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A method for rhamnolipid modified biochar to strengthen Spartina to remediate oil-contaminated soil

A rhamnolipid and oil-polluted technology, applied in the restoration of polluted soil, carbon preparation/purification, etc., can solve the problems of low bioavailability of organic pollutants, increase of petroleum hydrocarbons, low biological efficiency, etc., and achieve recovery And improve the effect of biodiversity, strong nitrogen fixation ability, and more rhizosphere microorganisms

Active Publication Date: 2021-06-08
NANKAI UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low bioavailability and low biological efficiency of organic pollutants in the soil, and provide a method for strengthening Spartina with rhamnolipid modified biochar to repair oil-contaminated soil, using rhamnolipid modified Biochar improves the soil environment, provides nutrients and increases the bioavailability of petroleum hydrocarbons in the soil, etc., while promoting plant growth and development, it strengthens the transfer of organic pollutants to plants. By adding rhamnolipids to petroleum-contaminated soil Modified biochar to achieve the purpose of strengthening phytoremediation of oil-contaminated soil

Method used

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  • A method for rhamnolipid modified biochar to strengthen Spartina to remediate oil-contaminated soil
  • A method for rhamnolipid modified biochar to strengthen Spartina to remediate oil-contaminated soil

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Embodiment

[0029] (1) The rice husk was repeatedly washed with deionized water to remove surface dust, and dried in a drying oven at 60° C. for 12 hours. Crush the washed and dried rice husks to a particle size of about 2 mm, place the crushed rice husks in a ceramic crucible (full), and use N 2 Close the lid immediately after removing the air. After sealing the crucible and lid with tinfoil paper, pyrolyze in a muffle furnace at 700°C for 3 hours with limited oxygen. The biochar obtained by pyrolysis was passed through a 50-mesh sieve, washed with 1mol / L HCl solution, and then washed repeatedly with deionized water until the pH of the biochar solution was close to neutral. Put the washed biochar in an oven, dry it at 80°C, and store it in a glass sample bottle, which is recorded as 700BC.

[0030] (2) Prepare 10mmol / L rhamnolipid aqueous solution, then add the biochar obtained in 10g step (1) and 50mL rhamnolipid aqueous solution into a 100mL Erlenmeyer flask, place on a magnetic stir...

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Abstract

A method for strengthening Spartina with rhamnolipid-modified biochar for remediation of oil-contaminated soil. In this method, firstly, rhamnolipids are loaded on biochar to prepare rhamnolipid-modified biochar, and the rhamnolipid-modified biochar is mixed with petroleum-contaminated soil, and then the seedlings of Spartina are transplanted to the Remediation of contaminated soil can be achieved in the soil. The combination of Spartina and rhamnolipid-modified biochar to remediate oil-contaminated soil can help improve soil degradation and productivity decline caused by oil pollution, and restore and increase the biodiversity of polluted soil. Rhamnolipid-modified biochar can improve the soil environment, provide nutrients for Spartina and increase the bioavailability of petroleum hydrocarbons in soil, thereby promoting the growth and development of Spartina and enhancing the tolerance of Spartina to petroleum hydrocarbons And significantly improve the efficiency of Spartina to remediate oil-contaminated soil. The invention has wide application range, convenient operation, continuous operation in situ and no secondary pollution.

Description

technical field [0001] The invention provides a method for repairing oil-contaminated soil by strengthening Spartina with rhamnolipid modified biochar, and belongs to the technical field of repairing contaminated soil. Background technique [0002] In recent years, the use of low-cost and environmentally friendly phytoremediation technology to treat oil-contaminated soil has been widely recognized by researchers at home and abroad. Phytoremediation is a complex process, mainly including plant extraction, plant volatilization, plant fixation, plant absorption transformation and rhizosphere microbial restoration. The effect of phytoremediation is easily limited by factors such as temperature, time, pollutant distribution, and soil nutritional conditions. Studies have shown that adding biochar can improve the efficiency of phytoremediation technology in terms of improving the soil environment and providing nutrients. However, some polymer polycyclic aromatic hydrocarbons in s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00C01B32/05
Inventor 唐景春甄梅楠宋本如于宸李松
Owner NANKAI UNIV
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