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Method for in-situ remediation of benzene series in soil through plant-microorganism-charcoal combined remediation technology

An in-situ restoration and joint restoration technology, applied in the restoration of contaminated soil, etc., can solve problems such as human injury, soil hazards, hazards, etc., and achieve the effects of small engineering, environmental improvement, and environmental pollution restoration

Inactive Publication Date: 2020-08-14
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the strong toxicity and volatility of benzene series, the benzene series in the soil not only cause great harm to the soil, but also the pollutants in it will enter the human body through the food chain, causing greater damage and harm to the human body. harm

Method used

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  • Method for in-situ remediation of benzene series in soil through plant-microorganism-charcoal combined remediation technology
  • Method for in-situ remediation of benzene series in soil through plant-microorganism-charcoal combined remediation technology
  • Method for in-situ remediation of benzene series in soil through plant-microorganism-charcoal combined remediation technology

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Experimental program
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Effect test

preparation example Construction

[0036] 3. Preparation of biochar

[0037] Rinse the corn stalks with water to remove dirt and dust on the surface, cut into small pieces of 1-3cm, and air-dry for 3 hours under natural conditions; then put them in an oven at 80°C for 10 hours, take them out, crush them, put them in a crucible, and cover them Cover and seal, place in a muffle furnace, carbonize at 400°C for 6 hours, take it out after cooling to room temperature, grind, and pass through a 60-mesh sieve to obtain biochar.

[0038] 4. Sprinkle biochar in the soil containing benzene series, the amount of biochar spraying is 2-3kg / m 2 .

[0039] 5. Sow ryegrass seeds and alfalfa seeds impregnated with the fermented liquid of Rhizobium meliloti in the soil that has been sprinkled with biochar. 30cm, the sowing width is 5-10cm, the upper part of the seed is covered with soil 1-2cm, water once a day in the morning and evening from the 20th day after sowing, and water once a day from the 20th to 40th day; loosen the s...

Embodiment 1

[0044] In this embodiment, the site of a waste tire refinery in Dingjia, Group 3, Xinkai Village, Jiguanshan Town, Fengcheng City, Dandong City, is used as the test site. The site covers an area of ​​about 1200 square meters and has been tested to contain toluene. In order to show the remediation effect of toluene in the plant-microbial-biochar joint remediation soil of the present invention, the remediation test was carried out in the tire oil tank area, the eastern area of ​​the drainage seepage pit and the western area of ​​the drainage seepage pit respectively in the waste tire refinery site, each area Divide 3 test fields respectively, each test field specification is 20m * 10m, wherein one test field adopts the method of the present invention, and other two test fields are used as control experiments. The test lasted a total of 70 days, of which the plants were planted for 60 days.

[0045] One, the inventive method is as follows:

[0046] 1. Seed pretreatment

[0047]...

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Abstract

The invention relates to a method for in-situ remediation of benzene series in soil through a plant-microorganism-charcoal combined remediation technology. According to the technical scheme, biochar is applied to soil containing benzene series, and then ryegrass seeds and medicago sativa seeds soaked in medicago sativa rhizobium fermentation liquor are sown. By the adoption of the method, the degradation rate of methylbenzene in soil reaches 83% after 60 days. According to the method, benzene series in the soil are effectively and reasonably restored, meanwhile, proper vegetation is planted, landscapes of the area are beautified, and economic benefits and ecological environment benefits are obtained. Meanwhile, a charcoal and plant microorganism combined remediation method is adopted, so that waste in agricultural production can be reasonably reutilized while benzene series are remediated and degraded, and the value of waste crops is brought into full play.

Description

technical field [0001] The invention relates to a method for in-situ restoration of benzene series (toluene) in soil by using a plant-microbe-biochar combined restoration technology, and belongs to the technical field of ecological restoration. Background technique [0002] Benzene series are volatile and semi-volatile persistent or refractory organic pollutants, and are important organic pollutants in the natural environment. Benzene series are almost insoluble in water, with relatively stable physical and chemical properties and refractory degradation. It has strong carcinogenicity, teratogenicity and mutagenicity, and can seriously affect the growth and reproduction of animals, plants and microorganisms. The water solubility of benzene series is poor, and when it exists in the soil, the benzene series will be closely combined with the particulate matter in the soil. This brings great difficulty to the removal and treatment of benzene series in soil. Due to the strong t...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
CPCB09C1/00B09C1/105B09C2101/00
Inventor 包红旭刘笑含徐晓红宋泽斌胡家伟李泽刘洪源巨承文高东宏蒋大展金楠珣
Owner LIAONING UNIVERSITY
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