Modified carbon nanotube material and its preparation method and application
A technology of carbon nanotubes and nanotubes, applied in the field of modified carbon nanotube materials and their preparation and application, can solve the problems of unsuitable sediment, weak heavy metal adsorption capacity, composite pollution of sediment, etc., and achieve good stabilization effect , stable structure and high application value
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Embodiment 1
[0033] A modified carbon nanotube material includes carbon nanotubes, and the surface of the carbon nanotubes is modified with ethylenediaminetetraacetic acid, wherein the ethylenediaminetetraacetic acid is modified on the surface of the carbon nanotubes through covalent grafting. The mass content of carboxyl groups in the modified carbon nanotube material is 4.53% (w / w).
[0034] A preparation method of the modified carbon nanotube material in the above embodiment, comprising the following steps:
[0035] (1) Oxidation treatment of carbon nanotubes: 1g of multi-walled carbon nanotubes (commercially available, the outer diameter of the multi-walled carbon nanotubes is 10-20nm, and the length is 5-20 μm) is placed in a mixture of concentrated sulfuric acid and concentrated nitric acid In the mixed acid solution (the mixed solution is composed of 150mL concentrated sulfuric acid and 50mL concentrated nitric acid), ultrasonically treat for 30 minutes, heat to boil, keep for 6 hou...
Embodiment 2
[0049] An application of a modified carbon nanotube material in stabilizing refractory organic matter and heavy metals in sediment, specifically the application of phenanthrene and lead in stabilizing sediment, comprising the following steps:
[0050] According to the mass ratio of modified carbon nanotube material and bottom mud (in terms of wet weight), it is 0.5: 100, 1: 100, 2: 100, 4: 100, and the modified carbon nanotube material prepared in Example 1 is weighed , join respectively the bottom mud containing phenanthrene and lead (the content of phenanthrene in this bottom mud is 2.87g / kg, the content of lead is 603.5mg / kg, and the pH value of bottom mud is 7.92), after mixing evenly, at temperature 18°C~30°C (In the actual treatment process, the temperature of static treatment is actually dynamically changed, so it is only necessary to ensure that the temperature is 18°C~30°C to achieve effective treatment of phenanthrene and lead-containing sediment through static treatm...
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