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A kind of preparation method of organically modified attapulgite adsorbent

A technology of attapulgite and attapulgite powder is applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., to achieve the effects of simple and easy modification route, low energy consumption and low price

Active Publication Date: 2015-09-16
HEFEI UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to provide a method for preparing an organically modified attapulgite adsorbent, and the technical problem to be solved is to improve its adsorption capacity for organic pollutants by improving the organophilicity of attapulgite

Method used

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  • A kind of preparation method of organically modified attapulgite adsorbent
  • A kind of preparation method of organically modified attapulgite adsorbent
  • A kind of preparation method of organically modified attapulgite adsorbent

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Effect test

Embodiment 1

[0022] Pulverize attapulgite clay raw ore with attapulgite content ≥ 98wt%, and pass through a 200-mesh sieve to obtain attapulgite powder, take 2.5g attapulgite powder and 5g cellulose, mix in 72ml distilled water, and then add ferrous ammonium sulfate 2.8g, ultrasonically dispersed to obtain a mixed solution, and the pH of the mixed solution was 5 at this time;

[0023] Transfer the mixed solution to a polytetrafluoroethylene hydrothermal tank, keep the filling rate at 75%, and carbonize for 12 hours at a reaction temperature of 250°C; after the reaction is completed, it is naturally cooled to room temperature, centrifuged and washed alternately with water and ethanol. The black product obtained by drying at 60°C is the organically modified attapulgite.

[0024] SEM and infrared spectroscopic analysis showed that the surface of attapulgite supported nano-carbons containing organic functional groups such as C-H.

[0025] Take the phenol solution with an initial concentration...

Embodiment 2

[0027] Pulverize attapulgite clay raw ore with attapulgite content ≥ 98wt%, and pass through a 200-mesh sieve to obtain attapulgite powder, take 2.5g attapulgite powder and 5g cellulose, mix in 72ml distilled water, and then add ferrous ammonium sulfate 2.8g, ultrasonically dispersed to obtain a mixed solution, and the pH of the mixed solution was 5 at this time;

[0028] Transfer the mixed solution to a polytetrafluoroethylene hydrothermal tank, keep the filling rate at 80%, and carbonize for 12 hours at a reaction temperature of 240°C; after the reaction is completed, it is naturally cooled to room temperature, centrifuged and washed alternately with water and ethanol. The black product obtained by drying at 60°C is the organically modified attapulgite.

[0029] Infrared analysis shows that organically modified attapulgite contains organic functional groups such as C-H; SEM analysis shows that amorphous carbon is loaded on attapulgite (see figure 1 ).

[0030] Take the phe...

Embodiment 3

[0032] Pulverize attapulgite clay raw ore with attapulgite content ≥ 98wt%, and pass through a 200-mesh sieve to obtain attapulgite powder, take 2.5g attapulgite powder and 10g cellulose, mix in 72ml distilled water, and then add ferrous ammonium sulfate 3.0g, ultrasonically dispersed to obtain a mixed solution, and the pH of the mixed solution was 5 at this time;

[0033] The mixed solution was transferred to a polytetrafluoroethylene hydrothermal kettle, the filling rate was kept at 80%, the reaction temperature was 250°C, and carbonization was carried out for 48 hours; after the reaction was completed, it was naturally cooled to room temperature, centrifuged and washed alternately with water and ethanol, and then placed in The black product obtained by drying at 60°C is the organically modified attapulgite.

[0034] Infrared analysis shows that the organically modified attapulgite contains organic functional groups such as C-H. SEM characterization revealed that amorphous ...

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Abstract

The invention discloses a method for preparing an organic modified attapulgite adsorbent. An attapulgite or carbon nano composite material is prepared from cheap natural attapulgite clay and a biomass cellulose carbon source by a heterogeneous hydro-thermal synthesis method, so that organophilic amorphous carbon with a -CH functional group is loaded on the surfaces of attapulgite crystals. Compared with the natural non-modified attapulgite clay, the organic modified attapulgite adsorbent has the advantages that the removal rate to organic pollutants can be improved by more than 3 to 5 times, and the removal rate to methylene blue in water is 97 to 99 percent; and the adsorption balance time for the methylene blue is greatly shortened. The organic modification condition of attapulgite is mild; raw materials are readily available and are low in cost; the technical process is simple; the organic functional group is grafted to the surface of the modified attapulgite, so that the capacity of adsorbing the organic pollutants in water is obviously improved; and the organic modified attapulgite adsorbent can be used for deep treatment of the organic pollutants in water.

Description

1. Technical field [0001] The invention relates to an organic modification method of an attapulgite adsorbent, which is used to improve the adsorption capacity of attapulgite as an adsorbent for organic pollutants, and is applied to the removal of trace organic pollutants in water bodies. 2. Background technology [0002] Attapulgite is a cheap and abundant magnesium aluminum silicate clay mineral with a chain layer structure. Its single crystal diameter is 30-50nm, has a huge specific surface area, and exhibits nano-effects, adsorption activity and chemical activity. It is a natural nano-mineral material with excellent performance. There are three types of water in attapulgite: structural water, crystallization water and zeolite water. The crystal water in the attapulgite structure is located on the surface of its pores, and it is easy to form hydrogen bonds with the adsorbate entering the pores. Therefore, when used as an adsorbent, attapulgite has weak adsorption of org...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
Inventor 吴雪平徐艳青高鹏张先龙
Owner HEFEI UNIV OF TECH
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