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Preparation method of CA-Al-KABs xerogel adsorbent and application of CA-Al-KABs xerogel adsorbent in wastewater treatment

A technique of ca-al-kabs and xerogel, which is applied in the field of adsorbent synthesis, can solve the problems of limited application of antibiotics, difficulty in solid-liquid separation, limited adsorption capacity of antibiotics, etc., to achieve reliable theoretical and practical support, broad application prospects, The effect of solving the difficulty of solid-liquid separation

Inactive Publication Date: 2020-09-15
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, kaolin has limited adsorption capacity for antibiotics and difficult solid-liquid separation, so its application in the treatment of antibiotics is greatly restricted.

Method used

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  • Preparation method of CA-Al-KABs xerogel adsorbent and application of CA-Al-KABs xerogel adsorbent in wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A preparation method of CA-Al-KABs xerogel adsorbent, comprises the steps:

[0030] a) Disperse 20 g of kaolin in 100 mL of deionized water and shake for 8 h, let it stand for 15 min, and discard the precipitated part to obtain a kaolin suspension;

[0031] b) Mix the suspension with 50 mL, 1.0 mol / L NaCl solution and stir for 12 h, remove the supernatant after settling, wash the resulting solid with ultrapure water for 3 times, then dry at 60 °C for 12 h, grind to 100-200 meshes to obtain Na-Kaolin;

[0032] c) Under vigorous stirring in a water bath at 60 °C, add 0.4 mol / L AlCl to 50 mL 3 ·6H 2 Slowly drop 50mL, 0.96 mol / L NaOH solution into the O solution, and stir for 20 min to obtain the Al pillared solution;

[0033] d) Disperse 2.5 g of Na-Kaolin in 100 mL of deionized water, then drop 100 mL of 0.2 mol / L Al pillar solution into it, stir for 22 h, let stand for 12 h, and wash the resulting precipitate with ultrapure water 3 times, then dried at 60 °C for 12 h...

Embodiment 2

[0038] A preparation method of CA-Al-KABs xerogel adsorbent, comprises the steps:

[0039] a) Disperse 20 g of kaolin in 100 mL of deionized water and shake for 8 h, let it stand for 15 min, and discard the precipitated part to obtain a kaolin suspension;

[0040] b) Mix the suspension with 50 mL, 1.0 mol / L NaCl solution and stir for 12 h, remove the supernatant after settling, wash the resulting solid with ultrapure water for 3 times, then dry at 60 °C for 12 h, grind to 100-200 meshes to obtain Na-Kaolin;

[0041] c) Under vigorous stirring in a water bath at 60 °C, add 0.4 mol / L AlCl to 50 mL 3 ·6H 2 Slowly drop 50mL, 0.96 mol / L NaOH solution into the O solution, and stir for 20 min to obtain the Al pillared solution;

[0042] d) Disperse 2.5 g of Na-Kaolin in 100 mL of deionized water, then drop 100 mL of 0.2 mol / L Al pillar solution into it, stir for 22 h, and let it stand for 12 h. Wash 3 times, then dry at 60°C for 12 hours, and grind to 100-200 mesh to obtain Al-Ka...

Embodiment 3

[0047] A preparation method of CA-Al-KABs xerogel adsorbent, comprises the steps:

[0048] a) Disperse 20 g of kaolin in 100 mL of deionized water and shake for 8 h, let it stand for 15 min, and discard the precipitated part to obtain a kaolin suspension;

[0049] b) Mix the suspension with 50 mL, 1.0 mol / L NaCl solution and stir for 12 h, remove the supernatant after settling, wash the resulting solid with ultrapure water for 3 times, then dry at 60 °C for 12 h, grind to 100-200 meshes to obtain Na-Kaolin;

[0050] c) Under vigorous stirring in a water bath at 60 °C, add 0.4 mol / L AlCl to 50 mL 3 ·6H 2 Slowly drop 50mL, 0.96 mol / L NaOH solution into the O solution, and stir for 20 min to obtain the Al pillared solution;

[0051] d) Disperse 2.5 g of Na-Kaolin in 100 mL of deionized water, then drop 100 mL of 0.2 mol / L Al pillar solution into it, stir for 22 h, and let it stand for 12 h. Wash 3 times, then dry at 60°C for 12 hours, and grind to 100-200 mesh to obtain Al-Ka...

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Abstract

The invention belongs to the technical field of adsorbent synthesis, and relates to a xerogel adsorbent, in particular to a preparation method of a CA-Al-KABs xerogel adsorbent, which comprises the following steps: mixing a kaolin suspension and 1.0 mol / L sodium salt solution, stirring, cleaning the solid, drying, and grinding to obtain sodium-based kaolin Na-Kaolin; slowly dropwise adding an isopyknic 0.96 mol / L NaOH solution into the 0.4 mol / L aluminum salt solution in a water bath at 60 DEG C to obtain an Al pillared solution; dispersing the obtained Na-Kaolin in deionized water according to a mass ratio of (2-3): 100, and dropwise adding an Al pillared solution to obtain aluminum-based kaolin Al-Kaolin; adding Al-Kaolin into 20 g / L of a sodium alginate solution, stirring, carrying outultrasonic treatment, adding a 0.5 mol / L cross-linking solution, hardening, filtering, washing and drying. The kaolin is subjected to composite modification, CA-Al-KABs xerogels with different forms are prepared according to needs while the adsorption effect is kept, and the difficulty of solid-liquid separation is solved. The prepared xerogel can effectively remove antibiotics, especially ciprofloxacin and norfloxacin, in wastewater, and provides theoretical and experimental support for practical application.

Description

technical field [0001] The invention belongs to the technical field of adsorbent synthesis, and relates to a dry gel adsorbent, in particular to a preparation method of a CA-Al-KABs dry gel adsorbent and its application to wastewater treatment. Background technique [0002] With the development of medical technology, antibiotics are widely used to prevent infection and treat various diseases of humans and animals. However, antibiotics are difficult to be completely metabolized and absorbed in humans and animals, and 50-80% of them are excreted as original drugs or incomplete metabolites and enter the environment. Antibiotics entering water will induce antibiotic-resistant pathogens, which will bring ecological risks and endanger life and health. The vast majority of antibiotic molecules have low degradability, and thus, the removal of antibiotics from aqueous environments is an increasingly urgent problem. [0003] At present, the removal methods of antibiotics in water ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C02F1/28C02F103/34
CPCB01J20/12B01J20/28047B01J20/3085C02F1/281C02F2103/343
Inventor 胡玉瑛潘成胡锋平彭小明戴红玲刘苏苏郑晓环
Owner EAST CHINA JIAOTONG UNIVERSITY
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