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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  • Application of Callistephus chinensis in restoration of lead-contaminated soil
  • Application of Callistephus chinensis in restoration of lead-contaminated soil

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[0012] Example 1 Potted Concentration Gradient Experiment

[0013] A total of 4 treatments were set up in the experiment, namely the control (CK) and three Pb concentration gradient treatments. The concentration of Pb was 1000 mg kg. -1 (T1), 3000mg kg -1 (T2), 5000mg kg -1 (T3), which are 2, 6 and 10 times the national soil environmental quality three-level standard respectively, and the heavy metal form added is Pb (NO 3 ) 2 , as an analytically pure reagent, add it to the soil in solid form, mix well, and equilibrate for one month before use.

[0014] The potted flowers are Jiangxi wax, and the seedlings are transplanted into the above-mentioned treated soil after they have grown 5-6 leaves. 3 per pot, 3 repetitions. Water according to the soil water shortage, so that the soil water content is maintained at about 70% of the field capacity. Harvest when plants are mature.

[0015] The experimental results are as follows:

[0016] It can be seen from Table 1 that the ...

Example Embodiment

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

[0022] Using the polluted soil collected from the abandoned Shenyang smelter in 2007 for pot experiment, the lead content is 4020mg kg -1 (Y). The uncontaminated soil was set as the control (CK). The potted flowers are Jiangxi wax, and the seedlings are transplanted into the above-mentioned treated soil after they have grown 5-6 leaves. 3 per pot, 3 repetitions. Harvest when plants are mature.

[0023] The test results are as follows:

[0024] It can be seen from Table 2 that the enrichment characteristics of Jiangxi wax grown on the contaminated soil of the smelter are similar to those of the artificially polluted soil. 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 Jiangxi Wax exceeded the critical content standard of 1000 mg kg-1 for lead hyperaccumulators, which was in line with a...

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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...

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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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