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
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[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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