Application of polygonum runcinatum to remediation of soil contaminated by heavy metals mainly comprising cadmium, zinc, lead and copper

Abstract

The invention discloses a polygonaceae plant, and in particular relates to an application of polygonum runcinatum to remediation of soil contaminated by heavy metals mainly comprising cadmium, zinc, lead and copper, namely, the polygonum runcinatum is planted in the soil contaminated by the heavy metals mainly comprising cadmium, zinc, lead and copper. In the invention, by virtue of the enrichment characteristic of the polygonum runcinatum on the heavy metals mainly comprising cadmium, zinc, lead and copper, the polygonum runcinatum is planted in the contaminated soil so as to absorb and accumulate the heavy metals mainly comprising cadmium, zinc, lead and copper; and most part of the polygonum runcinatum is transported to an over-ground part so as to achieve the purpose of remediation of the soil contaminated by the heavy metals mainly comprising cadmium, zinc, lead and copper. The polygonum runcinatum is photophilous, shade-tolerant, cold-resistant and barren-resistant, grows at a fast speed and is extensively managed, thus achieving lower cost and strong operability; and meanwhile the polygonum runcinatum also has the functions of green coverage, reduction of water and soil loss and heavy metal pollution diffusion for the contaminated soil, thus developing a new variety of plant resources for remediation of the heavy metal contaminated soil.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution in the environment, in particular to the application of Chishan powder in remediation of heavy metal cadmium, zinc, lead and copper pollution in soil. Background technique [0002] With the continuous increase of human activities, heavy metal pollution of the global land is becoming more and more serious. Heavy metal pollution in my country's soil is mainly caused by the "three wastes" produced by mining, smelting, electroplating, chemical and other industries, as well as agricultural measures such as sewage irrigation and unreasonable application of pesticides and fertilizers. Many smelters have caused severe heavy metal pollution, especially cadmium, zinc, lead and copper, during the long-term production process. Soil heavy metal pollution is one of the main problems affecting human health and environmental quality. It not only affects crop production, but also affe...

AI Technical Summary

Problems solved by technology

Therefore, the purpose of the present invention is to address the above-mentioned problem of insufficient resources of plant varieties that can be used for bioremediation of heavy meta

Images