Porous carbon adsorbent as well as preparation method and application thereof

An adsorbent, porous carbon technology, applied in chemical instruments and methods, adsorbed water/sewage treatment, other chemical processes, etc., can solve the problems of high raw material price and complex preparation process, and achieve enhanced adsorption effect, low cost, high quality The effect of the adsorption effect

Inactive Publication Date: 2016-01-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these reports all use single-component magnesium oxide as the adsorbent, and the preparation process is complicated, and the raw material price is relatively high.

Method used

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  • Porous carbon adsorbent as well as preparation method and application thereof
  • Porous carbon adsorbent as well as preparation method and application thereof
  • Porous carbon adsorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Embodiment 1, the preparation of porous carbon adsorbent

[0060] Measure 1g of magnesium nitrate, add it to 20ml of water and stir to dissolve at room temperature (25°C) to obtain a transparent and clear aqueous solution of magnesium nitrate, then take 10g of cellulose powder (particle size: 5-10μm), and use mechanical stirring, while stirring Added to the above magnesium nitrate solution, as the cellulose absorbs water, the solution becomes viscous, the fluidity becomes poor, and the stirring becomes more difficult. After the cellulose is fully absorbed and impregnated, the cellulose slurry is obtained after uniform stirring for 12 hours. Then take the slurry and fill it up in a disc-shaped mold, fully dry it in an air-blast drying oven at 80 degrees Celsius (drying time is 12 hours), and form it. A disc-shaped cellulose mass was obtained. Next, the block is taken out, placed in a tube furnace with nitrogen gas, heated to 800 degrees Celsius at a heating rate of 5° / m...

Embodiment 2

[0065] Embodiment 2, the preparation of porous carbon adsorbent

[0066] Measure 5g of magnesium nitrate, add it to 20ml of water and stir to dissolve at room temperature (25°C) to obtain a transparent and clear magnesium nitrate aqueous solution. Other experimental steps are the same as in Example 1 to obtain the porous carbon adsorbent of the present invention, which is named Mg-C-2 .

[0067] Characterization of the porous carbon adsorbent of the present invention: the surface morphology and pore structure of the porous carbon adsorbent after grinding and pulverization are observed under a scanning electron microscope, and the results are as follows: Figure 4 shown. Depend on Figure 4 (a) and Figure 4 (b) It can be seen that when the amount of magnesium nitrate is 5g, the pores of the prepared porous carbon adsorbent are more clearly visible, and the micron-sized macropores are all composed of stacked sheets, and these sheets are very thin, with a thickness of several...

Embodiment 3

[0070] Embodiment 3, the adsorption of porous carbon adsorbent to pentavalent arsenic

[0071] The arsenic source used in the experiment was Na 2 HASO 4 12H 2 O.

[0072] Take by weighing 10 mg of the porous carbon adsorbent obtained in Example 1 and Example 2 of the present invention respectively, then measure 25 ml of 10 ppm (mg / L) pentavalent arsenic solution, and vibrate at a constant temperature for 12 minutes in a shaker at 30 degrees Celsius and 300 revolutions. hours, filtered with a microporous membrane to obtain a clear solution, and analyzed the residual concentration of arsenic in the clear solution by an inductively coupled plasma-atomic emission spectrometer. As shown in Table 1, the content measurement results of the adsorption of arsenic ions in Examples 1 and 2 of the present invention are shown. Table 1 also shows the arsenic adsorption data of commercial activated carbon (AC) under the same conditions for comparison.

[0073] As can be seen from Table 1...

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Abstract

The invention discloses a porous carbon adsorbent as well as a preparation method and an application thereof. The active ingredients of the adsorbent refer to amorphous carbon and metallic oxides, wherein the mass ratio of the amorphous carbon to metallic oxides is (1-10):1. The preparation method comprises the following steps: dipping a natural high polymer material in a nitrate aqueous solution, drying, and carbonizing, thereby obtaining the porous carbon adsorbent. The porous carbon adsorbent disclosed by the invention has an excellent adsorption effect and has an effect of enhancing the adsorption effect on anionic inorganic pollutants. A natural and cheap high polymer material serves as a carbon source, can be conveniently processed into various shapes and is convenient to use; and in the test of low-concentration contaminated water samples, the adsorption effect of the porous carbon adsorbent is obviously superior to that of a commercial activated carbon adsorbent, straws, rice husk, coconut shells and other agricultural wastes can be utilized, the cost is low, and waste materials are changed into valuable things.

Description

technical field [0001] The invention relates to a porous carbon adsorbent and its preparation method and application, belonging to the field of adsorption materials. Background technique [0002] Drinking water safety is one of the most basic livelihood issues related to residents' health and life safety. Although my country is rich in surface water resources, ranking sixth in the world, the per capita share is only 1 / 4 of the world's average level. In addition, due to the uneven distribution of water resources in my country and the aggravation of water pollution, the qualified drinking water resources in some areas are very scarce. Limited, which will have an impact on people's normal life and economic development. The surface drinking water sources in many places have long been Class III-IV water bodies, and sometimes even fail to meet Class IV water quality standards. The problem of drinking water safety is particularly serious in rural areas and remote and underdevelope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20C02F1/28C02F101/20C02F101/14C02F101/12C02F101/10
Inventor 王春儒蒋礼蔡建华
Owner INST OF CHEM CHINESE ACAD OF SCI
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