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Strengthened repairing agent using active substance in enrichment plant, and method for heavy metal soil by using strengthened repairing agent

A technology for enriching plants and hyper-enriching plants is applied in the field of using active substances in enriched plants to strengthen remediation agents and the use of enhanced remediation agents for heavy metal soils, which can solve problems such as secondary pollution and achieve the effect of improving phytoremediation efficiency.

Inactive Publication Date: 2018-08-28
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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Problems solved by technology

However, these fortifiers often bring secondary pollution problems while increasing the extraction amount of hyperaccumulator plants

Method used

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  • Strengthened repairing agent using active substance in enrichment plant, and method for heavy metal soil by using strengthened repairing agent

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Experimental program
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Effect test

Embodiment

[0012] EXAMPLE The enhanced remediation effect of the active substance of Lycopodium chinensis on cadmium-contaminated soil

[0013] 1 test material

[0014] The test soil is collected from the suburbs of Shenyang, which is brown soil. Its physical and chemical properties are pH 6.65, organic matter 17.01mg / kg, total N 1.11mg / kg, total P 1.22mg / kg, and available K 139.16mg / kg. The total cadmium content in the soil is 0.16mg / kg, which belongs to the clean soil of cadmium. The soil samples were crushed and passed through a 1mm sieve for later use. Add analytically pure CdCl evenly by means of aqueous solution mixing 2 2.5H 2 O medicament, make the total cadmium content in the soil be 8.5mg / kg, pack in the pot respectively, every pot 2.5kg, balance 6 months. On the same plot where the clean soil was collected, seeds of the hyperaccumulator Solanum nigrum L. were collected for later use. Collect a number of wolfberry grass (including roots, stems and leaves) and ghost needles...

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Abstract

The invention relates to a phytoremediation technology for cadmium-polluted soil, particularly to a strengthened repairing agent using an active substance in an enrichment plant, and a method for heavy metal soil by using the strengthened repairing agent, wherein Bidens tripartita L is subjected to water leaching to obtain an active substance, and the active substance and water are mixed accordingto a mass ratio of 0.1-10:100-1000 to obtain a mixture so as to obtain the strengthened repairing agent. According to the present invention, the amount of the removal of cadmium from the cadmium-polluted soil by the hyper accumulator Solanum nigrum L is increased by 28.2%-61.4% so as to significantly improve the phytoremediation efficiency of the cadmium-polluted soil.

Description

technical field [0001] The invention relates to a phytoremediation technology for cadmium-contaminated soil, in particular to a method for strengthening a remediation agent by utilizing active substances in enriched plants and using the enhanced remediation agent for heavy metal soil. Background technique [0002] Phytoremediation of heavy metal-contaminated soil mainly refers to a method in which hyperaccumulator plants grow normally on the polluted soil, and after the plants are enriched with a large amount of heavy metals, the plants are removed from the polluted soil, so that the polluted soil can be cleaned. Hyper-accumulator plants refer to special plants that have an over-accumulation effect on heavy metals in the soil. Usually, they must have critical content characteristics, transfer characteristics, enrichment coefficient characteristics, and tolerance characteristics. Plants with these four basic characteristics can be called hyper-accumulators. set of plants. Ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/00B09C1/105B09C2101/00
Inventor 魏树和韩冉
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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