Method for preparing attapulgite adsorbent particles

A technology of attapulgite and adsorption particles, which is applied in the field of preparation of attapulgite adsorption particles, which can solve the problems of high cost, easy saturation of adsorption, high operating cost, etc., and achieve the advantages of increased interlayer gaps, enhanced adsorption, and low processing costs Effect

Inactive Publication Date: 2017-07-14
MINGGUANG GUOXING ATTAPULGITE CLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current heavy metal treatment methods mainly include chemical precipitation, solvent extraction, ion exchange, membrane separation, activated carbon and silica gel adsorption, etc. Among them, the chemical precipitation method is the most widely used, but for low-concentration wastewater, the chemical precipitation method has large investment and operation. High cost and easy to produce secondary pollution problems
The adsorption method has become the focus of research because of its cheap and easy-to-obtain materials, low cost and good removal effect. At present, the most commonly used adsorbent at home and abroad is activated carbon, but activated carbon has the problems of high cost, easy adsorption saturation and difficult regeneration. Alternatives to activated carbon have received attention in the field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing attapulgite adsorption particles, characterized in that it comprises the following steps:

[0031] (1) Purification of attapulgite: Grinding attapulgite to obtain powdered attapulgite, adding distilled water to make a suspension slurry, and then adding a dispersant for dispersion treatment. The dispersion treatment time is 5 minutes, discard the lower layer of sediment, and keep the upper layer Centrifuge the suspension at a speed of 2000r / min, centrifuge for 20 minutes, keep the sediment, and transfer it to a beaker for later use;

[0032] (2) The first modification of attapulgite: grind attapulgite, add the obtained attapulgite powder into the alkali solution, heat in a water bath to 82°C, stir at 900r / min for 0.5h, filter, and use up the filter residue Wash with deionized water until neutral, dry, pulverize, pass through a 100-mesh sieve, and set aside;

[0033] (3) The second modification of attapulgite: Add the attapulgite powder obtained in...

Embodiment 2

[0049] A method for preparing attapulgite adsorption particles, comprising the steps of:

[0050] (1) Purification of attapulgite: grind attapulgite to obtain powdered attapulgite, add distilled water to make suspension slurry, then add dispersant for dispersion treatment, the dispersion treatment time is 12min, discard the lower layer of sediment, keep the upper layer Centrifuge the suspension at a speed of 3000r / min, centrifuge for 25 minutes, keep the sediment, and transfer it to a beaker for later use;

[0051] (2) The first modification of attapulgite: grind attapulgite, add the obtained attapulgite powder into the alkali solution, heat it in a water bath to 85°C, stir at 1000r / min for 1h, filter, and deionize the filter residue Wash with water until neutral, dry, pulverize, pass through a 150-mesh sieve, and set aside;

[0052] (3) The second modification of attapulgite: add the attapulgite powder obtained in step (2) into the mixed solution of organic solvent and threo...

Embodiment 3

[0068] A method for preparing attapulgite adsorption particles, comprising the steps of:

[0069] (1) Purification of attapulgite: Grinding attapulgite to obtain powdered attapulgite, adding distilled water to make a suspension slurry, and then adding a dispersant for dispersion treatment. The dispersion treatment time is 8 minutes, discard the lower layer of sediment, and keep the upper layer The suspension was centrifuged at a controlled speed of 2500r / min, and the centrifugation time was 22min. The sediment was retained and transferred to a beaker for later use;

[0070] (2) The first modification of attapulgite: Grind attapulgite, add the obtained attapulgite powder into the alkali solution, heat in a water bath to 83°C, stir at 950r / min for 1h, filter, and deionize the filter residue Wash with water until neutral, dry, pulverize, pass through a 125-mesh sieve, and set aside;

[0071] (3) The second modification of attapulgite: add the attapulgite powder obtained in step ...

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PUM

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Abstract

The invention discloses a method for preparing attapulgite adsorbent particles and relates to the technical field of processing of attapulgite. The method comprises the following steps: (1) purifying the attapulgite; (2) carrying out first-time modification on the attapulgite; (3) carrying out second-time modification on the attapulgite; (4) carrying out high-temperature calcination; (5) preparing a functional aqua; (6) preparing a surfactant solution; and (7) carrying out mixing. According to the method, the process is simple and does not cause secondary pollution, and the prepared attapulgite adsorbent particles have the characteristics of large particle size, good adsorption performance and high strength.

Description

technical field [0001] The invention relates to the technical field of attapulgite processing, in particular to a method for preparing attapulgite adsorption particles. Background technique [0002] Heavy metal ion wastewater is one of the three major water pollution methods in the world today. These heavy metal ion wastewater cannot be biodegraded after entering the environment. If they accumulate to a certain limit in the water body, they will cause serious harm to the water body-aquatic plant-aquatic animal system, and It can affect the health of human beings through the food chain. The current heavy metal treatment methods mainly include chemical precipitation, solvent extraction, ion exchange, membrane separation, activated carbon and silica gel adsorption, etc. Among them, the chemical precipitation method is the most widely used, but for low-concentration wastewater, the chemical precipitation method has large investment and operation. High cost and easy to produce s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12C02F1/28B01J20/30C02F101/20
Inventor 李振国
Owner MINGGUANG GUOXING ATTAPULGITE CLAY
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