| abstract |
The invention belongs to the technical field of harmless treatment and utilization of agricultural wastes, and in particular relates to a composite restoration agent for heavy metal-contaminated soil produced by using agricultural sewage operation and maintenance wastes and a preparation method thereof. The present invention, in view of the problem of high treatment cost in the prior art, provides a composite remediation agent for heavy metal contaminated soil and a preparation method thereof, comprising 40-50 parts by mass of domestic sludge, 30-40 parts by mass respectively of crop waste and 20‑30 parts of modified fly ash. The main components of the invention are all derived from waste, the raw materials are readily available and the cost is low, and at the same time, the secondary utilization of the waste can be realized without secondary pollution. |