| abstract |
The invention discloses a method for preparing a sulfide-modified zero-valent iron composite material, which comprises the following steps: (1) mixing pyrite and zero-valent iron in a certain mass ratio and placing them in a ball mill; 3‑12mm ball milling beads are evenly mixed with pyrite and zero-valent iron, without additives and atmosphere, directly dry ball milling; (3) Set the ball milling speed to 200‑800rpm, each ball milling 5‑10min, pause for the same time, Change the direction of the ball mill, and cycle 3-6 times in sequence; (4) pass through a 100-200 mesh screen after the ball mill is finished, and collect the vulcanized modified zero-valent iron composite material and store it in a desiccator. The method disclosed by the invention has simple preparation process and low cost, has enhanced removal effect on heavy metals and chlorinated organic pollutants in waste water, and has large-scale production and engineering application prospects. |