Heavy metal lead and antimony polluted soil remediation method

Abstract

The invention discloses a method for remediating soil polluted by heavy metal lead and antimony. The method is as follows: planting pumpkins in the soil polluted by heavy metal lead and antimony, and treating them after they grow and develop. By planting pumpkins in farmlands where lead and antimony exceed the standard, the heavy metal lead and antimony in the soil can be absorbed and transferred to pumpkin roots, stems and leaves, thereby effectively reducing the content of lead and antimony in the soil. Provide a technical support for remediating lead and antimony pollution in soil and ensuring the safety of post-cropping food. The planting technique of the method is simple and easy to be mastered by farmers, and harvested products can be purchased from farmers for treatment without causing secondary pollution. According to the degree of heavy metal lead and antimony pollution in farmland soil, continuous planting can achieve the purpose of completely remediating soil heavy metal lead and antimony pollution.

Description

technical field [0001] The invention relates to a method for remediating heavy metal lead and antimony polluted soil. Background technique [0002] For heavy metal-contaminated soils, phytoremediation has been considered to be environmentally friendly and low-cost. Since the development history of phytoremediation research for more than 20 years, more than 400 hyperaccumulators have been reported internationally, but the types of heavy metal enrichment are still relatively limited. Among them, hyperaccumulators of Ni account for about 73%. Antimony hyperaccumulation or enrichment and its biological process are less reported. Hyperremediation plants have shortcomings and limitations such as small biomass, long restoration years, shallow root depth, unsuitability to high pollution concentrations or multiple pollutions, and are not suitable for the characteristics and climate of polluted soils in various places. Obtained from the wild environment, lack of a complete set of ag...

AI Technical Summary

Problems solved by technology

Super-remediation plants have shortcomings and limitations such as small biomass, long restoration period, shallow root depth, inadaptability to excessively high pollution concentrations or multiple pollutions, and are not suitable for polluted soil characteristics and climates in various places. Obtained from the wild environment, lacking a complete set of agricultural management and measures

[0003] Through extensive screening and investigation of plants in my country, it was discovered for the first time that a native lead-enriching plant in my country, sedum alfredii, had the highest lead concentration in its shoots up to 1182 mgk g-1. Most of the collected plants do not have the ideal traits that people expect, and there are still different defects in many aspects. It is difficult to form a relatively complete phytoremediation technology that can be directly applied to the restoration practice on a large scale.

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