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Method for remediating Hg-polluted soil of farmland through plant

A technology of polluted soil and phytoremediation, applied in the field of Hg polluted soil remediation

Inactive Publication Date: 2017-02-22
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies in the prior art, the present invention provides a method for phytoremediation of farmland Hg-contaminated soil. The method is simple, convenient and easy to implement, and can effectively enrich the farmland soil subjected to heavy metal Hg, thereby purifying the soil. It can realize the recycling of polluted soil, which has very prominent social and economic benefits under the condition that the area of ​​cultivated land is decreasing day by day and the land pollution is becoming more and more serious.

Method used

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0024] 1. Select a suitable planting area. Milky Euphorbia 15-40cm high, with white emulsion, erect stem, lavender lower part, taupe seeds or brown spots, about 2mm long. The flowering period is March-April, and the fruit ripening period is June-August. Euphorbia diaspora is suitable for growing in all provinces and regions from East China, Northeast China to Southwest China. After testing, the mercury content in the soil of the planting area is 1.2-1.5mg / kg.

[0025] 2. Improve the soil. Fertilize and improve the soil before planting seeds. The amount of fertilizer applied is determined according to the method of soil testing and formula fertilizer. The amount of fertilizer applied is: commercial organic ferti...

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Abstract

The invention provides a method for remediating Hg-polluted soil of a farmland through plant, and belongs to the technical field of farmland soil remediation and treatment. The method for remediating the Hg-polluted soil of the farmland through the plant comprises the following steps: 1) applying fertilizer to the Hg-polluted soil to improve the soil fertility; and 2) planting euphorbia esula in the improved soil. According to the method for remediating the Hg-polluted soil of the farmland through the plant, the soil fertility is improved; an enriching crop, namely, euphorbia esula, is planted to enrich the heavy metal Hg in the polluted farmland, so that the problem of excessively high metal mercury content of the farmland soil can be solved.

Description

technical field [0001] The invention belongs to the field of remediation of Hg-contaminated soil, and in particular relates to a method for phytoremediation of farmland Hg-contaminated soil. Background technique [0002] Mercury is an element that is harmful to the environment and not essential to the human body. Large-scale human activities since industrialization have caused a large amount of mercury to be discharged into the environment. With the mining of gold mines, the serious mercury pollution of the surrounding soil and water is caused, and the mercury-containing waste is still increasing. In my country, with the rapid economic growth and the continuous improvement of urbanization, the problem of mercury polluted soil is very serious nationwide, especially causing serious harm to farmland soil. The survey results in typical areas show that mercury-contaminated soil poses a significant threat to the water environment and the quality of agricultural products. Inorga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 魏丽苗竹董天昊吕正勇李淑彩冯国杰朱湖地
Owner BEIJING GEOENVIRON ENG & TECH
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