Strengthened repairing agent using hyper accumulator Solanum nigrum L, and method for repairing heavy metal polluted soil by using strengthened repairing agent

A technology for super-accumulating plants and polluted soil is applied in the field of strengthening remediation agents to remediate heavy metal-contaminated 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 hyper accumulator Solanum nigrum L, and method for repairing heavy metal polluted soil by using strengthened repairing agent

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Experimental program
Comparison scheme
Effect test

Embodiment

[0014] Enhanced remediation effect of Solanum nigrum active substances on cadmium-contaminated soil

[0015] 1 test material

[0016] 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 some nightshade (including roots and leaves) and ghost needles (including roots, stems and leaves), and g...

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Abstract

The invention relates to a phytoremediation technology for cadmium-polluted soil, particularly to a strengthened repairing agent using a hyper accumulator Solanum nigrum L, and a method for repairingheavy metal polluted 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 according to 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 thecadmium-polluted soil by the hyper accumulator Solanum nigrum L is increased by 40.2-77.2% 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 an enhanced restoration agent using the super-enrichment plant Solanum nigrum and a method for repairing heavy metal-contaminated soil by using the enhanced restoration agent. Background technique [0002] Phytoremediation of heavy metal-contaminated soil mainly refers to the normal growth of hyper-accumulative plants (hyper-accumulative plants) 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. way. 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 calle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/14B09C1/10
CPCB09C1/105C09K17/14
Inventor 魏树和韩冉
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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