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Preparation method for quaternary ammonium salt modified attapulgite for heavy metal adsorption

A technology of attapulgite clay and modified attapulgite, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of many impurities, agglomeration, etc., and achieve simple and non-standard preparation process Secondary pollution, long-term effective control effect

Inactive Publication Date: 2016-08-17
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

Attapulgite clay is a material widely used in the treatment of polluted groundwater and soil. Due to its strong electronegativity and reducing properties, it can react with various pollutants, such as chlorobenzenes and heavy metals. , so as to achieve the purpose of removing pollutants, but it also has the disadvantages of agglomeration and many impurities

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  • Preparation method for quaternary ammonium salt modified attapulgite for heavy metal adsorption
  • Preparation method for quaternary ammonium salt modified attapulgite for heavy metal adsorption
  • Preparation method for quaternary ammonium salt modified attapulgite for heavy metal adsorption

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Embodiment 1

[0019] A preparation method of quaternary ammonium salt modified attapulgite clay for heavy metal adsorption. The material takes attapulgite clay as the core and grafts with quaternary ammonium salt on the surface. The specific preparation steps are as follows: 10g attapulgite The clay raw soil was added to 100ml of 5% dilute hydrochloric acid, mechanically stirred to make it fully mixed, reacted for 48 hours, centrifuged, filtered, and then washed repeatedly with deionized water. Wash until neutral, and titrate with silver nitrate until no precipitation occurs, then dry at 110°C, and pass through a 200-mesh sieve to obtain coarsely purified attapulgite clay; weigh about 0.8g of dioctadecyl dimethyl Ammonium chloride, octadecyltrimethylammonium chloride and other quaternary ammonium salts were added to 80mL of absolute ethanol (analytical pure) solution, and mechanically stirred to make it fully mixed to obtain a quaternary ammonium salt solution; weigh about 8g of Roughly pur...

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Abstract

The invention relates to a preparation method for quaternary ammonium salt modified attapulgite for heavy metal adsorption. The attapulgite is taken as the core of the material and is grafted with the quaternary ammonium salt on the surface; in an absolute ethyl alcohol solution, the quaternary ammonium salt modified attapulgite is prepared through ultrasonic wave; the prepared quaternary ammonium salt modified attapulgite has better dispersibility and adsorbability and larger superficial area; more functional groups, such as amino, hydroxyl, are grafted; the functional groups are easily combined with the attapulgite and metal ions; the pollutants can be long-term efficiently controlled; when concentration of Pb<2+> is 100mg / L, the removal rate reaches 98.3%; when concentration of Cd<2+> is 100mg / L, the removal rate reaches 99.4%. The preparation method has the advantages of simple technique, no secondary pollution and excellent market potential.

Description

technical field [0001] This patent relates to the field of environmental protection materials, in particular to a preparation method of quaternary ammonium salt modified attapulgite. Background technique [0002] Heavy metal wastewater is a type of industrial wastewater. Wastewater containing heavy metals comes from a wide range of sources, such as non-ferrous metal industry, electroplating industry, mining industry, chemical industry, etc. The type, content and existing form of heavy metal ions in water vary with different production types. There are differences. Suspended particles in the water will adsorb metal ions and their compounds, and eventually accumulate in the bottom sediment layer, polluting the water body for a long time and causing serious environmental pollution. Certain heavy metals and their compounds can accumulate, accumulate and participate in the biosphere cycle in some aquatic organisms and fish tissues, and eventually accumulate in the human body, wh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/30C02F1/28C02F101/20
CPCB01J20/12C02F1/281C02F2101/20
Inventor 林爱军漆佳焦春磊闫旭刘畅
Owner BEIJING UNIV OF CHEM TECH
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