Metal mining area contaminated soil remediation agent capable of improving plant growth

Abstract

The invention discloses a metal mining area contaminated soil remediation agent capable of improving plant growth. The remediation agent is prepared from the following six ingredients of mineral humic acid, attapulgite, coal ash, polyglutamic acid, ground phosphate rock and microorganism organic fertilizer. When the remediation agent is utilized to process contaminated soil, the remediation agent and the mining area contaminated soil are fully mixed according to the weight ratio of (1 to 2) : 1000, then appropriate water is added to wet, and plants are cultivated after the remediation agent and the mining area contaminated soil are fully mixed. The soil remediation agent can fix heavy metal ions in soil through heavy metal adsorption property of the mining humic acid, the attapulgite and the coal ash and a chelating effect of the polyglutamic acid and can prevent the heavy metal ions from migrating through leaching and runoff. On one hand, the humic acid, the ground phosphate rock and the microorganism organic fertilizer are utilized to regulate absorption of plants to soil heavy metal to improve moisture and fertilizer retention property of soil. According to the metal mining area contaminated soil remediation agent disclosed by the invention, a lot of mineral materials are chosen and matched, so that product cost is low; the metal mining area contaminated soil remediation agent can improve survival, growth and development of mining area plants in a dry condition and especially is suitable for quick greening and restoring engineering of high-concentration heavy metal polluted soil with an obvious toxic effect on plants.

Description

technical field [0001] The invention belongs to the technical field of remediation of polluted soil in metal mining areas, in particular to the formula of a remediation agent for heavy metal polluted soil. Background technique [0002] Mineral resources are an important material basis for human survival and development. The mining of mineral resources is considered to be the largest organized human production activity that has changed the earth's surface landscape and destroyed the surface ecological vegetation system so far. During mining, the topsoil and vegetation in the mining area are often destroyed beyond recognition, and the overall ecosystem is damaged. On average, land damage caused by floods, landslides, mudslides and other disasters every year often requires a lot of manpower and financial resources to manage. In addition to the destruction of topsoil and vegetation, there are also a series of complex and diverse environmental safety issues such as the deteriorat...

AI Technical Summary

Problems solved by technology

However, because heavy metals in the soil are toxic to many plants, they often affect the survival and growth of plants, thus hindering the process of remediation of high-concentration heavy metal-contaminated soil by plants.