene, put it in an oven, and let it react at 180°C for 24 hours. After the reaction, cool to room temperature. The reactant in the reaction kettle was suction filtered to leave the filter residue, the filtrate was discarded, and then washed with water until the pH of the filtrate remained unchanged, and then washed 3 times with absolute ethanol, the filter residue was placed in a petri dish and then placed in an oven f...

Embodiment 2

[0031] The Ag of embodiment 2 different composite ratios 2 O / Bi 2 WO 6 The effect of compound on the adsorption effect of ciprofloxacin

[0032] Step 1: Take 20 mL of ciprofloxacin solution with a concentration of 10 mg / L in a beaker, add 20 mg of different AgNO 3 mass synthesized Ag 2 O / Bi 2 WO 6 The complex was magnetically stirred for 30 min at a rotational speed of 1000 rpm.

[0033] Step 2: After the suspension is sampled and centrifuged, the supernatant is taken to measure the concentration of ciprofloxacin, and the Ag is calculated. 2 O / Bi 2 WO 6 The complex adsorption efficiency of ciprofloxacin, it can be seen that the complex ratio is 5%, 10%, 20%, 30% and 40% Ag 2 O / Bi 2 WO 6 The adsorption and removal rates of the complex to ciprofloxacin were 43.5±4.38%, 69.9±5.65%, 69.5±2.68%, 59.41±6.15% and 69.6±5.71%, respectively, as image 3 shown.

[0034] According to the removal rate of ciprofloxacin by the compound, the compound with a compound ratio of 10% ...

Embodiment 3

[0035] Different adsorption time of embodiment 3 is to Ag 2 O / Bi 2 WO 6 Influence of Complex Adsorption of Ciprofloxacin

[0036] Step 1: Take 20 mL of ciprofloxacin solution with a concentration of 5 mg / L in a beaker, and add accurately weighed 50 mg of Ag with a compounding ratio of 10%. 2 O / Bi 2 WO 6 The complex was stirred magnetically for 2 min, 5 min, 10 min, 20 min, 30 min, 40 min, 50 min, and 60 min at a rotational speed of 1000 rpm, respectively.

[0037] Step 2: After the suspension is sampled and centrifuged, the supernatant is taken to measure the concentration of ciprofloxacin, and the Ag is calculated. 2 O / Bi 2 WO 6 The adsorption efficiency of the complex for ciprofloxacin can be seen at 2min, 5min, 10min, 20min, 30min, 40min, 50min, and 60min. 2.54%, 80.6±2.14%, 87.4±2.95%, 88.7±1.39%, 90.7±2.54% and 91.8±1.41%, such as Figure 4 shown. After 60 minutes of adsorption, the complex has the best adsorption and removal efficiency of ciprofloxacin in water...

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Abstract

The invention discloses a preparation method and application of an Ag2O / Bi2WO6 compound. The preparation method comprises the steps: putting citric acid, Bi(NO3)3.5H2O and Na2WO4.2H2O into a container, adding distilled water, stirring, carrying out ultrasonic treatment, putting into a reaction kettle, carrying out high-temperature reaction, cooling, filtering, and washing filter residues with water until the pH value is unchanged; putting into a drying oven, heating, cooling, washing, drying and grinding to obtain Bi2WO6; mixing the Bi2WO6 solution with an AgNO3 solution, adjusting the solution to be alkaline, and carrying out suction filtration, washing and vacuum drying to obtain a target product; and then removing ciprofloxacin in water by combining magnetic stirring adsorption, controlling the addition amount of the catalyst to be 2.5 g / L, the initial concentration of ciprofloxacin to be 5 mg / L and the magnetic stirring time to be 60 minutes. The removal rate of the Ag2O / Bi2WO6 compound prepared by the method on ciprofloxacin in water can reach 91.8+ / -1.41%.

Description

technical field [0001] The invention relates to the field of environmental pollution restoration, and proposes an Ag 2 O / Bi 2 WO 6 Composite, method for its preparation and use in removing ciprofloxacin from water. [0002] technical background [0003] In recent years, due to its strong antibacterial activity, low drug resistance rate and broad antibacterial spectrum, ciprofloxacin has been widely used in human medicine and veterinary medicine, and has now become one of the most widely used broad-spectrum antibiotics in the world. However, the removal effect of the large amount of antibiotic wastewater produced by traditional treatment methods is not ideal, which seriously endangers human health and sustainable development. The search for a new treatment for ciprofloxacin has become more urgent. The method of adsorption and removal of organic pollutants in wastewater has become a research hotspot. Compared with other processes, this technology has lower equipment require...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/06C02F1/288C02F1/281C02F2101/34C02F2101/36C02F2101/38
Inventor 孙亮王新刘彬
Owner LIAONING UNIVERSITY