Method for repairing heavy metal contaminated soil or water body by utilizing hyperaccumulator polymerization

A technology for hyperaccumulating plants and polluted soil, which is applied in the field of remediating heavy metal polluted soil or water bodies by using hyperaccumulating plants to aggregate grass, can solve the problems of high copper phytotoxicity and other problems, achieve good effects, easy planting, no damage to the basic structure and effect of function

Inactive Publication Date: 2016-06-22
NORTHWEST A & F UNIV
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AI Technical Summary

Problems solved by technology

Copper is an essential trace element for plant growth, but excessive copper has high phytotoxicity

Method used

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Embodiment Construction

[0014] A method for repairing heavy metal-contaminated soil or water by using hyperaccumulative plant asparagus, planting asparagus in soil or water polluted with cadmium, copper, lead and zinc, and using its natural growth process to supercharge these heavy metals Enrichment ability, transfer cadmium, copper, lead and zinc in the soil or water to the aboveground part of the plant. When the commune grass grows to maturity, harvest the aboveground part or the whole plant and remove it from the polluted soil or water. In cadmium, copper, lead and zinc polluted soil or water, repeat the above operation process of planting and harvesting and removing commemorative grass, until the content of cadmium, copper, lead and zinc in the soil or water reaches the environmental quality standard, so as to achieve the restoration of soil or The purpose of cadmium, copper, lead and zinc pollution in water bodies.

[0015] The planting of polygrass means that it can be planted in soil culture, ...

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Abstract

The invention relates to the technical field of phytoremediation of heavy metal contaminated environment, in particular to a method for repairing heavy metal contaminated soil or water body by utilizing hyperaccumulator polymerization. The method disclosed by the invention has the advantages of being capable of removing multiple pollutants, being low in cost, good in effect and strong in operability, and being capable of avoiding damage to the basic structure and functions of the water body or soil, avoiding secondary pollution, preserving water and soil and beautifying environment at the same time, and can be popularized and applied in a large scale. According to the technical scheme adopted by the invention, symphytum officinale is planted in the soil or water body polluted by cadmium, copper, lead and zinc, and when the symphytum officinale grows to a mature period, the overground part or the whole plant is harvested and is removed from the polluted soil or water body, and then the processes of planting and harvesting and removing the symphytum officinale can be repeated in the soil or water body polluted by cadmium, copper, lead and zinc, until the contents of cadmium, copper, lead and zinc in the soil or water body reach environmental quality standards.

Description

1. Technical field: [0001] The invention relates to the technical field of phytoremediation of heavy metal-polluted environments, in particular to a method for remediating heavy-metal-polluted soil or water bodies by using hyperaccumulative plant asparagus. 2. Background technology: [0002] Heavy metal pollution in soil and water is one of the major environmental problems facing the world. As the largest developing country in the world, after more than 30 years of rapid development, my country has seriously polluted the soil and water environment. According to the "National Soil Pollution Bulletin" issued by the Ministry of Environmental Protection and the Ministry of Land and Resources on April 17, 2014, the total over-standard rate of cultivated land soil in my country is 16.1%, and the proportion of slightly, lightly, moderately and heavily polluted sites is 11.2% respectively. %, 2.3%, 1.5% and 1.1%. Inorganic pollutants are the main type of pollution, followed by orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00C02F3/32
CPCB09C1/002B09C1/105B09C2101/00C02F3/327C02F2101/20C02F2103/007Y02W10/10
Inventor 张增强李荣华沈锋孙西宁
Owner NORTHWEST A & F UNIV
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