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Method of repairing heavy metal polluted soil by using peanut-oil sunflower crop rotation mode

A technology for polluted soil and heavy metals, applied in the field of phytoremediation of heavy metal-contaminated soils, can solve problems such as high cost and economic loss, poor repair effect, small plant biomass, etc., achieve good enrichment capacity, repair heavy metal-contaminated soil, The effect of increasing the total amount of extraction

Inactive Publication Date: 2016-10-12
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

[0005] The object of the present invention is, in order to overcome the deficiency in the phytoremediation process, provide a kind of method utilizing peanut-oil sunflower rotation mode to repair heavy metal contaminated soil, to solve the problem that plants have small biomass in the repair process, the actual repair effect is not good, economical Low benefit, high cost and economic loss due to repair time

Method used

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  • Method of repairing heavy metal polluted soil by using peanut-oil sunflower crop rotation mode
  • Method of repairing heavy metal polluted soil by using peanut-oil sunflower crop rotation mode
  • Method of repairing heavy metal polluted soil by using peanut-oil sunflower crop rotation mode

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Embodiment 1

[0020] Example 1 Remediation Test of Peanut-Oil Sunflower Rotation on Contaminated Farmland Soil

[0021]The test site is located in Suxian District, Chenzhou City. Shizhuyuan Nonferrous Metal Mine, known as the "Museum of Nonferrous Metals", is located in this area. Years of mining, mineral processing and random accumulation of slag have caused heavy metals in the farmland soil of the mining area Cu, Zn, For the compound pollution of Pb, Cd and As, the background value of heavy metals in the soil is shown in Table 1 below.

[0022] Table 1 The content of heavy metals in polluted soil (unit: mg / kg)

[0023]

[0024]

[0025] The specific method is: plow, remove impurities, and fertilize the farmland soil in mining areas polluted by heavy metals. On March 20th, the peanut seeds were sown directly into the soil by artificial spotting; after sowing, the soil was covered and leveled, and the herbicide was evenly sprayed on the ridge surface, and then covered with film; 8-12...

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Abstract

A method for remediating heavy metal-contaminated soil using the peanut-oil sunflower rotation pattern, in which peanuts and oil sunflowers are planted in the heavy metal-contaminated soil in the peanut-oil sunflower rotation pattern according to their natural growth periods for restoration. Peanut and oil sunflower have no toxic effects in the heavy metal compound polluted soil, and the yield of the seeds has reached the normal level; and the peanut-oil sunflower rotation model has a large biomass, which can absorb and accumulate a variety of heavy metals, especially for the extraction of heavy metals Zn and Cd The amount is quite large, and the extraction effect is close to that of the super-accumulator plant Cerulean indigo. This crop rotation mode is relatively simple to cultivate and convenient to manage. It makes good use of the polluted land in terms of time and space, and speeds up the restoration. The obtained oil fruits can be used as non-edible oil resources to avoid entering the food chain. It can make up for the shortage of oil resources, bring better economic benefits to farmers, and reduce repair costs.

Description

technical field [0001] The invention relates to a phytoremediation technology for heavy metal-contaminated soil, in particular to a method for remediating heavy metal-contaminated soil by using a peanut-oil sunflower rotation pattern. Background technique [0002] The enrichment factor (BCF) of heavy metals in plants, the biomass of plants and the total amount of heavy metals in soil are important factors to evaluate the potential of phytoremediation for soil heavy metal remediation. Among them, the enrichment factor (BCF) is usually used to evaluate whether a plant has the ability to absorb and accumulate heavy metals. Generally speaking, the enrichment coefficient of heavy metal hyperaccumulator plants is quite high, but these hyperaccumulator plants grow slowly and have relatively small biomass, which makes the amount of heavy metals actually taken away from the soil during phytoremediation very small , failing to achieve the purpose of truly remediating polluted soil. ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 曾清如杨洋周细红
Owner HUNAN AGRICULTURAL UNIV
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