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Method for removing heavy metal organisms from soil

A heavy metal removal technology, applied in the field of phytoremediation of contaminated soil, to achieve the effect of improving remediation efficiency, improving economic benefits, and shortening the remediation cycle

Active Publication Date: 2019-09-27
JIANGXI JIEDI ENVIRONMENTAL TREATMENT & ECOLOGICAL TECH CO LTD
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  • Claims
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Problems solved by technology

However, current research mainly focuses on crop rotation or intercropping, and there are few reports on the comprehensive application of intercropping and crop rotation.

Method used

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  • Method for removing heavy metal organisms from soil
  • Method for removing heavy metal organisms from soil
  • Method for removing heavy metal organisms from soil

Examples

Experimental program
Comparison scheme
Effect test

experiment example 2

[0082] Experimental example 2: Remediation application of heavily polluted soil

[0083] The test area is located in a farmland polluted by smelters and other enterprises in Guixi City, Jiangxi Province. This area is a typical low mountain and hilly landform. The soil types are mainly red soil and paddy soil. The main pollutants are heavy metals Cu and Cd. The basic physical and chemical properties of the soil are The properties are shown in Table 11. According to the Soil Environmental Quality Agricultural Land Soil Pollution Risk Control Standard (GB 15618-2018), the Cd content is between the farmland soil Cd risk screening value (0.3mg / kg) and the control value (1.5mg / kg), and the Cu content exceeds The risk screening value of Cu in farmland soil is 13.4 times.

[0084] Table 11 Basic physical and chemical properties of the tested soil

[0085]

[0086] The specific treatment is as follows: This experiment adopts a single factor difference repeated design, with 5 treat...

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Abstract

The invention relates to the technical field of phytoremediation of contaminated soil, in particular to a method for removing heavy metal organisms from soil. The method comprises the following steps: in November of the first year, ridging on a ploughed plot, planting ryegrass on the bottoms and slopes of ridges, and cutting and transplanting sedum plumbizincicola on the tops of the ridges; harvesting a first crop of the ryegrass from late March to April in the second year, and removing the whole plants of the ryegrass on the bottoms and slopes of the ridges in the middle of May; transplanting pennisetum sinese seedlings on the tops of the ridges in the middle of March in the second year, and removing the whole plants of the sedum plumbizincicola from April to May; harvesting a first crop of the pennisetum sinese in July and remaining stubble for 5 cm or above, and harvesting the whole plants of the pennisetum sinese in November. According to the method, a fertility cycle is reasonably and efficiently utilized, and harvesting crops for rotation are arranged, so that plant biomass is maximized and the absorptive amount of heavy metal in the soil is maximized, and the land utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of polluted soil, in particular to a method for biological removal of heavy metals in soil. Background technique [0002] In recent years, the heavy metal pollution in my country's farmland soil has become more and more serious. In April 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources issued a national survey bulletin on soil pollution, pointing out that the rate of farmland locations exceeding the standard reached 19.4%. 7%. The State Council issued the "Soil Pollution Prevention and Control Action Plan" in May 2016, which also clearly put forward the requirements, and the restoration of cultivated land in my country is imperative. [0003] Traditional farmland heavy metal pollution remediation technologies include agronomic regulation, passivation remediation and phytoremediation. Agronomic regulation mainly adopts measures such as soil conditioner...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 祝振球梁家妮周典海崔红标
Owner JIANGXI JIEDI ENVIRONMENTAL TREATMENT & ECOLOGICAL TECH CO LTD
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