Control and ecological remediation method for soil heavy metal contamination

Abstract

The invention discloses a control and ecological remediation method for soil heavy metal contamination. The control and ecological remediation method comprises the following specific steps: 1, preparing a matrix; 2, inoculating with bacteria; 3, preparing bioactive heavy metal particle converters; 4, landfilling the bioactive heavy metal particle converters; 5, performing control and ecological remediation on the soil heavy metal contamination; 6, taking out pennisetum sinese roots. Through combination of the bioactive heavy metal particle converters at the pennisetum sinese roots and pennisetum sinese itself, heavy metals in contaminated soil are fixedly converted, the ecological environment in the soil is improved, and the purpose of contamination control is achieved.

Description

technical field [0001] The invention belongs to the technical field of soil pollution treatment, and in particular relates to a treatment and ecological restoration method for soil heavy metal pollution. Background technique [0002] With the rapid development of industry and agriculture in my country in recent years, soil heavy metal pollution has become increasingly serious. According to the data of the Ministry of Land and Resources, more than 10% of the cultivated land in my country is polluted by heavy metals, about 150 million mu. In some developed regions, 50% of the cultivated land is polluted, and 10% of the land is severely polluted, basically losing productivity. [0003] At present, the methods of soil pollution control mainly include: 1. Physical treatment method, which uses foreign soil to physically remove polluted soil; the advantage is that the effect is obvious, and the disadvantage is that the original polluted soil will cause secondary pollution, and the...

AI Technical Summary

Problems solved by technology

In some developed areas, 50% of the cultivated land is polluted, and 10% of the land is severely polluted, basically losing productivity

[0003] At present, the methods of soil pollution control mainly include: 1. Physical treatment method, which uses foreign soil to physically remove polluted soil; the advantage is that the effect is obvious, and the disadvantage is that the original polluted soil will cause secondary pollution, and the project cost is high

2. The chemical treatment method is to put amendments and inhibitors into the polluted soil, improve the soil organic matter, change the soil PH value and electrical conductivity and other characteristics, and make the heavy metals in the soil undergo oxidation-reduction reactions; the advantage is that the treatment effect and cost are moderate, and the disadvantage is that The activity of heavy metals is easy to reactivate and cause pollution again

3. Agricultural management method, planting crops that are not edible; the advantage is that it is easy to operate and the cost is low, and the disadvantage is that the treatment cycle is long and the effect is poor

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