Accelerated repairing method for heavy metal contaminated soil plants

Abstract

Disclosed is an accelerated repairing method for heavy metal contaminated soil plants. The accelerated repairing method comprises the following steps that (a) according to the species and content of heavy metals in heavy metal contaminated soil, the hyperaccumulator plants suitable for local growth are selected in a targeted mode and planted in the heavy metal contaminated soil; (b) on the basis of a narrow band spectra that can determines rapid growth of the plants, a spectral transfer technology is used, some wavelengths of light in the solar spectra are converted into the wavelength of theabove used narrow band spectra as many as possible, and the hyperaccumulator plants planted in the heavy metal contaminated soil are lighted; (c) fluorescent materials that can achieve spectral transfer are added into the manufacturing process of agricultural films, and the agricultural films special for hyperaccumulator plants planted in the heavy metal contaminated soil are produced; and (d) thehyperaccumulator plants cover the growth process of the hyperaccumulator plants planted in the heavy metal contaminated soil through modes such as greenhouses, and the plants receive exposure of useful light to the most extend in the environment of natural lighting.

Description

technical field [0001] The invention relates to a plant-accelerated restoration method for heavy metal-contaminated soil, and belongs to the technical field of bio-optics applied to environmental protection. Background technique [0002] The existing phytoremediation technology for heavy metal-contaminated soil is to use ordinary planting methods to absorb heavy metals during plant growth. For example, a "method for remediating heavy metal-contaminated soil by intercropping herbal plants" is disclosed in Chinese invention patent application 201610708833.2. The method is to plant herbal plants in the soil polluted by heavy metal ions, which is characterized in that: the herbal plants are water spinach, amaranth, sludge polygonum and bitter cabbage and are planted in the soil polluted by heavy metal ions in an intercropping manner. The superaccumulation of heavy metal ions is selectively absorbed by plants, and the heavy metal ions in the soil are transferred to the abovegroun...

AI Technical Summary

Problems solved by technology

However, plants capable of heavy metal uptake (commonly referred to as heavy metal hyperaccumulators, heavy metal enrichment plants) tend to grow slowly and have small plants (i.e., low biomass), so soil remediation results are slow

A further solution is to use plant fill lights for supplementary light irradiation, mainly at night or when natural light is insufficient, but this method is economically unfeasible

Images