Method for repairing soil zinc and cadmium pollution with bamboo-willows

Abstract

The invention relates to the technical field of soil remediation, in particular to a method for repairing soil zinc and cadmium pollution with bamboo-willows. The method includes the following steps that A, the bamboo-willows are planted in polluted soil; and B, a biomass charcoal ameliorant is applied to the polluted soil. By the adoption of the method, the bamboo-willows and the biomass charcoal ameliorant are selected to be subjected to combined remediation, a good growing environment is provided for the bamboo-willows through the biomass charcoal ameliorant, the effect of facilitating root growth of the bamboo-willows is achieved and vital force of the bamboo-willows is enhanced; and the bamboo-willows can efficiently enrich heavy metal zinc and cadmium, zinc and cadmium polluted soil is repaired for one to two years under the dual functions of the bamboo-willows and the biomass charcoal ameliorant, the content of the heavy metal zinc and cadmium can be greatly reduced, and the purpose of completely repairing middle-level polluted soil can be achieved through three to six years. The method for repairing the soil zinc and cadmium pollution with the bamboo-willows is small in investment, low in technical requirement, low in planting difficulty, easy to manage, suitable for large-area polluted soil and good in soil treatment effect; and the social benefits, economic benefits and application and popularization value are good.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating zinc and cadmium pollution in soil by using bamboo willow. Background technique [0002] Soil is an important part of the self-heating ecosphere in which human beings live. With the rapid development of agriculture, industry and commerce, heavy metal pollution has seriously threatened the safety of the soil environment. Hazards of heavy metals: 1. The higher the content of heavy metals in the soil, the lower the microbial biomass and enzyme activity, which will affect the soil quality. 2. The heavy metal elements in the soil that have different effects on plants will not affect the normal growth of plants at a certain concentration, but when the concentration exceeds a certain limit, they will have toxic effects on plants, affect the yield and quality of plants, and even cause plant mutation or extinction. 3. The human nervous system and bone ...

AI Technical Summary

Problems solved by technology

Hazards of heavy metals: 1. The higher the content of heavy metals in the soil, the lower the microbial biomass and enzyme activity, which will affect the soil quality

2. The heavy metal elements in the soil that have different effects on plants will not affect the normal growth of plants at a certain concentration, but when the concentration exceeds a certain limit, they will have toxic effects on plants, affect the yield and quality of plants, and even cause plant mutation or extinction

The application number is 201310538655.X, and the invention patent titled "Using lawn grass to ecologically restore cadmium-contaminated soil" uses lawn grass bermudagrass to extract heavy metals from cadmium-contaminated soil; The invention patent of "method of soil ecological restoration in mining area" uses animal manure to improve soil, and then sows several herbal plants for vegetation restoration; the application number is 201410018435.9, and the invention patent named "a method of ecological restoration of heavy metal polluted soil" adopts fast-growing Tree species Bamboo willow extract several heavy metals from heavy metal-contaminated soil, but the above-mentioned technologies are not effective in remediating soil zinc and cadmium pollution, and there is also the problem of high remediation costs