Adsorbent gel ball and preparation method thereof

A gel ball, adsorption technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of limited application of alginate, poor adsorption effect of organic dyes, etc., and achieve excellent adsorption Fruit, good decolorization effect, good adsorption effect

Active Publication Date: 2011-11-30
HUBEI UNIV
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Problems solved by technology

However, the adsorption effect on organic dyes is not good, which also

Method used

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preparation example Construction

[0028] The embodiment of the present invention discloses a preparation method of adsorbent gel balls, comprising:

[0029] a), using a mixed solution of concentrated sulfuric acid and concentrated nitric acid to carry out carboxylation treatment on carbon nanotubes to obtain carboxy-modified carbon nanotubes, the weight ratio of the concentrated sulfuric acid, concentrated nitric acid and carbon nanotubes is 40~90: 30~ 5:30~5;

[0030] b), mixing the carboxyl-modified carbon nanotubes obtained in step a with water-soluble alginate in water to obtain a mixture of alginate and carbon nanotubes;

[0031] c), adding calcium chloride solution to the mixture obtained in step b to obtain adsorptive gel balls.

[0032] The invention combines alginate and carbon nanotubes to prepare adsorption gel balls, and utilizes the excellent adsorption performance of carbon nanotubes on organic polymers and the excellent adsorption performance of alginate on heavy metals to prepare gel balls wit...

Embodiment 1

[0054] 1. Weigh concentrated sulfuric acid, concentrated nitric acid and carbon nanotubes with a weight ratio of 40:30:5, mix them for 1 hour and then use ultrasonic vibration treatment, filter the mixture after ultrasonic treatment, wash until the filtrate is neutral and dry Drying, mixing the dried carbon nanotubes with hydrogen peroxide solution and treating them with ultrasonic vibrations, filtering and washing the ultrasonically treated mixture until the filtrate is neutral, and drying to obtain carboxyl-modified carbon nanotubes.

[0055] 2. Using ultrasonic vibration treatment, disperse the carboxyl-modified carbon nanotubes prepared in step 1 in water, and configure a suspension of carboxyl-modified carbon nanotubes with a concentration of 18g / L. 1L of 30g / L The sodium alginate solution was dropped into 1 L of the above suspension, and mixed ultrasonically for 20 minutes to obtain a mixture of carboxyl-modified carbon nanotubes and sodium alginate.

[0056] 4. Use a sy...

Embodiment 2～ Embodiment 3

[0058] The difference between the above two examples and Example 1 is that the concentration of the carboxy-modified carbon nanotube suspension is 9 g / L and 36 g / L in sequence, and the rest of the procedures are the same as in Example 1. The diameters of the prepared gel balls were 1.6 mm and 2.3 mm respectively.

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Abstract

The invention provides a preparation method for an absorptive gel ball. The method provided by the invention comprises the following steps: a) carrying out carboxylation processing on a carbon nano tube by utilizing the mixed solution of concentrated sulfuric acid and concentrated nitric acid to obtain a carboxyl modified carbon nano tube, wherein the weight ratio of the concentrated sulfuric acid to the concentrated nitric acid to the carbon nano tube is (40-90): (30-5): (30-5); b) mixing the carboxyl modified carbon nano tube and water soluble alginate in water to obtain the mixture of the alginate and the carbon nano tube; and c) adding a calcium chloride solution to the mixture to obtain the absorptive gel ball. The invention also provides an absorptive gel ball. The absorptive gel ball provided by the invention comprises multiple micro-gel balls in a core shell structure, wherein the core of the micro-gel ball is the carboxyl modified carbon nano tube; and the shell is a calcium alginate polymer. The absorptive gel ball provided by the invention has high absorption efficiency and is suitable for the processing of decoloration of wastewater in the fields such as textile, printing and dyeing, printing ink, leather, rubber, coking, papermaking, pharmacy and the like.

Description

technical field [0001] The invention relates to the field of adsorption materials, in particular to an adsorption gel ball and a preparation method thereof. Background technique [0002] Industrial wastewater is wastewater and waste liquid produced in the process of industrial production, which contains industrial production materials, intermediate products, by-products and pollutants produced in the production process lost with water. Industrial wastewater contains a large amount of toxic substances. If industrial wastewater is discharged directly without post-treatment, the toxic substances in it will be discharged into channels, rivers and lakes, polluting surface water; toxic substances will infiltrate into the soil, causing soil pollution and affecting plants and soil. The growth of microorganisms, and toxic substances are absorbed by plants and remain in plants, and then reach the human body through the food chain, causing harm to human health. Therefore, post-treatme...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28
Inventor 蔡芳昌张玉婷马宁蒋涛徐启铭蔡隆昌周威江泰槿张驰
Owner HUBEI UNIV
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