Organic modification method for attapulgite stone and uses of organic modified attapulgite stone

A technology of attapulgite and attapulgite clay, applied in chemical instruments and methods, inorganic chemistry, adsorption water/sewage treatment, etc., can solve problems such as increased industrial costs, complicated experimental operations, complex systems, etc., and achieves organophilicity Improved effect

Inactive Publication Date: 2009-07-29
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the common problems of these methods are: high cost, long period, complex system, and even secondary pollution caused by by-products
However, heat treatment requires a higher calcination temperature of 700 ° C, requires atmosphere protection, complicated experimental operations, and increased industrial costs

Method used

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  • Organic modification method for attapulgite stone and uses of organic modified attapulgite stone
  • Organic modification method for attapulgite stone and uses of organic modified attapulgite stone
  • Organic modification method for attapulgite stone and uses of organic modified attapulgite stone

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Experimental program
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Effect test

Embodiment 1

[0023] Take 1 g of attapulgite clay and 1 g of glucose, mix them in 100 ml of distilled water, and ultrasonically disperse for 30 minutes, while adjusting the pH of the solution to 9 with NaOH. The uniformly dispersed mixed solution was transferred to a polytetrafluoroethylene hydrothermal kettle, and the filling rate was maintained at 80%. The reaction temperature was 180°C, and the carbonization was carried out for 48 hours. After the reaction, the product was naturally cooled to room temperature, the collected product was centrifuged, washed alternately with water and ethanol, and dried at 100°C to obtain a black product. Elemental analysis gave a carbon content of 14%. Infrared analysis shows that attapulgite / carbon composites contain organic functional groups such as C-H, such as figure 2 In the curve a, the product morphology is characterized by TEM (such as Figure 1A shown), it was found that amorphous carbon was supported on attapulgite.

Embodiment 2

[0025] Take 1 g of attapulgite clay and 2 g of glucose, mix them in 100 ml of distilled water, and disperse them ultrasonically, while adjusting the pH of the solution to 7 with NaOH. The uniformly dispersed mixed solution was transferred to a polytetrafluoroethylene hydrothermal kettle, and the filling rate was kept at 75%. The reaction temperature was 160°C, and the carbonization was carried out for 12 hours. After the reaction, the product was naturally cooled to room temperature, collected and centrifuged, washed alternately with water and ethanol, and dried at 80°C to obtain a tan product. Infrared analysis shows that attapulgite / carbon composites contain organic functional groups such as C-H, such as figure 2 Middle curve b. Product morphology was characterized by TEM (such as Figure 1B shown), it was found that amorphous carbon was supported on attapulgite.

Embodiment 3

[0027] Take 1 g of attapulgite clay and 4 g of glucose, mix them in 100 ml of distilled water, and disperse them ultrasonically. The initial pH value of the solution was 6.8, and the uniformly dispersed mixed solution was transferred to a polytetrafluoroethylene hydrothermal kettle, and the filling rate was maintained at 80%. The reaction temperature was 180°C, and the carbonization was carried out for 48 hours. After the reaction, the product was naturally cooled to room temperature, collected and centrifuged, washed alternately with water and ethanol, and dried at 90°C to obtain a black product. Elemental analysis gave a carbon content of 21%. Infrared analysis shows that attapulgite / carbon composites contain organic functional groups such as C-H, such as figure 2 Shown in curve c. The product morphology is characterized by SEM as Figure 1C As shown, it was found that amorphous carbon was supported on attapulgite.

[0028] figure 2 The middle curve d is the infrared...

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Abstract

The invention discloses a method for organically modifying attapulgite, which is characterized in that: attapulgite clay and glucose are taken as raw materials to prepare an attapulgite / carbon nano composite material by a hydro-thermal method, and the composite material is to load 10 to 20 mass percent amorphous carbon containing -CH functional groups on the surface of an attapulgite crystal. The surface of the material is rich in the -CH functional groups, and has organophile property. Compared with attapulgite green ore, the composite material improves the rate for removing organic pollutant phenol in wastewater by more than 2 to 3 times. The method has mild conditions for organically modifying the attapulgite and simple process; and the obtained attapulgite contains hydrocarbon functional groups, has higher capacity of adsorbing the organic pollutants such as the phenol in water, and can be used for advanced treatment on the organic pollutants in the water or organic advanced processing and treatment on the attapulgite.

Description

technical field [0001] The invention relates to a method for organically modifying attapulgite, more specifically to a method for organically modifying attapulgite for removing organic pollutants. Background technique [0002] At present, water pollution is one of the urgent problems faced by countries all over the world. my country's annual sewage discharge reaches 40 billion tons, of which organic matter polluted wastewater accounts for a large proportion, and more than 2,000 kinds of organic matter have been detected in raw water. Organic pollutants exist in water for a long time, with a wide range and great harm. Its conventional treatment methods mainly include ozonation treatment, activated carbon adsorption, membrane separation technology, biological treatment technology, potassium permanganate oxidation method, etc. However, these methods have common problems: high cost, long period, complex system, and even secondary pollution caused by by-products. It has become...

Claims

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Application Information

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IPC IPC(8): C01B33/40C02F1/28C02F101/34
Inventor 吴雪平张先龙陈天虎盛丽华蒋欣源
Owner HEFEI UNIV OF TECH
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