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Preparation method of magnesium oxide modified carbon nanotube material and application of magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery

A carbon nanotube, multi-walled carbon nanotube technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effects of promoting adsorption, good selective adsorption, and efficient adsorption and recovery

Inactive Publication Date: 2021-09-17
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Carbon nanotubes are modified by magnesium oxide and applied to the adsorption and recovery of phosphate, but there are no related reports so far.

Method used

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  • Preparation method of magnesium oxide modified carbon nanotube material and application of magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery
  • Preparation method of magnesium oxide modified carbon nanotube material and application of magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery
  • Preparation method of magnesium oxide modified carbon nanotube material and application of magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Add 1 g of purchased multi-walled carbon nanotubes (with a particle size range of 60 to 100 nm) into 100 ml of MgCl 2 ·6H 2 In O solution, the mass ratio of Mg element to carbon nanotube is 0.12. After 24 hours of magnetic stirring at 120 rpm at room temperature, the mixture was dried in a 388.15K blast oven for 24 hours. Under nitrogen protection, the dried mixture was calcined in a high temperature tube furnace. Adjust the nitrogen flow rate to 60mL / min, keep it for 20 minutes, and exhaust the oxygen in the high temperature tube furnace. Set the initial temperature to 50°C, raise the temperature to 600°C at a rate of 5°C / min, and keep it for 2 hours. After the temperature was cooled to room temperature, the obtained product was washed with deionized water several times to remove impurities, dried in an oven at 65°C to constant weight, fully ground with an agate mortar and then transferred to a polyethylene tube for sealing to obtain Magnesium oxide modified carbon...

Embodiment 2

[0051] Example 1 was repeated with the same steps, except that the mass ratio of Mg element to carbon nanotube was 0.24.

Embodiment 3

[0053] Example 1 was repeated with the same steps, except that the mass ratio of Mg element to carbon nanotube was 0.36.

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Abstract

The invention discloses a preparation method of a magnesium oxide modified carbon nanotube material and application of the magnesium oxide modified carbon nanotube material in phosphorus adsorbing and recovery, and belongs to the technical field of functional material synthesis and water treatment. The preparation method comprises the following steps: stirring and dispersing a multi-walled carbon nanotube in a magnesium chloride solution, and modifying the carbon nanotube by adopting a blending-calcining method to prepare a magnesium oxide modified carbon nanotube; and adding an obtained adsorbent into a phosphate-containing water body to adsorb and recover phosphate in the water body. According to the invention, the material is used as an adsorbent for the first time and is applied to treatment of phosphorus-containing water. The adsorbent shows an excellent phosphate recovery effect, and is simple and convenient to prepare, wide in pH application range, high in adsorbing capacity, good in selective adsorbing and high in cyclic regeneration efficiency. The method has a good prospect when being applied to recovery of phosphate in water, such as in-situ recovery treatment of domestic sewage, chemical wastewater and eutrophicated river water.

Description

technical field [0001] The invention belongs to the technical field of functional material synthesis and water treatment, and in particular relates to a preparation method of magnesium oxide modified carbon nanotube material and its application in adsorption and recovery of phosphorus. Background technique [0002] Phosphorus is an indispensable and important element for living organisms, which restricts the most basic production activities of the ecosystem. The phosphorus cycle in nature is a one-way flow, making phosphate rock a non-renewable and hard-to-replace resource. Phosphate rocks are unevenly distributed around the world, and their reserves are limited, and there are fewer high-quality phosphate rocks with mining value found on the earth. With the rapid growth of the world's population, people's demand for phosphorus is increasing day by day. Many countries have listed phosphate rock as one of the minerals that cannot meet the needs of national economic developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28B01J20/30C02F101/10
CPCB01J20/20B01J20/041C02F1/281C02F2101/105
Inventor 王婧轩江守沛乔森
Owner DALIAN UNIV OF TECH
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