Modified carbon nano tube material and preparation method and application thereof

A carbon nanotube and nanotube technology, which is applied to modified carbon nanotube materials and the fields of preparation and application thereof, can solve the problems of complex pollution of sediments, weak heavy metal adsorption capacity, and unsuitability for sediments, and achieves high application value. , Good stability effect, stable structure effect

Active Publication Date: 2018-09-07
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the weak adsorption capacity of carbon nanotubes for heavy metals, they are not suitable for complex pollution of refractory organic matter and heavy metals. However, the actual situation is that complex pollution of sediments is more common, which makes carbon nanotubes stable in situ. The application of the agent is limited

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  • Modified carbon nano tube material and preparation method and application thereof
  • Modified carbon nano tube material and preparation method and application thereof
  • Modified carbon nano tube material and preparation method and application thereof

Examples

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Comparison scheme
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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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Abstract

The invention discloses a modified carbon nano tube material and a preparation method and application thereof. The modified carbon nano tube material comprises a carbon nano tube, the surface of the carbon nano tube is modified with ethylenediamine tetraacetic acid, and the mass content of carboxyl in the modified carbon nano tube is 3%-5%. The preparation method comprises the steps that oxidationtreatment is conducted on the carbon nano tube; an activated carbon nano tube intermediate is prepared; an activated ethylenediamine tetraacetic acid intermediate is prepared; the activated carbon nano tube intermediate is mixed with the activated ethylenediamine tetraacetic acid intermediate, and diethylenetriamine is added for preparing the modified carbon nano tube material. The modified carbon nano tube material has the advantages that the technology is simple, operation is easy, the reaction condition is mild and easy to control, the cost is low, less energy is consumed, and less time isconsumed. The modified material can stabilize refractory organic matter and heavy metal in bottom mud, the stabilization effect is significant, and the modified carbon nano tube material has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of physical and chemical treatment of refractory organic matter and heavy metals in polluted bottom mud, and relates to a modified carbon nanotube material and its preparation method and application. Background technique [0002] Sediment, as an important part of water bodies and the accumulation place of many pollutants in lakes and rivers, is particularly polluted by refractory organic matter and heavy metals. The refractory organic matter and heavy metals in the sediment will not only have a toxic effect on benthic animals and plants, but will also continue to affect the water quality of the overlying water, directly or indirectly affecting the daily life and health of residents. Therefore, the problem of sediment pollution needs to be solved urgently. [0003] The in-situ stabilization of sediment pollutants by using highly adsorbent adsorbents is one of the important ways to control sediment pollution. Many stu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168B01J20/22B01J20/30C02F11/00C02F101/30C02F101/20
Inventor 宋彪陈畅亚曾光明龚继来许飘陈明程敏叶淑静易欢汤湘
Owner HUNAN UNIV
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