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Magnetic nano bimetallic oxide adsorbent and application thereof

A double metal oxide and magnetic nanotechnology, applied in the direction of alkali metal oxide/hydroxide, alkali metal compound, adsorption water/sewage treatment, etc., to solve pollution problems, significant social value and research value, good adsorption effect Effect

Pending Publication Date: 2021-04-02
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is, in order to solve the treatment problem containing antibiotic waste water, the present invention proposes a kind of magnetic nano double metal oxide adsorbent and its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Accurately weigh 1.0099925g Fe(NO 3 ) 3 •9H 2 O and 1.455g Co(NO 3 ) 2 •6H 2 O (molar ratio Fe 3+ / Co 2+ =1:2) was dissolved in 50ml deionized water, and kept stirring; at the same time, slowly added 1.0mol / L NaOH solution dropwise to the mixed solution until the pH of the mixed solution reached about 11 and remained basically unchanged; stirred at a constant speed for 2 hours, and The solid precipitate was filtered and washed until neutral; dried at 105°C, and ground through a 100-mesh sieve to obtain Fe 3 o 4 / co 3 o 4 .

[0016] 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 9, add Fe 3 o 4 / Co 3 o 4 0.07g; Stir in a magnetic stirrer at 25°C and 180r / min for 16h. After adsorption, the supernatant was filtered with a 0.22µm needle filter, and the calculated removal rate was 92.7%.

Embodiment 2

[0018] Operation method is the same as embodiment 1.

[0019] 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 9, and then Fe 3 o 4 / co 3 o 4 0.05g (1g / L), stirred in a magnetic stirrer at 25°C and 180r / min for 16h, 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 — : 72%, 85.7%; NO 3 — : 70.6%, 81.5%; C 2 o 4 2— : 60%, 70.8%; CO 3 2— : 50.2%, 62.3%. 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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PUM

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Abstract

The invention discloses a magnetic nanometer bimetallic oxide adsorbent and an application thereof. The magnetic nanometer bimetallic oxide Fe3O4 / Co3O4 adsorbent has high affinity and adsorption selectivity on tetracycline in water, the adsorption is suitable for pH (8-9), and the removal rate of tetracycline in high-concentration tetracycline-containing wastewater can reach 90% or above. By applying the magnetic nano bimetallic oxide to adsorption treatment of tetracycline-containing wastewater, tetracycline in the wastewater can be effectively removed, so an efficient adsorbent and a methodfor adsorbing and removing tetracycline are provided for treating the tetracycline-containing wastewater; the adsorbent has the very high social value and research value in the aspects of purificationtreatment and environmental protection of tetracycline-containing wastewater.

Description

technical field [0001] The invention relates to a magnetic nanometer double metal oxide adsorbent and its application, belonging to the technical field of water treatment. Background technique [0002] Antibiotics are a class of compounds produced by microbial metabolic activities that have anti-pathogen or other activities and can interfere with the development of other cells. Once they come out, they are widely used in the treatment of human or animal diseases. Among them, the proportion of production and use is relatively large of the tetracycline antibiotics. Tetracycline has strong water solubility and stable chemical structure, and is easy to accumulate in the water environment. 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 bones can affect human development; it com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28C02F1/28C02F101/16C02F101/34
CPCB01J20/06B01J20/28009B01J20/28004C02F1/281C02F2101/16C02F2101/34
Inventor 唐朝春朱蓓黄从新王顺藤冯文涛阮以宣
Owner EAST CHINA JIAOTONG UNIVERSITY