A kind of soil oxidation-solidification stabilization repair agent and its application method

Abstract

The invention provides a soil oxidization-solidification and stabilization remediation agent and an application method of the soil oxidization-solidification and stabilization remediation agent. The soil oxidization-solidification and stabilization remediation agent comprises zero-valent iron, silicate and calcium oxide, wherein zero-valent iron, silicate and calcium oxide are independently packaged. By means of the process of activation of molecular oxygen in zero-valent and a disilicate system, oxidizing removal of organic matter in contaminated soil is achieved, and the interference of the organic matter to the soil solidification and stabilization process is reduced. Meanwhile, the mobility of reducing substances possibly existing in heavy metal contaminated soil, such as arsenious acid groups, selenious acid groups and sulfur ions is greatly reduced through oxidization. Then calcium oxide / calcium hydroxide is added, and stabilization and immobilization of heavy metal ions such as copper, lead, cadmium and mercury are achieved through iron minerals formed by residual zero-valent iron and calcium silicate compounds. The soil oxidization-solidification and stabilization remediation agent can conduct oxidization-solidification and stabilization on the heavy metal contaminated soil or organic matter and heavy metal combined contaminated soil with different contamination degrees, and products formed after solidification and stabilization can be used for backfilling or other purposes.

Description

technical field

[0001] The invention belongs to the field of environmental technology, and in particular relates to a soil oxidation-solidification stabilization and restoration agent and a use method thereof. Background technique

[0002] With the acceleration of our country's industrialization process, the rapid development of industry has improved the material and cultural living standards of human beings on the one hand, and caused serious pollution to the environment on the other hand. Soil heavy metal pollution is a major problem of environmental pollution. Soil is an important part of the ecological environment and one of the most precious resources for human survival. Its regeneration is extremely slow. Due to domestic sewage discharge, polluted irrigation, atmospheric deposition, mining and smelting, and extensive use of pesticides and fertilizers, soil pollution, especially heavy metal pollution, is becoming more and more serious. The heavy metals entering the so...

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