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Nano bimetallic oxide adsorbent for removing tetracycline

A bimetal oxide and adsorbent technology, applied in the direction of adsorption of water/sewage treatment, water pollutants, other chemical processes, etc., can solve pollution and other problems, achieve pollution problems, significant social value and research value, good adsorption effect of effect

Inactive Publication Date: 2021-04-06
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is, aiming at the pollution of antibiotics to water resources, in order to solve the removal problem of tetracycline, propose a kind of method that removes tetracycline in water with nano double metal oxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Accurately weigh 1.25g FeSO 4 •7H 2 O and 1g of polyvinylpyrrolidone (PVP), dissolved in 100ml of deionized water, and heated to 90°C with a constant temperature heating magnetic stirrer; 2mL of 5 mol / L NaOH solution was added dropwise, a green precipitate was formed in the solution, and stood for 15min; Add 5.6 mL of 0.1 mol / L KMnO 4 solution, the precipitate changed from green to dark brown; the mixed solution was stirred at 90°C for 3 hours and then allowed to stand for 4 hours, the solid precipitate was washed 3 times with deionized water and absolute ethanol respectively, the solid precipitate was dried at 90°C, and ground 100-mesh sieve to obtain nanometer double metal oxide adsorbent.

[0020] Take 50ml of tetracycline-containing simulated wastewater with a concentration of 28mg / L and put it into a stoppered Erlenmeyer flask, adjust the pH to 2~3, add Fe 3 o 4 / MnO 2 0.07g, stirred in a magnetic stirrer at 25°C and 180r / min for 24h. After adsorption, the sup...

Embodiment 2

[0022] Operation method is the same as embodiment 1.

[0023] Get 28mg / L containing tetracycline simulated waste water 50ml and put into a stoppered Erlenmeyer flask, Cl — , NO 3 — , C 2 o 4 2— , CO 3 2— When the ion concentration is 5mmol / L and 50mmol / L respectively, the pH of the solution is adjusted to 2.3, and then Fe 3 o 4 / MnO 2 0.05g (1g / L), stirred in a magnetic stirrer at 25°C and 180r / min for 24h, the supernatant was filtered with a 0.22µm needle filter after adsorption, and the removal rates under the condition of coexistence of different concentrations of anions were calculated as Cl — : 70%, 80.7%; NO 3 — : 65.6%, 78.5%; C 2 o 4 2— : 50%, 60.8%; CO 3 2— : 40.1%, 52.4%.

[0024] The order of influence of coexisting anions on the adsorption of tetracycline is CO 3 2— > C 2 o 4 2— >NO 3 — >Cl — .

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Abstract

The present invention provides a nano bimetallic oxide adsorbent for removing tetracycline, the nano bimetallic oxide Fe3O4 / MnO2 adsorbent has high affinity and adsorption selectivity on tetracycline in water, the adsorption suitable pH is 2-3, and the removal rate of tetracycline in high-concentration tetracycline-containing wastewater can reach 85% or above. According to the invention, the nano bimetallic oxide is applied to adsorption treatment of the tetracycline-containing wastewater, and tetracycline in the wastewater can be effectively removed, so that the method for efficiently adsorbing and removing tetracycline is provided for treating the tetracycline-containing wastewater; and the nano bimetallic oxide adsorbent for removing tetracycline has very high social value and research value in the aspects of purification treatment and environmental protection of tetracycline-containing wastewater.

Description

technical field [0001] The invention relates to a nanometer double metal oxide adsorbent for removing tetracycline, which belongs to the technical field of water treatment. Background technique [0002] In recent years, due to the extensive use of antibiotics, most medical wastewater and pharmaceutical wastewater are discharged to sewage treatment plants without reasonable treatment, and some wastewater discharged from agriculture and animal husbandry is directly discharged without reaching the standard treatment, resulting in excessive antibiotic content in the water body . Among them, tetracycline is easy to accumulate in the water environment because of its strong water solubility and stable chemical structure. [0003] At present, tetracycline residues (concentration levels ranging from ng / L to μg / L) have been detected many times in surface water, groundwater, drinking water, soil, and effluent from sewage treatment plants. The accumulation of tetracycline in human bon...

Claims

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Application Information

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IPC IPC(8): B01J20/06C02F1/28C02F101/38C02F101/34
CPCB01J20/06C02F1/281C02F2101/38C02F2101/34
Inventor 唐朝春朱蓓黄从新王顺藤冯文涛阮以宣
Owner EAST CHINA JIAOTONG UNIVERSITY
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