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Method for removing tetracycline by using aluminum-based metal organic framework/graphene oxide composite material

An organic framework and composite material technology, applied in the field of environmental science and engineering, can solve the problems of toxicological effects, selective inhibition, ecological environment and human health hazards, and low adsorption efficiency, achieving good water stability and low cost. The effect of low cost and simple preparation process

Inactive Publication Date: 2018-08-03
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The continuous existence of tetracycline and its metabolites in the water environment may produce toxic effects, selectively inhibit and kill some environmental microorganisms, and at the same time induce the production of drug-resistant bacteria, causing unpredictable harm to the ecological environment and human health
However, these adsorbents have their own defects when used to treat antibiotics in pharmaceutical wastewater, such as poor selectivity and low adsorption efficiency. Most of them have high preparation costs and complicated processes.

Method used

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  • Method for removing tetracycline by using aluminum-based metal organic framework/graphene oxide composite material
  • Method for removing tetracycline by using aluminum-based metal organic framework/graphene oxide composite material
  • Method for removing tetracycline by using aluminum-based metal organic framework/graphene oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: prepare MIL-68 (Al) / GO material

[0036] Dissolve 3.00g of aluminum chloride and 3.00g of terephthalic acid in 150mL of N,N-dimethylamide, stir well to dissolve completely, then slowly add 0.12g of graphene oxide powder, and mix evenly; 130°C The reaction was stirred at constant temperature for 16 hours, and then naturally cooled to room temperature. The filtered product was washed 2-3 times with N,N-dimethylamide and 2-3 times with methanol, then dried and activated under vacuum at 105°C for 12 hours, and labeled as MIL-68(Al) / GO.

[0037] The MIL-68(Al) / GO material prepared in Example 1 of the present invention was characterized by using the Empyrean X-ray diffractometer produced by Panalytical in the Netherlands, wherein the operating conditions were: copper target, 40KV, 40mA, step size 0.02626 The scanning speed is 8.109 seconds / step. The result is as figure 1 shown, from figure 1It can be seen that the XRD diffraction peaks of the MIL-68(Al) / GO m...

Embodiment 2

[0044] Example 2: Adsorption of tetracycline in water by MIL-68(Al) / GO

[0045] Take ten 250mL Erlenmeyer flasks, and add 100mL of 50mg / L tetracycline aqueous solution to each Erlenmeyer flask. Each group of Erlenmeyer flasks was added with the MIL-68(Al) / GO material prepared in Example 1, and the amount of the material added in each Erlenmeyer flask was 20 mg. At 298K temperature and 150 rpm, the adsorption experiment was carried out in a constant temperature shaker, and the concentration of the solution was measured by regular sampling for analysis. The curves of adsorption capacity and removal rate at different adsorption times are shown in figure 2 shown, from figure 2 It can be seen that the adsorption rate of MIL-68(Al) / GO to tetracycline in water is very fast in the first 90 minutes, and can reach adsorption equilibrium in about 300 minutes. For the tetracycline solution with an initial concentration of 50 mg / L, the maximum adsorption capacity can reach 202.65 mg / g,...

Embodiment 3

[0046] Example 3: Adsorption of tetracycline in water by MIL-68(Al) / GO

[0047] Take 21 250mL Erlenmeyer flasks and divide them into three groups. The concentration gradient of tetracycline aqueous solution in each group is 5, 10, 15, 20, 30, 40, 60mg / L, and the volume is 100mL. The MIL-68(Al) / GO material prepared in Example 1 was added to each Erlenmeyer flask in an amount of 20 mg. The three groups were adsorbed at 288K, 298K and 308K, in a constant temperature shaker at 150 rev / min, and the adsorption time was 6 hours. The adsorption amounts at different adsorption temperatures and initial concentrations were as follows: image 3 shown, from image 3 It can be seen that when the initial concentration of tetracycline is less than 20 mg / L, the temperature has almost no effect on the adsorption capacity; when the initial concentration of tetracycline is greater than 20 mg / L, the influence of temperature on the adsorption capacity begins to appear, and as the temperature incre...

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Abstract

The invention belongs to the field of environment science and engineering, and discloses a method for removing tetracycline by using an aluminum-based metal organic framework / graphene oxide compositematerial. By using the method, the aluminum-based metal organic framework / graphene oxide composite material is uniformly scattered into a water body containing tetracycline; the pH is regulated to 2 to 11; adsorption is performed. The composite material is positively charged; the tetracycline is negatively charged in water solution; a strong static electricity effect can be formed between adsorbents and adsorbates; secondly, the compact hexangonal carbon atom plane of the graphene oxide can generate pi-pi effect with benzene rings on the tetracycline; the adsorption is enhanced; next, the metal aluminum ions in the composite materials can form Al-N covalent bonds with nitrogen atoms on the tetracycline; the adsorption action force can be further reinforced. Through the cooperated effect among three parts, the prepared aluminum-based metal organic framework / graphene oxide composite material has the strong adsorption and high adsorption volume on the tetracycline in water.

Description

technical field [0001] The invention belongs to the field of environmental science and engineering, and particularly relates to a method for removing tetracycline by using an aluminum-based metal organic framework / graphene oxide composite material. Background technique [0002] In recent years, with the development of industrialization, environmental problems have become increasingly prominent, and the abuse of antibiotics has become a worldwide problem. my country is one of the countries with the most serious abuse of antibiotics. Antibiotics have been detected in some major rivers, such as the Yellow River, Pearl River, Chaohu Lake and Jiulong River. Tetracycline (Tetracycline, TC) is a typical antibiotic, which has been widely used in human medicine and animal breeding to control infection, improve feed utilization and promote animal growth. However, animals cannot metabolize and degrade tetracycline, and tetracycline after use is discharged into the environment almost u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/20B01J20/28B01J20/30C02F1/28C02F101/38C02F101/34
CPCB01J20/20B01J20/226B01J20/28054C02F1/288C02F2101/34C02F2101/38
Inventor 程建华余林玲武士川张继勇陈柔羲周心慧
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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