Modified active carbon and preparation method and application thereof

A technology of activated carbon and activated carbon powder, applied in the field of drinking water treatment, can solve the problems of difficult microbial cultivation and screening, introduction of pathogenic bacteria, low removal efficiency, etc., and achieve the effects of avoiding solid waste pollution, increasing adsorption capacity, and reducing costs

Inactive Publication Date: 2012-06-27
翟云波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional activated carbon adsorption method only performs a small amount of treatment on the activated carbon to improve some physical and chemical properties of the activated carbon surface, so that the adsorption capacity of the activated carbon is still very low, and the activated carbon after adsorption saturation cannot be recycled, and the cost is very high. The removal efficiency is still very low and the practicability

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  • Modified active carbon and preparation method and application thereof
  • Modified active carbon and preparation method and application thereof
  • Modified active carbon and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0027] A modified activated carbon of the present invention contains a quaternary ammonium salt structure and a pyridine structure on the surface, and the quaternary ammonium salt structure and the pyridine structure are obtained by oxidizing, amination and methylating the surface of the activated carbon.

[0028] The preparation method of the above modified activated carbon is as follows figure 1 As shown, it specifically includes the following steps:

[0029] (1) Select coconut shell activated carbon, grind and grind it, pass through 200 mesh and 400 mesh sieves, sieving, and place in an oven at 100°C for 24 hours; take 10g of dried activated carbon and place it in a 500ml beaker. Add 300ml of nitric acid solution with a concentration of 8mol / L, place the beaker in a water bath at 60℃~80℃, soak and stir for 20 hours, take out the activated carbon to cool, then wash the activated carbon with deionized water 3 to 4 times, and then place it at 100℃ Dry for 24 hours in an oven at a c...

Embodiment 2

[0045] The modified activated carbon prepared in Example 1 was used to remove perchlorate in drinking water, and the prepared modified activated carbon was added to drinking water containing perchlorate for testing (including adsorption reaction and modified activated carbon regeneration) (Such as figure 1 Shown), specifically including the following steps:

[0046] (1) Adsorption test

[0047] A plexiglass column is used to make an adsorption column with a length of 8.2cm and a diameter of 0.357cm. The volume of the adsorption column is 0.82cm 3 , Obtain water samples from drinking water sources, and the content of perchlorate in the water samples is 0.075mg / L, Cl - The concentration is 7.2mg / L, NO 3 - The concentration is 25.7mg / L, SO 4 2- The concentration is 30mgl / L, HCO 3 - The concentration of is 145mg / L, and the modified activated carbon prepared in Example 1 is added to the adsorption column to perform the adsorption reaction;

[0048] During the detection process, the volume...

Embodiment 3

[0052] A method for preparing the modified activated carbon of the present invention is carried out according to the steps of Example 1. The difference from Example 1 is that the gas introduced in the ammoniating process is ammonia and oxygen, and the volume ratio is V NH3 : V O2 =1:1, the flow rates of ammonia and air are both controlled to 10ml / min, and the ammoniated process is carried out after mixing uniformly; the modified activated carbon obtained is tested according to the method of Example 2. The results show that the final activated carbon penetrates completely The volume of the water sample passed was 7900BV, and the adsorption capacity of activated carbon was expanded by 6.3 times. After regeneration, the adsorption capacity was 6650BV, which was 84.2% restored.

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Abstract

The invention discloses modified active carbon. The surface of the modified active carbon has a quaternary ammonium salt structure (N-Q) and a naphthyridine structure (N-6), wherein the quaternary ammonium salt structure and the naphthyridine structure are obtained through oxidation, ammoniation and methylation treatment and follow-up treatment to the surface of active carbon. The invention further discloses a preparation method of modified active carbon correspondingly. The preparation method comprises the steps: active carbon is subject to nitric acid oxidation treatment, ammonia ammoniation treatment and then methylation treatment to obtain modified active carbon. The invention further discloses the application of modified active carbon used removing perchlorate in drinking water. The modified active carbon has the advantages of high adsorption capacity, zero pollution, and low cost.

Description

Technical field [0001] The invention relates to the field of drinking water treatment, in particular to a modified activated carbon and a preparation method and application thereof. Background technique [0002] In my country, there are a large number of chemical plants using potassium perchlorate as the direct product, which are widely distributed throughout the country. Companies that use ammonium perchlorate as an oxidation additive in industrial production are even more common. At the same time, my country is still a big country in the manufacture and consumption of fireworks. The main component of oxidant in fireworks is potassium perchlorate. Many environmental problems have been brought about during the production and use of these perchlorates. The Research Center for Eco-Environmental Sciences of the Chinese Academy of Sciences has collected and measured samples of raw water and factory water from 9 drinking water plants in Beijing. The survey results found that the raw...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J20/34C02F1/28C02F1/58
Inventor 翟云波陈家俊兰远明曾光明
Owner 翟云波
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