A composite soil-based material and its use in preparing green planting soil from river and lake dredging mud

Abstract

The invention discloses a composite soil material and application of the composite soil material in preparation of greening planting soil from river and lake dredging mud. The composite soil materialcomprises the following components in parts by weight: main agents: 1-3 parts of cationic polyacrylamide, 4-6 parts of polyferric chloride, 20-40 parts of Portland cement, and 25-45 parts of modifiedfly ash and straw; and auxiliaries: 1-2 parts of calcium formate, 2-4 parts of polyglutamic acid and 2-3 parts of activated humic acid. The functions of dehydration reduction, heavy metal stabilization, strength improvement, soil structure and nutrient improvement and the like are integrated for the first time, and repeated technological operation during single implementation of traditional functions or functional compounding is avoided; and the final way-out problem of dredging mud treatment is solved in a resource utilization form of greening planting soil products, the use requirements of planting greening soil in surrounding areas are supplemented, the goal of returning non-point source pollution collected by river and lake dredging mud to soil in a stable form is achieved, and the invention has operable good application prospects.

Description

Technical field[0001]The invention belongs to the field of environmental waste treatment and resource utilization, and the treatment and application of dredging mud, and specifically, the use of a composite soil material and is used for the use of green planting soil for the preparation of green planting soil.Background technique[0002]In the water environmental governance project of the river lake, in order to remove the internal source pollution or recovery of river lake, a large number of dredged mud will inevitably produce a large amount of dredging mud. These high aqueous rates, there is almost no intensity of dredging slurry, and conventional abandoning methods are not only long-term occupied land, and there will be pollution risks such as nitrogen phosphorus nutrients and heavy metals such as peripheral water, soil environment. Solving the reduction of dredged mud, harmless and resourceping is already a top priority in the problem of resolving the environmental governance of r...

AI Technical Summary

Problems solved by technology

These high-moisture, fluid dredging muds have almost no strength. Conventional disposal methods not only occupy land for a long time, but also pose pollution risks such as nitrogen, phosphorus, nutrients, and heavy metals to the surrounding water bodies and soil environments.

Images