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Method for efficiently removing algae from water bodies utilizing carbon nanotubes

A technology of carbon nanotubes and algae, applied in the field of water treatment, can solve the problems of destroying ecological balance, long time for algae removal, long operation cycle, etc., and achieve good removal efficiency, simple operation, and wide application conditions

Inactive Publication Date: 2012-07-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the use of flocculation and adsorption of clay particles to remove algae in physical methods is currently one of the internationally recognized methods, but its disadvantage is that it takes a long time to remove algae, generally 2 to 3 days
Chemical methods usually use algicides such as organic bromine algicides, copper salts, potassium permanganate and other chemical agents to achieve the purpose of algae removal. Chemical methods have obvious algae removal effects, but cause environmental pollution or destroy ecological balance.
The biological method of algae removal technology should adopt methods such as microbial control, algae-eating organisms, and aquatic plant inhibition. In theory, biological algae removal is the most environmentally friendly means of controlling algae, but due to its long operating cycle and slow effect, And from a technical point of view, it is difficult to implement

Method used

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  • Method for efficiently removing algae from water bodies utilizing carbon nanotubes
  • Method for efficiently removing algae from water bodies utilizing carbon nanotubes
  • Method for efficiently removing algae from water bodies utilizing carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Adding carbon nanotubes to tap water to prepare an aqueous solution of carbon nanotubes with a mass concentration of 10 mg / L;

[0019] 2) Use NaOH solution or HCl solution to adjust the pH value of the carbon tube aqueous solution to within the range of 5.0 to 9.0;

[0020] 3 Place the container containing the above-mentioned carbon tube aqueous solution in an ultrasonic cleaner for 15 minutes;

[0021] 4. Add the ultrasonically treated carbon tube suspension into the water body containing algae, stir and shake quickly, and then let the mixture of carbon nanotubes and algae settle for 30 minutes to efficiently remove the algae in the water body.

Embodiment 2

[0023] 1) Adding carbon nanotubes to tap water to prepare an aqueous solution of carbon nanotubes with a mass concentration of 100 mg / L;

[0024] 2) Use NaOH solution or HCl solution to adjust the pH value of the carbon tube aqueous solution to within the range of 5.0 to 9.0;

[0025] 3 Place the container containing the above-mentioned carbon tube aqueous solution in an ultrasonic cleaner for 30 minutes;

[0026] 4) Add the carbon nanotube suspension after ultrasonic treatment into the water containing algae and stir it up quickly, then let the mixture of carbon nanotubes and algae settle for 45 minutes to efficiently remove the algae in the water.

Embodiment 3

[0028] 1) Add carbon nanotubes to tap water to prepare an aqueous solution of carbon nanotubes with a mass concentration of 200 mg / L;

[0029] 2) Use NaOH solution or HCl solution to adjust the pH value of the carbon tube aqueous solution to within the range of 5.0 to 9.0;

[0030] 3) Put the container containing the above-mentioned carbon tube aqueous solution in an ultrasonic cleaner for 30 minutes;

[0031] 4) Add the carbon nanotube suspension after ultrasonic treatment into the water containing algae and stir it quickly, and then let the mixture of carbon nanotubes and algae settle for 60 minutes to efficiently remove the algae in the water.

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Abstract

The invention discloses a method for efficiently removing algae from water bodies utilizing ultrasonic-treated carbon nanotubes. The method comprises the steps of: firstly adding carbon nanotubes to tap water to prepare carbon tube aqueous solution with certain mass concentration; secondly adjusting the pH value of the carbon tube aqueous solution to 5.0-9.0 with NaOH solution or HCl solution; then placing a container holding the carbon tube aqueous solution with pH value adjusted in an ultrasonic device; and finally adding the ultrasonic-treated carbon tube suspension to water bodies containing algae, quickly stirring and shaking uniformly, and then standing and settling the mixed liquid of carbon nanotubes and algae to efficiently remove algae from the water bodies. According to the invention, the used carbon nanotubes are a novel carbon material, which has strong agglomeration and settling capability to algae; and as compared with the traditional carbon material such as activated carbon, the carbon nanotubes have higher removal rate and higher removal speed of algae, and are simple in operation and wide in application conditions.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a method for efficiently removing algae in a water body by utilizing carbon nanotubes. technical background [0002] With the rapid development of social economy and the rapid increase of population, a large amount of untreated industrial wastewater, domestic sewage and agricultural wastewater are discharged into natural waters indiscriminately, and the process of eutrophication in water bodies is accelerated, which in turn leads to frequent occurrence of algal blooms and algae blooms , excessive algae have seriously affected water quality, causing serious harm to human health, ecology and landscape. [0003] At present, the methods of removing algae in water bodies at home and abroad can be mainly divided into three categories: physical methods, chemical methods and biological methods. Among them, the use of flocculation and adsorption of clay particles to remove al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/28
Inventor 林道辉龙志峰
Owner ZHEJIANG UNIV
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