Method for screening lead/cadmium repair tolerant plants from metal smelting region

Abstract

The invention provides a method for screening lead / cadmium repair tolerant plants from a metal smelting region, and relates to a plant repair method for heavy metal lead and cadmium contaminated soil. The method includes the following steps that 1, the varieties of crops and wild plants mainly planted locally are surveyed in the metal smelting region; 2, according to the field survey result, mainly-cultivated plants and wild plants on the periphery of the smelting region are selected, roots, stems, leaves, fruits and the like of the plants are collected, the contents of heavy metals at all the portions of the plants are analyzed in a laboratory, and plants with high tolerance and accumulation are screened out; 3, the plants which are screened out are planted in artificially-simulated high-concentration heavy metal contaminated soil, and the plant growth condition is observed in the plant growth process. According to the method, the repair plants are screened from a heavy metal contaminated zone, pertinence is high, the screening process is simple, and the screening success rate is high. The situation that newly-introduced plants do not adapt to local environments, so that the growth condition is not good, and the repair effect is affected can be avoided, and the plant repair cost is reduced.

Description

technical field [0001] The invention relates to a method for phytoremediation of soil polluted by heavy metal lead and cadmium, in particular to a method for screening tolerant plants for lead / cadmium repair from metal smelting areas. Background technique [0002] Soil heavy metal pollution has the characteristics of concealment, long-term and irreversible. Heavy metals can directly or indirectly endanger human health through contact with the food chain. Contaminated soil remediation methods, such as leaching, heat treatment, immobilization, and chemical methods, are not only costly and inefficient, but also destroy soil structure and microbial populations, and may cause secondary pollution, making it difficult to apply on a large scale; Although the soil-for-soil method can completely remove the polluted soil in the polluted area, it is expensive and the use area is limited, so it cannot fundamentally solve the problem of heavy metal pollution. [0003] Phytoremediation wa...

AI Technical Summary

Problems solved by technology

[0005] In summary, in view of the defects of complex screening process, short plants, and poor environmental adaptability in general phytoremediation of heavy metal pollution in smelting areas, it is an efficient and practical method to screen and remediate plants in areas with severe heavy metal pollution (such as smelting areas and mining areas). Methods

Images