Preparation method of polyaniline /attapulgite/zero valent iron composite material

A technology of composite materials and polyaniline, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve the problems of easy agglomeration and passivation of iron powder particles, and achieve low-cost and easy-to-obtain , Improve the utilization rate, and the treatment effect is good

Inactive Publication Date: 2013-10-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the iron powder particles are easy to agglomerate and the surface is easy to passivate

Method used

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  • Preparation method of polyaniline /attapulgite/zero valent iron composite material
  • Preparation method of polyaniline /attapulgite/zero valent iron composite material

Examples

Experimental program
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preparation example Construction

[0018] The preparation method of polyaniline / attapulgite / zero-valent iron composite material, its step is:

[0019] (1) Add attapulgite to 0.1-0.5mol / L acid solution, stir and disperse for 0.5h;

[0020] (2) Add aniline with 5%-35% of the mass of attapulgite, and stir for 0.5h;

[0021] (3) Add ammonium persulfate with 15-25% of the mass of attapulgite as an initiator, stir and let stand for 0.5h;

[0022] (4) Add iron powder with 25-100% mass of attapulgite, stir and disperse for 0.5h;

[0023] (5) Suction filtration to neutrality, drying at 60°C, and grinding to obtain a composite material.

[0024] The mass percentages of attapulgite, iron powder and aniline are: attapulgite 25-50%, iron powder 25-50%, aniline 5-11%.

[0025] above The attapulgite used is pure soil; the attapulgite is prepared into a 0.01-0.03% suspension solution; the particle size of the iron powder is 200-350 mesh; the acid used is hydrochloric acid, or nitric acid, or sulfuric acid, or the above-me...

Embodiment 1

[0028] Example 1: The preparation temperature is 0°C, weigh 2.0g attapulgite, add 0.5mol / L nitric acid 77mL and stir for 0.5h, add 0.6mL aniline and stir for 0.5h, add 2.0g ammonium persulfate, stir and let stand for 0.5h . Add 2.0 g of 350 mesh iron powder. Stir for 0.5 hr, filter until neutral, dry at 60°C, and grind to obtain dark green Fe / PANI / ATP composite material. Such as figure 2 As shown, when the composite material is at pH=3, the adsorption capacity of Cr(Ⅵ) reaches 75.13mg / g. Such as figure 1 Shown is the scanning electron microscope picture of the product that makes.

Embodiment 2

[0029] Example 2: The preparation temperature is 0°C, weigh 2.0g attapulgite, add 0.5mol / L nitric acid 77mL and stir for 0.5h, add 0.5mL aniline and stir for 0.5h, add 2.0g ammonium persulfate, stir and let stand for 0.5h . Add 2.0 g of 320 mesh iron powder. Stir for 0.5 hr, filter until neutral, dry at 60°C, and grind to obtain dark green Fe / PANI / ATP composite material. Such as figure 2 As shown, when the composite material is at pH=3, the adsorption capacity of Cr(Ⅵ) reaches 71.37mg / g.

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Abstract

The invention provides a preparation method of a polyaniline / attapulgite / zero valent iron composite material. The preparation method is aimed at solving the problems that iron powder granules are liable to aggregate and the surfaces are liable to passivate. The preparation method comprises the following steps: (1) adding 0.1-0.5 mol / L acid into a reaction container, wherein the mol ratio of the acid of the reaction solution is 0.1-0.5 mol / L; (2) adding the attapulgite clay to prepare a suspended solution; (3) adding aniline, and stirring to disperse the aniline; (4) adding ammonium persulfate to serve as an initiator, standing and polymerizing to form a viscous solution so as to disperse zero valent iron granules; and (5) carrying out suction filtering and drying to obtain the product.

Description

technical field [0001] The invention belongs to the field of environment-friendly adsorption materials, and in particular relates to a preparation method of a polyaniline / attapulgite / zero-valent iron composite material used for water treatment. Background technique [0002] Polyaniline (PANI) has a linear polymer chain containing a large number of amino groups and imino groups, and has a good complexation effect on heavy metal ions. Amino groups and imino groups are also reducing, and some heavy metal ions with high oxidation potential will undergo redox reactions. At the same time, polyaniline adsorbents have ion exchange functions for some metal ions, so polyaniline can be used as a new type of heavy metal ion capture. Collecting agent, but the cost is higher when used as an adsorbent. Attapulgite (ATP), also known as palygorskite or palygorskite, is a hydrous magnesium-rich silicate clay mineral with chain layer structure. The unique crystal structure makes attapulgite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/02C08K3/34C08K3/08B01J20/26B01J20/30C02F1/28C02F1/70C02F1/62
Inventor 徐惠陆海林陈泳吴军霞张宝骞
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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