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Application of sweet clover in remediation of heavy metal contaminated soil

The technology of white-flowered rhinoceros and polluted soil, which is applied in the field of environmental remediation, can solve problems such as the difficult process of remediation of heavy metal-contaminated soil, and achieve the effects of enriching biodiversity, wide remediation area and simple management.

Pending Publication Date: 2022-07-01
云南省生态环境科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when lead (Pb), chromium (Cr), arsenic (As) and other heavy metal elements with multiple valence states are combined with other substances, they will show more complex environmental behavior and environmental effects, making the remediation of heavy metal-contaminated soil more difficult process

Method used

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  • Application of sweet clover in remediation of heavy metal contaminated soil
  • Application of sweet clover in remediation of heavy metal contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The embodiment of the present application provides an experiment for verifying the effect of the white-flowered oleracea to restore heavy metal soil, including the following steps:

[0026] In this experiment, the effect of wild oleracea oleracea plants on heavy metal soil remediation was analyzed.

[0027] 1) Collection of plant samples and tailings samples (growth substrates): Collect 4 complete, well-grown, no lesions and dry leaves on the tailings pile. After completely removing the residues from the roots , seal the collected samples of the oleus oleracea plant in a plastic sample bag for use; while collecting the oleracea oleracea plant samples, take the tailings at the plant growth place (5-30cm from the surface), and mix the tailings collected at multiple points. , sealed for use.

[0028] 2) Pretreatment of the samples of Oleaceae plant samples: first wash the soil and other adherents on the surface of Oleaceae plants with tap water, then rinse with deionized ...

Embodiment 2

[0039] This embodiment discloses a planting test performed by collecting heavy metal contaminated soil in a specific place, including the following steps:

[0040] 1) Mixing and spreading the seeds of the white flower grass oleracea or transplanting seedlings in heavy metal polluted soil. The soil in this example was selected from the soil around the tailings heap in Datun Town, Gejiu City, Yunnan Province (geographical coordinates: 23.396508°N, 103.281338°E), and was watered irregularly to keep the soil moisture content at 35-50%.

[0041] 2) Harvest detection after 10 months of growth, select 4 strains that do not appear to be poisoned by heavy metals, have no dead leaves and rot leaves and grow well, and are divided into aboveground parts and underground parts after the whole plant is harvested, and carry out heavy metals Pb, The detection of Cr, As, Cd and Sn, the detection results are shown in Table 2:

[0042] Table 2 Contents of heavy metals in different parts of Oleac...

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Abstract

The invention belongs to the technical field of environmental remediation, and particularly relates to application of sweet clover to remediation of heavy metal contaminated soil. The invention discloses application of melilotus suaveolens to remediation of heavy metal contaminated soil on the first aspect. The invention further provides a remediation method for the heavy metal contaminated soil. The remediation method comprises the following steps that sweet clover seeds are evenly stirred and sown, or sweet clover seedlings are transplanted into the heavy metal contaminated soil; the method comprises the following steps: regularly harvesting overground parts of plants on the planted sweet clover with stubbles, or recovering the whole plant of the sweet clover, and then sowing seeds of the sweet clover or transplanting seedlings of the sweet clover until the heavy metal content of the heavy metal contaminated soil is reduced to a preset content. According to the method disclosed by the invention, the content of several heavy metals with relatively high enrichment in the plant body in the soil can be reduced by measures such as repeatedly harvesting the overground part of the plant, so that the purpose of repairing the heavy metal polluted soil is achieved.

Description

technical field [0001] The application belongs to the technical field of environmental remediation, and in particular relates to the application of the white-flowered oleracea in remediating heavy metal-contaminated soil. Background technique [0002] The development and utilization of mineral resources not only brings huge economic benefits to the society, but also due to the limitation of historical development, a large number of tailings have been stored in the open air for a long time. It will gradually leach and enter the soil, causing serious soil heavy metal pollution, which will lead to soil degradation, crop yield and quality decline, directly poisoning plants or endangering human health through the food chain and a series of problems. Therefore, repairing heavy metal-contaminated soil and restoring the original function of the soil has always been an issue of international concern. [0003] After heavy metals enter the soil, they generally present complex pollutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 牛学奎吴学勇王薇王舒婷周涛
Owner 云南省生态环境科学研究院
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