A kind of polyaniline modified bentonite nano microsphere adsorption material and preparation method thereof

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 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 to remove soluble heavy metal ions and organic matter in polluted water, which is realized by adsorption materials. At present, the commonly used inorganic adsorption materials mainly include activated carbon and clay ore. [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 The first is that the cost is too high, that is, the cost of water treatment pollution is increased; the second is that its removal ef...

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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

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