A Phytoremediation Method for Severely Contaminated Farmland with Cadmium and Lead

A technology for phytoremediation and lead pollution, applied in the restoration of polluted soil and other directions, can solve the problem of lack of research on phytoremediation of farmland with severe heavy metal pollution, and achieve the effect of solving ecological risks, stabilizing heavy metals, and promoting timely renewal.
CN113058984BActive Publication Date: 2022-06-14SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2022-06-14

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Abstract

This application belongs to the technical field of farmland restoration polluted by heavy metals. The application provides a phytoremediation method for heavily cadmium-lead polluted farmland. Firstly, passivating agents are applied to heavily cadmium-lead-contaminated farmland soils to reduce the bioavailability, migration and transformation capabilities, and ecotoxicity of heavy metal elements in the soil, and then plant herbaceous fiber crops with heavy metal tolerance in the passivated soil for deactivation. Cultivate, stabilize the heavy metals in the soil, improve the restoration effect, and avoid further harm caused by the diffusion of heavy metals to the surrounding environment. The phytoremediation method of the present application is based on plant stabilization technology, which solves the current ecological risk problem of heavy cadmium and lead pollution of farmland, and retains the underground parts of perennial herbaceous fiber crops in heavy heavy metal polluted soil, which can continue to play the role of stabilizing heavy metals in the soil. Remediation is sustainable and economically beneficial while remediating the soil.
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Description

Technical field

[0001] The present application belongs to the field of heavy metal pollution farmland remediation technology, in particular involving a phytoremediation method of heavily cadmium lead contaminated farmland. Background

[0002] With the rapid development of urbanization, industry and agriculture in recent years, and the continuous expansion of human activity space, the heavy metal pollution of Farmland in China has been increasingly aggravated. According to the 2014 National Soil Pollution Survey Communiqué, the rate of soil points exceeding the standard of cultivated land is 19.4%, of which the proportion of heavily polluted points is 1.1%, and the problem of farmland pollution cannot be ignored.

[0003] Lead and cadmium can cause damage and threats to crops and human health. When lead cadmium enters plant cells in the soil, a series of physiological processes such as photosynthesis, respiration, nucleic acid metabolism and division of root cells of plants will b...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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