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Preparation method and application of lysine functionalized layered double hydroxide adsorbent

A hydroxide, lysine technology, applied in chemical instruments and methods, adsorption water/sewage treatment, water pollutants, etc., can solve problems such as poor adsorption performance and high price

Pending Publication Date: 2021-12-21
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of poor adsorption performance or high price of existing functional materials, the purpose of the present invention is to disclose a preparation method of a lysine functionalized layered double hydroxide (Ly@FeZn) adsorbent

Method used

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  • Preparation method and application of lysine functionalized layered double hydroxide adsorbent
  • Preparation method and application of lysine functionalized layered double hydroxide adsorbent
  • Preparation method and application of lysine functionalized layered double hydroxide adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of Ly@FeZn adsorbent, comprising the steps of:

[0030] a) 3mmol Fe(NO 3 ) 3 9H 2 O and 6mmol Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water;

[0031] b) adjusting the pH value of the above mixed solution to 10 with a concentration of 1M NaOH;

[0032] c) 5.8mmol lysine was slowly added to the mixture and stirred for 5 minutes;

[0033] d) sealing the obtained mixed solution in an autoclave lined with polytetrafluoroethylene, adjusting the oven temperature to 60° C., and hydrothermally reacting for 24 hours;

[0034] e) Take out the mixed solution after the reaction, pour out the supernatant, pour the remaining mixture into a centrifuge tube, adjust the speed of the centrifuge to 4000rpm, centrifuge for 3 minutes, and separate the solid;

[0035] f) The separated solid was washed three times with deionized water, and finally dried in an oven at 60 °C for 12 hours to obtain Ly@FeZn adsorbent.

[0036] Experiments showed that the ...

Embodiment 2

[0038] A preparation method of Ly@FeZn adsorbent, comprising the steps of:

[0039] a) 3mmol Fe(NO 3 ) 3 9H 2 O and 6mmol Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water;

[0040] b) adjusting the pH value of the above mixed solution to 10 with a concentration of 1M NaOH;

[0041] c) 5.8mmol lysine was slowly added to the mixture and stirred for 5 minutes;

[0042]d) sealing the obtained mixed solution in an autoclave lined with polytetrafluoroethylene, adjusting the oven temperature to 60° C., and hydrothermally reacting for 24 hours;

[0043] e) Take out the mixed solution after the reaction, pour out the supernatant, pour the remaining mixture into a centrifuge tube, adjust the speed of the centrifuge to 4000rpm, centrifuge for 3 minutes, and separate the solid;

[0044] f) The separated solid was washed three times with deionized water, and finally dried in an oven at 60 °C for 12 hours to obtain Ly@FeZn adsorbent.

[0045] Experiments showed that the r...

Embodiment 3

[0047] A preparation method of Ly@FeZn adsorbent, comprising the steps of:

[0048] a) 3mmol Fe(NO 3 ) 3 9H 2 O and 6mmol Zn(NO 3 ) 2 ·6H 2 O was dissolved in 100mL deionized water;

[0049] b) adjusting the pH value of the above mixed solution to 10 with a concentration of 1M NaOH;

[0050] c) 5.8mmol lysine was slowly added to the mixture and stirred for 5 minutes;

[0051] d) sealing the obtained mixed solution in an autoclave lined with polytetrafluoroethylene, adjusting the oven temperature to 60° C., and hydrothermally reacting for 24 hours;

[0052] e) Take out the mixed solution after the reaction, pour out the supernatant, pour the remaining mixture into a centrifuge tube, adjust the speed of the centrifuge to 4000rpm, centrifuge for 3 minutes, and separate the solid;

[0053] f) The separated solid was washed three times with deionized water, and finally dried in an oven at 60 °C for 12 hours to obtain Ly@FeZn adsorbent.

[0054] Experiments showed that the ...

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Abstract

The invention belongs to the technical field of composite materials, and relates to a preparation method of a lysine functionalized layered double hydroxide (Ly@FeZn) adsorbent. The method comprises the following steps: dissolving iron salt and zinc salt in deionized water to form a solution, adjusting the pH value to 10-11 by NaOH, slowly adding lysine, and uniformly stirring; and sealing the mixed solution in an autoclave lined with polytetrafluoroethylene, carrying out hydrothermal reaction at 60-120 DEG C for 12-24 hours, taking out, centrifuging, washing the solid with deionized water, and carrying out drying at 60 DEG C for 8-16 hours to obtain the product. The prepared Ly@FeZn adsorbent can be applied to adsorption of antibiotics. The preparation method is simple, the process conditions are controllable, and the raw material cost is low. Experiments show that the prepared Ly@FeZn adsorbent can efficiently remove high-concentration antibiotics, especially ciprofloxacin and norfloxacin. The removal rates of 50 mg of the Ly@FeZn adsorbent on ciprofloxacin and norfloxacin (50 mL 200 mg / L) are as high as 98.48% and 95.05% respectively. The adsorbent is expected to be applied and popularized in removing antibiotics in water.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a layered composite metal hydroxide (Layered Double Hydroxides, LDHs) adsorbent, in particular to a lysine functionalized layered double hydroxide (Ly@FeZn) adsorbent. Preparation method and its application for removing antibiotics. Background technique [0002] Currently, antibiotics are widely used in healthcare and animal feed, and due to their high usage, they have been considered as pollutants that need to be dealt with urgently. Among the many antibiotics used, ciprofloxacin (CIP), norfloxacin (NOR) and ofloxacin (OFL) are the main members of fluoroquinolones, which have been detected in water and soil, and have great impact on ecology. system and human health pose a potential risk threat. On the other hand, the potential harm of antibiotics lies in the abuse, which will bring resistance genes to the ecological environment and increase the resistance of environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/34C02F101/36C02F101/38
CPCB01J20/06B01J20/22C02F1/281C02F1/285C02F2101/36C02F2101/34C02F2101/38B01J2220/4806B01J2220/4812
Inventor 周爱刘苏苏胡玉瑛郑晓环彭小明戴红玲魏杨胡锋平
Owner EAST CHINA JIAOTONG UNIVERSITY
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