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Application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil

A technology of nitrilotriacetic acid and soil repair, which is applied in the application field of nitrilotriacetic acid in repairing heavy metal cadmium pollution in soil of Cultivar chinensis, which can solve the problem that the repair potential is not fully exerted, and achieve the effect of improving the repair efficiency

Inactive Publication Date: 2012-12-12
SICHUAN AGRI UNIV +7
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Problems solved by technology

[0006] In the research work of the inventor engaged in the restoration of heavy metal pollution, it has been found that Scutellaria is a heavy metal-enriched plant (Chinese patent application 200910309125), but its restoration potential has not been fully utilized. large effect, so the applicant conducted further research

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  • Application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil

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Embodiment Construction

[0020] The present invention will be further described in detail below in combination with specific embodiments.

[0021] However, it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following examples.

[0022] pot experiment

[0023] The test site is located in the teaching and research farm of Sichuan Agricultural University.

[0024] Using the method of potting to simulate heavy metal pollution in the soil, the Asteraceae plant Asteraceae ( Siegesbeckia orientalis L ) seedlings were transplanted into potting soil contaminated with 10 mg / kg cadmium. This experiment started on April 20th, and the seedlings transplanted were collected from the heavy metal soil in the greenhouse of Sichuan Agricultural University, with 2 plants in each pot and 3 repetitions. The soil weight of each pot is 8kg, and 0.48g of pure nitrogen and phosphorus (P 2 o 5 ) 0.36g, Potassium (K 2 O) 0.36 g. There were 5 treatme...

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Abstract

The invention relates to the technical field of restoring of heavy metal pollution in the environment, in particular to application of nitrilotriacetic acid for reinforcing capability of siegesbeckia orientalis in restoring cadmium-polluted soil. The technology comprises directly transplanting the siegesbeckia orientalis in the cadmium-polluted soil, adding the nitrilotriacetic acid of 1-2mmol / kginto the heavy-metal-cadmium-polluted soil after the siegesbeckia orientalis is planted for 80-90 days so as to improve the efficiency of the siegesbeckia orientalis in restoring the cadmium-pollutedsoil, adding the nitrilotriacetic acid liquid into the soil in a spraying mode, wherein the nitrilotriacetic acid is provided with a multi-tooth-shaped dentate, can form a heterocyclic chemical compound together with single metal ions, can separate out cadmium ions fixed in the soil, increases soluble concentration of cadmium in soil solution, promotes transmission of cadmium from a root system to an overground part, improves cadmium absorption of the siegesbeckia orientalis, shortens restoring time and transfers most of cadmium to the overground part of a plant; and harvesting after the plant grows for 105 days, performing ashing treatment on the harvested overground part, and extracting heavy metal so as to achieve the goal of improving restoring efficiency.

Description

technical field [0001] The invention relates to the technical field of remediation of heavy metal pollution in the environment, in particular to the application of nitrilotriacetic acid in remediation of heavy metal cadmium pollution in soil. Background technique [0002] With the development of industrial and agricultural production such as smelting, electroplating, leather, fertilizer, and breeding, soil cadmium pollution is becoming more and more serious. Cadmium heavy metal pollution in the environment has the characteristics of long-term, concealment and irreversibility. Its pollutants have poor mobility in the medium, long residence time, cannot be degraded by microorganisms, and can be transmitted through the food chain, which will eventually affect environmental quality and endanger human health. . Therefore, it is of great practical significance to study new remediation technologies for cadmium-contaminated soil. [0003] The remediation of heavy metal-contaminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08
Inventor 张世熔兰吉川陈强李云贾永霞徐小逊李婷
Owner SICHUAN AGRI UNIV
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