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Ecological restoration method of heavy metal contaminated farmland soil

An ecological restoration and heavy metal technology, applied in the restoration of polluted soil, etc., can solve the problem of high cost, and achieve the effect of slowing down pollution and increasing biological performance.

Inactive Publication Date: 2017-08-22
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

However, this approach requires high costs, so it cannot be the best choice for the restoration approach. 2. Use special plants to absorb heavy metals in the soil, and then remove the plants or use engineering techniques to change the heavy metals into soluble and free states, and then After leaching, the heavy metals in the eluate are collected, so as to achieve the dual purpose of recycling heavy metals and reducing heavy metals in the soil

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  • Ecological restoration method of heavy metal contaminated farmland soil

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Embodiment Construction

[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] The invention provides a technical solution: a method for ecological restoration of farmland soil polluted by heavy metals, comprising the following steps:

[0021] Choose different types of amaranth according to the planting time;

[0022] Choose the appropriate planting density according to the pollution degree of the soil;

[0023] grow amaranth;

[0024] Amaranth planting management.

[0025] The specific steps to choose different types of amaranth according to the planting time are: use red amaranth and flower red varieties with strong cold resistance in winter and early spring, and use flower red amaranth and whole green amaranth with strong resistance to diseases and insect pests in other seasons, such as from late February to Marc...

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Abstract

The invention provides an ecological restoration method of heavy metal contaminated farmland soil. The method comprises the following steps that different kinds of edible amaranth are selected according to planting time; suitable planting density is selected according to the contamination degree of the soil; the edible amaranth is planted; and planting management over the edible amaranth is carried out. Compared with the prior art, the method has the following beneficial effects that contamination of heavy metal to the soil is effectively slowed down by planting the edible amaranth, and biological performance of the soil is improved.

Description

technical field [0001] The invention relates to an ecological restoration method for farmland soil polluted by heavy metals, and belongs to the field of crop planting. Background technique [0002] Heavy metals refer to metals with a specific gravity greater than 5 (generally refers to metals with a density greater than 4.5 grams per cubic centimeter), and also refer to metals with an atomic weight greater than 55. Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds. It is mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of heavy metal products that exceed the standard, resulting in varying degrees of increase in the content of heavy metals in the environment, which exceeds the normal range of national safety standards, can directly endanger human health, and lead to deterioration of environmental quality . In 2011, my country's first "Twelfth Five-Year" special plan - "The Twelf...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 张亚黄璜廖石榴曹海佳黄尧廖晓兰苏品
Owner HUNAN AGRICULTURAL UNIV
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