| 摘要 |
A soil smoldering method for remediation of heavy-metal co-contaminated soil mainly comprises the following steps: plant stalks are covered with soil to form a covered body; the outer layer is a soil layer, and the stalks or a mixture of stalks and soil are arranged inside, causing the inside to be in an anaerobic state; the soil smoldering treatment is then carried out. Through solidification, absorption, chelation, complexation and other various reactions, treatment by the present method achieves a reduction in the proportion of chemical forms of heavy metals that can easily migrate and diffuse into the environment, and an increase in the proportion of chemical forms which are difficult to release into the environment. Therefore, environmental and ecological risks from heavy metals are reduced. |
