Preparation method and application of stearic acid modified zero-valent iron composite material
A technology of composite materials and stearic acid, applied in the field of environmental chemistry, can solve the problems of hindering the contact of active ingredients, reducing the activity of zero-valent iron, and poor transmission, and achieve the effects of inhibiting cold welding, increasing fracturing rate, and low preparation cost
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[0034]Example 1
[0035]Use planetary ball mill to prepare SA-mZVIbm The steps are as follows: (1) Put 20% of the cavity volume of zirconia ball milling beads (with a diameter of 6mm) into the ball milling tank as the grinding medium; (2) Weigh 0.00125g stearic acid and 2.49875g zero-valent iron powder (hard The mass ratio of fatty acid to iron 1:2000) is placed in a ball mill tank and filled with argon; (3) the ball mill is turned on, the ball mill speed is adjusted to 400 rpm, and the ball mill is for 20 hours; (4) in a nitrogen atmosphere, Use a sieve to make SA-mZVIbm Separate from the grinding media to obtain SA-mZVIbm Finished product.
Example Embodiment
[0036]Example 2
[0037]Use planetary ball mill to prepare SA-mZVIbm , The steps are as follows: (1) Put 20% of the cavity volume of zirconia ball mill beads (with a diameter of 6mm) into the ball mill tank as the grinding medium; (2) Weigh 0.0025g stearic acid and 2.4975g zero-valent iron powder ( The mass ratio of stearic acid and iron is 1:1000) Put it in a ball mill tank and fill it with argon; (3) Turn on the ball mill, adjust the speed of the ball mill to 400rpm, and mill for 20 hours; (4) Under nitrogen atmosphere , The SA-mZVI obtained with a screenbm Separate from the grinding media to obtain SA-mZVIbm Finished product.
Example Embodiment
[0038]Example 3
[0039]Use planetary ball mill to prepare SA-mZVIbm , The steps are as follows: (1) Put 20% of the cavity volume of zirconia ball milling beads (with a diameter of 6mm) into the ball milling tank as a grinding medium; (2) Weigh 0.0125g stearic acid and 2.4875g zero-valent iron powder ( The mass ratio of stearic acid and iron is 1:200) placed in a ball mill tank and filled with argon gas; (3) turn on the ball mill, adjust the speed of the ball mill to 400rpm, and mill for 20 hours; (4) under a nitrogen atmosphere , The SA-mZVI obtained with a screenbm Separate from the grinding media to obtain SA-mZVIbm Finished product.
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