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Application of ornamental sunflower in remediation of lead-polluted soil

A technology of lead-contaminated soil and polluted soil, applied in the application field of ornamental sunflowers in repairing lead-contaminated soil, can solve problems such as unsatisfactory treatment effects, and achieve the effect of reducing soil erosion and reducing repair costs

Inactive Publication Date: 2015-04-01
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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Problems solved by technology

But the governance effect in the prior art is not very ideal

Method used

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  • Application of ornamental sunflower in remediation of lead-polluted soil
  • Application of ornamental sunflower in remediation of lead-polluted soil

Examples

Experimental program
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Effect test

Embodiment 1

[0012] Embodiment 1 Pot concentration gradient experiment

[0013] A total of 4 treatments were set up in the experiment, which were the control (CK) and three Pb concentration gradient treatments, and the Pb dosing concentrations were: 1000mg kg -1 (T1), 3000 mg kg -1 (T2), 5000 mg kg -1 (T3), which are respectively 2, 6 and 10 times of the national soil environmental quality level 3 standard, and the added heavy metal form is Pb(NO 3 ) 2 , as an analytically pure reagent, it is added to the soil in a solid state, mixed thoroughly, and set aside for use after one month of equilibration.

[0014] The potted flowers are ornamental sunflowers, which are transplanted into the above-mentioned treated soil after the seedlings grow 5-6 leaves. 3 plants per pot, repeated 3 times. Water according to the soil water shortage situation, so that the soil moisture content is kept at about 70% of the field water capacity. Harvest when the plants are mature.

[0015] The experimental ...

Embodiment 2

[0021] Example 2 Soil pot experiment in smelting polluted area

[0022] Potted experiment using polluted soil collected from the abandoned Shenyang smelter in 2007, the lead content is 4020mg kg -1 (Y). Set the uncontaminated soil as the control (CK). The potted flowers are ornamental sunflowers, which are transplanted into the above-mentioned treated soil after the seedlings grow 5-6 leaves. 3 plants per pot, repeated 3 times. Harvest when the plants are mature.

[0023] The test results are as follows:

[0024] It can be seen from Table 2 that the enrichment characteristics of lead in ornamental sunflowers grown on smelter-contaminated soils are similar to those in artificially polluted soils. The aboveground biomass decreased slightly, but there was no significant difference with the control (P>0.05), showing strong tolerance. The content of Pb in the shoots of ornamental sunflowers exceeds the critical content standard of 1000 mg kg for lead hyperaccumulation plants ...

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Abstract

The invention relates to a plant remediation technology of lead-polluted soil, and in particular relates to an application of an ornamental sunflower in remediation of lead-polluted soil. The ornamental sunflower is planted on the soil containing lead pollutants; lead in the polluted soil is massively absorbed by the root of the ornamental sunflower and is transferred to an overground part organ; when the plant grows to the overground part and the biomass is maximum, the overground part organ of the plant is taken away from the polluted soil, so that the aim of removing the lead pollutants from the soil is fulfilled. Because the lead-polluted soil is treated by utilizing the enrichment plant ornamental sunflower, the application of the ornamental sunflower has the advantages of low cost and high operability, and has a good effect in prevention of wind erosion and water erosion of the polluted soil; moreover, the physical and chemical properties of soil cannot be destroyed and secondary pollution is avoided.

Description

technical field [0001] The invention relates to the phytoremediation technology of lead-contaminated soil, strictly speaking, it is a method for repairing lead-contaminated soil by using ornamental sunflower, an enrichment plant, that is, the application of ornamental sunflower in repairing lead-contaminated soil. Background technique [0002] Lead is one of the main heavy metal pollutants in the environment. Soil lead pollution is widespread in my country and around the world, especially around mines, smelters and roads, where lead pollution is more serious. Once lead enters the human body, it will interfere with the normal work of nerve cells through the blood, destroy the survival of hemoglobin in the blood and the permeability of brain microvessels, which can lead to retarded and unsound brain development, and ultimately affect people's intelligence. Therefore, lead pollution Soil management and restoration is a very urgent task. Contaminated soil phytoremediation techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
Inventor 崔爽刘艺芸李萍赵艳锋
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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