Method for adsorbing heavy metals in soil through plant-microorganism combination

Abstract

The invention relates to the technical field of soil repairing and discloses a method for adsorbing heavy metals in soil through plant-microorganism combination. The method is a plant-microorganism combined repairing technique with artemisia sacrorum as a plant material and VA (vesicular-arbuscular) fungi as a microorganism material. Soil of a part at a depth of 30cm under artemisia sacrorum is collected and screened to collect exposed VA fungal spores. A mixture of river mud and clay is added to a beef extract-peptone medium, and sterilization and disinfection are implemented. The obtained VAfungal spores are inoculated into the medium for culture. The artemisia sacrorum seeds are sterilized with a hydrogen peroxide solution and then soaked in warm water. The obtained VA fungi are inoculated into soil containing heavy metals, and are inoculated in multiple layers to ensure the inoculation amount of the spores, and the treated artemisia sacrorum seeds are put into the soil. As the artemisia sacrorum grows, the VA fungi can be formed. Compared with a conventional plant-microorganism combined repairing technique, the method has a good Cu adsorption effect which is up to 85%.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a plant-microorganism joint adsorption method for heavy metals in soil. Background technique [0002] At present, soil problems are gradually showing hazards, especially the problem of excessive heavy metal content in soil is becoming more and more serious, and excessive heavy metals in soil will cause many hazards. Since heavy metals cannot be degraded by microorganisms, heavy metals will remain in the soil for a long time and are difficult to handle. Long-term retention in the soil will affect the development of plant roots and leaves, infect groundwater, and affect human survival and health. However, the current treatment technology for heavy metals in soil is time-consuming, labor-intensive and expensive, while the method of using arbuscular fungi (VA fungi) in combination with plants to adsorb heavy metals in soil is low in cost and has obvious treatment effects on ...

AI Technical Summary

Problems solved by technology

[0002] At present, soil problems are gradually revealing hazards, especially the problem of excessive heavy metal content in soil is becoming more and more serious, and excessive heavy metals in soil will cause many hazards

Because heavy metals cannot be degraded by microorganisms, heavy metals will remain in the soil for a long time and are difficult to handle. Long-term retention in the soil will affect the development of plant roots and leaves, infect groundwater, and affect human survival and health.

However, the current treatment technology for heavy metals in soil is time-consuming, labor-intensive and expensive, and the method of using arbuscular fungi (VA fungi) to cooperate with plants to adsorb heavy metals in soil is low in cost and has obvious treatment effects on copper and lead.

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