A method for repairing cadmium-contaminated soil by using Swallow palm

A technology for cadmium-contaminated soil and swallow palm, which is applied in the field of soil remediation, can solve problems such as remediation of cadmium-contaminated soil, and achieve the effects of strengthening the remediation effect, good ornamental value, economic benefit, and strong enrichment ability.

Active Publication Date: 2022-04-19
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no technical report on using this plant to remediate heavy metal pollution at home and abroad, and there is no technical report on using this plant to remediate cadmium-contaminated soil

Method used

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  • A method for repairing cadmium-contaminated soil by using Swallow palm

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, the potted plant simulation experiment method is adopted, and the cultivated layer soil of 0-20 cm in moderately cadmium-polluted farmland in Henan is selected. The pH value of the farmland soil is about 7.9, the total cadmium concentration is 2.56 mg / kg, and the available cadmium is 1.58 mg / kg kg.

[0023] A method for repairing cadmium-contaminated soil by using Swallow palm, the specific repair method is as follows:

[0024] 1) Naturally air-dry the soil in the plow layer, crush it, and remove the sundries; fill it into plastic pots with an upper edge diameter and a height of 18×15 cm, respectively, according to the amount of 4 kg per pot. Mix urea, potassium dihydrogen phosphate, and potassium chloride according to the ratio of N:P:K mass ratio of 5:6:5 to form a compound fertilizer, and add it to the pot according to the application amount of 270 mg of compound fertilizer per kilogram of soil. Mix well, water;

[0025] 2) Propagation of Swallow p...

Embodiment 2

[0029] This embodiment also adopts the potted plant simulation test method, and all operations refer to embodiment 1. The difference is: step 3) during the growth of the Swallow palm plant, no plant growth regulator is sprayed.

Embodiment 3

[0031] This embodiment also adopts the potted plant simulation test method, and all operations refer to embodiment 1. The difference is: Step 3) During the growth of Swallow palm plants, spray the potting soil with a solution of 2-(3.4-dichlorophenoxy)triethylamine, which is a production-increasing amine, at a concentration of 5.3 μg every 35 days / kg (soil weight).

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Abstract

The invention relates to a method for repairing cadmium-contaminated soil by using swallow's palms. The swallow's palms are transplanted in the cadmium-contaminated soil to be treated, plant growth regulators are applied during the growth of swallow's palms, and the swallow's palms are placed on the ground after repairing. Partially harvested or removed in its entirety. The invention utilizes the heavy metal tolerance and super-enrichment function of the swallow palm to explore the possibility of using the plant to repair cadmium-contaminated soil. Tests have proved that the swallow palm can repair the cadmium-contaminated soil very well, and the restoration effect is good.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for remediating cadmium-contaminated farmland soil by using swallow palms. Background technique [0002] my country's current heavy metal pollution points of cultivated land exceed the standard rate of 19.4%. Among all heavy metal pollution, cadmium pollution is the most serious, with a point exceeding standard rate of 7.0%. Cadmium is one of the most biomigratable heavy metals. It is easily absorbed and accumulated by plants. If it exceeds a certain limit, it will not only seriously affect the yield and quality of crops, but also enter the human body through the biological chain, causing serious damage to the liver and kidney functions of the human body. hazards. Countries around the world generally list cadmium as a priority pollutant for prevention and control. Phytoremediation technology is an effective method and mainstream direction for remed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 董学亮刘珂珂李中贤王俊伟谢亚雄张祥刘小培刘清余学军
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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