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Polyaniline modified bentonite nano-microsphere adsorption material and preparation method thereof

A technology of nano-microspheres and adsorption materials, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of increasing investment costs, no modification of bentonite, and increasing costs, and achieve the effect of improving filtration efficiency.

Active Publication Date: 2017-05-17
陕西龙宾立德新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Due to its good pore distribution and huge specific surface area, activated carbon materials have been widely used in the treatment of special sewage or sewage containing toxic organic substances that are difficult to treat with general methods, but there are two limitations in the use of modified adsorption materials : First, the cost is too high, that is, the cost of water treatment pollution is increased; second, its removal efficiency for heavy metal ions in water is low
However, the material mainly has the following problems in the modification research and application promotion: 1) solid-liquid separation is difficult
According to relevant research, the smaller the particle size of bentonite, the larger the specific surface area and surface tension, the higher the water treatment adsorption efficiency; but the smaller the particle size, the slower the sedimentation rate of the particles in the liquid, and the relative relative The greater the swelling (about 10%), both increase the cost of sedimentation, concentration and dehydration processes
Now there are two main ways to solve this problem, one is to add flocculant to the solid-liquid system; the other is to increase the filtration pressure, the former introduces secondary pollutants, and the latter increases the investment cost
2) Insufficient research on deep processing
At present, most researchers focus on the adsorption effect and industry of surface modifiers on bentonite for different sewage treatment. The bentonite raw materials used are traditional powder particles, and there is no combination of deep processing of raw materials and bentonite modification. sex studies
3) Introduce secondary pollution
After the bentonite adsorption material absorbs water and swells, it is in a flocculated state, and the material strength is extremely low. It will be broken during the stirring and desorption process. The cracked bentonite particle size is extremely slow, and it has to be removed by flocculants in water treatment. These particles; both organic flocculants and inorganic flocculants will dissolve in the water body, thus causing an increase in water treatment costs and introducing secondary pollution
4) Poor adsorption compatibility
There are various types of metal ions and harmful organic substances. There are related reports. When using bentonite to modify and adsorb metal ions or harmful organic substances, there is a modified and modified bentonite that can only effectively adsorb 1 to 2 kinds of harmful substances in water. Therefore, for Water bodies polluted by various harmful substances will use a variety of modified bentonites, which complicates the water treatment process and increases costs; this is one of the reasons why bentonite has never replaced activated carbon for water treatment

Method used

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  • Polyaniline modified bentonite nano-microsphere adsorption material and preparation method thereof
  • Polyaniline modified bentonite nano-microsphere adsorption material and preparation method thereof
  • Polyaniline modified bentonite nano-microsphere adsorption material and preparation method thereof

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Effect test

Embodiment 1

[0062] The first step, the organicization of bentonite and the preparation of aniline monomer intercalation:

[0063] Select 10% bentonite, add 75% distilled water, 0.02% surfactant cetyl trimethyl ammonium bromide, 11.7% sodium hydroxide, mix in a container; heat in a water bath at 40°C for 2 hours for immersion; then add 3.28% aniline, continue to heat to 60°C in a water bath, and stir for 4 hours to intercalate the aniline into the bentonite layer; obtain the aniline monomer intercalated organic bentonite.

[0064] The second step, the preparation of polyaniline modified bentonite nano-microsphere adsorption material:

[0065] Select 10% of the aniline monomer intercalated organic bentonite prepared in the first step of the present invention, add 80% of distilled water, 0.3% of emulsifier Span60, 9.68% of sodium hydroxide, mix in a container to prepare a suspended aqueous solution, After stirring and heating for a period of time, the initiator ferric trichloride 0.02% was ...

Embodiment 2

[0067] The first step, the organicization of bentonite and the preparation of aniline monomer intercalation:

[0068] Select 14.5% bentonite, add 65% distilled water, 0.04% surfactant cetyltrimethylammonium bromide, 14.5% sodium hydroxide, mix in a container; heat in a water bath at 42°C for 1.5h, and then immerse; then Add 5.96% aniline, continue heating in a water bath to 62°C, and stir for 3.2 hours to intercalate aniline into the bentonite layer; obtain aniline monomer intercalated organic bentonite.

[0069] The second step, the preparation of polyaniline modified bentonite nano-microsphere adsorption material:

[0070] Select 16% of the aniline monomer intercalated organic bentonite prepared in the first step of the present invention, add 72% of distilled water, 0.4% of emulsifier Span60, 11.56% of sodium hydroxide, mix in a container to prepare a suspended aqueous solution, After stirring and heating for a period of time, the initiator ferric trichloride 0.06% was adde...

Embodiment 3

[0072] The first step, the organicization of bentonite and the preparation of aniline monomer intercalation:

[0073] Select 20% bentonite, add 60% distilled water, 0.06% surfactant cetyl trimethyl ammonium bromide, 12.4% sodium hydroxide, mix in a container; heat in a water bath at 50°C for 1 hour for immersion; then add 7.54% aniline was heated to 70°C in a water bath, and stirred for 2 hours to intercalate the aniline into the bentonite layer; the aniline monomer intercalated organic bentonite was obtained.

[0074] The second step, the preparation of polyaniline modified bentonite nano-microsphere adsorption material:

[0075] Select 10% of the aniline monomer intercalated organic bentonite prepared in the first step of the present invention, add 80% of distilled water, 0.3% of emulsifier Span60, 9.68% of sodium hydroxide, mix in a container to prepare a suspended aqueous solution, After stirring and heating for a period of time, the initiator ferric trichloride 0.02% was...

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Abstract

The invention discloses a polyaniline modified bentonite nano-microsphere adsorption material. The material is prepared from the following raw materials in percentage by weight: 10 to 20% of aniline monomer intercalated organic bentonite, 60 to 80% of distilled water, 9 to 15% of sodium hydroxide, 0.02% to 0.06% of an initiator, and 0.3% to 0.5% of an emulsifier. The invention further provides a method for manufacturing the polyaniline modified bentonite nano-microsphere adsorption material. The polyaniline modified bentonite nano-microsphere adsorption material which is low in cost, high in compatibility, environment-friendly, and easy in solid-liquid separation and has nanometer size effects is prepared and synthesized through specific formula design and process parameter selection, and further larger in specific surface area and smaller in nanometer scale and has the functional properties of synergistically adsorbing double-pollution components of metal ions and organic matters in wastewater.

Description

technical field [0001] The invention relates to a novel bentonite adsorption material and a preparation process thereof, in particular to a polyaniline modified bentonite nanometer microsphere adsorption material and a preparation method thereof. Background technique [0002] Adsorption is a general method for removing soluble heavy metal ions and organic matter from polluted water, which is achieved by adsorbing materials. At present, the commonly used inorganic adsorption materials are mainly activated carbon and clay minerals. [0003] Because of its good pore distribution and huge specific surface area, activated carbon materials have been widely used in the treatment of special sewage or sewage containing toxic organics that are difficult to treat by general methods, but there are two limitations in the use of modified adsorption materials. : First, the cost is too high, that is, the cost of water treatment pollution is increased; second, the removal efficiency of heav...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/26
CPCB01J20/12B01J20/262B01J20/28007B01J20/28019B01J2220/4812B01J2220/4806
Inventor 彭龙贵
Owner 陕西龙宾立德新材料科技有限公司
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