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
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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
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