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Application of Callistephus chinensis in restoration of lead-contaminated soil

A technology for lead-contaminated soil and contaminated soil is applied in the application field of Jiangxi wax in remediation of lead-contaminated soil, which can solve problems such as unsatisfactory treatment effect, and achieve the effects of reducing secondary pollution and reducing remediation costs.

Inactive Publication Date: 2015-09-09
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 Callistephus chinensis in restoration of lead-contaminated soil
  • Application of Callistephus chinensis in restoration of lead-contaminated soil

Examples

Experimental program
Comparison scheme
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 Jiangxi wax. After the seedlings grow 5-6 leaves, they are transplanted into the above-mentioned treated soil. 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 results ar...

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 Jiangxi wax. After the seedlings grow 5-6 leaves, they are transplanted into the above-mentioned treated soil. 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 Jiangxi wax grown on smelter-contaminated soil are similar to those of artificially polluted soil. The aboveground biomass decreased slightly, but there was no significant difference with the control (P>0.05), showing strong tolerance. The Pb content in the upper part of Ladi, Jiangxi exceeded the critical content standard of 1000mg kg-1 that the lead hyperaccumulator plants need to reach, which co...

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Abstract

The invention relates to plant restoration technology for lead-contaminated soil, specifically to application of Callistephus chinensis in restoration of lead-contaminated soil. Callistephus chinensis is planted in soil containing the pollutant--lead; considerable lead in the contaminated soil is absorbed through the root system of Callistephus chinensis and transferred to overground parts; when maximum biomass of the overground parts of Callistephus chinensis is reached in growth of Callistephus chinensis, the overground parts are removed from the contaminated soil, so the purpose of removing the pollutant--lead in the soil is achieved. According to the invention, the enrichment plant--Callistephus chinensis is used to treat lead-contaminated soil, so the following advantages are obtained: low cost, good operationality, no damage to the physical and chemical properties of soil, no secondary pollution, good effects on prevention of soil drifting and water erosion, etc.

Description

technical field [0001] The invention relates to a phytoremediation method for treating lead-contaminated soil, strictly speaking, it is a method for repairing lead-contaminated soil by using Jiangxi wax, that is, the application of Jiangxi wax 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 technology is cheap, does not damage the...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 崔爽刘艺芸李萍商丽艳
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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