Method for removing tetracycline in water by adsorption method

A technology for tetracycline and water removal, applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of low adsorption rate, poor adsorption efficiency, small adsorption capacity of adsorbent, etc., to achieve adsorption effect Increased, improved adsorption performance, simple operation effect

Inactive Publication Date: 2008-12-31
NANJING UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for removing tetracycline in water by mesoporous carbon adsorption, which can overcome the disadvantages of small adsorption capacity, low adsorption rate and poor adsorption efficiency of the existing adsorption method. According

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dip 1g of SBA-15 in a solution containing 1.25g of sucrose, 0.14g of concentrated sulfuric acid, and 5g of water, stir well, heat at 100°C for 6 hours to evaporate the water, and then polymerize at 160°C for 6 hours to obtain a brown solid. Grind to powder and proceed to the second deposition. The masses of sucrose, concentrated sulfuric acid and water are respectively 0.8g, 0.09g and 5g. Other operations are the same as the first deposition. The mixture deposited twice was carbonized at 850°C for 5 hours under the protection of nitrogen. After grinding, the template was washed with 5% mass fraction of HF, and finally washed with ethanol and a large amount of distilled water, and then dried at 100°C. The mesoporous carbon CMK-3 prepared by the above steps has a pore diameter of about 4nm and a pore volume of about 1.5cm 3 / g, the specific surface area is about 1140cm 2 / g.

[0025] CMK-3 is used as adsorbent to absorb tetracycline in water. Adsorption is carried out in a cl...

Embodiment 2

[0028] As in Example 1, the initial concentration of tetracycline was 10 mg / L, and other conditions were unchanged. The measured adsorption amount of tetracycline was 25.2 mg / g, and the removal rate was 99.7%.

Embodiment 3

[0030] As in Example 1, the initial concentration of tetracycline was 41 mg / L, and other conditions were unchanged. The measured adsorption amount of tetracycline was 103.5 mg / g, and the removal rate was 98.5%.

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Abstract

The invention discloses a method for eliminating tetracycline in the water by a adsorption method; Mesoporous carbon is taken as adsorbent to adsorb and eliminate the tetracycline in the water; the method particularly includes the following steps: 1) synthesizing a template SBA-15 of the mesoporous carbon; 2) taking the SBA-15 as the template to synthesize mesoporous carbon CMK-3; 3) taking the mesoporous carbon CMK-3 as an adsorbent to adsorb tetracycline in water. By adopting the adsorption method to eliminate the tetracycline in the water, the method of the invention can achieve the adsorption performance which is significantly superior to that of the traditional adsorbing material (like activated carbon). Furthermore, the method of the invention has simple operation and significant treatment effect, and the material is easy to be obtained. The method of the invention has high economic and environmental benefits on the elimination of the tetracycline in the water of a micro-polluted water source.

Description

Technical field [0001] The invention relates to a method for removing tetracycline in water, in particular to a method for removing tetracycline from water by an adsorption method. Background technique [0002] Tetracycline (TET) is a broad-spectrum antibiotic widely used clinically. Direct discharge of this type of antibiotic into the water environment will not only poison the organisms in the water body, but also destroy the ecological balance of the water body. While a large number of antibiotics such as tetracycline are used, the pollution and harm they cause to water bodies has also received more and more attention. Studies have shown that the existence of tetracycline in water depends on the acidity and alkalinity of the aqueous solution. It exists in the form of cations in acidic solutions, and exists in the form of zwitterions and anions in neutral and alkaline solutions, respectively. [0003] At present, the main methods for treating tetracycline wastewater at home and ...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/58
Inventor 郑寿荣刘凤玲许昭怡吴铎李丽媛王家宏顾浩穆容心邢涛刘景亮赵瑞东
Owner NANJING UNIV
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