11-04-2023 дата публикации
Номер: CN115945165A
Принадлежит:
The invention discloses a preparation method of a gangue-based arsenic adsorbent, which comprises the following steps: S1, placing a gangue sample in a ball mill for ball-milling activation treatment to obtain ball-milled gangue; s2, mixing the ball-milled coal gangue with a FeSO4. 7H2O solution to obtain a mixed solution; s3, adding a NaOH solution into the mixed solution to adjust the pH value of the mixed solution, and performing stirring treatment through a magnetic stirrer; s4, H2O2 is added into the solution obtained in the step 3, then stirring, filtering and taking out are conducted, solid sediment is obtained, the solid sediment is washed, dried and taken out, and the gangue-based arsenic adsorbent is obtained.According to the method, coal gangue and the FeSO4. 7H2O solution are mixed, the NaOH solution and the hydrogen peroxide serve as a pH value regulator and an oxidizing agent respectively, goethite is mixed with the FeSO4. 7H2O solution, then the mixture is stirred, filtered ...
Подробнее