Heavy metal contaminated soil remediation method

Abstract

The invention discloses a heavy metal contaminated soil remediation method comprising the steps of adding alkaline pH conditioning agents to heavy metal contaminated soil, and then plowing; ditching on plowed soil, applying enzymatic biological organic fertilizer, calcium magnesium phosphate fertilizer, silicon calcium fertilizer, urea and potassium chloride to the bottoms of the ditches, fillingsoil to cover the fertilizer, and then planting sugarcane seedlings; additionally applying the urea, phosphate fertilizer and potassium sulphate after entering the sugarcane tillering and jointing stage; after the sugarcane of the current year matures, harvesting the overground part of the sugarcane of the current year, reserving the underground part of the sugarcane, and then planting the sugarcane of the next year; ditching on both sides of the underground part of the sugarcane, applying the enzymatic biological organic fertilizer, the calcium magnesium phosphate fertilizer, the silicon calcium fertilizer, the urea and the potassium chloride; and after the sugarcane of the next year matures, repeating the planting scheme of the sugarcane of the next year for planting the sugarcane of thethird year. By adopting the remediation method disclosed by the invention, the remediation effect of the heavy metal contaminated soil can be improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating heavy metal polluted soil. Background technique [0002] In the process of non-ferrous metal mining, metal smelting and processing in our country in the last century, affected by multiple factors such as social economy, production technology, environmental awareness, pollution control technology and practical understanding, random mining waste (stone) appeared. Stacking, ore dressing tailings pond dam breaches and waste residues are scattered along river canals (irrigation canals) along the banks of floods, waste water from pit mouths and tailings ponds overflows, and even enters farmland through irrigation canals; waste residues from smelters are dumped into depressions and storage yards at will, which is not up to standard Industrial wastewater is discharged to the surface and underground water bodies randomly, and non-standard flue gas is disc...

AI Technical Summary

Problems solved by technology

However, practice has shown that these enrichment plants and hyper-accumulation plants, such as dandelion, centipede grass, asplenium fern, etc., generally have short plants, low biomass per unit area, shallow root action on the soil layer, and poor governance effects. satisfactory