| 内容提要: |
Due to the high sorption capacity for heavy metals, magnetic biochar (MBC) has the potential to adsorb heavy metals in soils, which are then removed together with MBC from soils by a magnetic field. However, little research on the magnetic particle (MP) proportion and the addition amount of MBC. In this study, different magnetic particle proportion and addition amount of MBC were evaluated by a batch experiment. The most suitable MP proportion of MBC was 0.2 mol/L Fe2+, under this MP proportion, the extraction rates of Pb and Cd were 42.9% and 37.2%, respectively. The most suitable addition amount was 2.5% under low pollution condition, and 7.5% under severe pollution condition. |