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Activated carbon, preparation method of activated carbon and method for treating uranium-containing wastewater

A treatment method, activated carbon technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as safety threats, complex treatment process, secondary pollution, etc., and achieve low cost , The preparation process is simple, and the effect of easy operation and control

Active Publication Date: 2017-05-24
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Coagulation sedimentation method, ion exchange method, evaporation concentration method, biological treatment method and extraction separation method will produce a large amount of mud in the actual treatment of wastewater containing radioactive substances, causing secondary pollution, and it is difficult to achieve the best treatment conditions. The processing technology is complicated, the cost is high, and there are certain security threats

Method used

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  • Activated carbon, preparation method of activated carbon and method for treating uranium-containing wastewater
  • Activated carbon, preparation method of activated carbon and method for treating uranium-containing wastewater
  • Activated carbon, preparation method of activated carbon and method for treating uranium-containing wastewater

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Embodiment 1

[0057] The preparation method of gac of the present invention comprises the following steps:

[0058] (1), wash the surface of the aerial root of the banyan tree with water, clean the dirt on the surface, dry it at 105°C for 24 hours, dry the aerial root, and then cut it to 2-3cm per section;

[0059] (2), the aerial root of banyan tree is soaked 25~35h with the phosphoric acid of 70% with mass concentration, oven dry, the mass ratio of described phosphoric acid and the aerial root of banyan tree is 1:1;

[0060] (3), carbonizing and activating the aerial roots of banyan tree obtained in step (2) at 700°C for 3 hours;

[0061] (4), wash with distilled water of 95~100 ℃ until the product obtained after step (3) carbonization and activation is neutral, and dry;

[0062] (5), grind, cross the step of 200 mesh sieves, obtain described activated carbon.

Embodiment 2

[0064] The preparation method of gac of the present invention comprises the following steps:

[0065] (1), wash the surface of the aerial root of the banyan tree with water, clean the dirt on the surface, dry it at 105°C for 24 hours, dry the aerial root, and then cut it to 2-3cm per section;

[0066] (2), the aerial root of banyan tree is soaked 28h with the phosphoric acid of 60% with mass concentration, oven dry, the mass ratio of described phosphoric acid and the aerial root of banyan tree is 2:1;

[0067] (3), carbonizing and activating the aerial roots of the banyan tree obtained in step (2) at 600°C for 2 hours;

[0068] (4), wash with distilled water of 95~100 ℃ until the product obtained after step (3) carbonization and activation is neutral, and dry;

[0069] (5), grind, pass the step of 80 mesh sieves, obtain described activated carbon.

Embodiment 3

[0071] The preparation method of gac of the present invention comprises the following steps:

[0072] (1), wash the surface of the aerial root of the banyan tree with water, clean the dirt on the surface, dry it at 105°C for 24 hours, dry the aerial root, and then cut it to 2-3cm per section;

[0073] (2), the aerial root of banyan tree is soaked 25h with the phosphoric acid of 50% with mass concentration, oven dry, the mass ratio of described phosphoric acid and the aerial root of banyan tree is 3:1;

[0074] (3), carbonizing and activating the aerial roots of banyan tree obtained in step (2) at 500° C. for 1 h;

[0075] (4), wash with distilled water of 95~100 ℃ until the product obtained after step (3) carbonization and activation is neutral, and dry;

[0076] (5), grind, pass the step of 80 mesh sieves, obtain described activated carbon.

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Abstract

The invention discloses activated carbon and a preparation method thereof. The preparation method comprises the following steps: (1) soaking aerial roots of banyan trees in phosphoric acid with the mass concentration of 50-70% for 25-35 hours, and drying, wherein a mass ratio of the phosphoric acid to the aerial roots of banyan trees is 1:1 to 3:1; (2) carbonizing and activating the aerial roots of banyan trees obtained in the step (1) for 1-3 hours under the condition of 500-700 DEG C; (3) washing the product obtained by carbonizing and activating in the step (2) to be neutral with distilled water at the temperature of 95-100 DEG C, and drying; and (4) grinding, and screening through a 80-200-mesh sieve, thereby obtaining the activated carbon. The invention further discloses a method for treating uranium-containing wastewater. The preparation process of the activated carbon disclosed by the invention is simple, easy to operate and control and low in cost. The activated carbon prepared by the invention is used for adsorbing uranium in the uranium-containing wastewater, and an aim of efficiently removing the uranium can be achieved.

Description

technical field [0001] The invention relates to activated carbon, a preparation method thereof, and a treatment method for uranium-containing wastewater, in particular to a banyan aerial root activated carbon, a preparation method thereof, and a treatment method for wastewater containing uranium. Background technique [0002] Uranium (U) is a silvery-white metallic element with natural radioactivity, and its atomic number is 92. In nature, there are three isotopes of uranium, among which 238U is the most abundant isotope, and the half-lives of the three isotopes are relatively long, as long as hundreds of millions or even billions of years; in the earth's crust, the element abundance of uranium is the second 51, many ores contain uranium. [0003] Uranium in uranium-containing wastewater mainly exists in the chemical valence states of tetravalent and hexavalent, but relatively speaking, hexavalent uranium has better water solubility and is more difficult to be removed. Ther...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J2220/4825C02F1/283C02F2101/006C02F2101/20
Inventor 王津刘娟梁嘉仪梁燕珊肖唐付陈迪云陈永亨宋刚李伙生
Owner GUANGZHOU UNIVERSITY
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