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Method of restoring soil polluted by heavy metal

A technology that pollutes soil and heavy metals, applied in the field of environmental pollution recovery, can solve problems such as insufficient plant species resources, and achieve the effects of multi-year growth, high recovery efficiency, and simplified procedures.

Inactive Publication Date: 2012-12-05
李银亭
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, solve the problem of insufficient plant species resources for bioremediation of soil heavy metal pollution in the prior art, and provide a method for repairing soil contaminated by heavy metals to reduce the content of heavy metal pollutants in the soil

Method used

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Examples

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Effect test

Embodiment 1

[0015] a. Swell the centipede grass seeds in pure water for 3 hours, place them in a dark place at a temperature of 30°C for 3 days to germinate, and then grow seedlings in the greenhouse at a temperature of 25°C, a humidity of 65%, and a light intensity of 240Lux, and light every day After 18 hours until it grows to 2 true leaves, transplant the centipede grass that grows to 2 true leaves;

[0016] b. Adopt direct transplanting method, plant centipede grass in heavy metal polluted soil under natural conditions, keep 75% field water holding capacity, fertilize every kilogram of soil and apply nitrogen 0.30g, phosphorus 0.20g, potassium 0.30g, apply lime to adjust pH To 6, the row spacing is 7cm, the plant spacing is 15cm, the centipede grass grows well for 5 months, the centipede grass leaves are regularly removed, and the underground part is kept; the centipede grass continues to grow, and the arsenic is continuously transported and transshipped to reduce the content of heavy ...

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Abstract

The invention relates to remediation of heavy metal pollution in the environment, in particular to a method of restoring soil polluted by heavy metal, which belongs to the field of environmental pollution remediation. The method is characterized in that a root system of ciliate desert-grass is used for absorbing arsenic from the soil, the arsenic from the soil is stored in leaves to ensure that the content of arsenic in the leaves of the ciliate desert-grass reaches 0.5-0.8 %, the leaves of the ciliate desert-grass are removed periodically, the underground part is reserved, and arsenic transportation and transfer can be performed continuously, so that the purpose of lowering the content of arsenic in the soil is achieved. The method has the benefits that the method is low in cost and high in restoring efficiency, simplifies the soil restoring procedure and is suitable for popularization and application; the harvested leaves are subjected to safe landfill or incineration concentratedly; no secondary pollution is generated; the diversity of soil organisms is restored and improved; a new plant resource variety is developed for a plant for restoring the soil polluted by the heavy metal; and a new advancement and development space is brought to the deep development of a plant restoring technology.

Description

technical field [0001] The invention relates to a restoration of heavy metal pollution in the environment, which belongs to the field of environmental pollution restoration, in particular to a method for repairing soil polluted by heavy metals. Background technique [0002] Pollutants are produced and accumulated along with the development of human production and living activities. Heavy metals such as mercury, lead, pot, chromium, arsenic, etc. are mainly produced in industrial production processes such as mining, beneficiation, smelting, forging, processing, and transportation. Waste gas, waste water, and waste residue discharge make the concentration of heavy metals in the environment thousands or even tens of thousands of times the background value. [0003] What is more serious is that after heavy metals enter the open environment, they will change their valence and circulate in various media, making it extremely difficult to disappear from the open environment, forming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/10
Inventor 李银亭
Owner 李银亭
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