| 摘要 |
<p>Disclosed is a magnetic kieselguhr-based absorbent, a preparation method therefor and the application thereof. The kieselguhr is subjected to firstly a pre-treatment with a 1 to 10 percent hydrochloric acid solution, suction filtration and drying, a physical pre-modification by a plasma, soaking with a ferrous ion solution for modification, alkali addition for adjusting the pH value so as to generate a magnetic precursor, and then the magnetic kieselguhr-based absorbent is prepared after suction filtration, stoving, baking and grinding. The kieselguhr modified by the present invention not only has a remarkably improved adsorbability and a favourable adsorbability to substances difficult to degrade, but also has a greater magnetism, facilitating the solid-liquid separation after wastewater treatment and the reutilization of the kieselguhr.</p> |
