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A kind of biological removal method of heavy metal in soil

A heavy metal removal technology, applied in the field of phytoremediation of polluted soil, to achieve the effects of increasing the amount of extraction, reducing idle time, and shortening the restoration cycle

Active Publication Date: 2021-07-20
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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  • A kind of biological removal method of heavy metal in soil
  • A kind of biological removal method of heavy metal in soil
  • A kind of biological removal method of heavy metal in 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 polluted soil, in particular to a method for biological removal of heavy metals in soil. The method includes: in November of the first year, ridges are formed on the plowed land, ryegrass is planted on the bottom and slope of the ridge, and cuttings are transplanted on the top of the ridge; Harvest the first batch of ryegrass from late March to April, and remove the whole ryegrass at the bottom and slope of the ridge in mid-May; transplant giant ryegrass seedlings on the top of the ridge in mid-March of the second year, from April to May Remove the whole plant in July; harvest the first crop of Jujuncao in July and leave more than 5cm of stubble, and harvest the whole giant Juncao in November. The invention utilizes the growth cycle reasonably and efficiently, and arranges harvest stubble, realizes the maximization of plant biomass and heavy metal absorption in soil, and improves the land utilization rate.

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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Patent Type & Authority Patents(China)
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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